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An evaluation of satellite and in situ based sea surface temperature datasets in the North Indian Ocean region

DRS at CSIR-National Institute of Oceanography

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Title An evaluation of satellite and in situ based sea surface temperature datasets in the North Indian Ocean region
 
Creator Sreejith, O.P.
Shenoi, S.S.C.
 
Subject surface temperature
satellites
in situ measurements
data collections
oceanographic data
comparative studies
annual variations
 
Description Satellite based daily fields of Pathfinder SST (PFSST) and blended-analysed fields like National Center for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) and Reynolds weekly SST data were compared with the in situ measurements obtained from several drifting buoys and a moored buoy in the north Indian Ocean. The mean difference (bias) and scatter (root mean square deviation (RMSD)) were higher than the ideally expected values of less than 0.01 degrees C and 0.5 degrees C for all three datasets. There was very little difference in the error statistics from one region to another. The error statistics differed significantly from year to year. The PFSST fields reported cooler SSTs approx. 0.5 degrees C, during August 1991 to April 1992, due to the increased input of aerosols in the atmosphere caused by the eruption of Mount Pinatubo. Being a high-resolution dataset, the PFSST is best able to mimic the sudden changes in the in situ SSTs that happen over a couple of days to a couple of weeks. Neither NCEP/NCAR data nor the Reynolds data were able to mimic the changes in SST that occur over a period of a few days. All three datasets are useful for the analysis of low frequency oscillations like annual and semi-annual cycles. PFSST and NCEP/NCAR SSTs are also useful for the analysis of higher frequency oscillations in the SST fields such as the 26-day period oscillations in the equatorial Indian Ocean
 
Date 2008-08-03T09:52:57Z
2008-08-03T09:52:57Z
2002
 
Type Journal Article
 
Identifier International Journal of Remote Sensing, Vol. 23(24); 5165-5175p.
http://drs.nio.org/drs/handle/2264/1339
 
Language en
 
Rights Taylor & Francis
 
Publisher Taylor & Francis