48040 CMECS_Salinity_metadata Data Set Published / External 37228 GulfRegion Project Completed 2012-05 These images were created by combining the mean sea-surface salinity values to produce seasonal representations for winter, spring, summer and fall. Winter includes the months of January, February and March; spring includes the months of April, May and June; summer includes the months of July, August and September; fall includes the months of October, November and December. Sea-surface salinity values were originally obtained from the Naval Research Laboratory at the Stennis Space Center (NRL/SSC). NRL/SSC processed MODIS-Aqua satellite imagery covering the Gulf of Mexico, for a 5-year time period from January 2005 through December 2009. The Gulf of Mexico was divided into three regions, western, central and eastern. For purposes of this image, the three regions were joined in ArcMAP 10. Sea-surface salinity was estimated from the ocean color imagery, based on an empirical relationship between colored dissolved organic matter (CDOM) absorption and salinity. Researchers at NRL have exploited this relationship to empirically estimate salinity from ocean color satellite imagery, since the absorption slope difference between 412 nm and 443 nm can be used as a proxy to estimate the CDOM absorption coefficient: Salinity = 36.208 - 46.488x + 27.683x2 - 8.338x3 + 0.965x4 In the above equation, x = difference between the absorption coefficients at 412 and 443 nm (a412-a443). The algorithm was developed using in situ data from a wide variety of locations and has been validated with independent ship and mooring data (Ladner et al. 2006; 2008). Currently the algorithm has an accuracy of about 1 PSU and is valid in coastal waters where salinity is strongly impacted by freshwater discharge (out to approximately mid-shelf). The algorithm is based on the difference in total absorption at 412 and 443 nm. NRL produced salinity images from the MODIS satellite ocean color data at both 250 m and 1 km spatial resolution in the Gulf of Mexico using this relationship. The salinity product derived from the ocean color imagery is still experimental and requires further validation. It is expected that different mixing regimes will affect the conservative nature of the CDOM/salinity proxy relationship, resulting in deviations from the above empirical relationship. These values were then reclassified into salinity ranges in accordance with the Coastal and Marine Ecological Classification Standard (CMECS). There are five CMECS categories presented: oligohaline (0 - < 5, shown in red), mesohaline (5 - < 18, shown in green), lower polyhaline (18 - < 25, shown in purple), upper polyhaline (25 - < 30, shown in yellow), and euhaline (> 30, shown in blue). This project was undertaken to assess the utility of satellite-derived products and modeled data for resource managers to characterize pelagic habitats in the absence of dense, time series in situ data. There were several steps involved in this process, including: identifying the most useful physicochemical parameters for characterizing the water column; assessing the fit of satellite-derived and modeled data as a proxy for in situ data; evaluating alternative, automated classification methodologies; querying resource managers for product improvement opportunities; and developing a practical example of a management application. Sea-surface salinity was one of the satellite-derived products assessed as a proxy for in situ data. 10897 The NOAA Office for Coastal Management - Gulf Region received this data from another federal agency. Questions regarding the original data collection and/or processing should be directed to that agency (see lineage source citation). Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL IMPACTS Theme ISO 19115 Topic Category oceans Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALABAMA Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > FLORIDA Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > LOUISIANA Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MISSISSIPPI Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > TEXAS Spatial Global Change Master Directory (GCMD) Location Keywords OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF AMERICA Theme Coastal and Marine Ecological Classification Standard, FGDC-STD-018-2012 Salinity Theme Environmental Monitoring Spatial Alabama Spatial Gulf of Mexico Spatial Louisiana Spatial Mississippi Spatial Texas Spatial Western Florida Stratum Coastal and Marine Ecological Classification Standard, FGDC-STD-018-2012 Epipelagic Stratum Coastal and Marine Ecological Classification Standard, FGDC-STD-018-2012 Pelagic Stratum Coastal and Marine Ecological Classification Standard, FGDC-STD-018-2012 Sea surface Stratum Coastal and Marine Ecological Classification Standard, FGDC-STD-018-2012 Water column Office for Coastal Management Charleston SC Data Set None Planned Map (digital) Any conclusions drawn from the analysis of this information are not the responsibility of the NOAA Office for Coastal Management or its partners.NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA, NESDIS, NODC and NCDDC cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system. Naval Research Laboratory, Stennis Space Center, National Oceanic and Atmospheric Administration, Office for Coastal Management - Gulf Region, NASA Earth Sciences Group, Stennis Space Center Data Steward 2012-05 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2012-05 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Metadata Contact 2012-05 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Point of Contact 2012-05 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Publication Date -98.1 -81.1 30.9 25.2 Range 2005-01 2009-12 Yes 3 Area No Row 823822 Column 823822 Vertical 1 Unclassified None None https://service.ncddc.noaa.gov/arcgis/rest/services/DataAtlas/CMECS_Salinity_Fall/MapServer ArcGIS Map Service ESRI REST Service https://service.ncddc.noaa.gov/arcgis/rest/services/DataAtlas/CMECS_Salinity_Spring/MapServer ArcGIS Rest MapService ESRI REST Service https://service.ncddc.noaa.gov/arcgis/rest/services/DataAtlas/CMECS_Salinity_Summer/MapServer ArcGIS Rest MapService ESRI REST Service https://service.ncddc.noaa.gov/arcgis/rest/services/DataAtlas/CMECS_Salinity_Winter/MapServer ArcGIS Rest MapService ESRI REST Service https://www.ncddc.noaa.gov/website/DataAtlas/atlas.htm?plate=Salinity%20-%20CMECS atlas https://coast.noaa.gov/ Online Resource https://gulfatlas.noaa.gov/ Online Resource 2016-05-23 Date that the source FGDC record was last modified. 2017-11-14 Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details. Unique values were generated for each image in ArcMAP 10. The unique values were then manually reclassified into appropriate Coastal and Marine Ecological Classification Standard categories. Values were assigned to categories in accordance with the Coastal and Marine Ecological Classification Standard. not applicable Sea-surface Salinity Naval Research Laboratory, Stennis Space Center 2010-12-01 Range 2005-01 2009-12 Monthly means for 2005 through 2009 | Type of Source Media: external hard drive 1 Sea-surface salinity values assigned in accordance with the Coastal and Marine Ecological Classification Standard. 2012-01-01T00:00:00 gov.noaa.nmfs.inport:48040 Anne Ball 2017-11-14T14:11:23 SysAdmin InPortAdmin 2025-05-15T19:15:57 2017-11-16 Office for Coastal Management OCM 1002 Public No No 2017-11-16 1 Year 2018-11-16