ABOM-L4LRfnd-GLOB-GAMSSA_28km BLUElink Global Australian Multi-Sensor SST Analysis (GAMSSA), daily, 1/4 degree resolution ABOM BLUElink Global Australian Multi-Sensor SST Analysis (GAMSSA), daily, 1/4 degree resolution GAMSSA L4 0.25 degree 20080801T000000Z Australian Bureau of Meteorology, Melbourne, Australia Australian Bureau of Meteorology 1.0 Earth Science Oceans Ocean Temperature Sea Surface Temperature Foundation Sea Surface Temperature AVHRR Advanced Very High Resolution Radiometer AMSRE Advanced Microwave Scanning Radiometer AATSR Advanced Along-Track Scanning Radiometer ABOM Australian Bureau of Meteorology 20080801T000000Z -90.00 90.00 -180.00 180.00 Global Ocean Isolat-Isolong Grid Geolocation information included for each pixel 0.25 degree 0.25 degree daily None None ABOM ABOM Australian Bureau of Meteorology http://www.bom.gov.au ABOM-L4LRfnd-GLOB-GAMSSA_25km Technical Contact Leon Majewski ghrsst@bom.gov.au +61-3-9669-4746 +61-3-9669-4168

Australian Bureau of Meteorology, GPO Box 1289, Melbourne, Vic, 3001 AUSTRALIA

Principal Investigator Helen Beggs h.beggs@bom.gov.au +61-3-9669-4394 +61-3-9669-4660

Centre for Australian Weather and Climate Research, Australian Bureau of Meteorology, GPO Box 1289, Melbourne, Vic, 3001 AUSTRALIA

http://www.bom.gov.au/bmrc/pubs/researchreports/RR130.pdf

The GAMSSA v1.0 system blends NAVOCEANO's GAC 9.9 km x 4.4 km resolution AVHRR L2P SST1m data (NOAA-17, NOAA-18 and METOP-A), European Space Agency's 0.17 AATSR skin SST Meteo Product (EnviSat), Remote Sensing System's 25 km resolution AMSR-E L2P sub-skin SSTs (Aqua) and in situ bulk SSTs from the GTS. In order to produce a foundation SST estimate, the AATSR skin SST data stream is converted to foundation SST using the Donlon et al. (2002) skin to foundation temperature conversion algorithms. These empirically-derived algorithms apply a small correction for the cool-skin effect depending on surface wind speed, and filter out SST values suspected to be affected by diurnal warming by excluding cases which have experienced recent surface wind speeds of below 6 ms-1 during the day and less than 2 ms-1 during the night. Wind data used are the 0.75 horizontal resolution, 3-hourly, instantaneous 10 m winds derived from the BoM 60 level, Global Area Prediction System (GASP) NWP forecasts. The remaining satellite and in situ sub-skin and bulk SST data streams are similarly filtered to remove suspected diurnal warming events using calculated times for sunrise and sunset at the measurement location, GASP forecast winds and the same wind speed thresholds as applied to the AATSR data.

Data access (FTP) http://opendap.bom.gov.au:8080/thredds/catalog Access to the data through OpenDAP protocol Project Home Page http://www.ghrsst-pp.org GHRSST Project homepage Get Data http://ghrsst.jpl.nasa.gov Portal to the GHRSST Global Data Assembly Center and data access 1.0 20080801T000000Z 20080801T000000Z 20080801T000000Z L. Majewski: First created. 20080917 E. Armstrong: Revised