气候变化领域集成服务门户(CCPortal): Processes shaping the frontal-scale time-mean surface wind convergence patterns around the Kuroshio extension in winter

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DOI	10.1175/JCLI-D-19-0097.1
	Processes shaping the frontal-scale time-mean surface wind convergence patterns around the Kuroshio extension in winter
	Masunaga R.; Nakamura H.; Taguchi B.; Miyasaka T.
发表日期	2020
ISSN	0894-8755
起始页码	3
结束页码	25
卷号	33 期号:1
英文摘要	High-resolution satellite observations and numerical simulations have revealed that climatological-mean surface wind convergence and precipitation are enhanced locally around the midlatitude warm western boundary currents (WBCs) with divergence slightly to their poleward side. While steep sea surface temperature (SST) fronts along the WBCs have been believed to play an important role in shaping those frontal-scale atmospheric structures, the mechanisms and processes involved are still under debate. The present study explores specific daily scale atmospheric processes that are essential for shaping the frontal-scale atmospheric structure around the Kuroshio Extension (KE) in winter, taking advantage of a new product of global atmospheric reanalysis. Cluster analysis and case studies reveal that a zonally extending narrow band of surface wind convergence frequently emerges along the KE, which is typically observed under the surface northerlies after the passage of a developed synoptic-scale cyclone. Unlike its counterpart around the cyclone center and associated cold front, the surface convergence tends to be in moderate strength and more persistent, contributing dominantly to the distinct time-mean convergence/divergence contrast across the SST front. Accompanying ascent and convective precipitation, the band of convergence is a manifestation of a weak stationary atmospheric front anchored along the SST front or generation of a weak meso-a-scale cyclone. By reinforcing the ascent and convergence, latent heating through convective processes induced by surface convergence plays an important role in shaping the frontal-scale atmospheric structure around the KE. © 2019 American Meteorological Society.
英文关键词	Cluster analysis; Ocean currents; Storms; Surface waters; Atmospheric process; Atmospheric reanalysis; Convective precipitation; High resolution satellites; Kuroshio Extension; Sea surface temperature (SST); Surface wind convergence; Western boundary currents; Atmospheric structure; computer simulation; numerical model; satellite imagery; sea surface temperature; seasonal variation; spatial resolution; surface wind; western boundary current; Kuroshio Extension; Pacific Ocean
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/171552
作者单位	International Pacific Research Center, University of Hawaii at Manoa, Honolulu, HI, United States; Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan; Research Center for Advanced Science and Technology, University of Tokyo, Tokyo, Japan; Japan Meteorological Business Support Center, Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan; Faculty of Sustainable Design, University ofToyama, Toyama, Japan
推荐引用方式 GB/T 7714	Masunaga R.,Nakamura H.,Taguchi B.,et al. Processes shaping the frontal-scale time-mean surface wind convergence patterns around the Kuroshio extension in winter[J],2020,33(1).
APA	Masunaga R.,Nakamura H.,Taguchi B.,&Miyasaka T..(2020).Processes shaping the frontal-scale time-mean surface wind convergence patterns around the Kuroshio extension in winter.Journal of Climate,33(1).
MLA	Masunaga R.,et al."Processes shaping the frontal-scale time-mean surface wind convergence patterns around the Kuroshio extension in winter".Journal of Climate 33.1(2020).