Saharan dust-induced chlorophyll blooms in the northwest African upwelling

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

doi:10.1117/12.804880

19 December 2008 Saharan dust-induced chlorophyll blooms in the northwest African upwelling

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

Author Affiliations +

Proceedings Volume 7150, Remote Sensing of Inland, Coastal, and Oceanic Waters; 715011 (2008) https://doi.org/10.1117/12.804880
Event: SPIE Asia-Pacific Remote Sensing, 2008, Noumea, New Caledonia

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.

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Antonio G. Ramos, Emilio Cuevas, Carlos Pérez, J. M. Baldasano, Josep Coca, Alex Redondo, Silvia Alonso-Pérez, Juan José Bustos, Sergio Rodriguez, Michel Petit, and Slobodan Nickovic "Saharan dust-induced chlorophyll blooms in the northwest African upwelling", Proc. SPIE 7150, Remote Sensing of Inland, Coastal, and Oceanic Waters, 715011 (19 December 2008); https://doi.org/10.1117/12.804880

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KEYWORDS

Magnesium

Water

Data modeling

Atmospheric modeling

Satellites

Meteorology

Atmospheric particles

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