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DOI | 10.1175/JAS-D-17-0113.1 |
Improved Tropical Modes of Variability in the NCEP Climate Forecast System (Version 2) via a Stochastic Multicloud Model | |
Goswami, B. B.1; Khouider, B.1; Phani, R.2; Mukhopadhyay, P.2; Majda, A. J.3,4,5 | |
2017-10-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:10 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; India; USA; U Arab Emirates |
英文摘要 | A stochastic multicloud model (SMCM) convective parameterization, which mimics the interactions at subgrid scales of multiple cloud types, is incorporated into the National Centers for Environmental Prediction (NCEP) Climate Forecast System, version 2 (CFSv2), model (CFSsmcm) in lieu of the preexisting simplified Arakawa-Schubert (SAS) cumulus scheme. A detailed analysis of the tropical intraseasonal variability (TISV) and convectively coupled equatorial waves (CCEW) in comparison with the original (control) model and with observations is presented here. The last 10 years of a 15-yr-long climate simulation are analyzed. Significant improvements are seen in the simulation of the Madden-Julian oscillation (MJO) and most of the CCEWs as well as the Indian summer monsoon (ISM) intraseasonal oscillation (MISO). These improvements appear in the form of improved morphology and physical features of these waves. This can be regarded as a validation of the central idea behind the SMCM according to which organized tropical convection is based on three cloud types, namely, the congestus, deep, and stratiform cloud decks, that interact with each other and form a building block for multiscale convective systems. An adequate accounting of the dynamical interactions of this cloud hierarchy thus constitutes an important requirement for cumulus parameterizations to succeed in representing atmospheric tropical variability. SAS fails to fulfill this requirement, which is evident in the unrealistic physical structures of the major intraseasonal modes simulated by CFSv2 as documented here. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000417993900002 |
WOS关键词 | MADDEN-JULIAN OSCILLATION ; GENERAL-CIRCULATION MODELS ; SHALLOW CUMULUS CLOUDS ; INDIAN-SUMMER MONSOON ; CONVECTIVELY COUPLED WAVES ; ENSEMBLE PREDICTION SYSTEM ; RESOLUTION AQUAPLANET GCM ; INTRASEASONAL OSCILLATIONS ; WESTERN PACIFIC ; LIFE-CYCLE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29225 |
专题 | 地球科学 |
作者单位 | 1.Univ Victoria, Dept Math & Stat, Victoria, BC, Canada; 2.Indian Inst Trop Meteorol, Pune, Maharashtra, India; 3.NYU, Courant Inst Math Sci, Dept Math, New York, NY USA; 4.NYU, Courant Inst Math Sci, Ctr Atmosphere Ocean Sci, New York, NY USA; 5.New York Univ Abu Dhabi, Ctr Prototype Climate Models, Abu Dhabi, U Arab Emirates |
推荐引用方式 GB/T 7714 | Goswami, B. B.,Khouider, B.,Phani, R.,et al. Improved Tropical Modes of Variability in the NCEP Climate Forecast System (Version 2) via a Stochastic Multicloud Model[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(10). |
APA | Goswami, B. B.,Khouider, B.,Phani, R.,Mukhopadhyay, P.,&Majda, A. J..(2017).Improved Tropical Modes of Variability in the NCEP Climate Forecast System (Version 2) via a Stochastic Multicloud Model.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(10). |
MLA | Goswami, B. B.,et al."Improved Tropical Modes of Variability in the NCEP Climate Forecast System (Version 2) via a Stochastic Multicloud Model".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.10(2017). |
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