North Indian Ocean warming and sea level rise in an OGCM |
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| Authors: | Bijoy Thompson C Gnanaseelan Anant Parekh P S Salvekar |
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| Institution: | (1) Indian Institute of Tropical Meteorology, Pashan, Pune, 411 008, India |
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| 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 × 1011 J/m2 per year for north Indian Ocean. North Indian Ocean sea level anomaly (thermosteric component) also shows a linear increasing
trend of 0.31 mm/year during 1958–2000. |
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| Keywords: | Ocean model MOM4p0 Indian Ocean ocean warming sea level anomaly oceanography modelling climate atmospheric sciences |
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