Cuantificación de flujos de CO2 agua-atmósfera en estuarios mediante simulación en laboratorio
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Universidad de Cádiz
info
ISSN: 0185-3880, 2395-9053
Year of publication: 2005
Volume: 31
Issue: 1
Pages: 125-133
Type: Article
More publications in: Ciencias marinas
Abstract
Laboratory simulation of the processes that affect chemical species as they pass through estuaries is a useful tool for the study of these littoral systems. In this work, laboratory generation of the salinity gradients of several estuaries was performed using the steady state approach. We show how longitudinal salinity gradients can be generated in the laboratory, in order to characterize water-atmosphere CO2 flux variations along different salinity gradients. Many natural estuaries, exposed to anthropogenic influence, show oversaturation of CO2 relative to the atmosphere, with water pCO2 values between 500 and 9500 μatm. In all the experiments performed, pCO2 values higher than the mean atmospheric pCO2 were obtained. On the other hand, all the experimentally quantified water-atmosphere CO2 fluxes decrease exponentially with the increase in salinity. This same behaviour has been reported for several European estuaries by different authors.