DOI: 10.1175/JCLI-D-15-0291.1
Scopus记录号: 2-s2.0-84957831263
论文题名: Climatology of polar lows over the sea of Japan using the JRA-55 reanalysis
作者: Yanase W. ; Niino H. ; Watanabe S.-I.I. ; Hodges K. ; Zahn M. ; Spengler T. ; Gurvich I.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 2 起始页码: 419
结束页码: 437
语种: 英语
Scopus关键词: Storms
; Surface waters
; Composite analysis
; East Asian winter monsoon
; Extratropical cyclones
; Japanese islands
; Lower troposphere
; Maximum intensities
; Polar lows
; Tracking algorithm
; Climatology
; baroclinic motion
; climatology
; cyclogenesis
; mesoscale meteorology
; monsoon
; polar vortex
; synoptic meteorology
; troposphere
; winter
; Far East
; Pacific Ocean
; Sea of Japan
英文摘要: Polar lows are intense meso-a-scale cyclones that develop over the oceans poleward of the main baroclinic zone. A number of previous studies have reported polar low formation over the Sea of Japan within the East Asian winter monsoon. To understand the climatology of polar lows over the Sea of Japan, a tracking algorithm for polar lows is applied to the recent JRA-55 reanalysis. The polar low tracking is applied to 36 cold seasons (October-March) from October 1979 to March 2015. The polar lows over the Sea of Japan reach their maximum intensity on the southeastern side of the midline between the Japanese islands and the Asian continent. Consistent with previous case studies, composite analysis demonstrates that the polar low development is associated with the enhanced northerly flow on the western side of a synoptic-scale extratropical cyclone, with the cold trough in the midtroposphere and with increased heat fluxes from the sea surface. Furthermore, the present climatological study has revealed two dominant directions of motion of the polar lows: Southward and eastward. Southward-moving polar lows are steered by a strong northerly flow in the lower troposphere, which is enhanced on the western side of synoptic-scale extratropical cyclones, while the eastward-moving polar lows occur within a planetary-scale westerly flow in the midlatitudes. Thus, the direction of polar low motion reflects the difference in planetary- and synoptic-scale conditions. © 2016 American Meteorological Society. 资助项目: JSPS, Japan Society for the Promotion of Science London
; JSPS, Japan Society for the Promotion of Science London
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50121
Appears in Collections: 气候变化事实与影响
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作者单位: Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Japan; Department of Meteorology, University of Reading, Reading, United Kingdom; Institute of Coastal Research, Helmholtz Zentrum Geesthacht, Geesthacht, Germany; Geophysical Institute, University of Bergen, Bjerknes Centre for Climate Research, Bergen, Norway; V. I. Il'ichev Pacific Oceanological Institute, FEB RAS, Vladivostok, Russian Federation
Recommended Citation:
Yanase W.,Niino H.,Watanabe S.-I.I.,et al. Climatology of polar lows over the sea of Japan using the JRA-55 reanalysis[J]. Journal of Climate,2016-01-01,29(2)