The role of local heating in the 2015 Indian Heat Wave

Abstract India faced a major heat wave during the summer of 2015. Temperature anomalies peaked in the dry period before the onset of the summer monsoon, suggesting that local land-atmosphere feedbacks involving desiccated soils and vegetation might have played a role in driving the heat extreme. Upo...

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Autores principales:	Debjani Ghatak, Benjamin Zaitchik, Christopher Hain, Martha Anderson
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/87faee94aa354ffc8242e566871ccef1
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spelling	oai:doaj.org-article:87faee94aa354ffc8242e566871ccef12021-12-02T12:32:32ZThe role of local heating in the 2015 Indian Heat Wave10.1038/s41598-017-07956-52045-2322https://doaj.org/article/87faee94aa354ffc8242e566871ccef12017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07956-5https://doaj.org/toc/2045-2322Abstract India faced a major heat wave during the summer of 2015. Temperature anomalies peaked in the dry period before the onset of the summer monsoon, suggesting that local land-atmosphere feedbacks involving desiccated soils and vegetation might have played a role in driving the heat extreme. Upon examination of in situ data, reanalysis, satellite observations, and land surface models, we find that the heat wave included two distinct peaks: one in late May, and a second in early June. During the first peak we find that clear skies led to a positive net radiation anomaly at the surface, but there is no significant sensible heat flux anomaly within the core of the heat wave affected region. By the time of the second peak, however, soil moisture had dropped to anomalously low levels in the core heat wave region, net surface radiation was anomalously high, and a significant positive sensible heat flux anomaly developed. This led to a substantial local forcing on air temperature that contributed to the intensity of the event. The analysis indicates that the highly agricultural landscape of North and Central India can reinforce heat extremes under dry conditions.Debjani GhatakBenjamin ZaitchikChristopher HainMartha AndersonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Debjani Ghatak Benjamin Zaitchik Christopher Hain Martha Anderson The role of local heating in the 2015 Indian Heat Wave
description	Abstract India faced a major heat wave during the summer of 2015. Temperature anomalies peaked in the dry period before the onset of the summer monsoon, suggesting that local land-atmosphere feedbacks involving desiccated soils and vegetation might have played a role in driving the heat extreme. Upon examination of in situ data, reanalysis, satellite observations, and land surface models, we find that the heat wave included two distinct peaks: one in late May, and a second in early June. During the first peak we find that clear skies led to a positive net radiation anomaly at the surface, but there is no significant sensible heat flux anomaly within the core of the heat wave affected region. By the time of the second peak, however, soil moisture had dropped to anomalously low levels in the core heat wave region, net surface radiation was anomalously high, and a significant positive sensible heat flux anomaly developed. This led to a substantial local forcing on air temperature that contributed to the intensity of the event. The analysis indicates that the highly agricultural landscape of North and Central India can reinforce heat extremes under dry conditions.
format	article
author	Debjani Ghatak Benjamin Zaitchik Christopher Hain Martha Anderson
author_facet	Debjani Ghatak Benjamin Zaitchik Christopher Hain Martha Anderson
author_sort	Debjani Ghatak
title	The role of local heating in the 2015 Indian Heat Wave
title_short	The role of local heating in the 2015 Indian Heat Wave
title_full	The role of local heating in the 2015 Indian Heat Wave
title_fullStr	The role of local heating in the 2015 Indian Heat Wave
title_full_unstemmed	The role of local heating in the 2015 Indian Heat Wave
title_sort	role of local heating in the 2015 indian heat wave
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/87faee94aa354ffc8242e566871ccef1
work_keys_str_mv	AT debjanighatak theroleoflocalheatinginthe2015indianheatwave AT benjaminzaitchik theroleoflocalheatinginthe2015indianheatwave AT christopherhain theroleoflocalheatinginthe2015indianheatwave AT marthaanderson theroleoflocalheatinginthe2015indianheatwave AT debjanighatak roleoflocalheatinginthe2015indianheatwave AT benjaminzaitchik roleoflocalheatinginthe2015indianheatwave AT christopherhain roleoflocalheatinginthe2015indianheatwave AT marthaanderson roleoflocalheatinginthe2015indianheatwave
_version_	1718394045731962880

The role of local heating in the 2015 Indian Heat Wave

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