Equatorward shift of the subarctic boundary in the northwestern Pacific during the last deglaciation
We have generated a high-resolution record of alkenone sea surface temperature (SST) between 10-24 ka from Core MD01-2421 off central Japan, in the northwestern Pacific. The cooling by 5 degrees C from 21 ka to 12.8 ka implies the equatorward shift of the subarctic boundary in the northwestern Pacific by similar to 2.8 degrees in latitude. This shift was a result of the stronger summer Okhotsk High. The Okhotsk High was likely enhanced by the combined effects of El Nino-like conditions in the tropical Pacific and the heating of the land surface of northeastern Siberia.
Yamamoto M, Suemune R, Oba T (2005). Equatorward shift of the subarctic boundary in the northwestern Pacific during the last deglaciation. Geophysical Research Letters. 32 (L05609). 1-4. https://doi.org/10.1029/2004GL021903, https://archimer.ifremer.fr/doc/00230/34087/
