DOI: 10.1002/2016MS000836
Scopus记录号: 2-s2.0-85017181738
论文题名: The impact of simulated mesoscale convective systems on global precipitation: A multiscale modeling study
作者: Tao W ; -K ; , Chern J ; -D
刊名: Journal of Advances in Modeling Earth Systems
ISSN: 19422466
出版年: 2017
卷: 9, 期: 2 起始页码: 790
结束页码: 809
语种: 英语
英文关键词: Atmospheric temperature
; Climate models
; Evaporation
; Oceanography
; Precipitation (meteorology)
; Rain
; Rain gages
; Surface waters
; Cloud resolving model
; Global precipitation
; Mesoscale Convective System
; Multi-scale Modeling
; Superparameterization
; Storms
; modeling
; numerical model
; parameterization
; precipitation (climatology)
; rainfall
; sea surface temperature
; TRMM
; tropical region
英文摘要: The importance of precipitating mesoscale convective systems (MCSs) has been quantified from TRMM precipitation radar and microwave imager retrievals. MCSs generate more than 50% of the rainfall in most tropical regions. MCSs usually have horizontal scales of a few hundred kilometers (km); therefore, a large domain with several hundred km is required for realistic simulations of MCSs in cloud-resolving models (CRMs). Almost all traditional global and climate models do not have adequate parameterizations to represent MCSs. Typical multiscale modeling frameworks (MMFs) may also lack the resolution (4 km grid spacing) and domain size (128 km) to realistically simulate MCSs. The impact of MCSs on precipitation is examined by conducting model simulations using the Goddard Cumulus Ensemble (GCE, a CRM) model and Goddard MMF that uses the GCEs as its embedded CRMs. Both models can realistically simulate MCSs with more grid points (i.e., 128 and 256) and higher resolutions (1 or 2 km) compared to those simulations with fewer grid points (i.e., 32 and 64) and low resolution (4 km). The modeling results also show the strengths of the Hadley circulations, mean zonal and regional vertical velocities, surface evaporation, and amount of surface rainfall are weaker or reduced in the Goddard MMF when using more CRM grid points and higher CRM resolution. In addition, the results indicate that large-scale surface evaporation and wind feedback are key processes for determining the surface rainfall amount in the GMMF. A sensitivity test with reduced sea surface temperatures shows both reduced surface rainfall and evaporation. © 2017. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75764
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Mesoscale Atmospheric Processes Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, United States
Recommended Citation:
Tao W,-K,, Chern J,et al. The impact of simulated mesoscale convective systems on global precipitation: A multiscale modeling study[J]. Journal of Advances in Modeling Earth Systems,2017-01-01,9(2)