DOI: 10.1007/s00382-016-3166-8
Scopus记录号: 2-s2.0-84968615968
论文题名: Model performance metrics and process diagnostics for boreal summer intraseasonal variability
作者: Neena J.M. ; Waliser D. ; Jiang X.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2017
卷: 48, 期: 2017-05-06 起始页码: 1661
结束页码: 1683
语种: 英语
英文关键词: Boreal summer intraseasonal oscillation
; Multi-model evaluation
; Process oriented diagnostic metrics
英文摘要: Representation of the boreal summer intraseasonal oscillations (BSISO) is evaluated in the 20-year climate simulations from 27 general circulation models (GCMs), produced as part of a global multi-model evaluation project coordinated to study the vertical structure and physical processes of the Madden–Julian oscillation (MJO). Model performance metrics are developed to assess the simulated BSISO characteristics, with a special focus on its northward propagation over the Asian monsoon domain. Several process-oriented diagnostics developed by the MJO community are also tested for the BSISO. Simulating the phase speed and meridional extent of BSISO northward propagation, the northwest–southeast tilted rain-band structure and the quasi-biweekly mode are identified as some of the persisting problems for many GCMs. Interestingly, many of the GCMs, which capture BSISO eastward propagation, also show good fidelity in simulating BSISO northward propagation. Meridional vertical profiles of anomalous wind, temperature and diabatic heating of BSISO are better simulated in the GCMs that simulate the northward propagation. Process-oriented diagnostics based on seasonal mean vertical shear of zonal and meridional wind, large-scale rain fraction and relative humidity are also examined, but it still remains challenge to find a process diagnostic which is strongly linked to BSISO northward propagation. The complex spatial structure and presence of multi-scale disturbances, demand the development of more focused GCM evaluation metrics and process diagnostics specifically for the BSISO. © 2016, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53315
Appears in Collections: 过去全球变化的重建
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作者单位: Joint Institute for Regional Earth System Science and Engineering, University of California, Los Angeles, CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Indian Institute of Science Education and Research, Pune, India
Recommended Citation:
Neena J.M.,Waliser D.,Jiang X.. Model performance metrics and process diagnostics for boreal summer intraseasonal variability[J]. Climate Dynamics,2017-01-01,48(2017-05-06)