Surface productive layer (zeu in m at 2km resolution): The surface productive layer or euphotic zone represents the upper part of the water column that is illuminated by the sun down to the 1% light level. It is a surface layer where most of the primary production occurs.
- Frederic Melin
How to cite
Melin, Frederic (2013): EMIS - MERIS Monthly mean Surface productive layer (Euphotic Depth) (2km) in m. European Commission, Joint Research Centre (JRC) [Dataset] PID: http://data.europa.eu/89h/71dac67a-8a40-4f47-ac99-4ef0c1b8bc96
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General information: Monthly mean euphotic depth (in meter) as derived from the ocean colour MERIS (Medium Resolution Imaging Spectrometer) sensor (note that the product is called ÃƒÂ¢Ã¢â€šÂ¬Ã‹Å“surface productive layerÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢). Processing information: Euphotic depth data products are derived from the MERIS sensor on board the European Space Agency (ESA)ÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢s Envisat platform, and processed using the NASA software package SeaDAS 6.4. The product is calculated according to a Quasi-Analytical Algorithm (QAA; Lee et al. 2007) in which vertical attenuation coefficient of the sub-surface light is modeled by the inherent optical properties of the water. Temporal characteristics: The product is a monthly mean at 2 km resolution, covering the time period between May 2002 to September 2011. Description of observation methods/instruments: The satellite-derived euphotic depth product provides a measure of the ocean depth below which light available is insufficient to support significant photosynthetic activity. It is the depth at which the visible light (400 ÃƒÂ¢Ã¢â€šÂ¬Ã¢â‚¬Å“ 700 nm range) reduces to 1% of the light incident at the ocean surface. It is a measure of water quality, as well as a important variable to estimate water column primary production. Quality/accuracy/calibration information: Using field measurements in different part of the worldÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢s ocean, the average percentage error in the retrieval of the 1% light depth-level was calculated as ca. 14% (Lee et al.2007). References: Z Lee et al. 2007. Euphotic zone depth: Its derivation and implication to ocean-color remote sensing. J. Geophys. Res. 112, C03009, DOI: 10.1029/2006JC003802