DOI: 10.1175/JCLI-D-17-0590.1
Scopus记录号: 2-s2.0-85047085366
论文题名: Assessing the vertical latent heating structure of the east Pacific ITCZ using the CloudSat CPR and TRMM PR
作者: Huaman L. ; Schumacher C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 7 起始页码: 2563
结束页码: 2577
语种: 英语
英文关键词: Atmospheric circulation
Scopus关键词: Clouds
; Electromagnetic wave backscattering
; Radar
; Radar measurement
; Rain
; Rain gages
; Atmospheric circulation
; Convective precipitation
; Intertropical convergence zone
; Meridional circulation
; Precipitation radar
; Satellite retrieval
; Stratiform precipitation
; Tropical rainfall measuring missions
; Heating
; CloudSat
; heating
; intertropical convergence zone
; latent heat flux
; meridional circulation
; radar
; stratiform cloud
; TRMM
; convective system
; precipitation (climatology)
; Pacific Ocean
; Pacific Ocean (East)
英文摘要: In the east Pacific (EP) intertropical convergence zone (ITCZ), Tropical Rainfall Measuring Mission (TRMM) Precipitation Radar (PR) latent heating retrievals suggest a top-heavy structure; however, light precipitation and its associated low-level heating are underestimated by the PR. This study uses stratiform and deep convective precipitation from the TRMM PR and shallow precipitation from the more sensitive CloudSat radar to assess the seasonal latent heating structure in the EP ITCZ (130°-90°W) for 1998-2014. This study also uses reanalyses (MERRA-2, ERA-Interim, and NCEP-NCAR) to analyze the meridional circulation linked to variations in ITCZ heating. The TRMM/CloudSat heating profiles suggest a distinct seasonality. During DJF, latent heating peaks at 800 hPa because of the predominance of shallow convection and rises to 700 hPa during MAM as the contribution from deep convective rain increases. During JJA and SON, stratiform precipitation increases and the latent heating has a double peak at 700 and 400 hPa. Additionally, the EP ITCZ heating has a meridional slope throughout most of the year as a result of the prevalence of shallow (deep) convection in the southern (northern) part of the ITCZ. While the reanalyses agree that the most bottom-heavy heating occurs in DJF and the most top-heavy heating occurs in JJA, they underestimate heating aloft compared to the satellite retrievals throughout the year and show varying ability in representing the shallow meridional circulation and deeper Hadley cell overturning. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111571
Appears in Collections: 气候减缓与适应
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作者单位: Department of Atmospheric Sciences, Texas A and M University, College Station, TX, United States
Recommended Citation:
Huaman L.,Schumacher C.. Assessing the vertical latent heating structure of the east Pacific ITCZ using the CloudSat CPR and TRMM PR[J]. Journal of Climate,2018-01-01,31(7)