DOI: 10.1175/JCLI-D-13-00315.1
Scopus记录号: 2-s2.0-84904511880
论文题名: TRMM-Observed shallow versus deep convection in the eastern Pacific related to large-scale circulations in reanalysis datasets
作者: Yokoyama C. ; Zipser E.J. ; Liu C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 14 起始页码: 5575
结束页码: 5592
语种: 英语
Scopus关键词: Precipitation (chemical)
; Radar
; Tropics
; Atmospheric circulation
; Convective clouds
; Diabatic heating
; Large-scale circulation
; Meridional circulation
; Pacific ocean
; Precipitation properties
; Vertical structures
; Troposphere
; atmospheric circulation
; atmospheric dynamics
; atmospheric modeling
; atmospheric motion
; convective cloud
; convective system
; diabatic process
; meridional circulation
; observational method
; precipitation (climatology)
; TRMM
; troposphere
; Pacific Ocean
; Pacific Ocean (East)
; Pacific Ocean (Tropical)
英文摘要: Over the eastern Pacific, recent studies have shown that a shallow large-scale meridional circulation with its return flow just above the boundary layer coexists with a deep Hadley circulation. This study examines how the vertical structure of large-scale circulations is related to satellite-observed individual precipitation properties over the eastern Pacific in boreal autumn. Three reanalysis datasets are used to describe differences in their behavior. The results are compared among reanalyses and three distinctly different convection periods, which are defined according to their radar echo depths. Shallow and deep circulations are shown to often coexist for each of the three periods, resulting in the multicell circulation structure. Deep (shallow) circulations preferentially appear in the mostly deep (shallow) convection period of radar echo depths. Thus, depth of convection basically corresponds to which circulation branch is dominant. This anticipated relationship between the circulation structure and depths of convection is common in all three reanalyses. Notable differences among reanalyses are found in the mid- to upper troposphere in either the time-mean state or the composite analysis based on the convection periods. Reanalyses have large variations in characteristics associated with deep circulations such as the upper-tropospheric divergence and outflows and the midlevel inflows, which are consistent with their different profiles of latent heating in the mid- to upper troposphere. On the other hand, discrepancies in shallow circulations and shallow convection are also found, but they are not as large as those in deep ones. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51004
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT, United States; Atmosphere and Ocean Research Institute, University of Tokyo, Chiba, Japan
Recommended Citation:
Yokoyama C.,Zipser E.J.,Liu C.. TRMM-Observed shallow versus deep convection in the eastern Pacific related to large-scale circulations in reanalysis datasets[J]. Journal of Climate,2014-01-01,27(14)