IMOS - OceanCurrent - Gridded sea level anomaly - Delayed mode - DM02 (superseded)

Daily maps of gridded sea level anomaly (GSLA), gridded sea level (GSL) and surface geostrophic velocity (UCUR, VCUR) for the Australasian region. GSLA is mapped using optimal interpolation of detided, de-meaned, inverse-barometer-adjusted altimeter and coastal tide gauge estimates of sea level. Altimeter SSHA (sea surface height anomaly) was obtained from the RADS database and uses the most recent corrections (as of March 2020). Tide gauge data was obtained from the Bureau of Meteorology’s Australian Baseline Sea Level Monitoring Project. 
GSL is obtained by adding an estimate of the Mean Dynamic Height using the mean of an 18yr run of OFAM3 (Ocean Forecasting Australia Model version 3). UCUR and VCUR, are the total geostrophic surface velocities estimated from the GSL. UCUR_MEAN and VCUR_MEAN are the geostrophic surface velocities due to the Mean Dynamic Height. 

The altimeter data window for input to the Delayed Mode (DM) maps is symmetrical about the map date. The width of the window is dependent on the number of altimeters flying at the time and ranges from 30 days to 14 days. The altimeter data window for Near Real Time (NRT) maps is asymmetrical about the analysis date (-21 to 4 days). For both NRT and DM, altimeter data is weighted by the difference between the analysis date of the map and the time of each altimeter observation.

DM02 - Delayed Mode GSLA version 02
DM02 GSLA is a complete update of the previous version, DM01 using the latest corrections and applies a long-wave correction to the non-reference mission altimeter SSHA to revise all daily maps from 1993-2020.

Since April 2023, this DM02 product has been available via the AODN Portal, and supersedes the DM01 product formerly provided. The DM01 data details are provided via 
https://catalogue-imos.aodn.org.au/geonetwork/srv/api/records/c68b6e1b-98a6-415e-8563-f526e1db1bd5.

Since March 2026, this DM02 product has been no longer updated, and data is unavailable via the AODN Portal (the data has been archived). This product was superseded by the DM03 product, available via https://catalogue-imos.aodn.org.au/geonetwork/srv/api/records/663be14d-bb88-4e84-a34c-6c84a0196e2e. 

References: http://oceancurrent.imos.org.au/

Tags: Countries | Australia, Countries | Fiji, Countries | India, Countries | Indonesia, Countries | Malaysia, Countries | New Caledonia, Countries | New Zealand, Countries | Papua New Guinea, Countries | Philippines, Countries | Singapore, Countries | Sri Lanka, Countries | Timor-Leste, Countries | Vanuatu, Global / Oceans | Indian Ocean, Global / Oceans | Pacific Ocean, Global / Oceans | Southern Ocean, Marine Features (Australia) | Bass Strait, TAS/VIC, Marine Features (Australia) | Great Australian Bight, SA/WA, Marine Features | Strait of Malacca, Oceans | Ocean Circulation | Eddies, Oceans | Ocean Circulation | Gyres, Oceans | Ocean Circulation | Ocean Currents, Oceans | Ocean Circulation | Upwelling, Oceans | Sea Surface Height | Sea Surface Height, Offshore Islands (Australia) | Macquarie Island, Regional Seas | Arafura Sea, Regional Seas | Banda Sea, Regional Seas | Celebes Sea, Regional Seas | Coral Sea, Regional Seas | Gulf of Thailand, Regional Seas | Java Sea, Regional Seas | Philippine Sea, Regional Seas | Solomon Sea, Regional Seas | South China Sea, Regional Seas | Tasman Sea, Regional Seas | Timor Sea, Satellite Altimetry, States, Territories (Australia) | New South Wales, States, Territories (Australia) | Northern Territory, States, Territories (Australia) | Queensland, States, Territories (Australia) | South Australia, States, Territories (Australia) | Tasmania, States, Territories (Australia) | Victoria, States, Territories (Australia) | Western Australia
Organization: Australian Ocean Data Network