Dual response of Arabian Sea cyclones and strength of Indian monsoon to Southern Atlantic Ocean
Variability and trends of the south Asian monsoon at different time scales makes the region susceptible to climate-related natural disasters such as droughts and floods. Because of its importance, different studies have examined the climatic factors responsible for the recent changes in monsoon stre...
Published in: | Climate Dynamics |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | https://biblio.ugent.be/publication/8722808 http://hdl.handle.net/1854/LU-8722808 https://doi.org/10.1007/s00382-020-05577-9 https://biblio.ugent.be/publication/8722808/file/8724570 |
id |
ftunivgent:oai:archive.ugent.be:8722808 |
---|---|
record_format |
openpolar |
spelling |
ftunivgent:oai:archive.ugent.be:8722808 2023-06-11T04:16:41+02:00 Dual response of Arabian Sea cyclones and strength of Indian monsoon to Southern Atlantic Ocean Hari, Vittal Pathak, Amey Koppa, Akash 2021 application/pdf https://biblio.ugent.be/publication/8722808 http://hdl.handle.net/1854/LU-8722808 https://doi.org/10.1007/s00382-020-05577-9 https://biblio.ugent.be/publication/8722808/file/8724570 eng eng https://biblio.ugent.be/publication/8722808 http://hdl.handle.net/1854/LU-8722808 http://dx.doi.org/10.1007/s00382-020-05577-9 https://biblio.ugent.be/publication/8722808/file/8724570 Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) info:eu-repo/semantics/openAccess CLIMATE DYNAMICS ISSN: 0930-7575 ISSN: 1432-0894 Earth and Environmental Sciences Arabian Sea cyclones Indian summer monsoon rainfall South Atlantic Ocean SUMMER MONSOON TROPICAL CYCLONES RELATIVE IMPORTANCE RAINFALL EXTREMES ZONAL MODE VARIABILITY CLIMATOLOGY DEPRESSIONS FREQUENCY AFRICAN journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2021 ftunivgent https://doi.org/10.1007/s00382-020-05577-9 2023-04-19T22:10:11Z Variability and trends of the south Asian monsoon at different time scales makes the region susceptible to climate-related natural disasters such as droughts and floods. Because of its importance, different studies have examined the climatic factors responsible for the recent changes in monsoon strength. Here, using observations and climate model experiments we show that monsoon strength is driven by the variations of south Atlantic Ocean sea surface temperature (SASST). The mechanism by which SASST is modulating the monsoon could be explained through the classical Matsuno-Gill response, leading to changes in the characteristics of vertical wind shear in the Arabian Sea. The decline in the vertical wind shear to the warming of SASST is associated with anomalous lower (upper)-level easterlies (westerlies). This further leads to a strong increase in the frequency of the Arabian Sea cyclones; and also prohibits the transport of moisture to the Indian landmass, which eventually reduces the strength of monsoon. The conditions in the SASST which drove these responses are aggravated by greenhouse gas emission, revealing the prominent role played by anthropogenic warming. If, with proper mitigation, these emissions are not prevented, further increases in the SASST is expected to result in increased Arabian sea cyclones and reduced monsoon strength. Article in Journal/Newspaper South Atlantic Ocean Ghent University Academic Bibliography Indian Climate Dynamics 56 7-8 2149 2161 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Earth and Environmental Sciences Arabian Sea cyclones Indian summer monsoon rainfall South Atlantic Ocean SUMMER MONSOON TROPICAL CYCLONES RELATIVE IMPORTANCE RAINFALL EXTREMES ZONAL MODE VARIABILITY CLIMATOLOGY DEPRESSIONS FREQUENCY AFRICAN |
spellingShingle |
Earth and Environmental Sciences Arabian Sea cyclones Indian summer monsoon rainfall South Atlantic Ocean SUMMER MONSOON TROPICAL CYCLONES RELATIVE IMPORTANCE RAINFALL EXTREMES ZONAL MODE VARIABILITY CLIMATOLOGY DEPRESSIONS FREQUENCY AFRICAN Hari, Vittal Pathak, Amey Koppa, Akash Dual response of Arabian Sea cyclones and strength of Indian monsoon to Southern Atlantic Ocean |
topic_facet |
Earth and Environmental Sciences Arabian Sea cyclones Indian summer monsoon rainfall South Atlantic Ocean SUMMER MONSOON TROPICAL CYCLONES RELATIVE IMPORTANCE RAINFALL EXTREMES ZONAL MODE VARIABILITY CLIMATOLOGY DEPRESSIONS FREQUENCY AFRICAN |
description |
Variability and trends of the south Asian monsoon at different time scales makes the region susceptible to climate-related natural disasters such as droughts and floods. Because of its importance, different studies have examined the climatic factors responsible for the recent changes in monsoon strength. Here, using observations and climate model experiments we show that monsoon strength is driven by the variations of south Atlantic Ocean sea surface temperature (SASST). The mechanism by which SASST is modulating the monsoon could be explained through the classical Matsuno-Gill response, leading to changes in the characteristics of vertical wind shear in the Arabian Sea. The decline in the vertical wind shear to the warming of SASST is associated with anomalous lower (upper)-level easterlies (westerlies). This further leads to a strong increase in the frequency of the Arabian Sea cyclones; and also prohibits the transport of moisture to the Indian landmass, which eventually reduces the strength of monsoon. The conditions in the SASST which drove these responses are aggravated by greenhouse gas emission, revealing the prominent role played by anthropogenic warming. If, with proper mitigation, these emissions are not prevented, further increases in the SASST is expected to result in increased Arabian sea cyclones and reduced monsoon strength. |
format |
Article in Journal/Newspaper |
author |
Hari, Vittal Pathak, Amey Koppa, Akash |
author_facet |
Hari, Vittal Pathak, Amey Koppa, Akash |
author_sort |
Hari, Vittal |
title |
Dual response of Arabian Sea cyclones and strength of Indian monsoon to Southern Atlantic Ocean |
title_short |
Dual response of Arabian Sea cyclones and strength of Indian monsoon to Southern Atlantic Ocean |
title_full |
Dual response of Arabian Sea cyclones and strength of Indian monsoon to Southern Atlantic Ocean |
title_fullStr |
Dual response of Arabian Sea cyclones and strength of Indian monsoon to Southern Atlantic Ocean |
title_full_unstemmed |
Dual response of Arabian Sea cyclones and strength of Indian monsoon to Southern Atlantic Ocean |
title_sort |
dual response of arabian sea cyclones and strength of indian monsoon to southern atlantic ocean |
publishDate |
2021 |
url |
https://biblio.ugent.be/publication/8722808 http://hdl.handle.net/1854/LU-8722808 https://doi.org/10.1007/s00382-020-05577-9 https://biblio.ugent.be/publication/8722808/file/8724570 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
CLIMATE DYNAMICS ISSN: 0930-7575 ISSN: 1432-0894 |
op_relation |
https://biblio.ugent.be/publication/8722808 http://hdl.handle.net/1854/LU-8722808 http://dx.doi.org/10.1007/s00382-020-05577-9 https://biblio.ugent.be/publication/8722808/file/8724570 |
op_rights |
Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1007/s00382-020-05577-9 |
container_title |
Climate Dynamics |
container_volume |
56 |
container_issue |
7-8 |
container_start_page |
2149 |
op_container_end_page |
2161 |
_version_ |
1768375164942155776 |