DOI: 10.1175/JCLI-D-13-00231.1
Scopus记录号: 2-s2.0-84890141789
论文题名: Baiu rainband termination in atmospheric and coupled atmosphere-ocean models
作者: Kuwano-Yoshida A. ; Taguchi B. ; Xie S.-P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 24 起始页码: 10111
结束页码: 10124
语种: 英语
Scopus关键词: Asia
; Atmosphere-ocean interactions
; Coupled models
; Fronts
; General circulation model
; Atmospheric thermodynamics
; Evaporation
; Natural convection
; Precipitation (chemical)
; Oceanography
; air-sea interaction
; atmosphere-ocean coupling
; front
; general circulation model
; precipitation (climatology)
; rainband
; sea surface temperature
; Asia
英文摘要: The baiu rainband is a summer rainband stretching from eastern China through Japan toward the northwestern Pacific. The climatological termination of the baiu rainband is investigated using the Japanese 25-yr Reanalysis (JRA-25), a stand-alone atmospheric general circulation model (GCM) forced with observed sea surface temperature (SST) and an atmosphere-ocean GCM (AOGCM). The baiu rainband over the North Pacific abruptly shifts northward and weakens substantially in early July in the atmospheric GCM (AGCM), too early compared to observations (late July). The midtroposphere westerly jet and its thermal advection explain this meridional shift of the baiu rainband, but the ocean surface evaporation modulates the precipitation intensity. In AGCM, deep convection in the subtropical northwestern Pacific sets in prematurely, displacing the westerly jet northward over the cold ocean surface earlier than in observations. The suppressed surface evaporation over the cold ocean suppresses precipitation even though the midtropospheric warm advection and vertically integrated moisture convergence are similar to those before the westerly jet's northward shift. As a result, the baiu rainband abruptly weakens after the northward shift in JRA-25 and AGCM. In AOGCM, cold SST biases in the subtropics inhibit deep convection, delaying the poleward excursion of the westerly jet. As a result, the upward motion induced by both the strong westerly jet and the rainband persist over the northwestern Pacific through summer in the AOGCM. The results indicate that the westerly jet and the ocean evaporation underneath are important for the baiu rainband, the latter suggesting an oceanic effect on this important phenomenon. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51508
Appears in Collections: 气候变化事实与影响
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作者单位: Earth Simulator Center, Japan Agency for Marine-Earth Science and Technology, Yokohama, Kanagawa, Japan; International Pacific Research Center, and the Department of Meteorology, University of Hawai'i at Manoa, Honolulu, HI, United States; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States
Recommended Citation:
Kuwano-Yoshida A.,Taguchi B.,Xie S.-P.. Baiu rainband termination in atmospheric and coupled atmosphere-ocean models[J]. Journal of Climate,2013-01-01,26(24)