The NOAA National Center for Environmental Prediction (NCEP) optimum interpolation (OI) sea surface temperature (SST) analysis is produced weekly and monthly on a one-degree grid. The analysis uses in situ and satellite SSTs plus SSTs simulated by sea ice cover. Before the analysis is computed, the satellite data is adjusted for biases using the method of Reynolds (1988) and Reynolds and Marsico (1993). A description of the OI analysis can be found in Reynolds and Smith (1994). The bias correction improves the large scale accuracy of the OI.
In November 2001, the OI fields were recomputed for late 1981 onward. The new version will be referred to as OI Version 2, and the most significant change is the improved simulation of SST from sea ice data following a technique developed at the UK Met Office. This change has reduced biases in the OI SST at higher latitudes. Also, the update and extension of COADS has provided us with improved ship data coverage through 1997, reducing the residual satellite biases in otherwise data sparse regions. For more details, see Reynolds, et al. (2002).
1981-10-29 00:00 +0000 to 2023-02-01 00:00 +0000
Period details by dataset productPeriod details by dataset product1981-11-01 00:00 +0000 to 2023-01-31 00:00 +0000 (Version 2 Monthly OI SST GRIB Data)1981-12-01 00:00 +0000 to 2019-03-01 00:00 +0000 (Version 2 Monthly OI SST NetCDF Data)1981-11-01 00:00 +0000 to 2023-02-01 00:00 +0000 (Version 2 Weekly OI SST GRIB Data)1981-10-29 00:00 +0000 to 2023-01-29 00:00 +0000 (Version 2 Weekly OI SST NetCDF Data)
Longitude Range: Westernmost=180W Easternmost=180E
Latitude Range: Southernmost=90S Northernmost=90N
Detailed coverage informationDetailed coverage information1° x 1° from 0.5E to 0.5W and 89.5N to 89.5S (360 x 180 Longitude/Latitude)1° x 1° from 0.5E to 359.5E and 89.5N to 89.5S (360 x 180 Longitude/Latitude)2° x 2° from 0E to 358E and 88S to 88N (180 x 89 Longitude/Latitude)
National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce
National Centers for Environmental Prediction, National Weather Service, NOAA, U.S. Department of Commerce
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