| 单词 | air mass |
| 例句 | Hubbard began to explain that a tropical air mass was moving in from— Groves cut Hubbard off. Bomb 2012-01-01T00:00:00Z The cold air masses created by this icecap clash with the warm winds from the ocean to churn up a storm belt that surrounds the continent, making the Southern Ocean the most treacherous sea anywhere. Shipwreck at the Bottom of the World 1998-11-17T00:00:00Z Cold air masses sliding down the sides of the glaciers speed up until they become winds of close to 200 miles per hour. Shipwreck at the Bottom of the World 1998-11-17T00:00:00Z And the wind itself: tracking wind speeds associated with an advancing air mass is but a small part of the general meteorological chops everyone in the tower must have. The Cost of Defying the President 2017-02-12T05:00:00Z Then, as the air masses are destabilized at the mountain ridges, continuous thunderstorm activity continues as a result for most of the year. 16 of the Coolest Light Phenomena Around the World 2015-03-12T04:00:00Z Just as a tornado erupts from converging hot and cold air masses, the Sharknado is a perfect storm formed from two opposing media trends colliding. "This Show Is Insane!" And That Means It's Working. 2014-07-25T04:00:00Z A. A brutal Arctic air mass is about to take over the United States. Style Invitational Week 1324: Chapter and worse 2019-03-21T04:00:00Z But that was clear air turbulence, which is when two different air masses interact with each other even in clear skies. 6 common misconceptions about flying 2021-08-09T04:00:00Z “Additionally, a drier air mass will move over the islands by this afternoon, bringing an increased risk for fire danger due to strong and gusty trade winds.” Firefighters extinguish small Maui wildfire that broke out during wind warning 2023-11-14T05:00:00Z During North America’s winter months, it plays a major role in separating warm and cool air masses, all while steering storms from the Pacific across the continent. Winter Could Be Warmer in the North and Wetter Across the South 2023-10-19T04:00:00Z It generally flows within relatively straight boundaries, segregating cold polar air masses from the midlatitudes, but at times it can naturally develop big wobbles. Study identifies jet-stream pattern that locks in extreme winter cold, wet spells 2023-10-04T04:00:00Z And a big hot air mass sitting over the middle United States blocked the storm from turning east. How a mix of natural and human-caused factors cooked up Tropical Storm Hilary’s soggy mess 2023-08-21T04:00:00Z “A moister air mass has moved over much of the Klamath today which should moderate fire behavior on any new starts,” the forest service said in a statement. Lightning starts new wildfires but moist air aids crews battling blazes in rural Northern California 2023-08-21T04:00:00Z In addition to worsening air quality, the region’s fire threat has been elevated to “critical,” according to Michalski, because of dry materials, low humidity and unstable air mass. Seattle braces for smoke as fire threats worsen across region 2023-08-19T04:00:00Z Brooks says Italy’s Po Valley is also known as a hail region, where storms are fed when winds blow over the Alps from the northwest and hit warmer, wetter air masses from the Adriatic Sea. Is Climate Change Causing More Record-Breaking Hail? 2023-08-11T04:00:00Z “A very hot air mass is likely to bring major to extreme heat impacts away from the coast,” the agency wrote. Dangerous heat is coming to Los Angeles this weekend, raising warnings in the valleys 2023-07-21T04:00:00Z What’s unusual is that big hot air mass just hasn’t been moving. How a mix of natural and human-caused factors cooked up Tropical Storm Hilary’s soggy mess 2023-08-21T04:00:00Z The particularly stagnant warm air mass is now centered over California, Adams said, trapping heat near the surface — known as a “heat dome.” Dangerous triple-digit temperatures expected in Southern California's inland areas this weekend 2023-07-14T04:00:00Z The “intense” heat is caused by an area of high pressure over Southern California that began Wednesday, leading to a warm air mass known as a “heat dome” that traps the heat near the surface. How hot will it get in Southern California this weekend? What you need to know 2023-07-14T04:00:00Z The air mass remains on the dry side, though, so temperatures will drop into the 50s overnight heading into Saturday, providing some relief from the heat. Seattle weather forecast: Sunny and warm weekend, then chance of rain 2023-07-14T04:00:00Z The air mass is not expected to mix with other areas, resulting in the air being still and keeping the region warm. 'Heat dome' will hit Southern California with triple-digit highs, fire danger 2023-07-12T04:00:00Z However, an air mass can sometimes block a storm, driving it north or northeast toward the Baja California peninsula and other parts of the west coast of Mexico. Hurricane Adrian Forms Off the Coast of Mexico in the Eastern Pacific 2023-06-28T04:00:00Z The heatwaves, the second round in about 10 days, were caused by warm air masses associated with high pressure ridges in the atmosphere. Beijing sweats in extreme heat for record third day 2023-06-24T04:00:00Z Chinese meteorologists say the current heat wave has been caused by warm air masses associated with high-pressure ridges in the atmosphere and compounded by thin cloud covers and long daylight hours around the summer solstice. Beijing sizzles under worst heat wave and authorities ask people to stay indoors 2023-06-24T04:00:00Z Although somewhat similar air masses do clash in other places, such as Uruguay and Bangladesh, the forces are much more powerful over the U.S. Watch Out: Tornado Alley Is Migrating Eastward 2023-05-11T04:00:00Z But rapid melting brought on by an early-season heat wave — or even just a warm, humid air mass — could swamp areas already coping with flooding. California’s snowpack is the deepest in 70 years. Now get ready for perilous 'big melt' 2023-04-03T04:00:00Z Rainfall is expected to stay in the forecast into Monday as a cold, unstable air mass settles over Western Washington over the weekend. Seattle weather forecast: ‘Unseasonably strong’ system on way 2023-03-31T04:00:00Z The hot dry air from places like New Mexico puts a stronger “cap” on where storms would normally brew when air masses collide in spring time. Study says warming-fueled supercells to hit South more often 2023-03-27T04:00:00Z Like a sponge being squeezed and continually replenished, that self-replacing air mass will unload exceptional precipitation over the West. Another powerful storm is set to intensify flood threat in California 2023-03-13T04:00:00Z Milder winters mean the unstable air masses that can create supercells may become more likely in March or even earlier in the southeastern U.S. Watch Out: Tornado Alley Is Migrating Eastward 2023-05-11T04:00:00Z The Met Office said the unsettled weather was a result of a clash between an Arctic maritime air mass and milder Atlantic air. Flights suspended as Arctic air, snow and sleet blast UK 2023-03-08T05:00:00Z Rare blizzard warnings went into effect in late February in the mountain ranges of Southern California as an arctic air mass plunged down the West Coast, plastering California’s coast ranges and the Sierra Nevada. Californians still digging out from severe snowfall 2023-03-06T05:00:00Z “That means there are opportunities for these cold air masses to come down with these winter systems, and really bring cold air a lot further south than we might normally expect it,” he said. ‘Pretty Epic’ Mountain Snowfall Stuns Californians 2023-03-06T05:00:00Z When those two air masses meet, it creates upward movement and instability, which can cause “supercharged” precipitation, Reedy said. Seattle forecast: Gusty rain, snow in the passes, then maybe sunshine 2023-03-02T05:00:00Z Friday will bring another cool air mass to Western Washington, although temperatures will not be as low as earlier in the week, Felton said. Seattle’s lowland snow was hit and miss — expect more of the same this week 2023-02-28T05:00:00Z The cold air mass, which Michalski said blew in from Eastern Washington and British Columbia, broke or tied daily temperature records Friday. Light snow bound for Seattle Saturday; up to a foot in the passes 2023-02-25T05:00:00Z Snow levels will hover around sea level across Western Washington with the cold air mass in place, and light snow is forecast to arrive mid-afternoon Saturday from north to south, according to the weather service. Seattle-area weather: Sub-freezing temperatures, another chance of snow 2023-02-24T05:00:00Z These vortexes are created when a cold, low-pressure system high in the atmosphere creates a spin in the air masses at low levels. Winter storm moving through SoCal spawns tornado 2023-02-24T05:00:00Z A cold air mass has moved deep into California, dropping temperatures and setting the stage for a couple of days that could be both messy and spectacular. California Prepares for Storm That Could Bring Beauty and Chaos 2023-02-23T05:00:00Z This was possible because the two air masses are spinning in opposite directions, like the disks on a pitching machine. Opinion: Snow, rain, wind and cold in California? Here's some good news about this week's winter storms 2023-02-22T05:00:00Z That air mass is so large and cold that the Seattle area could see light lowland snow into early next week, Michalski said. Light snow bound for Seattle Saturday; up to a foot in the passes 2023-02-25T05:00:00Z A powerful winter storm is slicing through Southern California this week as a cold Canadian air mass overruns the state, bringing strong winds and a chance of snow at unusually low elevations. Southern California winter storm could bring snow to Santa Monica Mountains 2023-02-21T05:00:00Z Pope Francis has ended his peace pilgrimage to South Sudan by celebrating an open air mass attended by tens of thousands in Juba. Pope Mass in South Sudan: Pontiff urges people to reject 'venom of hatred' 2023-02-05T05:00:00Z People across the northeastern United States confronted the coldest temperatures seen in decades on Saturday, as an Arctic air mass passed over the region, accompanied by powerful winds that drove wind chills to dangerous levels. The Northeast is battered by frigid temperatures that reached record lows 2023-02-04T05:00:00Z The core of the Arctic air mass will be over northern New England, but even places such as New York City were expected to experience wind chill readings below zero. Across the Northeast, officials warn of a dangerous Arctic blast 2023-02-03T05:00:00Z Early on Friday, the core of the cold air mass, driven from Arctic Canada into the United States by high-altitude air currents, was centered over the U.S. Arctic blast barrels into U.S. Northeast, threatening record lows 2023-02-03T05:00:00Z And then, as quickly as the Arctic air mass moves in, it will move out. The Northeast Braces for the Worst Windchill in Decades 2023-02-02T05:00:00Z In Kinshasa on Wednesday as thousands queued for the pope's open air mass, many declined to answer when asked what they thought about his stance on decriminalisation. As Pope Francis visits Congo, LGBT+ activists cheer for perceived ally 2023-02-01T05:00:00Z The core of the Arctic air mass passed over northern New England, where residents pride themselves on cold-weather endurance. The Northeast is battered by frigid temperatures that reached record lows 2023-02-04T05:00:00Z Gusty winds are forecast over western Whatcom County and the San Juan Islands as the air mass blows through the Fraser River Valley into Washington. Seattle’s post-5 p.m. sunsets are here — and so is more cold weather 2023-01-26T05:00:00Z A dangerously frigid Arctic air mass gripped a vast expanse of the United States in late December, bringing floods, power outages, mudslides, evacuations and road closures. Insurer Travelers profit falls on winter storm costs 2023-01-24T05:00:00Z This is especially true when winds closer to the ground push air masses toward rising terrain, so they have no option but to rise as well. How a saucer-like cloud hovered over Turkey on Thursday 2023-01-22T05:00:00Z “On the flip side of the mountain range, the air mass warms and dries as it sinks.” 5 fun winter ideas from ‘52 Ways to Nature: Washington’ author Lauren Braden 2023-01-18T05:00:00Z As the pressure difference, or gradient, grows between the low-pressure air mass and the neighboring higher-pressure air mass, the winds pick up sharply. ‘Polar Vortex’ Got You Baffled? Try This Extreme-Weather Guide 2023-01-18T05:00:00Z Bomb cyclones are often associated with atmospheric rivers and typically form in winter when cold and warm air masses collide. Explainer: What are atmospheric rivers and bomb cyclones? 2023-01-05T05:00:00Z A warm air mass moving over Europe from the west coast of Africa brought the unseasonable weather. Record-High Temperatures across Europe Ease Energy Crisis Imposed by Russia’s War 2023-01-05T05:00:00Z The winds combined with the clash of air masses into what meteorologists call a bomb cyclone, a rotating, fierce storm that can bring heavy snow or rain and cause tidal surges in coastal areas. A ‘Once in a Generation’ Storm. What’s the Role of Climate Change? 2022-12-28T05:00:00Z “As it moves into that cold air mass, it doesn’t displace it all at once,” said Kirby Cook, a National Weather Service meteorologist in Seattle. Worst ice in a decade leaves Seattle area shut down, immobile 2022-12-23T05:00:00Z The culprit is wind shear, which is when two huge air masses close to each other move at different speeds. Turbulence persists as a major cause of injuries on flights 2022-12-20T05:00:00Z The alerts herald the arrival of an even more significant deep freeze that will plunge the Plains into an air mass more typical of northern Alaska. Blockbuster storm, bitter arctic outbreak to blast U.S. before Christmas 2022-12-19T05:00:00Z The cold air mass is expected to begin its surge southward by the middle of the week, sweeping from the Northern Rocky Mountains toward the eastern part of the country. Winter Storm and Bitter Cold Could Disrupt Holiday Travel, Forecasters Say 2022-12-18T05:00:00Z Forecasters are warning of treacherous holiday travel and life-threatening cold for much of the nation as an arctic air mass blows into the already-frigid southern United States. Arctic air will blast much of US just before Christmas 2022-12-18T05:00:00Z A cool air mass moving through the Southland this week is expected to deliver gusty winds, subfreezing temperatures and a potentially significant storm system by week’s end, the National Weather Service said. Cool temperatures in Southern California could give way to 'potent storm' by weekend 2022-11-28T05:00:00Z While tropical storm systems are fueled primarily by warm water, nor’easters gain energy from sharp temperature gradients where cold and warm air masses meet. Why a Warming Climate Can Bring Bigger Snowstorms 2022-11-21T05:00:00Z Once the warmer, tropical-like rainy weather from Nicole pushes through the Northeast, a colder air mass will move across the East, dropping high temperatures well below average on Sunday. Nicole Will Move Up the East Coast, Bringing Heavy Rain 2022-11-10T05:00:00Z Along the leading edge of the cold air mass, a winter storm will develop across parts of the Central Appalachians, eastern Great Lakes, Mid-Atlantic and Northeast, forecasters said. Winter Storm and Bitter Cold Could Disrupt Holiday Travel, Forecasters Say 2022-12-18T05:00:00Z The “rare and hazardous arctic air mass will likely bring extreme and prolonged freezing conditions for southern Mississippi and southeast Louisiana,” the National Weather Service in a special weather statement Sunday. Arctic air will blast much of US just before Christmas 2022-12-18T05:00:00Z Kittell said a “significant storm system” is expected to arrive on the heels of the cold air mass by week’s end, likely moving in late Thursday and into Friday. Cool temperatures in Southern California could give way to 'potent storm' by weekend 2022-11-28T05:00:00Z “Certainly the air mass is cool enough to support any snowfall, but the question is whether or not there is any lingering precipitation,” Michalski said. Heavy rain, strong winds and freezing temps expected in Seattle area 2022-11-03T04:00:00Z A low-pressure system is sitting just off the coast, pushing an unstable air mass across the area, Hall said. Scattered storms, lightning hit Southern California, with more expected 2022-10-12T04:00:00Z The warm weather is being created by a typical summer weather pattern, he said, called an upper ridge, which is a pooling of warm, dry air mass. Seattle sees extra dose of summer 2022-10-02T04:00:00Z A warm, high pressure air mass, compounded by a slight offshore push delaying the sea breeze, is driving the current stretch of extreme heat, Rorke said. Southern California braces for another September heat wave 2022-09-26T04:00:00Z The cumulative impact, Mr. Swain said, has not only superheated air masses during the day but has also made nights warmer, worsening drought, turning trees and brush into tinder and intensifying fire risks. California narrowly averts electricity crisis as it sets records for energy use amid scorching heat. 2022-09-06T04:00:00Z All five events stemmed from stationary fronts and anomalously-humid air masses. Analysis | Five 1,000-year rain events have struck the U.S. in five weeks. Why? 2022-08-23T04:00:00Z Its direct impacts were minimal, but it trucked ashore an air mass with deep tropical moisture. At least one dead after Dallas area hit by 1-in-1,000-year flood 2022-08-22T04:00:00Z The answer is that the air masses that produce tornados are themselves rotating, and when the radii of the air masses decrease, their rate of rotation increases. College Physics for AP Courses 2015-08-12T00:00:00Z The torrents in the Washington region were set off by a slow-moving cold front as it clashed with a very hot, humid air mass. Here’s how extreme the D.C.-area rainstorm was Wednesday night 2022-08-11T04:00:00Z A stalled front separates these opposing air masses and is acting like train tracks for the repeated passage of heavy thunderstorms over the Korean Peninsula. At least 8 dead in Seoul-area flooding amid record rainfall 2022-08-08T04:00:00Z Because an air mass is being constantly replenished and fed into these storms, that can quickly lead to a 10 or 20 percent increase in precipitation totals. Analysis | Five 1,000-year rain events have struck the U.S. in five weeks. Why? 2022-08-23T04:00:00Z The offshore high weakens and moves south, while at the same time the polar jet stream begins to dip south and bring cooler air masses and high pressure to the Great Basin. For coastal L.A., the hottest days of summer are yet to come 2022-07-23T04:00:00Z The plane is moving straight ahead relative to the air, but the movement of the air mass relative to the ground carries it sideways. College Physics for AP Courses 2015-08-12T00:00:00Z While that will cap temperatures slightly lower — between 98 and 102 degrees — the moisture-filled air mass will help heat indexes top 105 degrees. Extreme heat prompts alerts in 28 states as Texas, Oklahoma hit 115 2022-07-20T04:00:00Z Airspeed refers to the speed a plane can travel relative to its surrounding air mass. Algebra and Trigonometry 2015-02-13T00:00:00Z The intense sunlight at the equator heats air, causing it to rise and cool, which decreases the ability of the air mass to hold water vapor and results in frequent rainstorms. Environmental Biology 2018-09-06T00:00:00Z “One thing I still recall clearly was how much the derecho modified our air mass,” he said in an email. Meteorologists remember the June 2012 Mid-Atlantic derecho 2022-06-28T04:00:00Z For example, the velocity of an airplane relative to an air mass is different from its velocity relative to the ground. College Physics for AP Courses 2015-08-12T00:00:00Z Neff said the August 2021 melt event was associated with warm air masses moving across North America that probably combined with moisture from the south Atlantic, before moving to the southwest coast of Greenland. How humid air, intensified by climate change, is melting Greenland ice 2022-06-02T04:00:00Z However, the winds blew in with a dry air mass and didn’t carry much moisture, and humidity remained low, which likely assisted in the fire’s spread, Brandt said. How cold winds, a turbocharged fire and huge homes led to destruction in Laguna Niguel 2022-05-11T04:00:00Z Supercells require an optimum balance of wind shear — or a change in wind speed and direction with altitude — and an unstable air mass fueled by hot, humid and swiftly ascending air. 20 years after La Plata disaster, D.C. area’s tornado risk has grown 2022-04-27T04:00:00Z Meanwhile, the unusually far-south jet stream delivered atmospheric wave after atmospheric wave into an air mass primed for storm development. 2022 generated most March tornadoes on record in U.S. 2022-04-05T04:00:00Z Construct a problem in which you calculate the angle the airplane must fly relative to the air mass in order to have a velocity parallel to the runway. College Physics for AP Courses 2015-08-12T00:00:00Z This cold air mass will set the stage for the early-week winter storm. Nor’easter to paste Appalachians and interior New England with snow 2022-04-17T04:00:00Z “So the air mass that slams into Antarctica is much, much warmer. And it’s these episodes of extreme events that lead to ice shelf collapse.” Scientists solve an Antarctic puzzle 2022-04-14T04:00:00Z This vertical stratification of air mass properties destabilizes the atmosphere. 20 years after La Plata disaster, D.C. area’s tornado risk has grown 2022-04-27T04:00:00Z With strong April sunshine, a chilly unstable air mass and a convergence zone on deck, the chance of thunderstorms in Puget Sound is relatively high for the region, according to weather service meteorologist Dustin Guy. Chaotic weather ahead: Thunder, rain, hail, record-cold temps and even snow all possible this weekend 2022-04-08T04:00:00Z Thunderstorms, clustered into a squall line producing heavy rainfall, had become reinvigorated midday Tuesday as they moved into a humid air mass heated by the sun. Severe weather outbreak hits South after deadly tornadoes tear through Texas 2022-03-22T04:00:00Z This is primarily because the jet stream — which powers storms and pushes chilly air masses south and east as Arctic fronts — is strongest during the winter months. Analysis | The D.C. area’s strongest wind gusts are increasing — it’s not your imagination 2022-03-14T04:00:00Z This warm air mass is a much stronger block than you would normally expect in the Pacific in January and February, Tardy explained. Why it's been so warm and windy in Southern California this winter 2022-03-12T05:00:00Z The warm air mass lingers over California through Sunday, so the heat wave will continue, but the offshore Santa Ana winds will be replaced by weak onshore flow. Super Bowl LVI could be the hottest ever played. Here's why 2022-02-09T05:00:00Z The arctic air mass that has spread as far south as Florida has prompted freeze advisories for much of the sunshine state. Midwest storm bringing snow, cold air, while Florida faces freeze advisories 2022-01-24T05:00:00Z They erupted along a dryline, or the leading edge of arid air from the Desert Southwest, blossoming into a warm, moist and “unstable” air mass blowing in from the Gulf of Mexico. Severe weather outbreak hits South after deadly tornadoes tear through Texas 2022-03-22T04:00:00Z Fernandez, the meteorologist, said a warm air mass had formed over Argentina, right in the middle of the southern hemisphere summer. Argentine towns sizzle amid 'hottest days in history' 2022-01-14T05:00:00Z This wintry interior air mass is significantly colder than the air at sea level in Southern California. Why it's been so warm and windy in Southern California this winter 2022-03-12T05:00:00Z In spring, violently rotating thunderstorms called supercells are common across the country as cold and warm air masses meet and dance around each other. Cold, heat, fires, hurricanes and tornadoes: The year in U.S. weather disasters 2021-12-15T05:00:00Z When warm and cold air masses collide, less dense warm air rises upward into cooler levels of the atmosphere. Why the Southern U.S. Is Prone to December Tornadoes 2021-12-13T05:00:00Z Still, he said the warm December air mass in much of the country and La Niña conditions created ideal conditions for a turbulent event. A warming world could add more fuel to tornadoes, scientists say 2021-12-11T05:00:00Z Gensini says in the aggregate, extreme storms are “becoming more common because we have a lot warmer air masses in the cool season that can support these types of severe weather outbreaks.” EXPLAINER: Was tornado outbreak related to climate change? 2021-12-11T05:00:00Z The back-to-back storms, which are moving from the Gulf of Alaska, will also deliver a cooler air mass that is likely to linger into the weekend, he said. Rain, snow and chill are heading to Southern California this week 2021-12-06T05:00:00Z Temperatures in downtown Los Angeles were about 10 degrees below normal due to a cooler air mass that was moving in from the ocean, said Rich Thompson, meteorologist with the National Weather Service in Oxnard. L.A. area will see fall-like temperatures through Monday, forecasters say 2021-10-30T04:00:00Z This can happen when a cold air mass collides with a warm air mass, like air over warm ocean waters. NFL fans brave bomb cyclone to watch 49ers-Colts game 2021-10-24T04:00:00Z Meanwhile, a backdoor cold front, drawing in air from the ocean nearer the ground, is allowing a shallow, cooler marine air mass to slide ashore over the Delmarva Peninsula. How Tuesday’s sunrise cast a fiery crown over Washington’s sky 2021-10-05T04:00:00Z Freeze advisories and higher elevation snow will result from the colder air mass. Cold weather, storms forecast across central US as freeze advisories issued over Rockies 2021-09-30T04:00:00Z In the second half of August, a very active stormy period coincided with an unstable air mass fueled by steamy air pumped in from the south even in the absence of a nearby front. Analysis | Why Washington is the nation’s hot spot for severe storm warnings this year 2021-09-24T04:00:00Z “It’s still very dry fuels, very dry air mass and hot,” he said. Four Guardsmen safe, but giant sequoia burns; cabins threatened 2021-09-21T04:00:00Z The remnants of a cold front stalled out just to the southeast of the District with a warm and humid air mass in place. How torrential rain flooded parts of the District and Arlington and Fairfax counties Thursday 2021-09-17T04:00:00Z A cooler, drier air mass is forecast to settle into the Northeast and Mid-Atlantic following the historic and devastating rainfall that caused incredible damage and loss of life. Northeast, Mid-Atlantic see calmer weather; potential flooding in Central US, Midwest 2021-09-03T04:00:00Z Discussion: A tropical air mass will overspread the Mid-Atlantic as a warm front lifts north during the morning hours. Ida’s remnants to bring possible flooding, tornadoes to D.C. region on Wednesday 2021-08-31T04:00:00Z Heavy rain: This is the most widespread anticipated hazard, given very humid air imported by ex-Ida’s tropical air mass, and increased moisture pulled northward into the warm sector of the transforming storm. Ida’s remnants will affect the D.C. area Wednesday: What you need to know 2021-08-30T04:00:00Z The program provides the public with forecasts showing air mass projections. In the early 1990s, heat waves battered Philadelphia’s most vulnerable communities. The lessons learned are helping today. 2021-08-19T04:00:00Z An unstable air mass along with deep layer humidity well in excess of average values for mid-September pooled along the front. How torrential rain flooded parts of the District and Arlington and Fairfax counties Thursday 2021-09-17T04:00:00Z That helps it to truck a soupy, sultry air mass northward. Two major heat waves roasting Lower 48 states, 175 million Americans under alerts 2021-08-11T04:00:00Z As the day heats up and the weather front strengthens, that air mass is expected to become unstable. Dixie fire swells beyond 240,000 acres, swallowing homes: 'It’s been heartbreaking' 2021-07-30T04:00:00Z The polar air mass is slated to bring freezing temperatures to São Paulo and Minas Gerais, major producers of key commodities like sugar, citrus and coffee. Rio's homeless brave unprecedented cold 2021-07-30T04:00:00Z The polar air mass should move over Sao Paulo and Minas Gerais, major producers of sugar, citrus and coffee, on Friday, bringing freezing temperatures. Seeing snow for the first time at 62: Brazilians revel in icy snap 2021-07-30T04:00:00Z In the loop below, note the approach of two arc-shaped air mass boundaries, indicated by radar, just to the northwest of D.C. How surprise storms unleashed violent winds over the District on Monday evening 2021-07-27T04:00:00Z The chilly air mass over Washington is overtaking much of the eastern two-thirds of the United States, from the northern Rockies to northern Florida. Analysis | Abnormally chilly weather to hover over D.C., may delay cicada outburst 2021-05-06T04:00:00Z But the degree of air mass instability was on the low end, not vigorous enough to get meteorologists unduly concerned for severe thunderstorm activity. How a tornadic storm tore through West Virginia and parts of northern Maryland Monday 2021-05-04T04:00:00Z Exxon is asking the Texas court to rule that the massive storm, caused when an Arctic air mass swept the central United States, was a natural disaster. Exxon sues Macquarie Energy to avoid paying $11.7 million for storm-related delivery delay 2021-03-04T05:00:00Z Exxon is asking the Texas court to rule that the massive storm, caused when an arctic air mass swept the central United States, was a natural disaster. Exxon and Macquarie in $11.7 billion U.S. lawsuit over gas contract 2021-03-04T05:00:00Z A few minutes after these cool, dense air masses collided, up popped the solitary storm cell that generated the locally damaging winds over far southern Montgomery County and the northern part of the District. How surprise storms unleashed violent winds over the District on Monday evening 2021-07-27T04:00:00Z While affecting China, the same warm air mass spread to Japan and the Korean Peninsula over the weekend. Beijing soars to 78 degrees, its warmest winter temperature on record 2021-02-22T05:00:00Z He said the Birmingham area experienced a springtime air mass more typically seen in early June rather than January, with a temperature of 71 degrees coupled with humidity. Rare winter tornado kills teenager, injures dozens in Alabama 2021-01-26T05:00:00Z Sleet and freezing rain develop as a result of a layering of different air masses in the vertical, between the cloud base and ground. Ice storms: Inside wintertime’s dreaded, frozen mess 2020-12-02T05:00:00Z High-pressure ridges in the atmosphere cause these air masses to sweep down through the mountains toward the coast, warming up and gathering speed as they go. Why Winter Wildfires May Get Worse 2020-12-07T05:00:00Z Low-moisture air masses sometimes form and migrate thousands of kilometers over the sea, similar to the way hurricanes behave. Harsh Droughts Can Actually Start Over Oceans 2020-11-23T05:00:00Z Similarly, surface high pressure reinforced the sunshine, while also inducing a channel of warm, southerly winds that pumped in a toasty air mass from the south. Beijing soars to 78 degrees, its warmest winter temperature on record 2021-02-22T05:00:00Z A much drier air mass was also moving in. California braces for most dangerous fire weather of the season; PG&E already cutting off power to customers 2020-10-25T04:00:00Z Convergence of all that moist air leads to rising air, and in the presence of an unstable air mass, pockets of convection. How Thursday’s flood unfolded in the Washington region and why it was so hard to forecast 2020-09-11T04:00:00Z The core of Isaias will advance northward into this soupy air mass. Tropical storm watch for D.C. area. Isaias to bring threat of ‘significant’ flooding and strong winds Tuesday. 2020-08-02T04:00:00Z A drier air mass in the area and returning heat may impact efforts to get the blaze under control. Wildfire in California triggers new evacuations, firefighters work to contain blazes in other parts of state 2020-07-29T04:00:00Z “Most of our really bad air quality occurs in the summer, just as we see these thermal events that cause humid air masses to sit on top of us for days,” said Learner of ELPC. Chicago Learned Climate Lessons from Its Deadly 1995 Heat Wave 2020-07-16T04:00:00Z During that time, it effectively created a small ozone hole by lofting a pocket of ozone-depleted air from the lower atmosphere into the stratosphere and preventing the two air masses from mixing. Australia’s fires blew smoke 19 miles into the sky, similar to a predicted nuclear blast 2020-06-22T04:00:00Z The very narrow zone of heavy rainfall resulted from an extremely moist air mass, converging air and a weak disturbance over the area. How Thursday’s flood unfolded in the Washington region and why it was so hard to forecast 2020-09-11T04:00:00Z A "very unstable" air mass is expected across the region, which will cause storms to fire up in the afternoon. Severe weather threat for tens of millions across Midwest, 'enhanced' risk of damaging storms 2020-06-02T04:00:00Z This tropical air mass and circulation added to the development of thunderstorms, and there were plenty of lightning strikes within 10 miles of the launchpad. SpaceX launch rescheduled for Saturday in Florida still faces chance of bad weather 2020-05-28T04:00:00Z Thousands of feet above the Earth's surface, very strong winds called the "jet stream" move weather systems and air masses around the globe. What is a cutoff low? Why these stalled systems can create hazardous situations 2020-05-20T04:00:00Z At its southern edge, the contrast between this low pressure zone and the higher pressure air masses surrounding it intensifies a fast flowing, west-to-east current of air known as the polar jet stream. How a record-strong Arctic weather pattern aided a troubled Arctic research expedition 2020-04-29T04:00:00Z Moreover, Heller said, their formulae show the U.S. is still going through these oscillations of moist to dry air masses which directly affect indoor humidity. How is Germany controlling the coronavirus outbreak? 2020-03-09T04:00:00Z Friday marked the date of the climatological peak for bomb cyclones in the North Atlantic, given the typical intensity of the jet stream and intense air mass differences that tend to move over moisture-rich waters. Dennis, one of the Atlantic’s most powerful bomb cyclones, churns up 100-foot waves and slams Britain 2020-02-15T05:00:00Z Wednesday should see the most records broken as temperatures drop to the low teens to low 20s Fahrenheit when the eastward-moving air mass spans the Gulf coast to New England, he said. Autumn chill, with Siberian express right behind it, to hit U.S. eastern states 2019-11-08T05:00:00Z Mostly cloudy skies are likely to prevail during the afternoon and limit the amount of air mass destabilization, which is a good thing. Possible severe weather targets D.C. area, Mid-Atlantic region on Halloween evening 2019-10-30T04:00:00Z When a heatwave occurs, physical processes trigger its continuation: less ground humidity, increasingly high energy flows and increasingly hotter air masses, even at altitude. Europe failed to act after the 2003 French heatwave. We cannot ignore this one | Ruben Hallali 2019-07-01T04:00:00Z “This can happen when a cold air mass collides with a warm air mass, such as air over warm ocean waters,” the National Ocean Service explains on its website. 'Bomb cyclone' to sock central US with blizzard conditions, severe weather, raging winds for up to 70 million 2019-03-13T04:00:00Z The cold air mass made its way down the West Coast and then eastward over the spine of the Rocky Mountains to the nation’s midsection. A Disheartening Blast of Winter Weather Across the Nation 2019-03-03T05:00:00Z The National Weather Service says an arctic air mass will move into Indiana late Sunday. Indiana to see snowy, bitterly cold start to March 2019-03-02T05:00:00Z The National Weather Service says an arctic air mass will move across Michigan bringing temperatures in the northern part of the state as low as minus 13 on Sunday evening into Monday morning. Michigan expected to see subzero wind-chill start to March 2019-03-02T05:00:00Z The call comes as Minnesota experiences extremely cold temperatures and low wind chills due to the arctic air mass. Minnesota police called for welfare check on man that turns out to be cutout of MyPillow CEO 2019-03-02T05:00:00Z The cold air mass that has now moved east is uncommon, only seen about every five or 10 years, Mr. Kluber said. Midwest Weather Whiplash: From Deep Freeze to Melt, Bringing New Risks 2019-02-01T05:00:00Z "A record arctic air mass will remain over the central and eastern U.S. over the next several days," the NWS warned Tuesday. Polar vortex linked to 6 deaths as dangerous cold slams the Midwest 2019-01-30T05:00:00Z “Specifically, there were fewer days with very strong air mass contrasts across the Central Plains and Upper Midwest during the spring and summer of 2018, which contributes to the severe weather season.” When lightning strikes: America’s most struck states revealed 2019-01-10T05:00:00Z In the vertical dimension, such data are revealing how moisture mixes in air masses and through processes at the atmospheric boundary layer. Collapsing glaciers threaten Asia’s water supplies 2019-01-01T05:00:00Z But meteorological authorities emphasize that this effect is only reliably seen in large-scale air masses. The Way the Wind Blows 2018-12-03T05:00:00Z A dry air mass over the Great Basin pushed down overnight into the western valleys and coastal sections of the region. Powerful Santa Ana winds put officials on high alert for fire danger throughout Southern California - Los Angeles Times 2018-10-15T04:00:00Z Others are created by air currents spilling over mountain ridges or by the collision of air masses in “convergence zones” — places like shores and desert boundaries. AI gliders learn to fly using air currents, just like birds 2018-09-20T04:00:00Z This is all something of a continuation of the exceptionally warm and humid air mass that overtook the Northeast in August. The sun is back, finally! The past 10 days were about as gloomy as it gets. 2018-09-19T04:00:00Z An unpredictable warm air mass capable of producing a violent thunderstorm could blow radiation fallout to nearby populations. Review: With 'Doctor Atomic,' Santa Fe stages a nuclear tale as the opera of our time 2018-08-06T04:00:00Z But “in other places, like Greenland, it brings tropical waters and warm air masses farther north than it used to,” Rignot noted. Why Are Glaciers Melting from the Bottom? It's Complicated 2018-04-12T04:00:00Z The center of a storm will often form along the boundary of a weather front, the transition zone between two air masses of different densities. Wind, Snow, and Floods—What You Need to Know About the Northeast's Dangerous Winter Storm 2018-03-02T05:00:00Z Temperatures often fluctuate in the Arctic due to the strength or weakness of the polar vortex, the circle of winds – including the jetstream – that help to deflect warmer air masses and keep the region cool. Arctic warming: scientists alarmed by 'crazy' temperature rises 2018-02-27T05:00:00Z “The one thing I love most about rain in Seattle is the variability. My personal favorite is the convergence-zone rain, where you can see the air masses come together with pouring rain,” he said. ‘Extreme’ rainstorms becoming more common in Seattle, says city meteorologist 2018-02-03T05:00:00Z Those two air masses of very contrasting temperatures are interacting, and the storm forms right along that high-energy boundary there. What Is This "Bomb Cyclone" Threatening the U.S.? 2018-01-03T05:00:00Z An Arctic air mass will remain entrenched over the eastern two-thirds of the United States through the end of the week. 'Bomb cyclone': schools close as snowstorms hit US south-east 2018-01-04T05:00:00Z In a bomb cyclone, the temperature difference between the two air masses leads to a steep and rapid — meteorologists often use the term “explosive” — drop in atmospheric pressure. Why So Cold? Climate Change May Be Part of the Answer 2018-01-03T05:00:00Z Bomb cyclones, polar vortexes, and arctic air masses are expected to blanket the region. Bomb Cyclones and Polar Vortexes—This Winter's Scary Weather Explained 2018-01-03T05:00:00Z As the storm bears down, an arctic air mass will remain entrenched over the eastern two thirds of the country through the end of the week. Eastern U.S. braces for winter storm as bitter cold remains 2018-01-03T05:00:00Z In this case, that kink is very sharp, so there’s a very intense difference in air masses on either side of this jet stream boundary—and that’s driving the storm. What Is This "Bomb Cyclone" Threatening the U.S.? 2018-01-03T05:00:00Z In the case of Irma, meteorologists and their computers could read the air currents across a hemisphere and forecast the storm’s eventual collision with an air mass that would push it sharply to the north. Opinion | Irma reminds us of all we don’t know about the natural world 2017-09-10T04:00:00Z This time of year, we’re shifting from a drier, colder air mass in the winter to a warmer, more humid air mass in the summer, Mr. Homenuk explained. New York Today: Do April Showers Really Bring May Flowers? 2017-04-27T04:00:00Z After pressure plummets, air rushes in to fill the space between these two air masses, creating intense winds and strengthening the storm. Bomb Cyclones and Polar Vortexes—This Winter's Scary Weather Explained 2018-01-03T05:00:00Z As the storm bears down, an arctic air mass will remain entrenched over the eastern two thirds of the country through the end of the week. Eastern U.S. braces for winter storm as bitter cold remains 2018-01-03T05:00:00Z Officials also noted a dry line - a boundary that separates moist air mass from dry air - forming over the region. Forecasters say parts of Texas face critical wildfire danger 2017-02-22T05:00:00Z Air naturally cools as it rises in altitude; but during an inversion, warm air masses settle over a layer of cool air near the surface. Satellite Eye on Earth January 2017 – in pictures 2017-02-22T05:00:00Z Forecasters say the weather is caused by a polar air mass that originated over northern Canada. Heathrow Airport cancels flights amid snow forecasts in UK 2017-01-12T05:00:00Z “This particular air mass is quite cold — it’s definitely anomalous, 15 degrees below normal,” Mr. Homenuk told us. New York Today: Wavering Weather 2016-10-27T04:00:00Z “A crisp, cool, fall air mass will move into the city” this weekend, he said. New York Today: An Extended Summer 2016-09-22T04:00:00Z Hailstorms form within a unusually unstable air mass in which the temperature falloff with height is much greater than normal. Samoa hit by hail storm so rare residents thought it was a hoax 2016-09-19T04:00:00Z Firefighters got help from a low air mass from the ocean that brought a spike in humidity and dropped temperatures into the 60s and 70s. Pilot of balloon that crashed, killing 16, allegedly once had a drinking problem 2016-08-01T04:00:00Z Wave clouds typically form when a mountain, island, or even another mass of air forces an air mass to rise, then fall again, in a wave pattern. Satellite Eye on Earth: February 2016 - in pictures 2016-03-14T04:00:00Z The Amazon pulls in Atlantic moisture and then “it gets recycled about five times as the air mass moves to the Andes,” Lovejoy said. The solution to climate change that has nothing to do with cars or coal 2016-02-11T05:00:00Z The coldest air mass of the winter brought the thermometer down to minus-6 degrees overnight in Minneapolis, while New Yorkers were urged to take “extreme precautions” against wind chill. Polar vortex triggers subzero temperatures, 'life-threatening' wind chill 2016-02-13T05:00:00Z The increased ocean surface temperatures influence air and moisture movement around the globe, sending temperatures higher and shifting rain patterns by affecting how winds and air masses circulate air around the planet. Global Temperatures Set Record for Second Straight Year 2016-01-20T05:00:00Z Subzero temperatures are reported statewide Sunday as an arctic air mass grips Minnesota. Minnesota stuck in deep freeze; subzero temperatures reign 2016-01-17T05:00:00Z Low humidity keeps this air mass fairly dry today, too.” The Daily 202: Trump’s Islamophobia may help him in short term but will prove fatal long-term 2015-12-08T05:00:00Z Fitting the mesh will require one hour of work, improving the measuring capability of the engine's air mass sensor which enables more efficient combustion, another spokesman said. VW maintains $7 billion of provisions despite simple emissions fix 2015-11-25T05:00:00Z This kind of layering will bend light rays as they pass from one air mass into the next. Is This Floating City in the Skies Over China Real? 2015-10-20T04:00:00Z A low-pressure system spinning over Point Conception off the Santa Barbara County coast will allow a unstable and moist air mass to linger over the deserts and mountains Friday. 5 Freeway at Grapevine remains closed; more storms, possible mud flows expected 2015-10-16T04:00:00Z "If we get a stable air mass, we are looking at getting smoked-in potentially." Firefighters battle massive blazes from Alaska to drought-hit California 2015-06-19T04:00:00Z The National Weather Service says the combination of a cool air mass and strong winds aloft allowed short-lived funnel clouds to develop over much of eastern New Mexico. Small tornado touches down 5 miles southwest of Roswell 2015-05-05T04:00:00Z One influential theory argued that storms occurred along unstable fault lines between hot and cold air masses, just as we know earthquakes today happen on the boundaries of tectonic plates. The birth of the weather forecast - BBC News 2015-04-29T04:00:00Z “Siberian Express,” the worst two words in the English language, led the pack, followed closely by “frozen air mass” and “Arctic blast.” Spring Is So Close You Can Almost Taste It 2015-03-19T04:00:00Z This pattern tends to develop in a warm sector - the air mass stuck between a warm front and a cold front. What is the Foehn effect? 2015-03-06T05:00:00Z “The arctic air mass we’ve been dealing with means this storm will overachieve,” said Lance Franck, a meteorologist with the National Weather Service office in Mount Holly, New Jersey. Another winter storm hits East Coast; more cold temps coming 2015-02-21T05:00:00Z "The arctic air mass we've been dealing with means this storm will overachieve," said Lance Franck, a meteorologist with the National Weather Service office in Mount Holly, New Jersey. Another winter storm hits East Coast, cold temps coming 2015-02-21T05:00:00Z This particular air mass is not just a polar vortex, but one that started in Russia as a “Siberian express.” D.C. area chafes at the polar vortex’s return (a few deep-freeze deniers aside) 2015-02-19T05:00:00Z An extremely cold air mass is moving into the region on Sunday night. Snow, subzero temps forecast for NYC area 2015-02-14T05:00:00Z Satellite readings from the high tops of clouds associated with the Arctic air mass drifting over four Eastern states showed temperatures at well below zero. Yes, It’s Cold, but the Cloud Tops are Colder 2015-02-14T05:00:00Z After the snow, or lack thereof, and a high of 32 degrees today, an Arctic air mass will pretty definitely bring frigid temperatures on Friday, through at least Tuesday. New York Today: An Uncertain Forecast 2015-01-29T05:00:00Z The pontiff's tour will include a visit to Tacloban to meet survivors of a devastating typhoon that hit the area in 2013 and he will also hold an open air mass on Sunday in Manila. Rapturous Philippines welcome for Pope 2015-01-15T05:00:00Z Dangerously cold arctic air masses and snow were moving across the U.S. on Sunday night, bringing the most bitterly cold temperatures so far this winter. Morning Must Reads: January 5 2015-01-05T05:00:00Z Titan's south pole seems to be losing heat to space more quickly than it is gaining heat from air masses sinking within its atmosphere, de Kok says. Cyanide cloud puts a chill in Titan's air 2014-09-30T04:00:00Z The result was an oversaturated air mass that made for heavy rains in a swath from southeast New Mexico and West Texas through the Austin area and into Houston. Torrential rains have battered West Texas 2014-09-22T04:00:00Z Forecasters said a drier air mass will arrive by Wednesday. More flash-flood worries for Southern California 2014-09-08T04:00:00Z A Canadian air mass may arrive early next week, cooling things down considerably. New York Today: Fashion Week, With a Twist 2014-09-03T04:00:00Z The Met Office said a very warm and humid air mass across the UK would become "increasingly unstable", leading to more intense thunderstorms. In pictures: East Anglia lightning 2014-07-19T04:00:00Z Forecasters said there’s a chance of dry lightning and gusty winds in the Los Angeles area Saturday afternoon as a moist, unstable air mass moves in from the Gulf of Mexico. Chance of dry lightning, gusty winds in Southern California 2014-07-19T04:00:00Z The rains were the result of upper-level moisture from the hurricane’s remnants, combined with a very moist air mass from the Gulf of Mexico in lower levels of the atmosphere. Torrential rains have battered West Texas 2014-09-22T04:00:00Z But Larry Cosgrove, an energy meteorologist, says that while the looming cool air mass is “admittedly impressive”, calling it a polar vortex is hogwash. Poor man’s polar vortex to make shocking summer return in eastern U.S. next week “The air masses at night tend to be pretty stable, so you’ve got a lot of people who are living not even downwind from these sites necessarily, but downslope.” Air Pollution Spikes In Homes Near Fracking Wells 2014-06-26T04:00:00Z All in a day’s work for April — it’s both the second-wettest month and the peak of fire season, thanks to lots of dry air masses and fast-moving storms. City Room: New York Today: Moving Verses 2014-04-25T09:56:41Z This requires some important assumptions and computation, including the issue of “back tracking” air masses, both horizontally and vertically. Dot Earth Blog: A Deeper Look at a Study Finding High Leak Rates From Gas Drilling 2014-04-23T17:59:17Z Winglets essentially reduce the size of those whirling air masses and improve the plane's "gas mileage" by helping jets more efficiently slice through the sky. United seeks big saving in little winglets 2014-03-04T06:00:00Z In addition to bringing cold, the air mass can push the jet stream—the band of wind that typically flows from the Pacific Ocean across the U.S.—much further south as well. What Is This Polar Vortex That Is Freezing the U.S.? 2014-01-06T21:15:04.248Z Polar jet streams are fast flowing rivers of wind positioned high in the Earth’s atmosphere that push cold and warm air masses around, playing a critical role in determining the weather of our planet. “The Great Dying” redux? Shocking parallels between ancient mass extinction and climate change 2013-12-17T15:53:00Z Summer temperatures over Greenland were about 1 to 2 degrees Celsius cooler than last year, partially because the diversion of warm air masses spurred cooler and cloudier weather than normal. Arctic Report Card: Failing to Stop Warming 2013-12-13T16:15:07.206Z Meanwhile, an Arctic air mass was expected to chill much of the Central Plains and the East Coast through Monday, the advisory said, with wind-chill temperatures dropping into the single digits overnight in some places. Freezing weather spreads as storm heads toward U.S. East Coast 2013-11-25T03:30:54Z Britain is under an area where five main air masses meet. Is the British weather unique in the world? 2013-10-08T02:20:49Z A tropical air mass—unusual in the dry Rocky Mountains—is slowly being hauled across the Front Range by weak southwesterly winds. Colorado: What Caused the 30 Year Flood 2013-09-17T10:50:22Z As it rises, it cools and the moisture content in it starts to condense as the air mass drops below its dew point. Bigger, Badder Storms: Climate Change Could Lead to More Violent Hurricanes 2013-07-09T22:05:24Z The sun imparted energy into the air masses constantly, but only some of it became kinetic energy. We tried to weaponize the weather 2013-04-27T19:00:00Z "It's a clash of air masses going on," Gerard said, adding that forecasts call for large hail in western Kansas. Possible Kansas twisters, hail predicted for Monday evening 2013-04-08T20:05:36Z An air mass is a large body of air that has similar temperature and moisture properties throughout. Is the British weather unique in the world? 2013-10-08T02:20:49Z “The air mass over the inland is still heating up — it hasn’t peaked,” he told the Sydney Morning Herald. Too Hot to Pump Gas: Australia's Record-Breaking Heat Wave 2013-01-09T23:35:31Z Dee said the cold air mass was moving into the Midwest and roughly the northern two-thirds of the crop region will experience freezing to below-freezing temperatures early Sunday and Monday mornings. First major U.S. snowstorm, cold snap may harm some crops 2012-10-04T14:24:43Z The study authors based their analysis on a combination of satellite observations of rainfall and vegetation and an atmospheric circulation model to track the movement of air masses. Cutting Down Rainforests Also Cuts Down on Rainfall 2012-09-06T15:15:05.223Z They are, in essence, large air masses descending from the ice sheet. Scientist at Work Blog: Ecological Connectivity as Climate Warms 2012-01-20T16:58:32Z The air masses fight it out and the one that wins dictates the weather. Is the British weather unique in the world? 2013-10-08T02:20:49Z “We know the air mass is hot enough to challenge the Oodnadatta record.” Too Hot to Pump Gas: Australia's Record-Breaking Heat Wave 2013-01-09T23:35:31Z It may be, in fact, communicated by conduction to the metallic masses of the bearings, and thence, by conduction and radiation, to the air masses surrounding the apparatus. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z The oscillation helps determine the placement of Arctic air masses, and it influences how they move. Siberian snowfall may help improve U.S. weather forecasts, meteorologist says 2011-11-28T15:24:04Z Cyclone is simply the generic name for a large rotating air mass. Wind and Weather 2011-11-23T03:00:57.717Z There is a sixth air mass, the returning Polar Maritime, which is a variation of the Polar Maritime. Is the British weather unique in the world? 2013-10-08T02:20:49Z The evidence adduced from the present study gives support to the hypothesis that the continental pattern of spring migration in eastern North America is regulated by the movement of air masses. A Quantitative Study of the Nocturnal Migration of Birds. Vol.3 No.2 2011-11-02T02:00:14.587Z Of the energy operating in them we do not propose to say anything further at this stage, except that it is largely communicated to the atmospheric air masses. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z The breeding distributions of some species of birds fairly closely approximate the distribution of these warm air masses; these examples are noted where appropriate below. The Breeding Birds of Kansas 2011-08-27T02:00:24.797Z Besides those who have pinned their faith to the thicknesses, there are those who take up with the "air mass" theory. Antonio Stradivari 2011-06-28T02:00:11.050Z Another factor may be warmer temperatures in the Gulf of Mexico, which helped contribute to a warm and muggy air mass in the south, Paquette said. La Nina weather pattern may be factor in more tornadoes 2011-05-23T20:34:37Z "Miss Muggins," says he, "you'll obleege me by dropping that air mass of brass buttons and moustaches, and dancing with me." The Orpheus C. Kerr Papers, Series 1 2011-04-21T02:00:47.647Z Compared with the oil, the air masses offer only a slight resistance to the motion, and thus only an exceedingly small part of the pendulum's energy is transmitted to them. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z The mixing is brought about by the slow motion of air masses, and this slow motion is probably essential to the phenomenon. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5 "Fleury, Claude" to "Foraker" 2011-04-03T02:00:20.883Z In his theory, the extra snow is creating a dense, cold air mass over northern Asia in the late autumn, setting off a complex chain of cause and effect that ultimately perturbs the vortex. Topsy-Turvy Weather: U.S. Is Frigid, Arctic Balmy 2011-01-24T14:35:36Z The storm was likely to roll across the Midwest and South, hitting the Atlantic Coast on Monday and Tuesday, where it will encounter the frigid air mass, he wrote on the AccuWeather.com web site. Snow covers New England, bitter cold in Midwest 2011-01-21T21:31:44Z The katabatics will keep up until the cold air mass dissipates, or until there is a countervailing push from the ice shelf side of the mountains. Scientist at Work: Katabatic Winds of Antarctica 2010-12-15T22:12:18Z The final result of the pendulum's motion would therefore be the same in this case as in air; the heat energy would, when communicated to the surrounding air masses, cause an expansive movement against gravity. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z "An arctic air mass will continue to move into the region," the NWS office in Tampa, Florida, said. NY juice sets 3-1/2-year high on Florida freeze fears 2010-12-13T14:24:00Z For instance, the report describes an incident from 2004 when a polluted air mass was detected at Mount Bachelor Observatory in Oregon eight days after it left East Asia. SCIENCE NEWS 2009-11-10T05:00:00Z As the air mass descends, it disperses outward in different directions. Survivable plane crashes are not miracles 2010-08-16T19:30:00Z The Church has asked them to put at least £1m in Sunday's collection - largely to pay for three big open air masses at which the Pope will preside. Catholics asked to fund Pope trip 2010-05-23T00:07:00Z In this machine, therefore, the energy of position possessed by the air masses is, in their descent to their original positions at lower levels, transformed once more into axial or rotational energy. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z "With the tremendous velocities of the air masses at those heights, one projector should be able to process hundreds of tons of atmosphere per day." The Year When Stardust Fell Momentarily the flying car rocked under the buffeting of the disturbed air masses, then it steadied down again. The Golden Amazons of Venus The lowlands and the lower mountains of the south have a Mediterranean climate; weather in the northern and eastern highlands is dominated by the continental air masses that persist over central and Eastern Europe. Area Handbook for Albania He teamed up with a meteorologist to explain the distribution of rainfall in spite of lack of frigid and torrid air masses. Eight Keys to Eden The energy then, originally drawn from the rotational energy of the earth, has thus worked through the pendulum machine, and is now stored in the air masses in this form of energy of position. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z The dome slid open, showing the flicker of the auroras, where areas of intense heat and cold set up atmospheric tension by p. 62 rapid fluctuation of adjoining air masses. A World is Born The scanner, Lanko had explained, picked up ghost images from heated air masses, or from clouds, but it discriminated against them, refusing to form a definite image unless a material body came within range. The Players Cold winter temperatures in the mountains result from the continental air masses that predominate over Eastern Europe and the Balkans. Area Handbook for Albania The problem of the moving air mass, however, is more complicated than it looks. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 The descent of the atmospheric air masses in their movement towards regions of low velocity, and the return in the descent of the initially transformed axial energy to its original form. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z The circumstances will then favour a direct or more or less vertical return of the energy of the air masses in the neighbourhood of these regions. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z The passage or flow of the atmospheric air masses over the earth's surface is a movement of an exceedingly complex nature, impossible to illustrate by experimental apparatus. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z The average precipitation over the country is high resulting from the convergence of the prevailing airflow from the Mediterranean with the continental air mass. Area Handbook for Albania The continuous abstraction of axial energy by the aqueous vapour is balanced by an equally continuous return from the air masses, and the system, so far as its energy properties are concerned, is absolutely conservative. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z It is this energy which is finally transmitted to the atmospheric air masses. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z The low temperature of evaporation of these air masses ensures their permanency in the gaseous state. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z We cannot say how the steam transmits its work energy by the moving piston, nor yet by what agency the elevated particles of aqueous material transmit their energy to the air masses. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z Arriving at that line, the Mediterranean air meets increasing ground elevations that force it to rise and an air mass that tends to resist its further progress. Area Handbook for Albania But on the other hand, the replacing air masses, which are travelling in the opposite direction from poles to equator, must gain or absorb a corresponding amount of energy. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z Thus, in virtue of its peculiar physical properties, it forms an admirable agent for the storage of energy and for its transmission to the surrounding air masses. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z These conditions, however, favour in every respect the circulatory motion of the highly energised upper air masses towards regions of low velocity. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z All circumstances combine, in fact, to confine the more powerfully energised and highly mobile air masses to high altitudes. The Energy System of Matter A Deduction from Terrestrial Energy Phenomena 2011-12-21T03:00:36.570Z When there is a dominant continental air mass, it spills cold air onto the lowland areas. Area Handbook for Albania |
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