Tele-connections between East Asian Monsoon and the High-latitude Climate
Tele-connections between East Asian Monsoon and the High-latitude Climate
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DOI：
10.4116/jaqua.37.211
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发表时间：
1998-07
期刊：
影响因子：
--
通讯作者：
Luejiang Wang;T. Oba
中科院分区：
文献类型：
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作者：
Luejiang Wang;T. Oba
根据日本海和南海高分辨率海洋沉积物记录，与GISP 2冰芯记录的对比表明，末次冰期东亚中低纬季风气候与格陵兰高纬季风气候之间存在着遥相关。Dansgaard-Oeschger事件的暖期与季风降水增加导致华南和华东地区降水过多的时期相关，从而导致南海海面盐度降低，与日本海淡水盖减少垂直通风导致的暗色层积沉积层的发展相关。这种远程连接的可能联系被认为是西风和西南至东南夏季季风之间的平衡。每当高纬度极地格陵兰岛变暖时，西风的强度和/或范围就会减少。夏季，由于高纬度地区的暖化，中高纬度地区的低压环流增强，海陆气压对比增强，季风环流在东亚地区达到高潮。
Based on the high resolution marine sediment records from the Japan and the South China Seas, a comparison to the GISP 2 ice core record suggests a climatic tele-connections between the low-to-mid latitude East Asian Monsoon climate and that over the high latitude Greenland during the last glacial period. Episodic warm periods of Dansgaard-Oeschger events are correlated to the periods when increased monsoon precipitation caused excess of rainfall in South and East China, hence the decrease in sea surface salinity in the South China Sea, and to the development of the dark laminated sediment layers due to the reduced vertical ventilation by a fresh water lid in the Japan Sea. The possible link in this tele-connection is believed to be a counterbalance between the westerly and the southwest-to-southeast summer monsoon wind. Whenever the high latitude polar Greenland was warmed up, the westerly would have reduced in its strength and/or extension. Consequently, the monsoon circulation culminated in the East Asia due to the increased land-sea pressure contrast during summer, when the low pressure cell over mid-high latitude land areas was intensified due to the high-latitude warming.