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CoastWatch/OceanWatch produces 0.25-degree longitude/latitude Level-3 gridded sea-surface salinity (SSS) daily and 3-day mean datasets by box averaging European Space Agency (ESA) Soil Moisture – Ocean Salinity (SMOS) mission’s Microwave Imaging Radiometer with Aperture Synthesis (MIRAS) satellite observations over the global ocean.
Data Access
| Data Tool Links | CoastWatch Near Real-Time Search (daily, global data) |
| HTTPS | https://www.star.nesdis.noaa.gov/data/socd1/coastwatch/products/miras/nc/
For direct download of daily or 3-day composites, use this link and complete the pattern for with daily or 3-day composite filename: https://www.star.nesdis.noaa.gov/data/socd1/coastwatch/products/miras/nc/SM_Dyyyyddd_Map_SATSSS_data_[1day|3days].nc where yyyy = Year and ddd=day of year, and choose 1day or 3days for composite (also remove brackets and the "|" character from the string). SMOS files are available from 1 June 2010 to present Example: |
| THREDDS | Top Level: https://www.star.nesdis.noaa.gov/thredds/socd/coastwatch/catalog_smos_smap.html SMOS Aggregated: https://www.star.nesdis.noaa.gov/thredds/socd/coastwatch/catalog_smos_aggregated.html SMOS Per File: https://www.star.nesdis.noaa.gov/thredds/catalog/SMOS/catalog.html |
Product Overview
CoastWatch/OceanWatch produces 0.25-degree longitude/latitude Level-3 gridded sea-surface salinity (SSS) daily and 3-day mean datasets by box averaging European Space Agency (ESA) Soil Moisture – Ocean Salinity (SMOS) mission’s Microwave Imaging Radiometer with Aperture Synthesis (MIRAS) satellite observations over the global ocean.
CoastWatch/OceanWatch Level-3 SSS products are generated directly from the ESA MIRAS SMOS Level-2 swath NetCDF files (currently V6.62; see release "https://earth.esa.int/documents/10174/1854503/SMOS-Level-2-Ocean-Salinity-v662-release-note"). There are two SSS variables in V6.62 L2 NetCDF files, SSS_corr (corrected for land-sea contamination) and SSS_uncorr. The CoastWatch L3 product ingests the SSS_corr with values between 27 - 40 PSS. These products improve the application of satellite SSS products in NOAA by minimizing the data latency to within 24 hours of Level-2 data availability.
Product Details
24 hours
0.25°
Documentation
- V6.62 Release Notes from ESA (link is external)contains links to other SMOS SSS product documents (such as ATDB, product specs, etc.)♦
- Barcelona Expert Center (2016). SMOS-BEC Ocean and Land Products Description. BEC-SMOS-0001-PD,Version 1.5. Technical report, BEC.
- Reagan, J., T. Boyer, J. Antonov, and M. Zweng (2014), Comparison analysis between Aquarius sea surface salinity and World Ocean Database in situ analyzed sea surface salinity, J. Geophys. Res. Oceans, 119, 8122–8140, doi:10.1002/2014JC009961(link is external)♦.
- SMOS-BEC Team 2016: SMOS-BEC Ocean and Land Products Description. BEC-SMOS-0001-PD.pdf , version 1.5
- SMOS Team, 2014: SMOS L2 OS Input/output data definition. SO-TN-ARG-GS-009. Issue 2, Rev 25, 5 September, 2014. ARGANS
