气候变化领域集成服务门户(CCPortal): Large-scale atmospheric circulation influences the ice core d-excess record from the central Tibetan Plateau

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DOI	10.1007/s00382-021-05779-9
	Large-scale atmospheric circulation influences the ice core d-excess record from the central Tibetan Plateau
	Shao, Lili; Tian, Lide; Cai, Zhongyin; Wang, Cheng; Li, Yao
通讯作者	Tian, LD (通讯作者)
发表日期	2021
ISSN	0930-7575
EISSN	1432-0894
起始页码	1805
结束页码	1816
卷号	57 期号:7-8
英文摘要	Deuterium excess (d-excess), as a secondary parameter of water stable isotopes, inherits the meteorological information from moisture source to the site of interest. Understanding the climatic implications of d-excess in ice cores from the Tibetan Plateau (TP) is critical for reconstructing the paleoclimate. Here we present an annually-dated ice core record retrieved from the central TP and analyze the correlations between the ice core d-excess record and local and regional climate variables in the past decades (1948-2011). Our results show poor correlations between d-excess and local meteorological parameters, deemphasizing the local control on the interannual variations in d-excess records. However, significant correlations exist between the d-excess record and the relative humidity over the eastern Arabian Sea and Bay of Bengal. In addition, our results indicate that d-excess is positively correlated with temperature in the Nino 3.4 region, demonstrating that large-scale atmospheric circulation through ENSO cycle affecting the interannual d-excess signal in ice cores from the central TP. Mechanically speaking, in annual scale, the higher (lower) temperature that occurs in the eastern tropical Pacific Ocean in El Nino (La Nina) years is accompanied by the ascending branch of the Walker circulation weakening (enhancing) in the Indian Ocean region, leading to lower (higher) relative humidity value in the moisture source regions of the Arabian Sea and Bay of Bengal, and subsequently producing higher (lower) d-excess value in the central Tibetan ice core records. This finding will enhance the understanding of the climatic significance of ice core d-excess in the Asian monsoon region.
关键词	ASIAN SUMMER MONSOON DEUTERIUM-EXCESS WATER-VAPOR RELATIVE-HUMIDITY ENSO VARIABILITY STABLE-ISOTOPES PRECIPITATION SOUTH TEMPERATURE CONVECTION
英文关键词	Ice core d-excess; Central Tibetan Plateau; Relative humidity; El Nino Southern Oscillation; Nino 3.4
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000645485900001
来源期刊	CLIMATE DYNAMICS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260398
推荐引用方式 GB/T 7714	Shao, Lili,Tian, Lide,Cai, Zhongyin,et al. Large-scale atmospheric circulation influences the ice core d-excess record from the central Tibetan Plateau[J]. 中国科学院青藏高原研究所,2021,57(7-8).
APA	Shao, Lili,Tian, Lide,Cai, Zhongyin,Wang, Cheng,&Li, Yao.(2021).Large-scale atmospheric circulation influences the ice core d-excess record from the central Tibetan Plateau.CLIMATE DYNAMICS,57(7-8).
MLA	Shao, Lili,et al."Large-scale atmospheric circulation influences the ice core d-excess record from the central Tibetan Plateau".CLIMATE DYNAMICS 57.7-8(2021).