气候变化领域集成服务门户(CCPortal): Hydroclimatic teleconnections of large-scale oceanic-atmospheric circulations on hydrometeorological extremes of Tapi Basin, India

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DOI	10.1016/j.atmosres.2019.104791
	Hydroclimatic teleconnections of large-scale oceanic-atmospheric circulations on hydrometeorological extremes of Tapi Basin, India
	Sharma P.J.; Patel P.L.; Jothiprakash V.
发表日期	2020
ISSN	0169-8095
卷号	235
英文摘要	Current study presents an integrated approach to assess the hydroclimatic teleconnections of large-scale coupled oceanic-atmospheric circulations on basin-scale extreme rainfall and streamflow indices for climatologically sensitive Tapi basin, India. The trend analysis of rainfall extremes revealed spatial heterogeneity across the basin. The coastal and mountainous regions of Lower and Upper Tapi basins respectively experienced wet conditions, while the plains of Middle and Upper Tapi (Purna sub-catchment) basins exhibited drier conditions during the analysis. The decreasing trend in high streamflow indices (except for Burhanpur sub-catchment) and significant increasing trend in low flow days (except for Lower Tapi basin) are observed, indicating the dominance of drier and moisture deficient conditions across Tapi basin. The hydroclimatic teleconnections of large-scale oceanic-atmospheric circulations of tropical Pacific and equatorial Indian Ocean regions, i.e., El Niño-Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) respectively, with hydrometeorological extremes in Tapi basin for the concurrent period are investigated. As Indian summer monsoon rainfall (ISMR) and Tapi basin monsoon rainfall (TBMR) shows explained variance of around 42%, the influences of ENSO and IOD circulations on TBMR may be asymmetric with ISMR. The anomalous warming of the Indian Ocean, i.e., positive IOD (pIOD), and co-occurrence of pIOD and weak El Niño conditions, are associated with higher flood risk across the basin vis-à-vis other ENSO and IOD conditions. On other hand, the effects of ENSO and IOD are not apparent on low flow days, as the anthropogenic changes in the basin including streamflow regulations have considerably influenced the low flow regimes. The time interlocking between ENSO-IOD conditions and streamflow extremes in Tapi basin is further envisaged by performing a lead-lag correlation analysis. © 2019 Elsevier B.V.
英文关键词	El Niño-Southern Oscillation; Hydroclimatic teleconnections; Hydrometeorological extremes; Indian Ocean Dipole; Tapi basin
学科领域	Atmospheric pressure; Atmospheric thermodynamics; Catchments; Flood control; Floods; Oceanography; Rain; Runoff; Stream flow; Hydrometeorological extremes; Indian Ocean dipole; Southern oscillation; Tapi basin; Teleconnections; Climatology; air-sea interaction; atmospheric circulation; El Nino-Southern Oscillation; extreme event; hydrometeorology; Indian Ocean Dipole; oceanic circulation; teleconnection; India; Tapi Basin
语种	英语
scopus关键词	Atmospheric pressure; Atmospheric thermodynamics; Catchments; Flood control; Floods; Oceanography; Rain; Runoff; Stream flow; Hydrometeorological extremes; Indian Ocean dipole; Southern oscillation; Tapi basin; Teleconnections; Climatology; air-sea interaction; atmospheric circulation; El Nino-Southern Oscillation; extreme event; hydrometeorology; Indian Ocean Dipole; oceanic circulation; teleconnection; India; Tapi Basin
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120493
作者单位	Centre of Excellence on ‘Water Resources and Flood Management’, Department of Civil Engineering, Sardar Vallabhbhai National Institute of Technology Surat, Surat, 395007, India; Department of Civil Engineering, Indian Institute of Technology Bombay, Mumbai, 400076, India
推荐引用方式 GB/T 7714	Sharma P.J.,Patel P.L.,Jothiprakash V.. Hydroclimatic teleconnections of large-scale oceanic-atmospheric circulations on hydrometeorological extremes of Tapi Basin, India[J],2020,235.
APA	Sharma P.J.,Patel P.L.,&Jothiprakash V..(2020).Hydroclimatic teleconnections of large-scale oceanic-atmospheric circulations on hydrometeorological extremes of Tapi Basin, India.Atmospheric Research,235.
MLA	Sharma P.J.,et al."Hydroclimatic teleconnections of large-scale oceanic-atmospheric circulations on hydrometeorological extremes of Tapi Basin, India".Atmospheric Research 235(2020).