globalchange  > 气候减缓与适应
DOI: 10.1002/grl.50597
论文题名:
Robustness and sensitivities of central U.S. summer convection in the super-parameterized CAM: Multi-model intercomparison with a new regional EOF index
作者: Kooperman G.J.; Pritchard M.S.; Somerville R.C.J.
刊名: Geophysical Research Letters
ISSN: 0094-8860
EISSN: 1944-8591
出版年: 2013
卷: 40, 期:12
起始页码: 3287
结束页码: 3291
语种: 英语
英文关键词: Central United States ; Community Atmosphere Model ; empirical orthogonal function ; mesoscale convective system ; multiscale modeling framework ; super-parameterization
Scopus关键词: Central United States ; Community atmosphere model ; Empirical Orthogonal Function ; Mesoscale Convective System ; Multi-scale Modeling ; super-parameterization ; Cams ; Climatology ; Orthogonal functions ; Physics ; Storms ; Parameterization ; atmospheric convection ; climate modeling ; cloud microphysics ; Madden-Julian oscillation ; mesoscale meteorology ; parameterization ; rainfall ; United States
英文摘要: Mesoscale convective systems (MCSs) can bring up to 60% of summer rainfall to the central United States but are not simulated by most global climate models. In this study, a new empirical orthogonal function based index is developed to isolate the MCS activity, similar to that developed by Wheeler and Hendon (2004) for the Madden-Julian Oscillation. The index is applied to compactly compare three conventional- and super-parameterized (SP) versions (3.0, 3.5, and 5.0) of the National Center for Atmospheric Research Community Atmosphere Model (CAM). Results show that nocturnal, eastward propagating convection is a robust effect of super-parameterization but is sensitive to its specific implementation. MCS composites based on the index show that in SP-CAM3.5, convective MCS anomalies are unrealistically large scale and concentrated, while surface precipitation is too weak. These aspects of the MCS signal are improved in the latest version (SP-CAM5.0), which uses high-order microphysics. Key Points A new EOF based index compactly evaluates the mid-latitude MCS signal in GCMs Central US summer MCS physics is a robust effect of cloud super-parameterization The MCS signal is most realistic in SP-CAM5.0 that uses high-order microphysics ©2013. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880549828&doi=10.1002%2fgrl.50597&partnerID=40&md5=0224148b803b7fd434913140c72f528d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6124
Appears in Collections:气候减缓与适应

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作者单位: Scripps Institution of Oceanography, University of California, 9500 Gilman Dr., San Diego, CA 92093-0224, United States

Recommended Citation:
Kooperman G.J.,Pritchard M.S.,Somerville R.C.J.. Robustness and sensitivities of central U.S. summer convection in the super-parameterized CAM: Multi-model intercomparison with a new regional EOF index[J]. Geophysical Research Letters,2013-01-01,40(12).
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