DOI: 10.1175/JCLI-D-12-00154.1
Scopus记录号: 2-s2.0-84877800284
论文题名: Exploring a global multiresolution modeling approach using aquaplanet simulations*
作者: Rauscher S.A. ; Ringler T.D. ; Skamarock W.C. ; Mirin A.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 8 起始页码: 2432
结束页码: 2452
语种: 英语
Scopus关键词: Community atmosphere model
; Kinetic energy spectra
; Multi-resolution Modeling
; Multiresolution mesh
; Precipitation anomalies
; Precipitation characteristics
; Regional climate simulation
; Tropical precipitation
; Kinetic energy
; Kinetics
; Lasers
; Spectroscopy
; Tropics
; Cams
; asymmetry
; atmospheric modeling
; finite volume method
; fluid dynamics
; Hadley cell
; hydrostatics
; kinetic energy
; parameterization
; precipitation (climatology)
英文摘要: Results from aquaplanet experiments performed using the Model for Prediction across Scales (MPAS) hydrostatic dynamical core implemented within the Department of Energy (DOE)-NCAR Community Atmosphere Model (CAM) are presented. MPAS is an unstructured-grid approach to climate system modeling that supports both quasi-uniform and variable-resolution meshing of the sphere based on conforming grids. Using quasi-uniform simulations at resolutions of 30, 60, 120, and 240 km, the authors evaluate the performance of CAM-MPAS via its kinetic energy spectra, general circulation, and precipitation characteristics. By analyzing an additional variable-resolution simulation with grid spacing that varies from 30 km in a spherical, continental-sized equatorial region to 240 km elsewhere, the CAM-MPAS's potential for use as a regional climate simulation tool is explored. Similar to other quasi-uniform aquaplanet simulations, tropical precipitation increases with resolution, indicating the resolution sensitivity of the physical parameterizations. Comparison with the finite volume (FV) dynamical core suggests a weaker tropical circulation in the CAM-MPAS simulations, which is evident in reduced tropical precipitation and a weaker Hadley circulation. In the variable-resolution simulation, the kinetic energy spectrum within the high-resolution region closely resembles the quasi-uniform 30-km simulation, indicating a robust simulation of the fluid dynamics. As suggested by the quasi-uniform simulations, the CAM4 physics behave differently in the high and low resolution regions. A positive precipitation anomaly occurs on the western edge of the high-resolution region, exciting a Gill-type response; this zonal asymmetry represents the errors incurred in a variable resolution setting. When paired with a multiresolution mesh, the aquaplanet test case offers an exceptional opportunity to examine the response of physical parameterizations to grid resolution. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51881
Appears in Collections: 气候变化事实与影响
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作者单位: Fluid Dynamics and Solid Mechanics Group, Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico, United States; Mesoscale and Microscale Meteorology Division, National Center for Atmospheric Research, Boulder, Colorado, United States; Center for Applied Scientific Computing, Lawrence Livermore National Laboratory, Livermore, California, United States
Recommended Citation:
Rauscher S.A.,Ringler T.D.,Skamarock W.C.,et al. Exploring a global multiresolution modeling approach using aquaplanet simulations*[J]. Journal of Climate,2013-01-01,26(8)