DOI: 10.1175/JCLI-D-17-0426.1
Scopus记录号: 2-s2.0-85041945557
论文题名: Impact of ice cloud microphysics on satellite cloud retrievals and broadband flux radiative transfer model calculations
作者: Loeb N.G. ; Yang P. ; Rose F.G. ; Hong G. ; Sun-Mack S. ; Minnis P. ; Kato S. ; Ham S.-H. ; Smith W.L. ; Jr. ; Hioki S. ; Tang G.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 5 起始页码: 1851
结束页码: 1864
语种: 英语
英文关键词: Cirrus clouds
; Cloud microphysics
; Cloud retrieval
; Model evaluation/performance
; Radiation budgets
Scopus关键词: Budget control
; Climate models
; Clouds
; Optical properties
; Particle size
; Radiative transfer
; Satellites
; Cirrus clouds
; Cloud microphysics
; Cloud retrieval
; Model evaluation/performance
; Radiation budget
; Ice
; broadband data
; cirrus
; climate modeling
; cloud microphysics
; ice
; radiation budget
; radiative transfer
; satellite imagery
英文摘要: Ice cloud particles exhibit a range of shapes and sizes affecting a cloud's single-scattering properties. Because they cannot be inferred from passive visible/infrared imager measurements, assumptions about the bulk single-scattering properties of ice clouds are fundamental to satellite cloud retrievals and broadband radiative flux calculations. To examine the sensitivity to ice particle model assumptions, three sets of models are used in satellite imager retrievals of ice cloud fraction, thermodynamic phase, optical depth, effective height, and particle size, and in top-of-atmosphere (TOA) and surface broadband radiative flux calculations. The three ice particle models include smooth hexagonal ice columns (SMOOTH), roughened hexagonal ice columns, and a two-habit model (THM) comprising an ensemble of hexagonal columns and 20-element aggregates. While the choice of ice particle model has a negligible impact on daytime cloud fraction and thermodynamic phase, the global mean ice cloud optical depth retrieved from THM is smaller than from SMOOTH by 2.3 (28%), and the regional root-mean-square difference (RMSD) is 2.8 (32%). Effective radii derived from THM are 3.9 μm (16%) smaller than SMOOTH values and the RMSD is 5.2 μm (21%). In contrast, the regional RMSD in TOA and surface flux between THM and SMOOTH is only 1% in the shortwave and 0.3% in the longwave when a consistent ice particle model is assumed in the cloud property retrievals and forward radiative transfer model calculations. Consequently, radiative fluxes derived using a consistent ice particle model assumption throughout provide a more robust reference for climate model evaluation compared to ice cloud property retrievals. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111628
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: NASA Langley Research Center, Hampton, VA, United States; Department of Atmospheric Sciences, Texas A and M University, College Station, TX, United States; Science Systems and Applications Inc., Hampton, VA, United States
Recommended Citation:
Loeb N.G.,Yang P.,Rose F.G.,et al. Impact of ice cloud microphysics on satellite cloud retrievals and broadband flux radiative transfer model calculations[J]. Journal of Climate,2018-01-01,31(5)