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    Response of the Arabian Sea to global warming and associated regional climate shift

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    Mar_Environ_Res_68_217a.pdf (556.6Kb)
    Date
    2009
    Author
    PrasannaKumar, S.
    Roshin, R.P.
    Narvekar, J.
    DineshKumar, P.K.
    Vivekanandan, E.
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    Abstract
    The response of the Arabian Sea to global warming is the disruption in the natural decadal cycle in the sea surface temperature (SST) after 1995, followed by a secular warming. The Arabian Sea is experiencing a regional climate-shift after 1995, which is accompanied by a five fold increase in the occurrence of ‘most intense cyclones’. Signatures of this climate-shift are also perceptible over the adjacent landmass of India as: (1) progressively warmer winters, and (2) decreased decadal monsoon rainfall. The warmer winters are associated with a 16-fold decrease in the decadal wheat production after 1995, while the decreased decadal rainfall was accompanied by a decline of vegetation cover and increased occurrence of heat spells. We propose that in addition to the oceanic thermal inertia, the upwelling-driven cooling provided a mechanism that offset the CO sub(2) - driven SST increase in the Arabian Sea until 1995.
    URI
    http://drs.nio.org/drs/handle/2264/3407
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