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NOAA NCEP Optimum Interpolation Sea Surface Temperature Analysis

| DOI: 10.5065/M4F2-M652

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).

Temporal Range:
1981-10-29 00:00 +0000 to 2023-02-01 00:00 +0000 (Entire dataset) Period details by dataset product
Sea Ice Concentration Sea Surface Temperature
Vertical Levels:
See the detailed metadata for level information.
Data Types:
Spatial Coverage:
Longitude Range: Westernmost=180W Easternmost=180E
Latitude Range: Southernmost=90S Northernmost=90N Detailed coverage information
Data Contributors:
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
Smith, T. M., R. W. Reynolds, Thomas C. Peterson, and Jay Lawrimore, 2007: Improvements to NOAA's Historical Merged Land-Ocean Surface Temperature Analysis (1880-2006) J. Climate, 21(10), 2283-2296 (DOI: 10.1175/2007JCLI2100.1).

Reynolds, R.W., N.A. Rayner, T.M. Smith, D.C. Stokes, and W. Wang, 2002: An Improved In Situ and Satellite SST Analysis for Climate J. Climate, 11, 3320-3323.

Total Volume:
1.73 GB (Entire dataset) Volume details by dataset product
Data Formats:
Related RDA Datasets:
Hadley Centre Global Sea Ice and Sea Surface Temperature (HadISST)
NOAA Optimum Interpolation 1/4 Degree Daily Sea Surface Temperature Analysis
NOAA NCEI Extended Reconstructed Sea Surface Temperature
More Details:
View a more detailed summary of the data, including specific date ranges and locations by parameter
Metadata Record:
Data License:
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