DOI: 10.1175/JCLI-D-13-00432.1
Scopus记录号: 2-s2.0-84897670645
论文题名: Evaluation of ERA-Interim and MERRA cloudiness in the southern ocean
作者: Naud C.M. ; Booth J.F. ; Del Genio A.D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 5 起始页码: 2109
结束页码: 2124
语种: 英语
Scopus关键词: Extratropical cyclones
; Moderate resolution imaging spectroradiometer
; Multiangle imaging spectroradiometer
; Research and application
; Satellite observations
; Shallow cumulus clouds
; Stability distributions
; Thermodynamic characteristics
; Clouds
; Radiometers
; Satellite imagery
; Storms
; Precipitation (meteorology)
; CALIPSO
; cloud cover
; CloudSat
; cold front
; cumulus
; MISR
; MODIS
; tropical cyclone
; Southern Ocean
英文摘要: The SouthernOcean cloud covermodeled by the Interim ECMWF Re-Analysis (ERA-Interim) andModern- Era Retrospective Analysis for Research and Applications (MERRA) reanalyses are compared against Moderate Resolution Imaging Spectroradiometer (MODIS) and Multiangle Imaging Spectroradiometer (MISR) observations. ERA-Interim monthly mean cloud amounts match the observations within 5%, while MERRA significantly underestimates the cloud amount. For a compositing analysis of clouds in warm season extratropical cyclones, both reanalyses show a low bias in cloud cover. They display a larger bias to the west of the cyclones in the region of subsidence behind the cold fronts. This low bias is larger for MERRA than for ERAInterim. Both MODIS and MISR retrievals indicate that the clouds in this sector are at a low altitude, often composed of liquid, and of a broken nature. The combined CloudSat-Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) cloud profiles confirm these passive observations, but they also reveal that low-level clouds in other parts of the cyclones are also not properly represented in the reanalyses. The two reanalyses are in fairly good agreement for the dynamic and thermodynamic characteristics of the cyclones, suggesting that the cloud, convection, or boundary layer schemes are the problem instead. An examination of the lower-tropospheric stability distribution in the cyclones from both reanalyses suggests that the parameterization of shallow cumulus clouds may contribute in a large part to the problem. However, the differences in the cloud schemes and in particular in the precipitation processes, which may also contribute, cannot be excluded. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50925
Appears in Collections: 气候变化事实与影响
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作者单位: Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; NASA Goddard Institute for Space Studies, New York, NY, United States; Earth and Atmospheric Sciences, City College of New York, New York, NY, United States
Recommended Citation:
Naud C.M.,Booth J.F.,Del Genio A.D.. Evaluation of ERA-Interim and MERRA cloudiness in the southern ocean[J]. Journal of Climate,2014-01-01,27(5)