气候变化领域集成服务门户(CCPortal): An emerging impact of Eurasian spring snow cover on summer rainfall in Eastern China

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DOI	10.1088/1748-9326/abf688
	An emerging impact of Eurasian spring snow cover on summer rainfall in Eastern China
	Zhang, Taotao; Wang, Tao; Feng, Yingying; Li, Xichen; Krinner, Gerhard
通讯作者	Wang, T (通讯作者)
发表日期	2021
ISSN	1748-9326
卷号	16 期号:5
英文摘要	Eurasian spring snow cover is widely considered as an important predictor of Asian summer monsoon rainfall, but its possible role in the formation of the north-south dipole structure of rainfall anomalies (NSDR)-a major mode of the eastern China summer rainfall variability-remains elusive. Here, we show that, there is a close connection between the western Eurasian spring snow cover (WESS) and NSDR during our research period 1967-2018, with less WESS tends to be accompanied by a wetter south-drier north pattern over eastern China, and vice versa. However, this relationship was not significant before the late 1990s, but has since become significant. Further analyses demonstrate that the shift in the WESS-NSDR relationship could be attributed to the modulation of summer North Atlantic Oscillation (SNAO). After the late 1990s, the WESS-related anomalous atmospheric circulations during summer are largely reinforced by the constructive superposition of those with same signs induced by SNAO, which in turn would intensify the impact of WESS and hence lead to a strong WESS-NSDR connection. In contrast, the influences of WESS are counteracted by those with opposite signs associated with SNAO before the late 1990s and thereby result in a weak snow-rainfall relationship. Our findings, along with the decline in Eurasian spring snow cover, provide a potential explanation for the recent 'South Flood-North Drought' pattern observed over eastern China.
关键词	NORTH-ATLANTIC OSCILLATION WAVE-ACTIVITY FLUX TIBETAN PLATEAU MONSOON RAINFALL HEAT-SOURCE PART I VARIABILITY CLIMATE WESTERN TRENDS
英文关键词	Eurasian snow cover; Eastern China summer rainfall; summer North Atlantic Oscillation; emerging impact
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000642203400001
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
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/260412
推荐引用方式 GB/T 7714	Zhang, Taotao,Wang, Tao,Feng, Yingying,et al. An emerging impact of Eurasian spring snow cover on summer rainfall in Eastern China[J]. 中国科学院青藏高原研究所,2021,16(5).
APA	Zhang, Taotao,Wang, Tao,Feng, Yingying,Li, Xichen,&Krinner, Gerhard.(2021).An emerging impact of Eurasian spring snow cover on summer rainfall in Eastern China.ENVIRONMENTAL RESEARCH LETTERS,16(5).
MLA	Zhang, Taotao,et al."An emerging impact of Eurasian spring snow cover on summer rainfall in Eastern China".ENVIRONMENTAL RESEARCH LETTERS 16.5(2021).