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Spatial and Temporal Analysis of Precipitation Extremities of Eastern Nepal in the Last Two Decades (1997-2016)
Subba, S (Subba, Sunil)1,2; Ma, YM (Ma, Yaoming)1,2,3; Ma, WQ (Ma, Weiqiang)1,2,3
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
2019
Volume124Issue:14Pages:7523-7539
DOI10.1029/2019JD030639
Abstract

In recent days there have been discussions regarding the impact of climate change and its vagaries of the weather, particularly concerning extreme events. Nepal, being a mountainous country, is more susceptible to precipitation extreme events and related hazards, which hinder the socioeconomic development of the nation. In this regard, this study aimed to address this phenomenon for one of the most naturally and socioeconomically important regions of Nepal, namely, Eastern Nepal. The data were collected for the period of 1997 to 2016. The interdecadal comparison for two periods (1997-2006 and 2007-2016) was maintained for the calculation of extreme precipitation indices as per recommended by Expert Team on Climate Change Detection and Indices. Linear trends were calculated by using Mann-Kendall and Sen's Slope estimator. The average annual precipitation was found to be decreasing at an alarming rate of -20 mm/year in the last two decades' tenure. In case of extreme precipitation events, consecutive dry days, one of the frequency indices, showed a solo increase in its trend (mostly significant). Meanwhile, all the intensity indices of extreme precipitation showed decreasing trends (mostly insignificant). Thus, it can be concluded that Eastern Nepal has witnessed some significant drier days in the last two decades, as the events of heavy, very heavy, extremely heavy precipitation events, and annual wet day precipitation (PRCPTOT) were found to be decreasing. The same phenomena were also seen in the Tropical Rainfall Measuring Mission 3B42 V7 satellite precipitation product for whole Nepal.

Subject AreaAtmospheric Sciences
WOS IDWOS:000481444200005
Language英语
Indexed BySCI
KeywordWater-resources Management Koshi River-basin Climate-change Rainfall Trends Temperature Himalaya Reconstruction Variability Products Slopes
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
Cooperation Status国内
ISSN2169-897X
Department环境变化与地表过程重点实验室
URL查看原文
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9227
Collection图书馆
Corresponding AuthorMa, YM (Ma, Yaoming)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing, Peoples R China;
2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China;
3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China.
Recommended Citation
GB/T 7714
Subba, S ,Ma, YM ,Ma, WQ . Spatial and Temporal Analysis of Precipitation Extremities of Eastern Nepal in the Last Two Decades (1997-2016)[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(14):7523-7539.
APA Subba, S ,Ma, YM ,&Ma, WQ .(2019).Spatial and Temporal Analysis of Precipitation Extremities of Eastern Nepal in the Last Two Decades (1997-2016).JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(14),7523-7539.
MLA Subba, S ,et al."Spatial and Temporal Analysis of Precipitation Extremities of Eastern Nepal in the Last Two Decades (1997-2016)".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.14(2019):7523-7539.
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