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DOI | 10.1029/2020GL088403 |
Large-Scale Extreme Rainfall-Producing Synoptic Systems of the Indian Summer Monsoon | |
Nikumbh, Akshaya C.1,2,3; Chakraborty, Arindam1,2; Bhat, G. S.1,2; Frierson, Dargan M. W.3 | |
2020-05-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2020 |
卷号 | 47期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | India; USA |
英文摘要 | In recent years India has been increasingly experiencing widespread floods induced by large-scale extreme rainfall events (LEREs). LEREs are mainly associated with monsoon low-pressure systems (LPS). The forecast of these high-flood-potential events, however, has remained challenging. Here, we compare LPSs of the summer monsoon that led to LEREs (LPS-Lg) and strong LPSs that did not result in LEREs (LPS-noLg) over central India for the period 1979-2012. We show that having a strong LPS is not a sufficient condition to produce LEREs, and the LPS-Lgs are accompanied by secondary cyclonic vortices (SCVs). The simultaneous existence of an LPS and an SCV creates a giant midtropospheric vortex. SCVs enhance dynamic lifting, static instability, and moisture transport from the Arabian Sea that precondition the atmosphere for deep convection. SCVs also slow down the propagation of LPSs. We show that the interaction of synoptic-scale systems can lead to LEREs even if individual systems are not strong enough. |
英文关键词 | extreme rainfall events low-pressure systems interaction of cyclonic vortices |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000543387400007 |
WOS关键词 | INTRASEASONAL VARIABILITY ; COMPOSITE STRUCTURE ; INCREASING TREND ; WATER-VAPOR ; PRECIPITATION ; CLIMATE ; EVENTS ; VORTEX ; FLOOD ; MIDLATITUDE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
URL | 查看原文 |
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/267584 |
专题 | 气候变化 |
作者单位 | 1.Indian Inst Sci, Ctr Atmospher & Ocean Sci, Bangalore, Karnataka, India; 2.Indian Inst Sci, Divecha Ctr Climate Change, Bangalore, Karnataka, India; 3.Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA |
推荐引用方式 GB/T 7714 | Nikumbh, Akshaya C.,Chakraborty, Arindam,Bhat, G. S.,et al. Large-Scale Extreme Rainfall-Producing Synoptic Systems of the Indian Summer Monsoon[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(11). |
APA | Nikumbh, Akshaya C.,Chakraborty, Arindam,Bhat, G. S.,&Frierson, Dargan M. W..(2020).Large-Scale Extreme Rainfall-Producing Synoptic Systems of the Indian Summer Monsoon.GEOPHYSICAL RESEARCH LETTERS,47(11). |
MLA | Nikumbh, Akshaya C.,et al."Large-Scale Extreme Rainfall-Producing Synoptic Systems of the Indian Summer Monsoon".GEOPHYSICAL RESEARCH LETTERS 47.11(2020). |
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