DOI: 10.1175/JCLI-D-15-0255.1
Scopus记录号: 2-s2.0-84957711713
论文题名: Impact of parameterized physical processes on simulated tropical cyclone characteristics in the community atmosphere model
作者: He F. ; Posselt D.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 24 起始页码: 9857
结束页码: 9872
语种: 英语
Scopus关键词: Atmospheric radiation
; Hurricanes
; Natural convection
; Potential energy
; Precipitation (meteorology)
; Sensitivity analysis
; Storms
; Tropics
; Community atmosphere model
; Convective available potential energies
; General circulation model
; Linear perturbation analysis
; Physical parameterization
; Sensitivity studies
; Sub-grid scale process
; Tropical cyclone
; Parameterization
; algorithm
; atmospheric general circulation model
; atmospheric modeling
; atmospheric structure
; parameterization
; sensitivity analysis
; tropical cyclone
英文摘要: This study advances the understanding of how parameterized physical processes affect the development of tropical cyclones (TCs) in the Community Atmosphere Model (CAM) using the Reed-Jablonowski TC test case. It examines the impact of changes in 24 parameters across multiple physical parameterization schemes that represent convection, turbulence, precipitation, and cloud processes. The one-at-a-time (OAT) sensitivity analysis method quantifies the relative influence of each parameter on TC simulations and identifies which parameters affect six different TC characteristics: Intensity, precipitation, longwave cloud radiative forcing (LWCF), shortwave cloud radiative forcing (SWCF), cloud liquid water path (LWP), and ice water path (IWP). It is shown that TC intensity is mainly sensitive to the parcel fractional mass entrainment rate (dmpdz) in deep convection. A decrease in this parameter can lead to a change in simulated intensity from a tropical depression to a category-4 storm. Precipitation and SWCF are strongly affected by three parameters in deep convection: Tau (time scale for consumption rate of convective available potential energy), dmpdz, and C0_ocn (precipitation coefficient). Changes in physical parameters generally do not affect LWCF much. In contrast, LWP and IWP are very sensitive to changes in C0_ocn. The changes can be as large as 10 (5) times the control mean value for LWP (IWP). Further examination of the response functions for the subset of most sensitive parameters reveals nonlinear relationships between parameters and most output variables, suggesting that linear perturbation analysis may produce misleading results when applied to strongly nonlinear systems. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50479
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United States
Recommended Citation:
He F.,Posselt D.J.. Impact of parameterized physical processes on simulated tropical cyclone characteristics in the community atmosphere model[J]. Journal of Climate,2015-01-01,28(24)