Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-03-25
Astropart.Phys. 27 (2007) 1-9
Astronomy and Astrophysics
Astrophysics
15 page, figures included, submitted to Astroparticle Physics
Scientific paper
10.1016/j.astropartphys.2006.08.
The NEMO (NEutrino Mediterranean Observatory) Collaboration has been carrying out since 1998 an evaluation programme of deep sea sites suitable for the construction of the future Mediterranean km3 Cerenkov neutrino telescope. We investigated the seawater optical and oceanographic properties of several deep sea marine areas close to the Italian Coast. Inherent optical properties (light absorption and attenuation coefficients) have been measured as a function of depth using an experimental apparatus equipped with standard oceanographic probes and the commercial transmissometer AC9 manufactured by WETLabs. This paper reports on the visible light absorption and attenuation coefficients measured in deep seawater of a marine region located in the Southern Ionian Sea, 60-100 km SE of Capo Passero (Sicily). Data show that blue light absorption coefficient is about 0.015 1/m (corresponding to an absorption length of 67 m) close to the one of optically pure water and it doe not show seasonal variation.
Capone Antonio
collaboration the NEMO
Riccobene Giorgio
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