Perhaps the following paper could be of assistance? Lund-Hansen, L.C., 2004. Diffuse attenuation coefficients Kd(PAR) at the estuarine North Sea–Baltic Sea transition: time-series, partitioning, absorption, and scattering. Estuar. Coast. Shelf Sci. 61, 251–259.

Thank you very much for your help Derek! This is indeed the kind of study I had in mind although I am looking for a similar study performed in oceanic (class 1) waters.

Best,

Nicolas

Hi Nicolas,

you can use the model of morel (1988) and take a look to Morel and Maritorrena (2001) for updated parameterizations.

Besides, you can use standard models for IOPs in case 1 waters, see for instance this publication by André morel which give a good summary of all these relationships (MOrel, 2009), and then calculate Kd as a function of IOPs using MOrel and Loisel (1998) pour each wavelenghts to get Ed at each wavelenght, and integrate over the visible domain.

hope it helps

hubert

Morel, A., and S. Maritorena (2001). Bio-optical properties of oceanic waters: A reappraisal. Journal of Geophysical research, 106, 7763-7780

Morel, A. and J.F. Berthon (1989). Surface pigments, algal biomass profiles, and potential production of the euphotic layer: Relationships reinvestigated in view of remote-sensing applications, Limnology and Oceanography, 34, 1545-1562.

Morel, A. (1988). Optical modeling of the upper ocean in relation to its biogenous matter content (case 1 water), Journal of Geophysical Research, 93, 10,749-10,768.

Morel, A. and H. Loisel (1998). Apparent optical properties of oceanic water: Dependence on the molecular scattering contribution. Applied Optics, 37, 4765-4774.

Morel, A. (2009). Are the empirical relationships describing the bio-optical properties of case 1 waters consistent and internally compatible? Journal of Geophysical Research, 114, C01016, doi:10.1029/2008JC004803.

Hi Hubert,

thank you very much for your help! I'll go through these publications and see if that will do it.

Bien à vous et merci,

Nicolas

You can use MODIS Kd at 490 nm. To gain more information, you can refer to the following publication:

Conference Paper Investigation the Behavior of MODIS Ocean Color Products und...