气候变化领域集成服务门户(CCPortal): A bridging role of winter snow over Northern China and Southern Mongolia in linking the east Asian winter and summer monsoons

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DOI	10.1175/JCLI-D-20-0298.1
	A bridging role of winter snow over Northern China and Southern Mongolia in linking the east Asian winter and summer monsoons
	Lu M.; Kuang Z.; Yang S.; Li Z.; Fan H.
发表日期	2020
ISSN	0894-8755
起始页码	9849
结束页码	9862
卷号	33 期号:22
英文摘要	Eurasian snow, one of the most important factors that influence the Asian monsoons, has long been viewed as a useful predictor for seasonal monsoon prediction. In this study, observations and model simulations are used to demonstrate a bridging role of the winter snow anomaly over northern China and southern Mongolia (NCSM) in the relationship between the East Asian winter monsoon (EAWM) and the East Asian summer monsoon (EASM). Enhanced snow in NCSM results in local surface and tropospheric cooling, strengthening the EAWM through cold-air intrusion induced by northerly wind anomalies. In turn, the stronger EAWM provides a favorable condition for enhanced snowfall over East Asia to the south, indicating an active snow–EAWM interaction. The continental cooling could be maintained until summer due to the memory effect of snowmelt and moistening as well as the snow–monsoon interaction in the spring, causing changes in the meridional temperature gradient and associated upper-level westerlies in the summer. The interaction between the strengthened westerlies over the northern Tibetan Plateau and the topography of the plateau could lead to anomalous downstream convergence and compensating divergence to the south. Therefore, anomalous cyclonic circulation and increased rainfall occur over northeastern China and the Korean Peninsula, but anticyclonic circulation and decreased rainfall appear over the subtropical East Asia–Pacific region. Moreover, limited analysis shows that, compared to sea surface temperature feedback, the direct impact of snow anomaly on the EAWM–EASM connection seems more important. © 2020 American Meteorological Society.
英文关键词	Atmospheric thermodynamics; Oceanography; Rain; Surface waters; Topography; Anticyclonic circulation; Cyclonic circulation; East Asian summer monsoon; East Asian winter monsoon; Favorable conditions; Meridional temperature gradient; Northern Tibetan plateaux; Sea surface temperature (SST); Snow; anticyclone; climate change; monsoon; summer; weather forecasting; winter; China; Mongolia; Qinghai-Xizang Plateau
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171046
作者单位	School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, China; Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States; School of Atmospheric Sciences, Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Guangdong, China; Institute of Environment, Energy and Sustainability, Chinese University of Hong Kong, Hong Kong, Hong Kong
推荐引用方式 GB/T 7714	Lu M.,Kuang Z.,Yang S.,et al. A bridging role of winter snow over Northern China and Southern Mongolia in linking the east Asian winter and summer monsoons[J],2020,33(22).
APA	Lu M.,Kuang Z.,Yang S.,Li Z.,&Fan H..(2020).A bridging role of winter snow over Northern China and Southern Mongolia in linking the east Asian winter and summer monsoons.Journal of Climate,33(22).
MLA	Lu M.,et al."A bridging role of winter snow over Northern China and Southern Mongolia in linking the east Asian winter and summer monsoons".Journal of Climate 33.22(2020).