Climate Proxies main content.

Climate Proxies

Part of Hall of Planet Earth.

Climate proxies section of the Hall of Planet Earth AMNH/D. Finnin

Studying Past Climate

How do we know how climate changed in the distant past? One way is by taking samples of sediment from the bottom of lakes and oceans, where dust, pollen and shells accumulate in fine layers over millions of years. Sediment cores, along with rocks, organisms and even large landforms can contain clues to the way climate has shaped Earth.