@article{fdi:010064779, title = {{V}ariability of solar radiation and {CDOM} in surface coastal waters of the northwestern {M}editerranean sea}, author = {{S}emp{\'e}r{\'e}, {R}ichard and {P}ara, {J}. and {T}edetti, {M}arc and {C}harriere, {B}. and {M}allet, {M}.}, editor = {}, language = {{ENG}}, abstract = {{A}tmospheric and in-water solar radiation, including {UVR}-{B}, {UVR}-{A} and {PAR}, as well as chromophoric dissolved organic matter absorption [a({CDOM})()] in surface waters were monthly measured from {N}ovember 2007 to {D}ecember 2008 at a coastal station in the {N}orthwestern {M}editerranean {S}ea ({B}ay of {M}arseilles, {F}rance). {O}ur results showed that the {UVR}-{B}/{UVR}-{A} ratio followed the same trend in the atmosphere and at 2m depth in the water ({P}<0.0001) with an increase (eight-fold higher) during summer. {T}he low diffuse attenuation coefficients for downward irradiance [{K}-d()] of {UVR}-{B}, {UVR}-{A} and {PAR} indicated that the waters were highly transparent throughout the year. {T}he relationships between a({CDOM})() and {K}-d() in this oligotrophic system suggested that {CDOM} contributed to {UVR} attenuation in the {UVA} domain, but also played a significant role in {PAR} attenuation. {M}ean {UV} doses received in the mixed layer depth were higher by a factor 1.4-33 relative to doses received at fixed depths (5 and 10m) in summer (stratified period), while the inverse pattern was found in winter (mixing period). {T}his shows the importance of taking into account the vertical mixing in the evaluation of {UVR} effects on marine organisms.}, keywords = {{MEDITERRANEE}}, booktitle = {}, journal = {{P}hotochemistry and {P}hotobiology}, volume = {91}, numero = {4}, pages = {851--861}, ISSN = {0031-8655}, year = {2015}, DOI = {10.1111/php.12434}, URL = {https://www.documentation.ird.fr/hor/fdi:010064779}, }