气候变化领域集成服务门户(CCPortal): 青藏高原南部冰芯记录与大气环流的关系

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	青藏高原南部冰芯记录与大气环流的关系
其他题名	RELATIONSHIPS BETWEEN AN ICE CORE RECORDS FROM SOUTHERN TIBETAN PLATEAU AND ATMOSPHERIC CIRCULATION OVER ASIA
	康世昌; 秦大河; 任贾文; 侯书贵; 张东启; 张拥军
发表日期	2006
ISSN	1001-7410
卷号	26 期号:2 页码:153-164
中文摘要	通过念青唐古拉峰拉弄冰川垭口处（30°24′30N，90°34′12E；海拔5850m）长度为29．5m的冰芯记录，恢复了1952-1998年间大气降水deltaD和净积累量的时间变化序列。上述两组序列与NCEP／NCAR气候资料的相关分析表明：deltaD和净积累量与中亚冬季的气压、南亚和青藏高原冬季、夏季的位势高度关系密切。中亚地区冬季气压的升高以及冬、夏季南亚和青藏高原位势高度的异常增强了印度夏季风，导致了念青唐古拉峰地区20世纪80年代以来降水量的增多和降水中deltaD值的降低。根据念青唐古拉冰芯deltaD和净积累量记录及其与亚洲地区大气环流的关系，可以通过青藏高原南部较长的冰芯记录来恢复过去该地区大气环流变化的历史。
英文摘要	Hydrogen isotope （deltaD） and annual accumulation records reconstructed using a 29.5m ice core from the col of the Lanong covering the period A. Glacier （5850m a. s. 1. ） D. 1952 - 1998 were on the eastern saddle of Mt. Nyainq6ntanglha （NQ）, Southern Tibetan Plateau （TP）. Using NCEP/NCAR Reanalysis data, we explore the relationships between the annual deltaD and accumulation records from the ice core and primary components of the climate system. Linear correlation analysis between deltaD and climate components indicates that deltaD variations are correlated with summer precipitation, winter surface pressure, and geopotential height in both winter and summer over the South Asian and TP region. Summer precipitation and deltaD are negatively correlated over regions of northern India and the Bay of Bengal, while a positive correlation exists over the north of TP. This is consistent with the amount effect controlling deltaD values during the summer monsoon season. A negative relationship between deltaD and winter surface pressure over central Asia suggests that high pressure acts as a barrier against winter moisture transport with higher deltaD values from the Westerlies. Negative correlations between deltaD and geopotential height in both summer and winter over Asia indicate that stronger atmospheric circulation over Asia corresponds to lower deltaD values. Linear correlation analysis between annual accumulation and climate components for the 47 year overlap periods indicates that annual accumulation variations are closely correlated with sea surface and 500hPa air temperature over the North Indian Ocean and atmospheric circulation （surface pressure and geopotential height） over Asia. An Intensification of atmospheric circulation and increase of sea surface and air temperatures, resulting in intensified moisture availability and moisture transport, have been a major cause for the increase of ice core accumulation over the Mt. NQ region since the 1980s. Associations between atmospheric circulation and the NQ deltaD and accumulation records found in this study can be applied to future studies utilizing longer ice core records to reconstruct atmospheric circulation farther back in time.
关键词	冰芯记录大气环流青藏高原南部
英文关键词	ice core records;atmospheric circulation;Southern Tibetan Plateau
语种	中文
来源期刊	第四纪研究
来源机构	中国科学院西北资源环境生态研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/89728
推荐引用方式 GB/T 7714	康世昌,秦大河,任贾文,等. 青藏高原南部冰芯记录与大气环流的关系[J]. 中国科学院西北资源环境生态研究院,2006,26(2):153-164.
APA	康世昌,秦大河,任贾文,侯书贵,张东启,&张拥军.(2006).青藏高原南部冰芯记录与大气环流的关系.第四纪研究,26(2),153-164.
MLA	康世昌,et al."青藏高原南部冰芯记录与大气环流的关系".第四纪研究 26.2(2006):153-164.