Polar see-saw

Thepolar see-saw(also:bipolar seesaw) is the phenomenon that temperature changes in the northern and southern hemispheres may be out of phase. The hypothesis states that large changes, for example 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 1,500 years. This is usually studied in the context ofice corestaken fromAntarcticaandGreenland.

The warming during theYounger Dryasis out of phase between the two hemispheres.

See also

• Polar amplification
• Climate of the Arctic
• Climate of Antarctica

References

• Severinghaus, Jeffrey P. (26 February 2009). "Climate change: Southern see-saw seen".Nature.457(7233): 1093–4.Bibcode:2009Natur.457.1093S.doi:10.1038/4571093a.PMID19242465.S2CID41641.
• Chylek, Petr; Folland, C.K.; Lesins, G.; Dubey, M.K. (2010)."Twentieth century bipolar seesaw of the Arctic and Antarctic surface air temperatures".Geophysical Research Letters.37(8): L08703.Bibcode:2010GeoRL..37.8703C.doi:10.1029/2010GL042793.S2CID18491097.
• Jung, Simon J.A.; et al. (April 2010)."Southern Hemisphere intermediate water formation and the bi-polar seesaw"(PDF).PAGES News.18(1): 36–38.doi:10.22498/pages.18.1.36.