Extended Reconstructed Sea Surface Temperature (ERSST)

The Extended Reconstructed Sea Surface Temperature (ERSST) dataset is a global monthly sea surface temperature analysis derived from the International Comprehensive Ocean–Atmosphere Dataset with missing data filled in by statistical methods. This monthly analysis begins in January 1854 continuing to the present and includes anomalies computed with respect to a 1971–2000 monthly climatology.

Extended Reconstructed Sea Surface Temperature (ERSST) v4

• The newest version of ERSST, version v4, is produced on a 2° × 2° grid with spatial completeness enhanced using statistical methods. Version 4, is based on optimally tuned parameters using the latest datasets and improved analysis methods.

Extended Reconstructed Sea Surface Temperature (ERSST) v3b

• The ERSST version 3b is optimally tuned to exclude under-sampled regions for global averages. In contrast to version 3, ERSST v3b does not include satellite data, which were found to cause a cold bias significant enough to change the rankings of months.