Analysis of 2,000 Years of Climate Records Finds Global Cooling Trend Ended in the 19th Century- All Images

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News Release 13-072

Analysis of 2,000 Years of Climate Records Finds Global Cooling Trend Ended in the 19th Century

20th-century warming, researchers say, "reversed" the trend

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Student researchers in a boat use acoustic imaging to select a lake site

Students use acoustic imaging to select a coring site at a lake in southern Alaska.

Credit: Darrell S. Kaufmann, Northern Arizona University

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Female gradute student examines lake sediment core from southern Alaska

Examination of lake sediment core from southern Alaska shows intricate layering indicating environmental and climatic changes over centuries.

Credit: Darrell S. Kaufman, Northern Arizona University

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