satellite/9km/anomalies/GMIS_S_ANO_K490_MM_YYYY
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 - SeaWiFS Monthly anomalies sea surface diffuse attenuation coefficient at 490nm (9km) in %
2013-08-22
creation
2013-06-11T11:15:00
revision
2013-08-29
publication
satellite/9km/anomalies/GMIS_S_ANO_K490_MM_YYYY
https://jeodpp.jrc.ec.europa.eu/ftp/public/JRC-OpenData/GMIS
Water Transparency (Diffuse attenuation coefficient at 490nm, Kd490 in m^-1 at 9km resolution): The diffuse attenuation coefficient Kd490 measures the light penetration in the water column at the blue-green wavelengths (ca. 490 nm). It represents a good indicator of water transparency resulting from the combined action of absorption and backscattering by the water constituents, and the structure of the surrounding light field.
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 diffuse attenuation coefficient anomalies
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
1997-09-01
2010-12-31
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/anomalies/
GMIS - Download access (GMIS_S_ANO_K490)
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 anomalies sea surface diffuse attenuation coefficient at 490nm in m^-1 (log10 scalling) derived from the SeaWiFS sensor.
Processing information: Kd(490) data is processed using SeaDAS 6.4 software and the standard algorithm for Kd(490) (Werdell 2005).
Temporal characteristics: This dataset consists of standard Monthly anomalies sea surface Kd(490) maps at 9km resolution (L3 product).
Description of observation methods/instruments: The remote sensing of 'Ocean Colour' 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. The electromagnetic signal collected by the sensor on-board the satellite is largely determined by photons that have never reached the water surface, but have been backscattered within the atmosphere through multiple interactions between gas molecules and aerosols. After removing the atmospheric contribution, the water leaving radiance recorded at a given time by the satellite reflects the optical properties of the water which, in turn, mirrors a specific structure and biogeochemical composition of the marine waters. The satellite-derived reflectance at the air-sea interface is related to apparent optical properties of the water constituents including Kd(490).
Quality/accuracy/calibration information: The algorithm is an empirical band-ratio formula, with retrieval standard error and r^2 (for log-transformed data) of 0.28 and 0.89, respectively, as calculated over the development in situ data set (Werdell 2005). References: Werdell, P.J. (2005). Ocean color K490 algorithm evaluation. http://oceancolor.gsfc.nasa.gov/REPROCESSING/SeaWiFS/R5.1/k490_update.html
Other contextual information: The product is stored in NetCDF data and available for download.