Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/joc.5390 |
The role of monsoon low-level jet in modulating heavy rainfall events | |
Xavier, Anu1; Kottayil, Ajil2; Mohanakumar, K.2; Xavier, Prince K.3 | |
2018-04-01 | |
发表期刊 | INTERNATIONAL JOURNAL OF CLIMATOLOGY |
ISSN | 0899-8418 |
EISSN | 1097-0088 |
出版年 | 2018 |
卷号 | 38页码:E569-E576 |
文章类型 | Article |
语种 | 英语 |
国家 | India; England |
英文摘要 | Monsoon low-level jet (MLLJ) is an important component of Asian summer monsoon circulation, which is responsible for large-scale distribution and variability of rainfall over the Indian subcontinent. The evolution of MLLJ characteristics prior to heavy rainfall days and its changes which lead to instances of heavy rainfall over the south-western coast of India are studied. The European Centre for Medium Range Weather Forecasts (ECMWF) re-analysis data and India Meteorological Department (IMD) rainfall data during 1979-2007 were used for this study. It is found that the MLLJ core speed, westerly wind depth, zonal water vapour flux, horizontal wind shear and cyclonic vorticity show a steady increase towards the day of heavy rainfall and gradually decrease thereafter. The intensification of these parameters not only brings in abundant moisture but also triggers convection, thereby resulting in the formation of heavy rainfall during monsoon season. The large-scale advection of moisture brought about by strengthening of MLLJ is shown to be a prerequisite for heavy rainfall over the Indian subcontinent. An interesting result of this study is that heavy rainfall days may have some predictability by continuous monitoring of the progression of MLLJ. |
英文关键词 | monsoon low-level jet extreme rainfall moisture flux |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000431999600038 |
WOS关键词 | INDIAN-SUMMER MONSOON ; INCREASING TREND ; VARIABILITY ; MOUNTAINS ; TRANSPORT ; STREAM ; FLOW |
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/36713 |
专题 | 气候变化 |
作者单位 | 1.Cochin Univ Sci & Technol, Dept Atmospher Sci, Cochin, Kerala, India; 2.Cochin Univ Sci & Technol, Adv Ctr Atmospher Radar Res, Cochin 682022, Kerala, India; 3.Met Off Hadley Ctr, Exeter, Devon, England |
推荐引用方式 GB/T 7714 | Xavier, Anu,Kottayil, Ajil,Mohanakumar, K.,et al. The role of monsoon low-level jet in modulating heavy rainfall events[J]. INTERNATIONAL JOURNAL OF CLIMATOLOGY,2018,38:E569-E576. |
APA | Xavier, Anu,Kottayil, Ajil,Mohanakumar, K.,&Xavier, Prince K..(2018).The role of monsoon low-level jet in modulating heavy rainfall events.INTERNATIONAL JOURNAL OF CLIMATOLOGY,38,E569-E576. |
MLA | Xavier, Anu,et al."The role of monsoon low-level jet in modulating heavy rainfall events".INTERNATIONAL JOURNAL OF CLIMATOLOGY 38(2018):E569-E576. |
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