Browsing All Posts published on »September 22nd, 2009«

Oxygen isotope proxy errors corrected in Greenland ice cores

September 22, 2009

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Scientists, mariners, and weather hobbyists started directly measuring temperature with thermometers globally in the late 1800s. When modern climatologists want temperature data farther back in time than those first global measurements, they have to use things called “proxies.” A proxy for temperature is something that, when calibrated properly, indirectly measures temperature. The most common proxies […]