An estimation of heat flux and its variability in the Southern Indian Ocean (SIO) using Ocean General Circulation Model

• Main Authors: Anshu Prakash Mishra, S. Rai
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Antarctic; Indian; The Antarctic; Antarc*
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.563.2092; http://www.igu.in/11-4/6anshu.pdf

Evaluated annual mean and seasonal means net heat flux at the ocean surface for the period 1975-1998 from an ocean model results for Southern Indian Ocean (SIO) having spatial coverage 0.25°N-74.25°S & 15.75°E-120.75°E. It has been found that model annual mean and seasonal means net heat flux fields agree moderately with Southampton Oceanography Center (SOC) climatological heat fluxes and there are spatial inconsistencies in computation against a good agreement in-between model and SOC data sets in the region of interest. These discrepancies may be due to deficiency with model physics or sampling related bias in SOC data sets. Further, nature of variability of surface heat flux field in SIO was studied using Empirical Orthogonal Functions (EOF) techniques. Interannual variability represented in the first EOF of surface heat flux anomaly shows a strong trend in the Antarctic Circumpolar Current (ACC) region and significance variability around ten years.