Five Year Mean Sea-surface Salinity in the Northern Gulf of Mexico for 2005 through 2009
Data Set (DS) | Office for Coastal Management (OCM)GUID: gov.noaa.nmfs.inport:48040 | Updated: October 17, 2023 | Published / External
Summary
Short Citation
Office for Coastal Management, 2024: Five Year Mean Sea-surface Salinity in the Northern Gulf of Mexico for 2005 through 2009, https://www.fisheries.noaa.gov/inport/item/48040.
Full Citation Examples
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).
Distribution Information
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ESRI REST Service
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ESRI REST Service
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ESRI REST Service
-
ESRI REST Service
None
None
Controlled Theme Keywords
ENVIRONMENTAL GOVERNANCE/MANAGEMENT, ENVIRONMENTAL IMPACTS, MARINE ECOSYSTEMS, oceans
Child Items
No Child Items for this record.
Contact Information
Point of Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Metadata Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Extents
-98.1° W,
-81.1° E,
30.9° N,
25.2° S
2005-01 - 2009-12
Item Identification
Title: | Five Year Mean Sea-surface Salinity in the Northern Gulf of Mexico for 2005 through 2009 |
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Short Name: | CMECS_Salinity_metadata |
Status: | Completed |
Publication Date: | 2012-05 |
Abstract: |
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). |
Purpose: |
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. |
Notes: |
10897 |
Supplemental Information: |
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). |
Keywords
Theme Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS
|
Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT
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Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL IMPACTS
|
ISO 19115 Topic Category |
oceans
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UNCONTROLLED | |
Coastal and Marine Ecological Classification Standard, FGDC-STD-018-2012 | Salinity |
None | Environmental Monitoring |
Spatial Keywords
Thesaurus | Keyword |
---|---|
Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALABAMA
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Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > FLORIDA
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Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > LOUISIANA
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Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MISSISSIPPI
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Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > TEXAS
|
Global Change Master Directory (GCMD) Location Keywords |
OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF MEXICO
|
UNCONTROLLED | |
None | Alabama |
None | Gulf of Mexico |
None | Louisiana |
None | Mississippi |
None | Texas |
None | Western Florida |
Stratum Keywords
Thesaurus | Keyword |
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UNCONTROLLED | |
Coastal and Marine Ecological Classification Standard, FGDC-STD-018-2012 | Epipelagic |
Coastal and Marine Ecological Classification Standard, FGDC-STD-018-2012 | Pelagic |
Coastal and Marine Ecological Classification Standard, FGDC-STD-018-2012 | Sea surface |
Coastal and Marine Ecological Classification Standard, FGDC-STD-018-2012 | Water column |
Physical Location
Organization: | Office for Coastal Management |
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City: | Charleston |
State/Province: | SC |
Data Set Information
Data Set Scope Code: | Data Set |
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Maintenance Frequency: | None Planned |
Data Presentation Form: | Map (digital) |
Distribution Liability: |
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. |
Data Set Credit: | Naval Research Laboratory, Stennis Space Center, National Oceanic and Atmospheric Administration, Office for Coastal Management - Gulf Region, NASA Earth Sciences Group, Stennis Space Center |
Support Roles
Data Steward
Date Effective From: | 2012-05 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Distributor
Date Effective From: | 2012-05 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Metadata Contact
Date Effective From: | 2012-05 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Point of Contact
Date Effective From: | 2012-05 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Extents
Currentness Reference: | Publication Date |
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Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | -98.1 | |
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E° Bound: | -81.1 | |
N° Bound: | 30.9 | |
S° Bound: | 25.2 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Range |
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Start: | 2005-01 |
End: | 2009-12 |
Spatial Information
Spatial Representation
Representations Used
Grid: | Yes |
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Grid Representation 1
Dimension Count: | 3 | ||||
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Cell Geometry: | Area | ||||
Transformation Parameters Available?: | No | ||||
Axis Dimension 1 |
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Axis Dimension 2 |
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Axis Dimension 3 |
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Access Information
Security Class: | Unclassified |
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Data Access Constraints: |
None |
Data Use Constraints: |
None |
Distribution Information
Distribution 1
Download URL: | http://service.ncddc.noaa.gov/arcgis/rest/services/DataAtlas/CMECS_Salinity_Fall/MapServer |
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Distributor: | |
File Type (Deprecated): | ArcGIS Map Service |
Distribution Format: | ESRI REST Service |
Distribution 2
Download URL: | http://service.ncddc.noaa.gov/arcgis/rest/services/DataAtlas/CMECS_Salinity_Spring/MapServer |
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Distributor: | |
File Type (Deprecated): | ArcGIS Rest MapService |
Distribution Format: | ESRI REST Service |
Distribution 3
Download URL: | http://service.ncddc.noaa.gov/arcgis/rest/services/DataAtlas/CMECS_Salinity_Summer/MapServer |
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Distributor: | |
File Type (Deprecated): | ArcGIS Rest MapService |
Distribution Format: | ESRI REST Service |
Distribution 4
Download URL: | http://service.ncddc.noaa.gov/arcgis/rest/services/DataAtlas/CMECS_Salinity_Winter/MapServer |
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Distributor: | |
File Type (Deprecated): | ArcGIS Rest MapService |
Distribution Format: | ESRI REST Service |
Distribution 5
Download URL: | http://www.ncddc.noaa.gov/website/DataAtlas/atlas.htm?plate=Salinity%20-%20CMECS |
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Distributor: | |
File Type (Deprecated): | atlas |
URLs
URL 1
URL: | https://gulfatlas.noaa.gov/ |
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URL Type: |
Online Resource
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URL 2
URL: | https://coast.noaa.gov/ |
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URL Type: |
Online Resource
|
Activity Log
Activity Log 1
Activity Date/Time: | 2016-05-23 |
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Description: |
Date that the source FGDC record was last modified. |
Activity Log 2
Activity Date/Time: | 2017-11-14 |
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Description: |
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. |
Data Quality
Accuracy: |
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. |
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Completeness Report: |
Values were assigned to categories in accordance with the Coastal and Marine Ecological Classification Standard. |
Conceptual Consistency: |
not applicable |
Lineage
Sources
Sea-surface Salinity
Contact Name: | Naval Research Laboratory, Stennis Space Center |
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Publish Date: | 2010-12-01 |
Extent Type: | Range |
Extent Start Date/Time: | 2005-01 |
Extent End Date/Time: | 2009-12 |
Source Contribution: |
Monthly means for 2005 through 2009 | Type of Source Media: external hard drive |
Process Steps
Process Step 1
Description: |
Sea-surface salinity values assigned in accordance with the Coastal and Marine Ecological Classification Standard. |
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Process Date/Time: | 2012-01-01 00:00:00 |
Catalog Details
Catalog Item ID: | 48040 |
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GUID: | gov.noaa.nmfs.inport:48040 |
Metadata Record Created By: | Anne Ball |
Metadata Record Created: | 2017-11-14 14:11+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2023-10-17 16:12+0000 |
Metadata Record Published: | 2017-11-16 |
Owner Org: | OCM |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2017-11-16 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2018-11-16 |