The characteristics of particulate absorption, scattering and attenuation coefficients in the surface ocean ; ContributionoftheTara Oceans expedition

© A.Deniaud / Tara Expéditions

Tara Oceans

Emmanuel Boss (a,∗), Marc Picheral (b,e), Thomas Leeuw (a), Alison Chase (a), Eric Karsenti (c), Gabriel Gorsky (b,e), Lisa Taylor (a), Wayne Slade (d), Josephine Ras (b,e), Herve Claustre (b,e)

a. School of Marine Sciences, University of Maine, 458 Aubert Hall, Orono, ME 04401, USA

b. CNRS, UMR 7093, LOV, Observatoire oc.anologique, 06230 Villefranche/mer, France

c. EMBL Heidelberg, Meyerhofstra.e 1, 69117 Heidelberg, Germany

d. Sequoia Scientific, Inc., 2700 Richards Road, Suite 107, Bellevue, WA 98005, USA

e. UPMC Univ Paris 06, UMR 7093, LOV, Observatoire oc.anologique, 06230 Villefranche/mer, France

Captured’ecran 2015-01-13a17.41.24

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A dataset consisting of AC-S measurements of (hyper-) spectral particulate absorption, scattering and attenuation coefficients were obtained from measurements performed on the flow-through system of the R/V Tara during its 2.5-year long expedition. The AC-S instruments were robust, working continuously with
weekly maintenance for about 3 months at a time, and provided absorption (attenuation) data for 454 (375) days, or 90% (75%) of total possible days during the expedition. This dataset has been mapped to 1 km Å~ 1 km bins to avoid over emphasizing redundant data, and to match the spatial scale of typical ocean color satellite sensors. It consists of nearly 70,000 particulate absorption spectra and about 60,000 particulate scattering and attenuation spectra. These data are found to be consistent with chlorophyll extraction and with the published average shapes of particulate absorption and scattering spectra and bio-optical relationships. This dataset is richer than previous ones in the data from open-ocean (oligotrophic) environments making it more representative of global distributions and of utility for global algorithm development.