Sea Surface Temperatures, Past and Future (IMAGE)
Caption
The left panel shows the sea surface temperature map during the most recent ice age, 21,000 years ago, compared to modern preindustrial temperatures. This new, more detailed analysis shows that the strong cooling over the northern oceans, caused by the North American ice sheet, contributed substantially to total global cooling. The right panel shows that the warming of the ocean’s surface expected under future doubling of atmospheric CO2 displays a different pattern of temperature change, with a lower expectation for globally averaged warming than previous worst-case estimates.
Credit
Cooper et al./Science Advances
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