气候变化领域集成服务门户(CCPortal): Cold surge pathways in east Asia and their tropical impacts

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DOI	10.1175/JCLI-D-20-0552.1
	Cold surge pathways in east Asia and their tropical impacts
	Abdillah M.R.; Kanno Y.; Iwasaki T.; Matsumoto J.
发表日期	2021
ISSN	0894-8755
起始页码	157
结束页码	170
卷号	34 期号:1
英文摘要	Cold surge occurrences are one of the robust features of winter monsoon in East Asia and are characterized by equatorward outbreaks of cold air from the high latitudes. Beside greatly affecting weather variability across the Far East, cold surges are of importance for Southeast Asian countries because they can propagate far to the tropics and excite convective activities. However, the tropical responses highly depend on the downstream pathways of the surges. To better understand how cold surges influence tropical weather, we investigate 160 cold surges identified using a quantitative approach during 40 winters from 1979/80 to 2018/19, and then classify them into several groups based on their prominent pathways. At the midlatitudes, we find two groups: one for surges that show clear equatorward propagation of cold air to lower latitudes and the other for surges that turn eastward and bring cold air to the North Pacific. These groups arise due to the strength difference of the Siberian high expansion controlled by cold air blocking near the Tibetan Plateau. The tropical impact is evident in the former group. We perform further classification on this group and find four types of surges based on their pathways in the low latitudes: 1) South China Sea (SCS) surges, 2) Philippines Sea (PHS) surges, 3) both SCS and PHS surges, and 4) blocked surges. They exhibit distinct precipitation signatures over the Maritime Continent, which are driven by interactions between the surges and the pre-existing synoptic conditions over the tropics, particularly the Madden-Julian oscillation (MJO). © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Climatology; Convective activity; Madden-Julian oscillation; Maritime Continent; Quantitative approach; Strength differences; Synoptic conditions; Tropical response; Weather variability; Tropics; airflow; cold air; convective system; low temperature; Madden-Julian oscillation; seasonal variation; synoptic meteorology; tropical region; Far East; Pacific Ocean; Pacific Ocean (North); Southeast Asia
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/170976
作者单位	Atmospheric Science Research Group, Faculty of Earth Sciences and Technology, Institut Teknologi Bandung, Bandung, Indonesia; Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry, Tokyo, Japan; Department of Geophysics, Graduate School of Science, Tohoku University, Sendai, Japan; Department of Geography, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Hachioji, Japan; Dynamic Coupling of Ocean-Atmosphere-Land Research Program, Japan Agency for Marine Earth Science and Technology, Yokosuka, Japan
推荐引用方式 GB/T 7714	Abdillah M.R.,Kanno Y.,Iwasaki T.,et al. Cold surge pathways in east Asia and their tropical impacts[J],2021,34(1).
APA	Abdillah M.R.,Kanno Y.,Iwasaki T.,&Matsumoto J..(2021).Cold surge pathways in east Asia and their tropical impacts.Journal of Climate,34(1).
MLA	Abdillah M.R.,et al."Cold surge pathways in east Asia and their tropical impacts".Journal of Climate 34.1(2021).