Equatorward shift of the subarctic boundary in the northwestern Pacific during the last deglaciation
Equatorward shift of the subarctic boundary in the northwestern Pacific during the last deglaciation
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DOI：
10.1029/2004gl021903
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发表时间：
2005-03
影响因子：
5.2
通讯作者：
Masanobu Yamamoto;Ryutaro Suemune;T. Oba
中科院分区：
文献类型：
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作者：
Masanobu Yamamoto;Ryutaro Suemune;T. Oba
我们已经从日本中部的MD 01 - 2421岩芯中获得了10-24 ka之间的高分辨率烯酮海表温度（SST）记录。从21 ka到12.8 ka，温度降低了5°C，这意味着西北太平洋的副北极边界向赤道方向移动了12.8 °。这一转变是夏季鄂霍次克高压较强的结果。鄂霍次克高压可能是由于热带太平洋的厄尔尼诺现象和西伯利亚东北部陆地表面加热的综合影响而增强的。
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°C from 21 ka to 12.8 ka implies the equatorward shift of the subarctic boundary in the northwestern Pacific by ∼2.8° 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 Niño‐like conditions in the tropical Pacific and the heating of the land surface of northeastern Siberia.