An International Group for High-Resolution Sea Surface Temperature (GHRSST) Level 4 sea surface temperature analysis, produced daily on an operational basis at the Australian Bureau of Meteorology using optimal interpolation (OI) on a global 0.25 degree grid. This Global Australian Multi-Sensor SST Analysis (GAMSSA) v1.0 system blends infra-red SST observations from the Advanced Very High Resolution Radiometer (AVHRR) on NOAA and METOP polar-orbiting satellites, microwave SST observations from the Advanced Microwave Scanning Radiometer-2 (AMSR-2) on GCOM-W, and in situ data from ships, and drifting and moored buoys from the Global Telecommunications System (GTS).
All SST observations are filtered for those values suspected to be affected by diurnal warming by excluding cases which have experienced recent surface wind speeds of below 6 m/s during the day and less than 2 m/s during the night, thereby resulting in daily foundation SST estimates that are largely free of diurnal warming effects.
Statement: The processing method is described in both Zhong, Aihong and Helen Beggs (2008) Analysis and Prediction Operations Bulletin No. 77 - Operational Implementation of Global Australian Multi-Sensor Sea Surface Temperature Analysis, Web Document, 2 October 2008. http://www.bom.gov.au/australia/charts/bulletins/apob77.pdf and Beggs H., A. Zhong, G. Warren, O. Alves, G. Brassington and T. Pugh (2011) RAMSSA - An Operational, High-Resolution, Multi-Sensor Sea Surface Temperature Analysis over the Australian Region, Australian Meteorological and Oceanographic Journal, 61, 1-22 (http://www.bom.gov.au/jshess/papers.php?year=2011). All files are supplied in the GHRSST Data Specification version 2.0 revision 5 format, documented at https://www.ghrsst.org/governance-documents/ghrsst-data-processing-specification-2-0-revision-5/.
Australia’s Integrated Marine Observing System (IMOS) is enabled by the National Collaborative Research Infrastructure Strategy (NCRIS). It is operated by a consortium of institutions as an unincorporated joint venture, with the University of Tasmania as Lead Agent.
Australian Bureau of Meteorology (BOM)
CSIRO Marine and Atmospheric Research (CMAR)