DATASET

EMIS - MODIS-AQUA Monthly mean photosynthetically available radiation (4km) in E.m^-2.d^-1

Collection: EMIS : Environmental Marine Information System 

Description

Photosynthetically Active Radiation (PAR in Einstein.m^-2.day^-1 at 4km resolution): PAR is defined as the quantum energy flux from the sun in the spectral range 400 to 700 nm, usable in the process of photosynthesis by phytoplankton, benthic algae and seagrass.

Contact

Email
jrc-emis (at) ec.europa.eu

Contributors

  • Frederic Melin

How to cite

Melin, Frederic (2013): EMIS - MODIS-AQUA Monthly mean photosynthetically available radiation (4km) in E.m^-2.d^-1. European Commission, Joint Research Centre (JRC) [Dataset] PID: http://data.europa.eu/89h/368b9e45-0d8e-48e2-acf1-2d100ad277b8

Keywords

climate change GIS digital format marine environment coastal environment Photosynthetically Active Radiation marine monitoring ocean color satellite observations sea water protection

Data access

EMIS - Download access (EMIS_A_PAR)
URL 
  • Direct NetCDF download

Spatial coverage

Type Value
GML
<gml:Envelope srsName="http://www.opengis.net/def/crs/OGC/1.3/CRS84"><gml:lowerCorner>-30.0 10.0</gml:lowerCorner><gml:upperCorner>42.0 70.0</gml:upperCorner></gml:Envelope>
GEO
POLYGON((-30 70,42 70,42 10,-30 10,-30 70))
GEO
{"type":"Polygon","crs":{"type":"name","properties":{"name":"urn:ogc:def:crs:OGC:1.3:CRS84"}},"coordinates":[[[-30.0,70.0],[42.0,70.0],[42.0,10.0],[-30.0,10.0],[-30.0,70.0]]]}

Temporal coverage

From date To date
2002-07-01 2017-10-31

Lineage information

General information: Monthly mean photosynthetically available radiation in E.m^-2.d^-1 (mol photons per square meter and per day) derived from the MODIS-AQUA sensor. Processing information: PAR data is reprocessed using the NASA SeaDAS 6.4 software (Frouin et al., 2003). Description of observation methods/instruments: The approach is described by Frouin et al. (2003).The content of the atmosphere in terms of aerosols and clouds is inferred from the spectrum of top-of-atmosphere radiance collected by the sensor in space. In turn, the downwelling irradiance reaching the surface of the ocean is computed using plane parallel theory. Eventually, by integration spectrally and over time, PAR is expressed as a daily value. Quality/Accuracy/Calibration information: The approach and results are described by Frouin et al. (2003). PAR represents the radiation in the spectral domain of relevance for photosynthesis (400-700 nm), and is used in model of primary production. References: Frouin, R., Franz, B.A., Werdell, P.J.: The SeaWiFS PAR product. In "Algorithm updates for the fourth SeaWiFS data reprocessing", S.B. Hooker and E.R. Firestone (Eds.) NASA/ NASA Technical Memorandum, 2003-206892, 22: 46-50.

Additional information

Published by
European Commission, Joint Research Centre
Created date
2021-04-23
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/368b9e45-0d8e-48e2-acf1-2d100ad277b8
Popularity