Sea Surface Salinity - Near Real Time - MIRAS SMOS

jebidiah.jeffery — Thu, 14 Oct 2021 15:35:02 +0000

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.

jebidiah.jeffery Thu, 10/14/2021 - 11:35

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.

Short Names

CoastWatch/OceanWatch binned-SMOS-L3

Temporal Start Date

May 1, 2010

Product Families

Sea Surface Salinity

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

Measurements

Sea Surface Salinity

Processing Levels

Level 3

Spatial Coverage

Global

Latency Groups

0 Hours <= 24 Hours (NRT)

Latency Details

24 hours

Spatial Resolution Groups

2km+

Spatial Resolution Details

0.25°

Platforms

SMOS

Instruments

MIRAS

Data Providers

NOAA

NESDIS

STAR

CoastWatch

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:

https://www.star.nesdis.noaa.gov/data/socd1/coastwatch/products/miras/nc/SM_D2018202_Map_SATSSS_data_1day.nc

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