Overview

The pages linked below show the differences between last weeks sea surface temperature (SST) and multiyear means for the same time of year (climatology), and differences between several current SST analyses. Four climatologies have been used:

1. NCEP/NOAA (Reynolds) OIv2. This climatology was formed from the weekly SST analysis performed by Reynolds et al. The climatology for the current week was formed from a daily climatology, which in turn was computed using an average of all weeks between 1985 and 2001 containing that day of the year. The analysis resolution is 1 degree spatially. More detail can be found on the NOAA Optimum Interpolation home page
2. Pathfinder v5.0 (NOAA/NODC). The daily Pathfinder climatology product was used. This represents an average over the years 1985 to 2001. The resolution of the raw product is 4.5km, although the climatology was regridded (by area averaging) to 0.5 degrees when used here. More detail can be found here.
3. Levitus 98. The Levitus / WOA 1998 climatology was also used. This is a monthly climatology covering 1900-1997. The climatology was linearly interpolated from the nearest months to the centre of the analysis week or day before comparison.
4. ENACT. The ENACT project carried out a series of experiments to assimilate ocean data, resulting in several 3D analyses covering the latter part of the 20th century. A monthly climatology was formed using the Met Office Objective Analysis, using the years 1985 to 2001. The climatology was linearly interpolated from the nearest months to the centre of the analysis week or day before comparison. As well as a surface temperature, several depths are presented : 0-30m, 30-60m, 60-90m and 90-155m.

Weekly Analysis

The weekly analyses are carried out on Thursday evenings and cover the previous week from Thursday 00Z to Thursday 00Z.
Weekly global SST Monitoring
Weekly North Atlantic SST Monitoring

Daily Analysis

Rolling mean Analysis

(updated daily to cover last 7 days.)
Global SST Monitoring
Atlantic SST Monitoring

Monthly Analysis

Monthly global SST Monitoring
Monthly North Atlantic SST Monitoring

Observation monitoring and error analysis.

Daily observation and quality monitoring.