Is desert dust making oligotrophic waters greener?

Details Is desert dust making oligotrophic waters greener? Is desert dust making oligotrophic waters greener?

May 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29j.107c&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 10, pp. 107-1, CiteID 1469, DOI 10.1029/2001GL014056

Physics

Optics

26

Oceanography: Physical: Ocean Optics, Oceanography: Biological And Chemical: Biogeochemical Cycles (1615), Global Change: Remote Sensing

Scientific paper

In situ optical measurements provide evidence that oligotrophic waters of the Mediterranean Sea have a greener color than would result from their phytoplankton content alone. This anomaly, detectable in low chlorophyll waters, remains unnoticed in the chlorophyll-rich waters of the nearby waters of the Moroccan upwelling zone. It is due to enhanced absorption in the blue and enhanced backscattering in the green parts of the visible spectrum likely resulting from the presence of submicron Saharan dust in suspension within the upper layer. This result implies that regional estimations of carbon fixation from ocean color images might be significantly overestimated, not only in the Mediterranean Sea, but also in other oligotrophic areas of the Northern hemisphere, subjected to desert dust deposition.

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