Seasonally specific responses of the East Asian monsoon to deglacial climate changes
Seasonally specific responses of the East Asian monsoon to deglacial climate changes
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DOI：
10.1130/g21764a.1
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发表时间：
2006-07-01
期刊：
影响因子：
5.8
通讯作者：
Gotanda, Katsuya
中科院分区：
文献类型：
--
作者：
Nakagawa, Takeshi;Tarasov, Pavel E.;Gotanda, Katsuya
北大西洋的冰川融水脉冲引发了新仙女木事件，也促使了东亚季风区的气候变冷，如日本和中国沿海中纬度地区。然而，人们对将北大西洋的变化传递到远东的机制知之甚少。在这里，我们表明，关闭北大西洋温盐环流带来了显着降低温度和更高的降水量在日本的冬季，而在日本的夏季气候的变化是相当小的。冬季西伯利亚气团的冷却似乎导致西伯利亚和西太平洋之间的气压梯度增加，从而加强了冬季风。蒙古高压系统和西风急流在这次遥相关中起了重要作用。相比之下，在西太平洋的晚冰期间冰期（GI-1; Bolling-Allerod）的开始变暖没有季节特异性的功能，这意味着这个变暖事件的主要驱动机制可能在于一个泛半球或全球性的因素，如日照变化。
The deglacial meltwater pulse in the North Atlantic that induced the Younger Dryas event also prompted climate cooling in East Asian monsoon regions such as Japan and coastal mid-latitude China. However, very little is understood about the mechanism that can transmit changes in the North Atlantic to the Far East. Here we show that the shutdown of the North Atlantic thermohalline circulation brought about significantly lower temperatures and higher precipitation in the Japanese winter, whereas the change in the Japanese summer climate was considerably smaller. The cooling of the Siberian air mass seems to have caused an increased pressure gradient between Siberia and the West Pacific in winter, intensifying the winter monsoon. The Mongolian high-pressure system and the westerly jet stream played an important role in the teleconnection. In contrast, the warming at the onset of the late glacial interstadial (GI-1; Bolling-Allerod) in the West Pacific did not have season-specific features, implying that the principal driving mechanism of this warming event may lie in a pan-hemispheric or global factor, such as insolation changes.