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Título : Ocean acidification along the 24.5°N section in the subtropical North Atlantic
Autor : Fernández-Guallart, E.; Fajar, Noelia ; Padín, X. A. ; Vázquez Rodríguez, Marcos ; Calvo, Eva María; Ríos, Aida F. ; Hernández Guerra, Alonso; Pelejero, Carles; Pérez, Fiz F.
Palabras clave : Seawater pH
Decadal variability
PH variability
Fecha de publicación : ene-2015
Editor: John Wiley & Sons
American Geophysical Union
Citación : Geophysical Research Letters 42(2): 450–458 (2015)
Resumen: Ocean acidification is directly related to increasing atmospheric CO2 levels due to human activities and the active role of the global ocean in absorbing part of this anthropogenic CO2. Here we present an assessment of the pH changes that have occurred along 24.5°N in the subtropical North Atlantic through comparison of pH observations conducted in 1992 and 2011. It reveals an overall decline in pH values in the first 1000 dbar of the water column. The deconvolution of the temporal pH differences into anthropogenic and nonanthropogenic components reveals that natural variability, mostly owed to a decrease in oxygen levels in particular regions of the section, explains the vertical distribution of the larger pH decreases (up to −0.05 pH units), which are found within the permanent thermocline. The detection of long-term trends in dissolved oxygen in the studied region gains importance for future pH projections, as these changes modulate the anthropogenically derived acidification. The anthropogenic forcing explains significant acidification deeper than 1000 dbar in the western basin, within the Deep Western Boundary Current.
Descripción : 9 páginas, 4 figuras.-- Proyecto Carbochange
Versión del editor: http://dx.doi.org/10.1002/2014GL062971
URI : http://hdl.handle.net/10261/110345
DOI: 10.1002/2014GL062971
ISSN: 0094-8276
E-ISSN: 1944-8007
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