气候变化领域集成服务门户(CCPortal): Variations in annual accumulation recorded in a Laohugou ice core from the northeastern Tibetan Plateau and their relationship with atmospheric circulation

CCPortal

DOI	10.1007/s12665-016-5601-x
	Variations in annual accumulation recorded in a Laohugou ice core from the northeastern Tibetan Plateau and their relationship with atmospheric circulation
	Du, Wentao; Qin, Xiang; Kang, Shichang; Cui, Xiaoqing; Sun, Weijun
发表日期	2016
ISSN	1866-6280
EISSN	1866-6299
卷号	75 期号:9
英文摘要	Annual accumulation was reconstructed for a period from 1960 to 2006 using a 21.2-m ice core from the firn basin of Laohugou (LHG) Glacier No. 12 on the northeastern Tibetan Plateau (TP). Significant periodicity of LHG accumulation variations was identified as a quasi-3-year period in accordance with the oscillation of precipitation in the northwestern China, especially the Hexi Corridor. Furthermore, the relationships of LHG accumulation with atmospheric circulation and moisture sources were investigated. LHG accumulation was positively correlated with the 500-hPa geopotential height and pressure in Central Asia, as well as the autumn Northern Atlantic Oscillation, suggesting that the Westerlies may transport moisture to the LHG region and enhance precipitation. In addition, a negative relationship between LHG accumulation and meridional wind indicated that an intense Mongolian cyclone caused by a strong meridional wind in the region could block Arctic air masses from the LHG region. Moisture fluxes and backward air mass trajectories suggested that moisture might originate from Central Asia, Southern and the inland TP. The relationship between LHG accumulation and atmospheric circulation provides an opportunity to reconstruct the history of atmospheric circulation using a deep ice core record.
关键词	Annual accumulation Atmospheric circulation Moisture flux Ice core Northeastern Tibetan Plateau
学科领域	Environmental Sciences & Ecology; Geology; Water Resources
语种	英语
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
来源期刊	ENVIRONMENTAL EARTH SCIENCES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111847
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, Qilian Shan Stn Glaciol & Ecol Environm, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Du, Wentao,Qin, Xiang,Kang, Shichang,et al. Variations in annual accumulation recorded in a Laohugou ice core from the northeastern Tibetan Plateau and their relationship with atmospheric circulation[J]. 中国科学院西北生态环境资源研究院,2016,75(9).
APA	Du, Wentao,Qin, Xiang,Kang, Shichang,Cui, Xiaoqing,&Sun, Weijun.(2016).Variations in annual accumulation recorded in a Laohugou ice core from the northeastern Tibetan Plateau and their relationship with atmospheric circulation.ENVIRONMENTAL EARTH SCIENCES,75(9).
MLA	Du, Wentao,et al."Variations in annual accumulation recorded in a Laohugou ice core from the northeastern Tibetan Plateau and their relationship with atmospheric circulation".ENVIRONMENTAL EARTH SCIENCES 75.9(2016).