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  • Indian monsoon's relation with the decadal part of PDO in observations and NCAR CCSM4.

    Author(s) : Krishnamurthy, L.Krishnamurthy, V.

    Author Affiliation : Department of Atmospheric, Oceanic and Earth Sciences, George Mason University, Fairfax, VA 22030, USA.

    Author Email : Lakshmi.Krishnamurthy@noaa.gov

    Journal article : International Journal of Climatology 2017 Vol.37 No.4 pp.1824-1833 ref.30

    Abstract : This study has investigated the influence of the decadal component of the Pacific Decadal Oscillation (PDO) on the Indian monsoon in observations and coupled climateclimateSubject Category: Climate Related
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    model. A major part of the conventionally defined PDO is shown to be dominated by interannual variability. By extracting the pure decadal part of the North Pacific variability, this study has shown that the Indian monsoon rainfall exhibits different relations with the conventionally defined PDO and the pure decadal component of the PDO. This result may have implications for decadal predictionpredictionSubject Category: Techniques, Methodologies and Equipment
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    of the monsoon. The analysisanalysisSubject Category: Techniques, Methodologies and Equipment
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    suggests that the warm (cold) phase of pure decadal variability of PDO is associated with deficit (excess) rainfall over the west central part of IndiaindiaSubject Category: Geographic Entities
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    . In contrast, the conventional warm (cold) PDO index is associated with deficit (excess) rainfall over most of India. The warm phase of the pure decadal PDO opposes the moisturemoistureSubject Category: Miscellaneous
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    flow beyond 20°N over the Indian monsoon region via the meridional winds extending from the North Pacific and leads to reduced rainfall over west central India. The Community Climate System Model version 4 of the National Center for Atmospheric ResearchresearchSubject Category: Disciplines, Occupations and Industries
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    shows reasonable simulationsimulationSubject Category: Techniques, Methodologies and Equipment
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    of the decadal PDO mode in both the North Pacific sea surface temperaturetemperatureSubject Category: Properties
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    and the Indian monsoon rainfall and the relation between them. Further, the observed and simulated PDO-monsoon relation is substantiated through a regionally de-coupled experiment. The coupled model experiment also provides supporting evidence for the mechanism involving the intermediary role played by the tropical Pacific Oceanpacific oceanSubject Category: Geographic Entities
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    in the PDO-monsoon relation.

    ISSN : 0899-8418

    DOI : 10.1002/joc.4815

    Record Number : 20173218187

    Publisher : Wiley

    Location of publication : Chichester

    Country of publication : UK

    Language of text : English

    Indexing terms for this abstract:

    Descriptor(s) : analysisanalysisSubject Category: Techniques, Methodologies and Equipment
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    , atmosphereatmosphereSubject Category: Miscellaneous
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    , climateclimateSubject Category: Climate Related
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    , El Nino-Southern Oscillationel nino-southern oscillationSubject Category: Climate Related
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    , forecastingforecastingSubject Category: Techniques, Methodologies and Equipment
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    , marine areasmarine areasSubject Category: Topographic Features
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    , meteorologymeteorologySubject Category: Disciplines, Occupations and Industries
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    , modelsmodelsSubject Category: Techniques, Methodologies and Equipment
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    , moisturemoistureSubject Category: Miscellaneous
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    , monsoonsmonsoonsSubject Category: Climate Related
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    , ocean currentsocean currentsSubject Category: Climate Related
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    , predictionpredictionSubject Category: Techniques, Methodologies and Equipment
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    , rainrainSubject Category: Climate Related
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    , researchresearchSubject Category: Disciplines, Occupations and Industries
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    , seasonal variationseasonal variationSubject Category: Properties
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    , simulationsimulationSubject Category: Techniques, Methodologies and Equipment
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    , surfacessurfacesSubject Category: Miscellaneous
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    , temperaturetemperatureSubject Category: Properties
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    , temporal variationtemporal variationSubject Category: Properties
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    , tropicstropicsSubject Category: Climate Related
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    , wet seasonwet seasonSubject Category: Climate Related
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    Identifier(s) : El Nino, ENSO, rainfall, rainy season, seasonal changes, seasonal fluctuations, studies, surface temperature, tropical countries, tropical zones

    Geographical Location(s) : IndiaindiaSubject Category: Geographic Entities
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    , Pacific Oceanpacific oceanSubject Category: Geographic Entities
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    Broader term(s) : Commonwealth of Nationscommonwealth of nationsSubject Category: Institutions and Organisations
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    , Developing Countriesdeveloping countriesSubject Category: Miscellaneous
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    , South Asiasouth asiaSubject Category: Geographic Entities
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    , AsiaasiaSubject Category: Geographic Entities
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