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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jess/117/02/0169-0178

    • Keywords

       

      Ocean model; MOM4p0; Indian Ocean; ocean warming; sea level anomaly; oceanography; modelling; climate; atmospheric sciences.

    • Abstract

       

      The variability in the long-term temperature and sea level over the north Indian Ocean during the period 1958–2000 has been investigated using an Ocean General Circulation Model, Modular Ocean Model version 4. The model simulated fields are compared with the sea level observations from tide-gauges, Topex/Poseidon (T/P) satellite, in situ temperature profile observations from WHOI moored buoy and sea surface temperature (SST) observations from DS1, DS3 and DS4 moored buoys. It is seen that the long (6–8 years) warming episodes in the SST over the north Indian Ocean are followed by short episodes (2–3 years) of cooling. The model temperature and sea level anomaly over the north Indian Ocean show an increasing trend in the study period. The model thermocline heat content per unit area shows a linear increasing trend (from 1958–2000) at the rate of 0.0018 × 1011J/m2 per year for north Indian Ocean. North Indian Ocean sea level anomaly (thermosteric component) also shows a linear increasing trend of 0.31mm/year during 1958–2000.

    • Author Affiliations

       

      Bijoy Thompson1 C Gnanaseelan1 Anant Parekh1 P S Salvekar1

      1. Indian Institute of Tropical Meteorology, Pashan, Pune 411 008, India.
    • Dates

       
  • Journal of Earth System Science | News

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