globalchange  > 气候减缓与适应
DOI: 10.1175/JCLI-D-17-0332.1
Scopus记录号: 2-s2.0-85047084658
论文题名:
Dynamics-oriented diagnostics for the Madden-Julian oscillation
作者: Wang B.; Lee S.-S.; Waliser D.E.; Zhang C.; Sobel A.; Maloney E.; Li T.; Jiang X.; Ha K.-J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期:8
起始页码: 3117
结束页码: 3135
语种: 英语
英文关键词: Diagnostics ; Dynamics ; Intraseasonal variability ; Madden-Julian oscillation ; Model evaluation/performance
Scopus关键词: Boundary layers ; Climate models ; Crack propagation ; Dynamics ; Plasma diagnostics ; Potential energy ; Precipitation (meteorology) ; Comprehensive assessment ; Convective instabilities ; Intraseasonal variability ; Longitudinal distribution ; Madden-Julian oscillation ; Model evaluation/performance ; Thermodynamic structures ; Three-dimensional dynamics ; Climatology ; atmospheric dynamics ; atmospheric general circulation model ; diabatic process ; heating ; Madden-Julian oscillation ; seasonal variation ; thermodynamics ; troposphere
英文摘要: Realistic simulations of the Madden-Julian oscillation (MJO) by global climate models (GCMs) remain a great challenge. To evaluate GCM simulations of the MJO, the U.S. CLIVAR MJO Working Group developed a standardized set of diagnostics, providing a comprehensive assessment of statistical properties of the MJO. Here, a suite of complementary diagnostics has been developed that provides discrimination and assessment of MJO simulations based on the perception that the MJO propagation has characteristic dynamic and thermodynamic structures. The new dynamics-oriented diagnostics help to evaluate whether a model produces eastward-propagating MJOs for the right reasons. The diagnostics include 1) the horizontal structure of boundary layer moisture convergence (BLMC) that moistens the lower troposphere to the east of a convection center, 2) the preluding eastward propagation of BLMC that leads the propagation of MJO precipitation by about 5 days, 3) the horizontal structure of 850-hPa zonal wind and its equatorial asymmetry (Kelvin easterly versus Rossby westerly intensity), 4) the equatorial vertical-longitudinal structure of the equivalent potential temperature and convective instability index that reflects the premoistening and predestabilization processes, 5) the equatorial vertical-longitudinal distribution of diabatic heating that reflects the multicloud structure of the MJO, 6) the upper-level divergence that reflects the influence of stratiform cloud heating, and 7) the MJO available potential energy generation that reflects the amplification and propagation of an MJO. The models that simulate better three-dimensional dynamic and thermodynamic structures of MJOs generally reproduce better eastward propagations. This evaluation identifies a number of shortcomings in representing dynamical and heating processes relevant to the MJO simulation and reveals potential sources of the shortcomings. © 2018 American Meteorological Society.
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被引频次[WOS]:47   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111588
Appears in Collections:气候减缓与适应

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作者单位: Department of Atmospheric Sciences, International Pacific Research Center, University of Hawai'i at Manoa, Honolulu, HI, United States; Earth System Modeling Center, Nanjing University of Information Science and Technology, Nanjing, China; Center for Climate Physics, Institute for Basic Science, Busan, South Korea; Pusan National University, Busan, South Korea; Joint Institute for Regional Earth System Science and Engineering, University of California, Los Angeles, Los Angeles, CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, WA, United States; Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Department of Earth and Environmental Sciences, Columbia University, New York, NY, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States; Department of Atmospheric Sciences, Pusan National University, Busan, South Korea

Recommended Citation:
Wang B.,Lee S.-S.,Waliser D.E.,et al. Dynamics-oriented diagnostics for the Madden-Julian oscillation[J]. Journal of Climate,2018-01-01,31(8)
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