Attribution of East Asian Climate at the Last Glacial Maximum

详细信息   

• 责任者：Jiang Dabang (Institute of Atmospheric Physics ; Chinese Academy of Sciences ; Beijing 100029 ; China) ; Liang Xiaoyun
• 刊名：Quaternary Sciences
• 出版年：2008
• 卷期：28(3)
• 关键词：全新世 ; Holocene ; 气候 ; climate ; 东亚 ; Eastern Asia
• 页码：p.491-501
• 图表：6 illus., 2 tables, 49 refs.
• 分类号：1400
• issnNo：ISSN1001-7410
• isbnNo：CN11-2708/P

摘要

///According to the protocol of the phase one of the Paleoclimate Modelling Intercomparion Project (PMIP), a global atmospheric general circulation model developed at the Institute of Atmospheric Physics under the Chinese Academy of Sciences (IAP-AGCM) was used to simulate East Asian climate at the Last Glacial Maximum (LGM), about 21,000 calendar years ago. Four sensitivity experiments were then performed to evaluate the individual climate effect of atmospheric CO^₂ concentration, sea surface temperature (SST) and sea ice, continental ice sheet and topography, and East Asian vegetation, respectively. It displays that glacial surface air temperature reduced strikingly over China, except for parts of South China. The surface cooling is generally featured by a larger magnitude towards high latitudes and a cooling maximum over the Tibetan Plateau. Attribution analysis reveals that the changes in SST and sea ice are mostly responsible for slight surface warming over parts of South China. They also cause notable surface cooling in the rest of East Asia, especially Northeast Asia. The changes in continental ice sheet and topography can give rise to surface cooling over northwestern East Asia. A uniform surface cooling of 0.2~0.9℃ in East Asia is induced by atmospheric CO2 concentration change. A statistically significant surface cooling due to East Asian vegetation change is only registered in China in south of about 40°N, with values of -0.5℃ to -1℃.