• D Ram Rajak

      Articles written in Journal of Earth System Science

    • Ocean sea-ice modelling in the Southern Ocean around Indian Antarctic stations

      Anurag Kumar Suneet Dwivedi D Ram Rajak

      More Details Abstract Fulltext PDF

      An eddy-resolving coupled ocean sea-ice modelling is carried out in the Southern Ocean region (9–78E; 51–71S) using the MITgcm. The model domain incorporates the Indian Antarctic stations, Maitri (11.7E; 70.7S) and Bharati (76.1E; 69.4S). The realistic simulation of the surface variables, namely, sea surface temperature (SST), sea surface salinity (SSS), surface currents, sea ice concentration (SIC) and sea ice thickness (SIT) is presented for the period of 1997–2012. The horizontal resolution of the model varies between 6 and 10 km. The highest vertical resolution of 5 m is taken near the surface, which gradually increases with increasing depths. The seasonal variability of the SST, SSS, SIC and currents is compared with the available observations in the region of study. It is found that the SIC of the model domain is increasing at a rate of 0.09% per month (nearly 1% per year), whereas, the SIC near Maitri and Bharati regions is increasing at a rate of 0.14 and 0.03% per month, respectively. The variability of the drift of the sea-ice is also estimated over the period of simulation. It is also found that the sea ice volume of the region increases at the rate of 0.0004 km3 per month (nearly 0.005 km3 per year). Further, it is revealed that the accumulation of sea ice around Bharati station is more as compared to Maitri station.

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