DOI: 10.1007/s00382-014-2291-5
Scopus记录号: 2-s2.0-84939895727
论文题名: North Indian heavy rainfall event during June 2013: diagnostics and extended range prediction
作者: Joseph S. ; Sahai A.K. ; Sharmila S. ; Abhilash S. ; Borah N. ; Chattopadhyay R. ; Pillai P.A. ; Rajeevan M. ; Kumar A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 44, 期: 2017-07-08 起始页码: 2049
结束页码: 2065
语种: 英语
英文关键词: Climate forecast system model
; Ensemble prediction system
; Extreme events
; Indian summer monsoon
英文摘要: The Indian summer monsoon of 2013 covered the entire country by 16 June, one month earlier than its normal date. Around that period, heavy rainfall was experienced in the north Indian state of Uttarakhand, which is situated on the southern slope of Himalayan Ranges. The heavy rainfall and associated landslides caused serious damages and claimed many lives. This study investigates the scientific rationale behind the incidence of the extreme rainfall event in the backdrop of large scale monsoon environment. It is found that a monsoonal low pressure system that provided increased low level convergence and abundant moisture, and a midlatitude westerly trough that generated strong upper level divergence, interacted with each other and helped monsoon to cover the entire country and facilitated the occurrence of the heavy rainfall event in the orographic region. The study also examines the skill of an ensemble prediction system (EPS) in predicting the Uttarakhand event on extended range time scale. The EPS is implemented on both high (T382) and low (T126) resolution versions of the coupled general circulation model CFSv2. Although the models predicted the event 10–12 days in advance, they failed to predict the midlatitude influence on the event. Possible reasons for the same are also discussed. In both resolutions of the model, the event was triggered by the generation and northwestward movement of a low pressure system developed over the Bay of Bengal. The study advocates the usefulness of high resolution models in predicting extreme events. © 2014, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54227
Appears in Collections: 过去全球变化的重建
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作者单位: Indian Institute of Tropical Meteorology, Dr. Homi Bhabha Road, Pashan, Pune, India; Earth System Science Organization/Ministry of Earth Sciences, Prithvi Bhavan, New Delhi, India; National Center for Environmental Prediction, Camp Springs, MD, United States
Recommended Citation:
Joseph S.,Sahai A.K.,Sharmila S.,et al. North Indian heavy rainfall event during June 2013: diagnostics and extended range prediction[J]. Climate Dynamics,2015-01-01,44(2017-07-08)