DOI: 10.1007/s00382-016-2989-7
Scopus记录号: 2-s2.0-84958752217
论文题名: Intraseasonal variability of the Indian summer monsoon: wet and dry events in COSMO-CLM
作者: Befort D.J. ; Leckebusch G.C. ; Cubasch U.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 47, 期: 2017-07-08 起始页码: 2635
结束页码: 2651
语种: 英语
英文关键词: Extreme events
; Indian summer monsoon
; Intraseasonal variability
; Regional climate modeling
英文摘要: This study aims to validate the widely used regional climate model COSMO-CLM driven by ERA-Interim reanalysis data with a spatial resolution of 55 km with respect to observed features of the intraseasonal variability of the Indian summer monsoon (ISM) during the period 1979 until 2011. One of these features is the northward propagation of the ISM intraseasonal oscillations. We find, that the temporal evolution between model and observation is in good agreement, while less agreement with respect to the strength is found. Furthermore, the model’s capability to simulate observed dry and wet events on a weekly time-scale is investigated using the standardized precipitation index. In general, the model is capable to simulate these events with a similar magnitude at the same time. Observational based analyses show, that the coupling between atmospheric circulation anomalies and rainfall anomalies over India on the intraseasonal time scale is well represented by the model. The most important circulation anomalies for dry events are a lower tropospheric anti-cyclonic vortex over India and partly an upper tropospheric cyclonic vortex over the Pakistan region and vice versa for wet events. The model shows a slightly higher ability to simulate dry compared to wet events. Overall, this study shows that the current configuration of COSMO-CLM is able to simulate the key features of the intraseasonal variability of the Indian summer monsoon. Being aware of its limitation, COSMO-CLM is suitable to investigate possible changes of the intraseasonal variability of ISM under changed climate conditions in the past or in the future. © 2016, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53513
Appears in Collections: 过去全球变化的重建
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作者单位: School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom; Institute of Meteorology, Freie Universität Berlin, Berlin, Germany
Recommended Citation:
Befort D.J.,Leckebusch G.C.,Cubasch U.. Intraseasonal variability of the Indian summer monsoon: wet and dry events in COSMO-CLM[J]. Climate Dynamics,2016-01-01,47(2017-07-08)