Climate data
Another measure of climate change is the amount of Arctic sea ice measured at its minimum extent (in September). Arctic sea ice minimum has dropped from around 7 million square kilometers to well under 5 million.
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@petergleick Conscious you've likely seen it already, but this research on the Greenland ice sheets from last year really drilled it home for me: https://www.nature.com/articles/s41558-022-01441-2#article-info
