气候变化领域集成服务门户(CCPortal): Influence of Intraseasonal Variability on the Development of Monsoon Depressions

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DOI	10.1029/2020GL090425
	Influence of Intraseasonal Variability on the Development of Monsoon Depressions
	Karmakar N.; Boos W.R.; Misra V.
发表日期	2021
ISSN	0094-8276
卷号	48 期号:2
英文摘要	Previous studies showed that the activity of monsoon low-pressure systems (LPS), which produce a large fraction of the South Asian monsoon's total rainfall, is modulated by intraseasonal variability. Using satellite-derived products and atmospheric reanalyzes, this study examines how the boreal summer intraseasonal oscillation (ISO) separately modulates the occurrence of weaker LPS (lows) and stronger LPS (depressions). It is found that the genesis of lows is insensitive to ISO phase, while depressions exhibit a strong preference for genesis during the phase that is convectively active over the northern Indian Ocean. Essentially, development of LPS into depressions depends upon the timing of genesis of the initial disturbance. Evidence is presented supporting the hypothesis that the development of lows into depressions is fostered by large-scale atmospheric conditions governed by the ISO. Results also suggest that while lows have no preference for forming over ocean compared to land, depressions mostly form over ocean. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Atmospheric thermodynamics; Atmospheric conditions; Boreal summer intraseasonal oscillation; Derived products; Intraseasonal variability; Low pressure systems; Monsoon depressions; Northern indian oceans; Total rainfall; Tropical engineering
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169216
作者单位	Earth, Ocean and Atmospheric Science Department, Florida State University, Tallahassee, FL, United States; Now at Indian Institute of Tropical Meteorology, Pune, Maharashtra, India; Now at National Centre for Medium Range Weather Forecasting, Ministry of Earth Sciences, Noida, Uttar Pradesh, India; Department of Earth and Planetary Science, University of California, Berkeley, CA, United States; Climate and Ecosystem Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Center for Ocean-Atmospheric Prediction Studies, Florida State University, Tallahassee, FL, United States; Florida Climate Institute, Florida State University, Tallahassee, FL, United States
推荐引用方式 GB/T 7714	Karmakar N.,Boos W.R.,Misra V.. Influence of Intraseasonal Variability on the Development of Monsoon Depressions[J],2021,48(2).
APA	Karmakar N.,Boos W.R.,&Misra V..(2021).Influence of Intraseasonal Variability on the Development of Monsoon Depressions.Geophysical Research Letters,48(2).
MLA	Karmakar N.,et al."Influence of Intraseasonal Variability on the Development of Monsoon Depressions".Geophysical Research Letters 48.2(2021).