Description
Monthly climatology sea surface Chlorophyll-a concentration (in mg.m^-3 (log10) at 2km 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.
Contact
Contributors
-
- Frederic Melin
How to cite
Melin, Frederic (2013): EMIS - MODIS-AQUA Monthly climatology sea surface Chlorophyll-a concentration (2km) in mg.m^-3. European Commission, Joint Research Centre (JRC) [Dataset] PID: http://data.europa.eu/89h/88b1abea-99a6-49a2-b32b-46b6ad4d3275
Keywords
climate change coastal environment GIS digital format marine environment marine monitoring ocean color sea surface Chlorophyll-a concentration climatology sea water protection satellite observations
Data access
Direct NetCDF download
Spatial coverage
Type | Value |
---|---|
GML | <gml:Polygon xmlns:gml="http://www.opengis.net/gml"> <gml:outerBoundaryIs> <gml:LinearRing> <gml:coordinates>-30,70 42,70 42,10 -30,10 -30,70</gml:coordinates> </gml:LinearRing> </gml:outerBoundaryIs></gml:Polygon> |
GML | <gml:Polygon xmlns:gml="http://www.opengis.net/gml/3.2"> <gml:exterior> <gml:LinearRing> <gml:posList>-30 70 42 70 42 10 -30 10 -30 70</gml:posList> </gml:LinearRing> </gml:exterior></gml:Polygon> |
WKT | POLYGON ((-30 70, 42 70, 42 10, -30 10, -30 70)) |
Temporal coverage
From date | To date |
---|---|
2002-07-01 | 2015-12-31 |
Lineage information
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 2km 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.
Additional information
- Published by
- European Commission, Joint Research Centre
- Created date
- 2020-11-23
- Modified date
- 2020-11-23
- Issued date
- 2013-08-29
- Landing page
- http://emis.jrc.ec.europa.eu/
- Language(s)
- English
- Data theme(s)
- Environment
- Update frequency
- unknown
- Identifier
- http://data.europa.eu/89h/88b1abea-99a6-49a2-b32b-46b6ad4d3275
- Popularity
- 08 Dec 2023: 1 visits