DOI: 10.1175/JCLI-D-11-00702.1
Scopus记录号: 2-s2.0-84870009577
论文题名: The surface downwelling solar radiation surplus over the southern ocean in the met office model: The role of midlatitude cyclone clouds
作者: Bodas-Salcedo A. ; Williams K.D. ; Field P.R. ; Lock A.P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 21 起始页码: 7467
结束页码: 7486
语种: 英语
Scopus关键词: Extratropical cyclones
; Radiation budget
; Radiative effects
; Short-wave radiation
; Southern ocean
; Atmospheric temperature
; Climatology
; Oceanography
; Radiation effects
; Sun
; Storms
; atmospheric modeling
; boundary layer
; cloud radiative forcing
; cluster analysis
; downwelling
; sea surface temperature
; shortwave radiation
; solar radiation
; Southern Ocean
英文摘要: The authors study the role of clouds in the persistent bias of surface downwelling shortwave radiation (SDSR) in the Southern Ocean in the atmosphere-only version of the Met Office model. The reduction of this bias in the atmosphere-only version is important to minimize sea surface temperature biases when the atmosphere model is coupled to a dynamic ocean. The authors use cloud properties and radiative fluxes estimates from the International Satellite Cloud Climatology Project (ISCCP) and apply a clustering technique to classify clouds into different regimes over the Southern Ocean. Then, they composite the cloud regimes around cyclone centers, which allows them to study the role of each cloud regime in a mean composite cyclone. Low- and midlevel clouds in the cold-air sector of the cyclones are responsible for most of the bias. Based on this analysis, the authors develop and test a new diagnosis of shear-dominated boundary layers. This change improves the simulation of the SDSR through a better simulation of the frequency of occurrence of the cloud regimes in the cyclone composite. Substantial biases in the radiative properties of the midtop and stratocumulus regimes are still present, which suggests the need to increase the optical depth of the low-level cloud with moderate optical depth and cloud with tops at midlevels. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52146
Appears in Collections: 气候变化事实与影响
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作者单位: Met Office Hadley Centre, Exeter, United Kingdom
Recommended Citation:
Bodas-Salcedo A.,Williams K.D.,Field P.R.,et al. The surface downwelling solar radiation surplus over the southern ocean in the met office model: The role of midlatitude cyclone clouds[J]. Journal of Climate,2012-01-01,25(21)