[ARCHIVE] North Atlantic Attenuation Coefficient at 490nm: monthly

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'''Short description:'''

The KD490 product identifies the turbidity of the water column, i.e., how visible light in the blue-green region of the spectrum penetrates within the water column. It is directly related to the presence of scattering particles in the water column. This product is derived from OLCI and remapped at nominal 300m spatial resolution using cylindrical equirectangular projection.

'''Description of observation methods/instruments:'''

Ocean colour technique exploits the emerging electromagnetic radiation from the sea surface in different wavelengths. The spectral variability of this signal defines the so called ocean colour which is affected by the presence of phytoplankton. By comparing reflectances at different wavelengths and calibrating the result against in-situ measurements, an estimate of in water absorption parameters can be derived.

'''Quality / Accuracy / Calibration information:'''

Detailed description of cal/val is given in the relevant QUID, associated validation reports and quality documentation.

'''DOI (product) :'''
https://doi.org/10.48670/moi-00078