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Short-term changes in the northwest african upwelling system induced by saharan dust deposition events
Title: Short-term changes in the northwest african upwelling system induced by saharan dust deposition events
Authors: González Ramos, Antonio JuanCuevas Agulló, Emilio ORCID RESEARCHERID SCOPUSID Autor AEMETPérez García-Pando, CarlosBaldasano, José MaríaCoca, JosepRedondo, ÁlexAlonso Pérez, SilviaBustos Seguela, Juan José deAutor AEMETNickovic, Slodoban
Keywords: Saharan dust; Dust deposition; Atmosphere circulation; Weather warming
Issue Date: 2009
Publisher: IOP Publishing
Citation: IOP Conference Series: Earth and Environmental Science. 2009, 7(1), p. 012019
Publisher version:
Abstract: During the last 7-year period (2000-2006) atmosphere circulation changes show strong influences on the dust storm deposition dynamics and, as a result, on the primary production dynamics of the northwest African Upwelling System. From 2000 to 2006, 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 was reduced from 6.2 to 5.3 m s-1 at the north of the Canary Islands. Mean annual satellite-derived AVHRR/NOAA SST recorded in the northwest African Upwelling became warmer in both locations, from 18.3ºC to 18.8ºC in Cape Ghir and from 19.5ºC to 20.3ºC north Canary Islands waters. CHL records from the SeaWiFS/OV-2 showed a different pattern trend. Mean annual CHL levels increased at Cape Ghir from 0.65 mg m-3 to 0.9 mg m-3 and significantly reduced from 0.59 mg m-3 to 0.31 mg m-3 at the north of the Canary Islands. Changes observed in the role of CHL during the last 7-years period could be associated to intensive dust deposition and exceptional weather warming observed in this area since 2000. However, this study focused on a 7-year period and conclusions on possible links between dust deposition and marine biochemistry activity cannot be generalized.
ISSN: 1755-1307
Appears in Collections:Artículos científicos 2005-2009

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