Decadal climate predictability in the southern Indian Ocean captured by SINTEX-F using a simple SST-nudging scheme

Abstract Decadal climate variability in the southern Indian Ocean has great influences on southern African climate through modulation of atmospheric circulation. Although many efforts have been made to understanding physical mechanisms, predictability of the decadal climate variability, in particula...

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Autores principales:	Yushi Morioka, Takeshi Doi, Swadhin K. Behera
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/193507b6fbab4a689d1993f29658a699
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spelling	oai:doaj.org-article:193507b6fbab4a689d1993f29658a6992021-12-02T15:08:52ZDecadal climate predictability in the southern Indian Ocean captured by SINTEX-F using a simple SST-nudging scheme10.1038/s41598-018-19349-32045-2322https://doaj.org/article/193507b6fbab4a689d1993f29658a6992018-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-19349-3https://doaj.org/toc/2045-2322Abstract Decadal climate variability in the southern Indian Ocean has great influences on southern African climate through modulation of atmospheric circulation. Although many efforts have been made to understanding physical mechanisms, predictability of the decadal climate variability, in particular, the internally generated variability independent from external atmospheric forcing, remains poorly understood. This study investigates predictability of the decadal climate variability in the southern Indian Ocean using a coupled general circulation model, called SINTEX-F. The ensemble members of the decadal reforecast experiments were initialized with a simple sea surface temperature (SST) nudging scheme. The observed positive and negative peaks during late 1990s and late 2000s are well reproduced in the reforecast experiments initiated from 1994 and 1999, respectively. The experiments initiated from 1994 successfully capture warm SST and high sea level pressure anomalies propagating from the South Atlantic to the southern Indian Ocean. Also, the other experiments initiated from 1999 skillfully predict phase change from a positive to negative peak. These results suggest that the SST-nudging initialization has the essence to capture the predictability of the internally generated decadal climate variability in the southern Indian Ocean.Yushi MoriokaTakeshi DoiSwadhin K. BeheraNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yushi Morioka Takeshi Doi Swadhin K. Behera Decadal climate predictability in the southern Indian Ocean captured by SINTEX-F using a simple SST-nudging scheme
description	Abstract Decadal climate variability in the southern Indian Ocean has great influences on southern African climate through modulation of atmospheric circulation. Although many efforts have been made to understanding physical mechanisms, predictability of the decadal climate variability, in particular, the internally generated variability independent from external atmospheric forcing, remains poorly understood. This study investigates predictability of the decadal climate variability in the southern Indian Ocean using a coupled general circulation model, called SINTEX-F. The ensemble members of the decadal reforecast experiments were initialized with a simple sea surface temperature (SST) nudging scheme. The observed positive and negative peaks during late 1990s and late 2000s are well reproduced in the reforecast experiments initiated from 1994 and 1999, respectively. The experiments initiated from 1994 successfully capture warm SST and high sea level pressure anomalies propagating from the South Atlantic to the southern Indian Ocean. Also, the other experiments initiated from 1999 skillfully predict phase change from a positive to negative peak. These results suggest that the SST-nudging initialization has the essence to capture the predictability of the internally generated decadal climate variability in the southern Indian Ocean.
format	article
author	Yushi Morioka Takeshi Doi Swadhin K. Behera
author_facet	Yushi Morioka Takeshi Doi Swadhin K. Behera
author_sort	Yushi Morioka
title	Decadal climate predictability in the southern Indian Ocean captured by SINTEX-F using a simple SST-nudging scheme
title_short	Decadal climate predictability in the southern Indian Ocean captured by SINTEX-F using a simple SST-nudging scheme
title_full	Decadal climate predictability in the southern Indian Ocean captured by SINTEX-F using a simple SST-nudging scheme
title_fullStr	Decadal climate predictability in the southern Indian Ocean captured by SINTEX-F using a simple SST-nudging scheme
title_full_unstemmed	Decadal climate predictability in the southern Indian Ocean captured by SINTEX-F using a simple SST-nudging scheme
title_sort	decadal climate predictability in the southern indian ocean captured by sintex-f using a simple sst-nudging scheme
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/193507b6fbab4a689d1993f29658a699
work_keys_str_mv	AT yushimorioka decadalclimatepredictabilityinthesouthernindianoceancapturedbysintexfusingasimplesstnudgingscheme AT takeshidoi decadalclimatepredictabilityinthesouthernindianoceancapturedbysintexfusingasimplesstnudgingscheme AT swadhinkbehera decadalclimatepredictabilityinthesouthernindianoceancapturedbysintexfusingasimplesstnudgingscheme
_version_	1718387985702977536

Decadal climate predictability in the southern Indian Ocean captured by SINTEX-F using a simple SST-nudging scheme

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