The disappearance of plant life would radically reduce the atmospheric concentration of oxygen and greatly increase that of carbon.

植物的消失将从根本上降低大气中氧气的浓度，并大大增加大气中碳的浓度。

Over there is the place where we measure the planet's atmospheric carbon dioxide concentration.

那边是我们测量地球大气中二氧化碳浓度的地方。

This measures the amount of warming that can eventually be expected to follow a doubling in the atmospheric concentration of carbon dioxide.

该指标表示预计大气中二氧化碳浓度翻倍所能引致的升温量。

From looking at the cores, scientists can tell what kinds of marine organisms were around, and use them to estimate things like temperature and atmospheric CO2 concentration.

通过观察核心，科学家们可以判断周围有哪些海洋生物， 并用它们来估计温度和大气中的二氧化碳浓度等。