DOI: 10.1002/jgrd.50115
论文题名: Evaluation of cloud microphysics schemes in simulations of a winter storm using radar and radiometer measurements
作者: Han M. ; Braun S.A. ; Matsui T. ; Williams C.R.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 3 起始页码: 1401
结束页码: 1419
语种: 英语
英文关键词: cloud microphysics
; model evaluation
; radar
; radiometer
; satellite simulator
; winter precipitation
Scopus关键词: Computer simulation
; Ice
; Physics
; Radar
; Radiometers
; Reflection
; Satellite simulators
; Snow
; Storms
; Cloud microphysics
; Microwave brightness temperature
; Model evaluation
; Particles size distribution
; Precipitation profiling
; Precipitation properties
; Radiative transfer model
; Winter precipitation
; Radar measurement
; cloud microphysics
; Doppler effect
; precipitation (climatology)
; reflectivity
; satellite imagery
; simulation
; storm
; winter
; California
; United States
英文摘要: Using observations from a space-borne radiometer and a ground-based precipitation profiling radar, the impact of cloud microphysics schemes in the WRF model on the simulation of microwave brightness temperature (Tb ), radar reflectivity, and Doppler velocity (Vdop ) is studied for a winter storm in California. The unique assumptions of particles size distributions, number concentrations, shapes, and fall speeds in different microphysics schemes are implemented into a satellite simulator and customized calculations for the radar are performed to ensure consistent representation of precipitation properties between the microphysics schemes and the radiative transfer models. Simulations with four different schemes in the WRF model, including the Goddard scheme (GSFC), the WRF single-moment 6-class scheme (WSM6), the Thompson scheme (THOM), and the Morrison double-moment scheme (MORR), are compared directly with measurements from the sensors. Results show large variations in the simulated radiative properties. General biases of ∼20 K or larger are found in (polarization-corrected) Tb , which is linked to an overestimate of the precipitating ice aloft. The simulated reflectivity with THOM appears to agree well with the observations, while high biases of ∼5-10 dBZ are found in GSFC, WSM6 and MORR. Peak reflectivity in MORR exceeds other schemes. These biases are attributable to the snow intercept parameters or the snow number concentrations. Simulated Vdop values based on GSFC agree with the observations well, while other schemes appear to have a ∼1 m s-1 high bias in the ice layer. In the rain layer, the model representations of Doppler velocity vary at different sites. ©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/63933
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: Goddard Earth Sciences Technology and Research, Morgan State University, Baltimore, MD, United States; Mesoscale Atmospheric Process Laboratory, NASA Goddard Space Flight Center, Code 612, Greenbelt, MD 20771, United States; ESSIC, University of Maryland, College Park, MD, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; NOAA Earth System Research Laboratory, Boulder, CO, United States
Recommended Citation:
Han M.,Braun S.A.,Matsui T.,et al. Evaluation of cloud microphysics schemes in simulations of a winter storm using radar and radiometer measurements[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(3)