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    Sea-level-rise trends off the Indian coasts during the last two decades

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    Curr_Sci_108_966.pdf (2.979Mb)
    Date
    2015
    Author
    Unnikrishnan, A.S.
    Nidheesh, A.G.
    Lengaigne, M.
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    Abstract
    The present communication discusses sea-level-rise trends in the north Indian Ocean, particularly off the Indian coasts, based on estimates derived from satellite altimeter and tide-gauge data. Altimeter data analysis over the 1993–2012 period reveals that the rate of sea-level rise is rather spatially homogeneous over most of the north Indian Ocean, reaching values close to global mean sea-level-rise trend (3.2 mm yr<sup>–1</sup>) estimated over the same period. The only notable exception lies in the northern and eastern coasts of the Bay of Bengal, which experience larger trends (5 mm yr<sup>–1</sup> and more). These recent trends derived from altimeter data are higher than those estimated from tide-gauge records over longer periods during the 20th century. This communication calls for an improved understanding of the mechanisms behind this accelerated sea-level-rise recorded over the past two decades, that could either be a direct response to global warming or a result from an aliasing by the natural variability.
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    http://drs.nio.org/drs/handle/2264/4747
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