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    The Relationship between Convection and Sea Surface Temperature on Intraseasonal Timescales

    Source: Journal of Climate:;2000:;volume( 013 ):;issue: 012::page 2086
    Author:
    Woolnough, S. J.
    ,
    Slingo, J. M.
    ,
    Hoskins, B. J.
    DOI: 10.1175/1520-0442(2000)013<2086:TRBCAS>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The relationship between tropical convection, surface fluxes, and sea surface temperature (SST) on intraseasonal timescales has been examined as part of an investigation of the possibility that the intraseasonal oscillation is a coupled atmosphere?ocean phenomenon. The unique feature of this study is that 15 yr of data and the whole region from the Indian Ocean to the Pacific Ocean have been analyzed using lag-correlation analysis and compositing techniques. A coherent relationship between convection, surface fluxes, and SST has been found on intraseasonal timescales in the Indian Ocean, Maritime Continent, and west Pacific regions of the Tropics. Prior to the maximum in convection, there are positive shortwave and latent heat flux anomalies into the surface, followed by warm SST anomalies about 10 days before the convective maximum. Coincident with the convective maximum, there is a minimum in the shortwave flux, followed by a cooling due to increased evaporation associated with enhanced westerly wind stress, leading to negative SST anomalies about 10 days after the convection. The relationships are robust from year to year, including both phases of the El Niño?Southern Oscillation (ENSO) although the eastward extent of the region over which the relationship holds varies with the phase of ENSO, consistent with the variations in the eastward extent of the warm pool and westerly winds. The spatial scale of the anomalies is about 60° longitude, consistent with the scale of the intraseasonal oscillation. The spatial and temporal characteristics of the surface flux and SST perturbations are consistent with the surface flux variations forcing the ocean, and the magnitudes of the anomalies are consistent with mixed-layer depths appropriate to the Indian Ocean and west Pacific.
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      The Relationship between Convection and Sea Surface Temperature on Intraseasonal Timescales

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4194967
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    • Journal of Climate

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    contributor authorWoolnough, S. J.
    contributor authorSlingo, J. M.
    contributor authorHoskins, B. J.
    date accessioned2017-06-09T15:50:40Z
    date available2017-06-09T15:50:40Z
    date copyright2000/06/01
    date issued2000
    identifier issn0894-8755
    identifier otherams-5491.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4194967
    description abstractThe relationship between tropical convection, surface fluxes, and sea surface temperature (SST) on intraseasonal timescales has been examined as part of an investigation of the possibility that the intraseasonal oscillation is a coupled atmosphere?ocean phenomenon. The unique feature of this study is that 15 yr of data and the whole region from the Indian Ocean to the Pacific Ocean have been analyzed using lag-correlation analysis and compositing techniques. A coherent relationship between convection, surface fluxes, and SST has been found on intraseasonal timescales in the Indian Ocean, Maritime Continent, and west Pacific regions of the Tropics. Prior to the maximum in convection, there are positive shortwave and latent heat flux anomalies into the surface, followed by warm SST anomalies about 10 days before the convective maximum. Coincident with the convective maximum, there is a minimum in the shortwave flux, followed by a cooling due to increased evaporation associated with enhanced westerly wind stress, leading to negative SST anomalies about 10 days after the convection. The relationships are robust from year to year, including both phases of the El Niño?Southern Oscillation (ENSO) although the eastward extent of the region over which the relationship holds varies with the phase of ENSO, consistent with the variations in the eastward extent of the warm pool and westerly winds. The spatial scale of the anomalies is about 60° longitude, consistent with the scale of the intraseasonal oscillation. The spatial and temporal characteristics of the surface flux and SST perturbations are consistent with the surface flux variations forcing the ocean, and the magnitudes of the anomalies are consistent with mixed-layer depths appropriate to the Indian Ocean and west Pacific.
    publisherAmerican Meteorological Society
    titleThe Relationship between Convection and Sea Surface Temperature on Intraseasonal Timescales
    typeJournal Paper
    journal volume13
    journal issue12
    journal titleJournal of Climate
    identifier doi10.1175/1520-0442(2000)013<2086:TRBCAS>2.0.CO;2
    journal fristpage2086
    journal lastpage2104
    treeJournal of Climate:;2000:;volume( 013 ):;issue: 012
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian