Relationship between Azores High and Indian summer monsoon

Abstract A dominant mode of interannual variability of Indian summer monsoon rainfall shows west-east dipole pattern with above normal rainfall towards west and central India and subdued rainfall towards the east and northeast India, and is related to the vigorous Azores High. The vigorous Azores Hi...

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Autor principal:	Ramesh Kumar Yadav
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Environmental sciences GE1-350 Meteorology. Climatology QC851-999
Acceso en línea:	https://doaj.org/article/435f46e054674f3ebc60f15dfa69fecf
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spelling	oai:doaj.org-article:435f46e054674f3ebc60f15dfa69fecf2021-12-02T13:40:57ZRelationship between Azores High and Indian summer monsoon10.1038/s41612-021-00180-z2397-3722https://doaj.org/article/435f46e054674f3ebc60f15dfa69fecf2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41612-021-00180-zhttps://doaj.org/toc/2397-3722Abstract A dominant mode of interannual variability of Indian summer monsoon rainfall shows west-east dipole pattern with above normal rainfall towards west and central India and subdued rainfall towards the east and northeast India, and is related to the vigorous Azores High. The vigorous Azores High is accompanied by enhanced subsidence resulting in well-built widespread upper-troposphere convergence. This forms the meridional vorticity dipole consisting of anomalous cyclonic and anti-cyclonic circulation at 30°N and 50°N, respectively, and boosts the Rossby wave source. The cascading down Rossby wave train imposes successive negative, positive and negative Geopotential height (GPH) anomalies over north Mediterranean, northwest and northeast of India, respectively. The negative GPH anomaly at the north Mediterranean increases the Asian jet towards the Caspian Sea, strengthening the monsoon circulation through the ‘silk-road’ pattern. While, the dipole GPH anomaly north of India shift the Tibetan High westwards, triggering monsoon activity towards the west.Ramesh Kumar YadavNature PortfolioarticleEnvironmental sciencesGE1-350Meteorology. ClimatologyQC851-999ENnpj Climate and Atmospheric Science, Vol 4, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Environmental sciences GE1-350 Meteorology. Climatology QC851-999
spellingShingle	Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Ramesh Kumar Yadav Relationship between Azores High and Indian summer monsoon
description	Abstract A dominant mode of interannual variability of Indian summer monsoon rainfall shows west-east dipole pattern with above normal rainfall towards west and central India and subdued rainfall towards the east and northeast India, and is related to the vigorous Azores High. The vigorous Azores High is accompanied by enhanced subsidence resulting in well-built widespread upper-troposphere convergence. This forms the meridional vorticity dipole consisting of anomalous cyclonic and anti-cyclonic circulation at 30°N and 50°N, respectively, and boosts the Rossby wave source. The cascading down Rossby wave train imposes successive negative, positive and negative Geopotential height (GPH) anomalies over north Mediterranean, northwest and northeast of India, respectively. The negative GPH anomaly at the north Mediterranean increases the Asian jet towards the Caspian Sea, strengthening the monsoon circulation through the ‘silk-road’ pattern. While, the dipole GPH anomaly north of India shift the Tibetan High westwards, triggering monsoon activity towards the west.
format	article
author	Ramesh Kumar Yadav
author_facet	Ramesh Kumar Yadav
author_sort	Ramesh Kumar Yadav
title	Relationship between Azores High and Indian summer monsoon
title_short	Relationship between Azores High and Indian summer monsoon
title_full	Relationship between Azores High and Indian summer monsoon
title_fullStr	Relationship between Azores High and Indian summer monsoon
title_full_unstemmed	Relationship between Azores High and Indian summer monsoon
title_sort	relationship between azores high and indian summer monsoon
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/435f46e054674f3ebc60f15dfa69fecf
work_keys_str_mv	AT rameshkumaryadav relationshipbetweenazoreshighandindiansummermonsoon
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Relationship between Azores High and Indian summer monsoon

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