气候变化领域集成服务门户(CCPortal): Role of the cold okhotsk sea on the climate of the north pacific subtropical high and baiu precipitation

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DOI	10.1175/JCLI-D-20-0432.1
	Role of the cold okhotsk sea on the climate of the north pacific subtropical high and baiu precipitation
	Kawasaki K.; Tachibana Y.; Nakamura T.; Yamazaki K.
发表日期	2021
ISSN	0894-8755
起始页码	495
结束页码	507
卷号	34 期号:2
英文摘要	Summertime temperatures in marginal seas are, in general, colder than on the surrounding continent because of the large contrast in heat capacity between the land and the ocean. The Okhotsk Sea, which is covered by sea ice until early summer, is much colder than the surrounding continent in summer. The Okhotsk Sea is thus located in an area with one of the largest temperature contrasts of all the marginal seas in summertime midlatitudes. Cooled air over the Okhotsk Sea may have an impact on remote summer climates, such as by serving as the source of cold-air advection that results in a poor crop harvest in Japan. Here, we examine the role of the Okhotsk Sea on the early summer climate of the western part of the North Pacific through an ideal numerical experiment by artificially changing the model's default oceanic condition in the Okhotsk Sea to a condition of land cover. Simulation results reveal that the presence of the Okhotsk Sea increases precipitation of the baiu/mei-yu front through strengthening of the northward moisture flux at the western edge of an intensified North Pacific subtropical high. The Okhotsk influence farther extends toward western North America to which the strengthened jet stream with a storm track extends. This remote influence is achievable through feedback from a transient eddy anomaly that is activated by the surface temperature gradient between the cold Okhotsk Sea and the warm Pacific Ocean. The findings imply that the existence of the Okhotsk Sea strengthens the East Asian summer monsoons. © 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	Sea ice; Specific heat; Tropics; East Asian summer monsoon; Marginal seas; Moisture fluxes; Numerical experiments; Oceanic conditions; Summer climate; Surface temperature gradient; Temperature contrast; Climate models; air-sea interaction; atmospheric circulation; climatology; cold air; general circulation model; jet stream; marginal sea; monsoon; precipitation (climatology); sea surface temperature; temperature gradient; North America; Pacific Ocean; Pacific Ocean (North); Sea of Okhotsk
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/170958
作者单位	Weather and Climate Dynamics Laboratory, Mie University, Mie, Japan; Faculty of Environmental Earth Science, Hokkaido University, Hokkaido, Japan; Arctic Research Center, Hokkaido University, Hokkaido, Japan
推荐引用方式 GB/T 7714	Kawasaki K.,Tachibana Y.,Nakamura T.,et al. Role of the cold okhotsk sea on the climate of the north pacific subtropical high and baiu precipitation[J],2021,34(2).
APA	Kawasaki K.,Tachibana Y.,Nakamura T.,&Yamazaki K..(2021).Role of the cold okhotsk sea on the climate of the north pacific subtropical high and baiu precipitation.Journal of Climate,34(2).
MLA	Kawasaki K.,et al."Role of the cold okhotsk sea on the climate of the north pacific subtropical high and baiu precipitation".Journal of Climate 34.2(2021).