DOI: 10.1175/JCLI-D-15-0821.1
Scopus记录号: 2-s2.0-84977508616
论文题名: The impact of two coupled cirrus microphysics-radiation parameterizations on the temperature and specific humidity biases in the tropical tropopause layer in a climate model
作者: Baran A.J. ; Hilla P. ; Walters D. ; Hardman S.C. ; Furtado K. ; Field P.R. ; Manners J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 14 起始页码: 5299
结束页码: 5316
语种: 英语
Scopus关键词: Atmospheric radiation
; Climate models
; Clouds
; Optical properties
; Particle size
; Particle size analysis
; Radiation
; Transistor transistor logic circuits
; Cirrus clouds
; Cloud parameterizations
; Cloud radiative effects
; Model errors
; Radiation parameterization
; Temperature and humidities
; Temperature dependent
; Tropical tropopause layers
; Parameterization
; cirrus
; climate modeling
; cloud microphysics
; cloud radiative forcing
; error analysis
; humidity
; parameterization
; tropical meteorology
; tropopause
英文摘要: The impact of two different coupled cirrus microphysics-radiation parameterizations on the zonally averaged temperature and humidity biases in the tropical tropopause layer (TTL) of a Met Office climate model configuration is assessed. One parameterization is based on a linear coupling between a model prognostic variable, the ice mass mixing ratio qi, and the integral optical properties. The second is based on the integral optical properties being parameterized as functions of qi and temperature, Tc, where the mass coefficients (i.e., scattering and extinction) are parameterized as nonlinear functions of the ratio between qi and Tc. The cirrus microphysics parameterization is based on a moment estimation parameterization of the particle size distribution (PSD), which relates the mass moment (i.e., second moment if mass is proportional to size raised to the power of 2) of the PSD to all other PSD moments through the magnitude of the second moment and Tc. This same microphysics PSD parameterization is applied to calculate the integral optical properties used in both radiation parameterizations and, thus, ensures PSD and mass consistency between the cirrus microphysics and radiation schemes. In this paper, the temperature-non-dependent and temperature-dependent parameterizations are shown to increase and decrease the zonally averaged temperature biases in the TTL by about 1 K, respectively. The temperature-dependent radiation parameterization is further demonstrated to have a positive impact on the specific humidity biases in the TTL, as well as decreasing the shortwave and longwave biases in the cloudy radiative effect. The temperature-dependent radiation parameterization is shown to be more consistent with TTL and global radiation observations. © 2016 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50147
Appears in Collections: 气候变化事实与影响
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作者单位: Met Office, Exeter, United Kingdom; University of Leeds, Leeds, United Kingdom; Department of Meteorology, University of Reading, Reading, United Kingdom
Recommended Citation:
Baran A.J.,Hilla P.,Walters D.,et al. The impact of two coupled cirrus microphysics-radiation parameterizations on the temperature and specific humidity biases in the tropical tropopause layer in a climate model[J]. Journal of Climate,2016-01-01,29(14)