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Polar see-saw : ウィキペディア英語版 | Polar see-saw
The polar see-saw (also: ''Bipolar seesaw'') is the phenomenon that temperature changes in the northern and southern hemispheres may be out of phase. The theory (or hypothesis) states that large changes, f.e. when the glaciers are intensely growing or depleting, in the formation of ocean bottom water in both poles take a long time to exert their effect in the other hemisphere. Estimates of the period of delay vary, one typical estimate is 1500 years. This is usually studied in the context of ice-cores taken from Antarctica and Greenland. == See also ==
*Polar amplification
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