Water transparency measurements in the deep Ionian Sea

E.G. Anassontzis (1) , A.E. Ball (2, 3) , A. Belias (3) , A. Fotiou (3) , G. Grammatikakis (4) , H. Kontogiannis (5) , P. Koske (6) , S. Koutsoukos (3) , V. Lykoussis (5) , E. Markopoulos (3) , A. Psallidas (3) , L.K. Resvanis (1, 3) , I. Siotis (7) , S. Stavrakakis (5) , G. Stavropoulos (3) , V.A. Zhukov (8, 9)

1 Physics Department
2 CERN - European Organization for Nuclear Research
3 NESTOR Institute for Deep Sea Research
4 Physics Department
5 HCMR - Hellenic Centre for Marine Research
6 CAU - Christian-Albrechts-Universität zu Kiel = Christian-Albrechts University of Kiel = Université Christian-Albrechts de Kiel
7 NCSR - National Center for Scientific Research "Demokritos"
8 RAS - Russian Academy of Sciences [Moscow]
9 MSOU - Moscow State Open University

A long optical base line spectrophotometer designed to measure light transmission in deep sea waters is described. The variable optical path length allows measurements without the need for absolute or external calibration. The spectrophotometer uses eight groups of uncollimated light sources emitting in the range 370 nm-530 nm and was deployed at various depths at two locations in the Ionian Sea that are candidate sites for a future underwater neutrino telescope. Light transmission spectra at the two locations are presented and compared.

Mots clés: neutrino; KM3NeT; NESTOR; water transparency

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Cosmologie et astrophysique extra-galactique [astro-ph.CO]

E.G. Anassontzis, A.E. Ball, A. Belias, A. Fotiou, G. Grammatikakis, et al.. Water transparency measurements in the deep Ionian Sea. Astroparticle Physics, 2010, 34 (4), pp.187. ⟨10.1016/j.astropartphys.2010.06.008⟩. ⟨hal-00679742⟩