gov.noaa.nmfs.inport:66147 eng UTF8 dataset Office for Coastal Management resourceProvider 2024-08-15T14:01:26 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) Light Attenuation Kd490 publication NOAA/NMFS/EDM 66147 https://www.fisheries.noaa.gov/inport/item/66147 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information mapDigital This dataset represents monthly and annual mean summaries for Kd490 for the time period from 2000/2001 to 2017/2018, depending on the month and data available (see processing steps). Kd (490) is the diffuse attenuation coefficient at 490 nm. The diffuse attenuation coefficient in water indicates how strongly light intensity at a specified wavelength is attenuated within the water column. This parameter has wide applicability in ocean optics, as it is directly related to the presence of scattering particles in the water column, either organic or inorganic, and thus is an indication of water clarity. The diffuse attenuation coefficient at 490 nm (Kd490) indicates the turbidity of the water column -- how visible light in the blue to green region of the spectrum penetrates within the water column. The value of Kd490 (m-1) represents the rate at which light at 490 nm is attenuated with depth. For example, a Kd490 of 0.1/meter means that light intensity will be reduced one natural log within 10 meters of water. Thus, for a Kd490 of 0.1, one attenuation length is 10 meters. Higher Kd490 value means smaller attenuation depth and lower clarity of ocean water. To support ocean planning activities pursuant to the Executive Order Regarding the Ocean Policy to Advance the Economic, Security, and Environmental Interests of the United States, the Energy Policy Act, the National Environmental Policy Act, the Rivers and Harbors Act, and the Coastal Zone Management Act. ORIGINATORS: NASA Goddard Space Flight Center, Ocean Ecology Laboratory, Ocean Biology Processing Group; Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS), Office for Coastal Management (OCM); Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS), National Centers for Coastal Ocean Science (NCCOS); completed NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact asNeeded CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA place Global Change Master Directory (GCMD) Location Keywords 20.8 coastal planning renewable energy water column water quality theme United States place DOC/NOAA/NOS/OCM > Office of Coastal Management, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian MarineCadastre project InPort otherRestrictions Cite As: Office for Coastal Management, [Date of Access]: Light Attenuation Kd490 [Data Date Range], https://www.fisheries.noaa.gov/inport/item/66147. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Use Constraints: For coastal and ocean planning otherRestrictions Distribution Liability: https://www.marinecadastre.gov/about/disclaimer.html unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 66147 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocm/dmp/pdf/66147.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference eng; US oceans planningCadastre Version 6.2 (Build 9200) ; Esri ArcGIS 10.5.1.7333 -179.999989 179.999996 -17.584128 74.710722 https://marinecadastre.gov/data/ WWW:LINK-1.0-http--link https://marinecadastre.gov/data/ Marine Cadastre Data Registry download https://marinecadastre.gov/downloads/data/mc/LightAttenuationKd490.zip WWW:LINK-1.0-http--link https://marinecadastre.gov/downloads/data/mc/LightAttenuationKd490.zip download dataset Accuracy The attributes in this dataset are believed to be accurate. Horizontal Positional Accuracy Maximum scale of intended use is 1:80,000. Completeness Report Spatial and attribute properties are believed to be complete, although attribute information has been simplified. Geometric thresholds from original data are preserved. No tests have been completed for exhaustiveness. Conceptual Consistency These data are believed to be logically consistent. Geometry is topologically clean. (1) Downloaded the Level-3 Standard Mapped Image (SMI) for Kd490 data from MODIS for each monthly climatology (summary) and the entire mission composite at 4km resolution.* Additionally all Level-3 SMIs that were used to create the monthly climatology and entire mission composite were downloaded for descriptive statistic calculations. (2) R was used to create Geotiffs of each dataset (GCS WGS 1984). (3) Geotiffs converted to point features – X and Y coordinate field calculated - for the point dataset conversion (not relevant to raster dataset). (4) Point features were clipped by U.S. Economic Exclusion Zone and State waters. (5) All point features were combined into a single feature class. (6) Single point feature class and raster projected into WGS 1984 World Mercator. Temporal resolution for each monthly and annual mean: Kd 490 (m-1) January monthly mean 2001-2018 Kd 490 (m-1) February monthly mean 2000-2018 Kd 490 (m-1) March monthly mean 2000-2018 Kd 490 (m-1) April monthly mean 2000-2018 Kd 490 (m-1) May monthly mean 2000-2018 Kd 490 (m-1) June monthly mean 2000-2017 Kd 490 (m-1) July monthly mean 2000-2017 Kd 490 (m-1) August monthly mean 2000-2017 Kd 490 (m-1) September monthly mean 2000-2017 Kd 490 (m-1) October monthly mean 2000-2017 Kd 490 (m-1) November monthly mean 2000-2017 Kd 490 (m-1) December monthly mean 2000-2017 Kd 490 (m-1) Cumulative mean of entire mission (Annual means 2000-2017 with monthly means from Jan. to May 2018) 2018-08-01T00:00:00 Source Contribution: Monthly and Annual Summaries for Kd (490) Monthly and Annual Summaries for Kd (490) NASA Goddard Space Flight Center, Ocean Ecology Laboratory, Ocean Biology Processing Group https://oceancolor.gsfc.nasa.gov/atbd/kd_490/ WWW:LINK-1.0-http--link Source Online Linkage URL where the source data were originally accessed. information 2018-08-01