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IJMS Vol.37(1) [March 2008] >


Title: In-situ data and NCEP reanalysis: A comparative study in the Southern Ocean and Antarctic Ocean
Authors: Das, I. M. L.
Mitra, Amitabh
Keywords: In-situ data, surface layer
NCEP reanalysis
Southern Ocean
Antarctic Ocean
Sea level pressure
Air temperature
Wind speed
Relative humidity
SST
Issue Date: Mar-2008
Publisher: CSIR
Abstract: A special expedition was launched by the National Center for Antarctic and Ocean Research (NCAOR), India on board R/V Akademik Boris Petrov during 25 January to 1 April 2006 passing the Southern Ocean and reaching the Larsemann Hills area of East Antarctica. The surface layer in-situ data generated from the cruise are compared with that obtained from the NCEP reanalysis during the same period along the track of the vessel. It is concluded that the NCEP reanalysis sea surface temperature and air temperature have some discrepancies as the vessel enters the sea ice zone near the Antarctic coast. The air pressure is well modeled but the relative humidity shows high variability throughout the period of the study. The wind speed is poorly correlated with that obtained from the NCEP due to the use of “Course over the ground” in place of ship “heading” while calculating the true wind.
Page(s): 86-92
ISSN: 0379-5136
Source:IJMS Vol.37(1) [March 2008]

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