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International Conference on Climate Change Global Warming

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Global analysis of OSCAT winds for sea-state prediction using third generation wave models

Author(s): Swain J, Umesh PA

Abstract

Indian Space Research Organization (ISRO) launched Oceansat-2 (OSCAT) on 23 September 2009 and the scatterometer onboard is a space borne sensor capable of providing ocean surface winds (both speed and direction) over the globe. Observations of ocean surface winds from such space borne sensors are the potential source of data covering the global oceans suitable for driving the state-of-the-art numerical wave models for sea-state prediction. In this study, the OSCAT winds have been processed and analysed for a selected period. In the absence of gridded analysed winds, i.e the blend of OSCAT and outputs of a global weather prediction model, the OSCAT measured winds are subjected to spatio-temporal interpolation and the 6-hourly gridded wind fields are generated over 1x1 degree resolution to drive the wave models WAM and WAVEWATCH-III.

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