Nimit Kumar

TL;DR: In this paper, the authors discuss sources and sinks, which are specific for the Indian Ocean (IO), as well as unique atmospheric, oceanographic and topographic features of the IO such as reversing wind directions due to the monsoon, fronts and upwelling regions that control plastic distribution.

TL;DR: In this paper, the performance of two coupled bio-physical models, having spatial resolutions, was evaluated for simulating the real oceanic features, and the resolution of the model emerged to be an important factor in simulating real ocean features.

Abstract: The state of the ocean simulated through a numerical model is extremely sensitive to the forcing and hence, the choice of appropriate forcing is essential, in particular wind-fields. We compared Regional Ocean Modeling System (ROMS) simulations when forced with two different wind-fields derived from satellite sensors (scatterometers), namely QuickSCAT and ASCAT, while keeping the remaining configurations the same. This study had been carried out during the operational overlapping period of these scatterometers (2007–2009). We observed that the simulations of upper ocean chlorophyll distribution and depth of sub-surface chlorophyll maximum were vastly diverging when the model was forced with different scatterometer forcings. In order to determine which of the forcings yielded coastal productivity closer to observations, we compared model-simulated upper ocean chlorophyll concentration with in situ observations along the eastern Arabian Sea. For all the sub-regions, the QuickSCAT wind-forced coastal...

TL;DR: In this article, the authors demonstrate the persistence of sea surface thermal fronts based on the frequency of Sea Surface Temperature gradient satellite data, at seasonal and non-seasonal cycles, at the northeast Arabian Sea between the 50 m bathymetry contour and continental self break.