We offer here Version 2 of the OISST (previously: Reynolds SST) data set. It comprises two new high resolution sea surface temperature (SST) analysis products that have been developed using optimum interpolation (OI) --> OISST data set. One product uses Advanced Very High Resolution Radiometer (AVHRR) infrared satellite SST data (Pathfinder data: September 1981 through December 2005; operational AVHRR: January 2006 onwards). The other uses AVHRR and Advanced Microwave Scanning Radiometer (AMSR) on the NASA Earth Observing System satellite SST data (June 2002 onwards). Both products also use in situ data from ships and buoys and include a large-scale adjustment of satellite biases with respect to the in situ data. Hence this SST data set has to be regarded as a bulk SST data set.
ICDC offers the data set that is based on AVHRR data because this is the longest time series available (since 1981).
In addition ICDC (by M. Meyer(S. Kern) has computed the monthly mean SST for 1982-2018 and offers these data.
More information is given at
in the Technical Note by Reynolds, and further down under data quality.
See also the publications below (see references).
Last data update at ICDC: November 28, 2019.
On top of this ICDC (by M. Meyer/S. Kern) has computed anomalies of the monthly mean SST relative to two reference periods: 1982-2001 and 1992-2011 and also offers these anomalies for 1982-2017. We note that the daily data already contain anomalies. These are computed relative to a longer period (1971-2000) but over this period the reference data set is based on a less consistent data source with less consistent spatial resolution.
Maps of the SST trend for each month for the period 1982-2018. One example of these maps are displayed in the top right; the others can be clicked below:
JAN - FEB - MAR - APR - MAY - JUN - JUL - AUG - SEP - OCT - NOV - DEC
Graphs of the SST trend computed from 13-month moving average SST of 10° x 10° boxes. For each of these boxes shown in the sample trend figure at the top right the linear trend, its significance (p-value) and the mean SST are computed (by M. Meyer). Trend values without a p-value are not significant. Down below we show three sample graphs for 10°W to 20°W for, from left to right, 50°N-60°N, 40°N-50°N, 30°N-40°N. All the Graphs are available on request from stefan.kern(at)uni-hamburg.de or under /data/icdc_main/DATA/ocean/reynolds_sst/DATA/TRENDS/.