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Proceedings Paper

Saharan dust-induced chlorophyll blooms in the northwest African upwelling
Author(s): Antonio G. Ramos; Emilio Cuevas; Carlos Pérez; J. M. Baldasano; Josep Coca; Alex Redondo; Silvia Alonso-Pérez; Juan José Bustos; Sergio Rodriguez; Michel Petit; Slobodan Nickovic
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Paper Abstract

During the period 2000-2005, the atmospheric dynamic showed a significant influence on the dust inputs dynamic and, as a result, on the primary production of the northwest African Upwelling System since 2000 to 2005. In this period, the annual mean sea level pressure became higher, ranging from 1014 to 1015 mb. Mean annual zonal wind intensity became higher (from 1.1 to 1.8 m s-1), while the mean annual meridional wind reduced from 6.2 to 5.3 m s-1. Mean annual satellite-derived AVHRR/NOAA Sea Surface Temperature recorded in the northwest African Upwelling becomes warmer with 18.3°C to 18.8°C in Cape Ghir, and from 19.5°C to 20.3°C north Canary Islands waters. Chlorophyll data from SeaWiFS/OV-2 showed a different pattern trend. Mean annual CHL levels increased at eutrophic-like waters of Cape Ghir from 0.65 mg m-3 to 0.9 mg m-. However, data were significantly reduced from 0.59 mg m-3 to 0.31 mg m-3 in oligotrophic-like waters of the Canary Islands. Changes observed in the role of CHL during the last 6-years period could be associated to intensive dust deposition and the exceptional weather warming observed in this area since 2000. However, it is addressed to a single 7 years period and conclusions on possible links between dust deposition and marine biochemistry activity cannot be generalized.

Paper Details

Date Published: 19 December 2008
PDF: 13 pages
Proc. SPIE 7150, Remote Sensing of Inland, Coastal, and Oceanic Waters, 715011 (19 December 2008); doi: 10.1117/12.804880
Show Author Affiliations
Antonio G. Ramos, Univ. de Las Palmas de Gran Canaria (Spain)
Emilio Cuevas, Instituto Nacional de Meteorología (Spain)
Carlos Pérez, Barcelona Supercomputing Ctr. (Spain)
J. M. Baldasano, Barcelona Supercomputing Ctr. (Spain)
Josep Coca, Univ. de Las Palmas de Gran Canaria (Spain)
Alex Redondo, Univ. de Las Palmas de Gran Canaria (Spain)
Silvia Alonso-Pérez, Instituto Nacional de Meteorología (Spain)
Juan José Bustos, Instituto Nacional de Meteorología (Spain)
Sergio Rodriguez, Instituto Nacional de Meteorología (Spain)
Michel Petit, Institut de Recherche pour le Développement (France)
Slobodan Nickovic, World Meteorological Organization (Switzerland)

Published in SPIE Proceedings Vol. 7150:
Remote Sensing of Inland, Coastal, and Oceanic Waters
Robert J. Frouin; Serge Andrefouet; Hiroshi Kawamura; Mervyn J. Lynch; Delu Pan; Trevor Platt, Editor(s)

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