satellite/9km/climatology/GMIS_A_CHLA_MM eng File Identifier of the parent series series Global Marine Information System, Directorate D - Sustainable Resources, Joint Research Centre JRC-EMIS@ec.europa.eu pointOfContact 2013-10-16 ISO19115 2003/Cor.1:2006 http://www.opengis.net/def/crs/EPSG/0/4936 GMIS - MODIS-AQUA Monthly climatology sea surface Chlorophyll-a concentration (9km) in mg.m^-3 2013-08-22 creation 2013-06-11T11:15:00 revision 2013-08-29 publication satellite/9km/climatology/GMIS_A_CHLA_MM https://jeodpp.jrc.ec.europa.eu/ftp/public/JRC-OpenData/GMIS Monthly climatology sea surface Chlorophyll-a concentration (in mg.m^-3 (log10) at 9km resolution) derived from the MODIS-AQUA sensor (Satellite remote sensing Ocean color data): Chlorophyll is a photosynthetic pigment commonly present in all phytoplankton species. It is used as a proxy for phytoplankton biomass. Chlorophyll concentration is a standard product from satellite-based optical sensors, usually retrieved from empirical algorithms using reflectance ratios at two or more wavebands. Global Marine Information System, Directorate D - Sustainable Resources, Joint Research Centre JRC-EMIS@ec.europa.eu pointOfContact Melin, Frederic European Commission, Joint Research Centre (JRC) frederic.melin@ec.europa.eu author sea surface Chlorophyll-a concentration climatology ocean color satellite observations marine environment coastal environment sea water protection marine monitoring GIS digital format climate change Environmental monitoring facilities Oceanographic geographical features Protected sites GEMET - INSPIRE themes, version 1.0 2008-06-01 publication environmental data GEMET - Concepts, version 2.4 2010-01-13 publication HYDROSPHERE (freshwater, marine water, waters) GEMET - Groups, version 2.4 2010-01-13 publication NATURAL ENVIRONMENT, ANTHROPIC ENVIRONMENT GEMET - Supergroups, version 2.4 2010-01-13 publication water GEMET - Themes, version 2.4 2010-01-13 publication OCEANS GEOSS - Earth Observation Vocabulary, version 1.0 2011-05-01 publication no conditions apply otherRestrictions no limitations 9 eng oceans environment -180.0 180.0 -90.0 90.0 2002-07-01 2017-12-31 https://jeodpp.jrc.ec.europa.eu/ftp/public/JRC-OpenData/GMIS/ Global Marine Information System WWW:LINK The Global Marine Information System (GMIS) provides information on marine ecosystems and coastal state, using biological and physical variables generated by satellite remote sensing. GMIS allows visualisation and download of Remote Sensing Ocean color data and derived products hosted at the Directorate D - Sustainable Resources. information https://jeodpp.jrc.ec.europa.eu/ftp/public/JRC-OpenData/GMIS/satellite/9km/climatology/ GMIS - Download access (GMIS_A_CHLA) WWW:DOWNLOAD Direct NetCDF download download series COMMISSION REGULATION (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication See the referenced specification false General information: Monthly climatology sea surface Chlorophyll-a concentration in mg.m^-3 (log10 scalling) derived from the MODIS-AQUA sensor. Processing information: Chlorophyll-a data is processed using NASA SeaDAS 6.4 software and the standard OC3M algorithm for chla. Temporal characteristics: This product consists of standard Monthly climatology sea surface chlorophyll-a concentrations (L3 product) at 9km resolution (projection: Equidistant cylindrical Grid mapping: equirectangular). Description of observation methods/instruments: The remote sensing of 'Ocean Color' represents a measure of the spectral variations in the light leaving the water surface, subsequently interpreted in terms of concentrations of optically-significant constituents in the water. After removing the atmospheric contribution, the water leaving radiance recorded at a given time and wavelength by the satellite reflects the optical properties of the water which, in turn, mirrors a specific structure and biogeochemical composition of the marine waters. Accordingly, the satellite-derived reflectance at the air-sea interface can be related to the concentration of an optically-significant constituent (e.g. chlorophyll). The retrieval of chlorophyll from MODIS-AQUA for case 1 waters (optically dominated by phytoplankton and associated products) uses a 4th order polynomial algorithm (O'Reilly et al. 2000). Quality/accuracy/calibration information: The 'standard' algorithm proposed by space agencies to process data from their sensors has a nominal accuracy of ~35% in the retrieval of surface chlorophyll in case 1 waters. References: J. E. O'Reilly and co-authors, SeaWiFS Postlaunch Calibration and Validation Analyses, Part 3. NASA Tech. Memo. 2000-206892, Vol. 11, S.B. Hooker and E.R. Firestone, Eds., NASA Goddard Space Flight Center, Greenbelt, Maryland, 9-23. Other contextual information: The product is stored in NetCDF data and available for download.