NOAA Optimum Interpolation 1/4 Degree Daily Sea Surface Temperature Analysis (OISST), Version 2.1

The following documentation is taken from the documentation page describing the Daily Optimal Interpolation Sea Surface Temperature v2.1 dataset at the NCEI website:

Optimum Interpolation Sea Surface Temperature (OISST) v2.1

The NOAA 1/4° daily Optimum Interpolation Sea Surface Temperature (or daily OISST) is an analysis constructed by combining observations from different platforms (satellites, ships, buoys and Argo floats) on a regular global grid. A spatially complete SST map is produced by interpolating to fill in gaps. The methodology includes bias adjustment of satellite and ship observations (referenced to buoys) to compensate for platform differences and sensor biases. This proved critical during the Mt. Pinatubo eruption in 1991, when the widespread presence of volcanic aerosols resulted in infrared satellite temperatures that were much cooler than actual ocean temperatures (Reynolds 1993). The latest version is OISST v2.1, released on March 16, 2020.

Additional Data

Three other maps at the same 1/4° spatial resolution complement the daily OISST: