DOI: 10.1175/JCLI-D-16-0608.1
Scopus记录号: 2-s2.0-85041958771
论文题名: Cirrus cloud properties as seen by the CALIPSO satellite and ECHAM-HAM global climate model
作者: Gasparini B. ; Meyer A. ; Neubauer D. ; Münch S. ; Lohmann U.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 5 起始页码: 1983
结束页码: 2003
语种: 英语
英文关键词: Cirrus clouds
; Cloud microphysics
; General circulation models
; Ice crystals
; Lidars/Lidar observations
; Satellite observations
Scopus关键词: Aerosols
; Climate models
; Clouds
; Glacial geology
; Optical radar
; Satellites
; Cirrus clouds
; Cloud microphysics
; General circulation model
; Ice crystals
; Lidars/lidar observations
; Satellite observations
; Ice
; atmospheric general circulation model
; CALIPSO
; cirrus
; climate modeling
; cloud cover
; cloud microphysics
; global climate
; ice crystal
; lidar
; satellite data
英文摘要: Cirrus clouds impact the planetary energy balance and upper-tropospheric water vapor transport and are therefore relevant for climate. In this study cirrus clouds at temperatures colder than 240°C simulated by the ECHAM-Hamburg Aerosol Module (ECHAM-HAM) general circulation model are compared to Cloud- Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite data. The model captures the general cloud cover pattern and reproduces the observed median ice water content within a factor of 2, while extinction is overestimated by about a factor of 3 as revealed by temperature-dependent frequency histograms. Two distinct types of cirrus clouds are found: in situ-formed cirrus dominating at temperatures colder than 255°C and liquid-origin cirrus dominating at temperatures warmer than 255°C. The latter cirrus form in anvils of deep convective clouds or by glaciation of mixed-phase clouds, leading to high ice crystal number concentrations. They are associated with extinction coefficients and ice water content of up to 1 km-1 and 0.1 gm-3, respectively, while the in situ-formed cirrus are associated with smaller extinction coefficients and ice water content. In situ-formed cirrus are nucleated either heterogeneously or homogeneously. The simulated homogeneous ice crystals are similar to liquid-origin cirrus, which are associated with high ice crystal number concentrations. On the contrary, heterogeneously nucleated ice crystals appear in smaller number concentrations. However, ice crystal aggregation and depositional growth smooth the differences between several formation mechanisms, making the attribution to a specific ice nucleation mechanism challenging. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111652
Appears in Collections: 气候减缓与适应
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作者单位: ETH Zürich, Zürich, Switzerland; Atmospheric Data Division, Federal Office of Meteorology and Climatology, MeteoSwiss, Payerne, Switzerland
Recommended Citation:
Gasparini B.,Meyer A.,Neubauer D.,et al. Cirrus cloud properties as seen by the CALIPSO satellite and ECHAM-HAM global climate model[J]. Journal of Climate,2018-01-01,31(5)