DOI: 10.1002/jgrd.50496
论文题名: Evaluation of clouds in ACCESS using the satellite simulator package COSP: Regime-sorted tropical cloud properties
作者: Franklin C.N. ; Sun Z. ; Bi D. ; Dix M. ; Yan H. ; Bodas-Salcedo A.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 12 起始页码: 6663
结束页码: 6679
语种: 英语
英文关键词: ACCESS
; CALIPSO
; climate modelling
; cloud parameterization
; CloudSat
; satellite simulators
Scopus关键词: Atmospheric temperature
; Climate models
; Clouds
; Rain
; ACCESS
; Autoconversion parameterization
; CALIPSO
; Cloud radiative effects
; Cloud-aerosol lidar and infrared pathfinder satellite observations
; CloudSat
; Sea surface temperatures
; Thermodynamic conditions
; Satellite simulators
; cloud
; cloud cover
; infrared imagery
; longwave radiation
; marine ecosystem
; oceanic convection
; satellite imagery
; sensitivity analysis
; simulation
英文摘要: This study uses a regime sorting technique to explore the relationships that ACCESS1.3 clouds have with the large-scale environment. Satellite simulator output is used to demonstrate that the modeled clouds have similar sensitivity to the large-scale dynamic and thermodynamic conditions as shown by CloudSat and Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO). The high cloud cover and longwave cloud radiative effect is represented very well in the model across all regimes. The cloud types that the model simulates the most poorly are stratocumulus over cool sea surface temperatures (SSTs) and the deep convective regimes associated with strong upward midtropospheric vertical velocity and weak lower tropospheric stabilities. The reflectance of the deep convective regimes shows a stronger sensitivity to SST and less dependence on the large-scale dynamics than the observations. Many of the model errors identified occur across all regimes, such as the underestimate of clouds with large scattering ratios (SR) and the too frequent occurrence of drizzle and rain. A sensitivity test in which a different warm rain scheme was used shows that the modelled frequency of occurrence of nonprecipitating low cloud is quite sensitive to the autoconversion parameterization. The new scheme produced more cloud with large SR and higher cloud tops in better agreement with the observations. The thermodynamic regime analysis shows that the transition of shallow to deeper convection in the model requires a warmer SST and weaker LTS than the observations. The significant underestimate of cumulus congestus is likely to contribute to this delay due to the role these clouds have in preconditioning the midtroposphere for the onset of deep convection. Key Points High cloud cover and longwave cloud forcing is represented well across regimes Non-precipitating cloud and cloud top heights are sensitive to autoconversion Modeled transition from shallow to deeper convection requires warmer SST © 2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63596
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: CSIRO Marine and Atmospheric Research, Private Bag No.1, Aspendale, VIC 3195, Australia; Center for Australian Weather and Climate Research, Australian Bureau of Meteorology, Aspendale, Melbourne, Australia; Met Office Hadley Center, Exeter, United Kingdom
Recommended Citation:
Franklin C.N.,Sun Z.,Bi D.,et al. Evaluation of clouds in ACCESS using the satellite simulator package COSP: Regime-sorted tropical cloud properties[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(12)