Reversal Asymmetry of Rainfall Change Over the Indian Ocean During the Radiative Forcing Increase and Stabilization

Abstract The rainfall responses over the Indian Ocean (IO) are investigated based on the Representative Concentration Pathways 4.5 (RCP4.5) experiments of 13 models, in which the experiments are extended to the year 2300, from the Coupled Model Intercomparison Project Phase 5 (CMIP5). During the rad...

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Autores principales:	Hongyu Hou, Xia Qu, Gang Huang
Formato:	article
Lenguaje:	EN
Publicado:	American Geophysical Union (AGU) 2021
Materias:	global warming radiative forcing stabilization simulation atmosphere‐ocean coupling ocean fast and slow responses Indian Ocean Environmental sciences GE1-350 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/bc8b33441c4d42369cbd3c8f06eadecf
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spelling	oai:doaj.org-article:bc8b33441c4d42369cbd3c8f06eadecf2021-11-23T22:36:10ZReversal Asymmetry of Rainfall Change Over the Indian Ocean During the Radiative Forcing Increase and Stabilization2328-427710.1029/2021EF002272https://doaj.org/article/bc8b33441c4d42369cbd3c8f06eadecf2021-10-01T00:00:00Zhttps://doi.org/10.1029/2021EF002272https://doaj.org/toc/2328-4277Abstract The rainfall responses over the Indian Ocean (IO) are investigated based on the Representative Concentration Pathways 4.5 (RCP4.5) experiments of 13 models, in which the experiments are extended to the year 2300, from the Coupled Model Intercomparison Project Phase 5 (CMIP5). During the radiative forcing (RF) increase, the rainfall pattern displays northwest‐southeast dipole asymmetry. After RF stabilization, rainfall increases over the southern IO and decreases over the northern IO where is a wet region in climatology. Diagnostic analysis demonstrates that both the changes in atmospheric circulation (dynamic component) and the moisture increase (thermodynamic component) play a key role in determining this rainfall dipole during RF increase, but the effect of the latter is reduced after RF stabilization. The responses of rainfall, sea surface temperature (SST) and atmospheric circulation are well coupled during the two periods: (a) the anomalous circulation affects the rainfall change by transporting abundant moisture to maintain the energy balance, with easterlies (northerlies) in RF increase (stabilization); and (b) in turn, heat released by the SST warming further induces the circulation change. Furthermore, during RF increase, the attribute of SST pattern is mainly led by ocean dynamics, especially heat transport due to ocean current changes, while after RF stabilization, it is mainly due to ocean heat transport leading by temperature changes.Hongyu HouXia QuGang HuangAmerican Geophysical Union (AGU)articleglobal warmingradiative forcing stabilizationsimulationatmosphere‐ocean couplingocean fast and slow responsesIndian OceanEnvironmental sciencesGE1-350EcologyQH540-549.5ENEarth's Future, Vol 9, Iss 10, Pp n/a-n/a (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	global warming radiative forcing stabilization simulation atmosphere‐ocean coupling ocean fast and slow responses Indian Ocean Environmental sciences GE1-350 Ecology QH540-549.5
spellingShingle	global warming radiative forcing stabilization simulation atmosphere‐ocean coupling ocean fast and slow responses Indian Ocean Environmental sciences GE1-350 Ecology QH540-549.5 Hongyu Hou Xia Qu Gang Huang Reversal Asymmetry of Rainfall Change Over the Indian Ocean During the Radiative Forcing Increase and Stabilization
description	Abstract The rainfall responses over the Indian Ocean (IO) are investigated based on the Representative Concentration Pathways 4.5 (RCP4.5) experiments of 13 models, in which the experiments are extended to the year 2300, from the Coupled Model Intercomparison Project Phase 5 (CMIP5). During the radiative forcing (RF) increase, the rainfall pattern displays northwest‐southeast dipole asymmetry. After RF stabilization, rainfall increases over the southern IO and decreases over the northern IO where is a wet region in climatology. Diagnostic analysis demonstrates that both the changes in atmospheric circulation (dynamic component) and the moisture increase (thermodynamic component) play a key role in determining this rainfall dipole during RF increase, but the effect of the latter is reduced after RF stabilization. The responses of rainfall, sea surface temperature (SST) and atmospheric circulation are well coupled during the two periods: (a) the anomalous circulation affects the rainfall change by transporting abundant moisture to maintain the energy balance, with easterlies (northerlies) in RF increase (stabilization); and (b) in turn, heat released by the SST warming further induces the circulation change. Furthermore, during RF increase, the attribute of SST pattern is mainly led by ocean dynamics, especially heat transport due to ocean current changes, while after RF stabilization, it is mainly due to ocean heat transport leading by temperature changes.
format	article
author	Hongyu Hou Xia Qu Gang Huang
author_facet	Hongyu Hou Xia Qu Gang Huang
author_sort	Hongyu Hou
title	Reversal Asymmetry of Rainfall Change Over the Indian Ocean During the Radiative Forcing Increase and Stabilization
title_short	Reversal Asymmetry of Rainfall Change Over the Indian Ocean During the Radiative Forcing Increase and Stabilization
title_full	Reversal Asymmetry of Rainfall Change Over the Indian Ocean During the Radiative Forcing Increase and Stabilization
title_fullStr	Reversal Asymmetry of Rainfall Change Over the Indian Ocean During the Radiative Forcing Increase and Stabilization
title_full_unstemmed	Reversal Asymmetry of Rainfall Change Over the Indian Ocean During the Radiative Forcing Increase and Stabilization
title_sort	reversal asymmetry of rainfall change over the indian ocean during the radiative forcing increase and stabilization
publisher	American Geophysical Union (AGU)
publishDate	2021
url	https://doaj.org/article/bc8b33441c4d42369cbd3c8f06eadecf
work_keys_str_mv	AT hongyuhou reversalasymmetryofrainfallchangeovertheindianoceanduringtheradiativeforcingincreaseandstabilization AT xiaqu reversalasymmetryofrainfallchangeovertheindianoceanduringtheradiativeforcingincreaseandstabilization AT ganghuang reversalasymmetryofrainfallchangeovertheindianoceanduringtheradiativeforcingincreaseandstabilization
_version_	1718416118200139776

Reversal Asymmetry of Rainfall Change Over the Indian Ocean During the Radiative Forcing Increase and Stabilization

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