Tool and Data
A free trial version is available for 45 days.
The following guides can be downloaded to help with the use of the program:
This SST analysis is a product of the Environmental Modeling Center Climate Modeling Branch of the National Centers for Environmental Prediction. The data are provided in NetCDF format by the Climate Diagnostics Center.
The optimum interpolation (OI) sea surface temperature (SST) analysis is produced weekly on a one-degree grid. The analysis uses in situ and satellite SST's plus SST's 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. Examples of the effect of recent corrections is given by Reynolds (1993). The bias correction does add a small amount of noise in time. Most of the noise can be eliminated by using a 1/4-1/2-1/4 binomial filter in time. We STRONGLY recommend that this filter be applied to the data fields before they are used. An improved method of correcting the biases is being developed.
For a complete description of the data as given by the providers and references for the papers cited in the description please see their information file: Provider information for the Reynolds SST datasets
Reynolds, R. W. and T. M. Smith, 1994: Improved global sea surface temperature analyses using optimum interpolation. J. Climate, 7, 929-948.