A Comparison of Sea Surface Fluxes over Southern Indian Ocean Cruise Expedition Observation and NCEP Reanalysis |
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| Authors: | Avinash C Pandey Shailendra Rai Amitabh Mitra |
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| Institution: | 1. K. Banerjee Centre of Atmospheric and Ocean Studies , University of Allahabad , Allahabad , India;2. M. N. Centre of Space Studies , University of Allahabad , Allahabad , India;3. Department of Atmospheric and Ocean Sciences , University of Allahabad , Allahabad , India;4. Directorate of Census Operations Chandigarh , Chandigarh , India |
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| Abstract: | Surface layer atmospheric and ocean observations have been collected along the cruise track from a special scientific expedition to Antarctica. Bulk estimates of surface momentum flux, sensible heat flux and latent heat flux have been computed applying bulk algorithms from the data collected along cruise track during the time period January 27 to March 31, 2006, and compared the results with National Centre for Environmental Prediction (NCEP) reanalysis. Underestimation of surface momentum flux in roaring forties (40°S–50°S) area of Indian Ocean is seen from NCEP reanalysis. Systemic differences in sensible and latent heat fluxes between observed and NCEP reanalysis have been found. Along the cruise track, the average sensible (latent) heat flux was 9.45 Wm?2 (67.46 Wm?2) and 3.75 Wm?2 (64.45 Wm?2) from the direct measurement and NCEP reanalysis, respectively. The NCEP reanalysis is being widely used in numerical modeling studies, and the discrepancies shown in the NCEP reanalysis in present study will be of immense use to the modeling community of the Indian Ocean in general and Southern Indian Ocean in particular. |
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| Keywords: | Cruise surface layer observation Southern Indian Ocean surface layer flux |
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