DOI: 10.1175/JCLI-D-14-00314.1
Scopus记录号: 2-s2.0-84961374097
论文题名: Separation of climatological imprints of the Kuroshio Extension and Oyashio fronts on the wintertime atmospheric boundary layer: Their sensitivity to SST resolution prescribed for atmospheric reanalysis
作者: Masunaga R. ; Nakamura H. ; Miyasaka T. ; Nishii K. ; Tanimoto Y.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 5 起始页码: 1764
结束页码: 1787
语种: 英语
Scopus关键词: Atmospheric boundary layer
; Atmospheric temperature
; Boundary layers
; Heat flux
; Ocean currents
; Sea level
; Surface waters
; Air sea interactions
; Frontogenesis/frontolysis
; Meso-scale systems
; Reanaly
; Satellite observations
; Oceanography
; air-sea interaction
; baroclinic motion
; boundary layer
; climatology
; frontogenesis
; marine atmosphere
; mesoscale meteorology
; oceanic front
; sea surface temperature
; winter
; Kuroshio Extension
; Oyashio Current
; Pacific Ocean
英文摘要: Mesoscale structures of the wintertime marine atmospheric boundary layer (MABL) as climatological imprints of oceanic fronts within the Kuroshio-Oyashio Extension (KOE) region east of Japan are investigated by taking advantage of high horizontal resolution of the ERA-Interim global atmospheric reanalysis data, for which the resolution of sea surface temperature (SST) data has been improved. These imprints, including locally enhanced sensible and latent heat fluxes and local maxima in cloudiness and precipitation in association with locally strengthened surface-wind convergence in the vicinities of SST fronts along the warm Kuroshio Extension and cool Oyashio to its north, are also identified in high-resolution satellite data. In addition to thesemesoscaleMABL features, meridionally confined near-surface baroclinic zones and zonally oriented sea level pressure (SLP) minima associated with the dual SST fronts are represented in ERA-Interim only in the period of high-resolution SST, but those imprints of the Oyashio front are missing in the low-resolution SST period. In the presence of the prevailing monsoonal northerlies, latitudinal displacements of the SLP trough, baroclinic zone, and the peak meridional gradient of the turbulent heat fluxes from each of the corresponding SST fronts are also found to be sensitive to the frontal width that depends on the SST resolution. The analysis herein suggests that the converging surface northerlies into the SLP minima can contribute positively to the formation of a surface baroclinic zone along the Kuroshio Extension, while a stronger baroclinic zone along the Oyashio front is maintained primarily through the pronounced cross-frontal contrast in sensible heat release from the ocean. © 2015 American Meteorological Society. 资助项目: MEXT, Ministry of Education, Culture, Sports, Science, and Technology
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50578
Appears in Collections: 气候变化事实与影响
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作者单位: Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan; Research Institute for Global Change, JAMSTEC, Yokohama, Japan; Faculty of Environmental Earth Science, Graduate School of Environmental Science, Hokkaido University, Sapporo, Japan
Recommended Citation:
Masunaga R.,Nakamura H.,Miyasaka T.,et al. Separation of climatological imprints of the Kuroshio Extension and Oyashio fronts on the wintertime atmospheric boundary layer: Their sensitivity to SST resolution prescribed for atmospheric reanalysis[J]. Journal of Climate,2015-01-01,28(5)