English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/7387
Compartir / Impacto:
Add this article to your Mendeley library MendeleyBASE
Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título : Reconstructing preformed properties and air-sea CO2 disequilibria for water masses in the Atlantic from sub-surface data: An application in anthropogenic carbon determination
Autor : Vázquez Rodríguez, Marcos
Palabras clave : Anthropogenic CO2
Water masses
Fecha de publicación : 1-oct-2008
Serie : Diploma de Estudios Avanzados
Resumen: The accurate estimation of the physical-chemical properties in the water masses at their time of formation is of foremost relevance in the context of anthropogenic CO2 (Cant) quantification. The tracer concentrations of the sub-surface layer (100-200 m) are thought to represent best water mass formation conditions compared to surface properties. The sub-surface data are proposed as a recommended alternative to be used in the absence of direct late wintertime surface observations for the pu+rpose of parameterizing preformed property concentrations. The scarcity of surface carbon system measurements is often the case in the high latitudes, where water mass formation typically occurs. Year-through, it is observed that the physical and biological processes affect the stability of the sub-surface layer by at least one order of magnitude less than the surface layer. In addition, it is found that during late wintertime the surface and sub-surface tracer concentrations are more alike. Alternatively, the water mass thermohaline variability of the 100-200 meter sub-surface layer encloses and represents all water masses outcropped in the Atlantic Ocean. Consequently, a revision of the classical back-calculation techniques for determining Cant is carried out. A new set of preformed total alkalinity (ATº) and air-sea CO2 disequilibrium (ΔCdis) parameterizations obtained from sub-surface data in modern Atlantic cruises is introduced. The change of ATº and ΔCdis over time is also examined and quantified. The temporal variability of ΔCdis has a non-negligible effect on Cant estimates, producing an average decrease of 4 μmol·kg-1. Compared with recent Cant inventories the results obtained with the revised back-calculation methodology show substantial differences in the Southern Ocean and Nordic Seas. These regions represent ~18% in terms of the total inventory. The estimated overall Atlantic Cant inventory referenced to 1994 is 55 ±13 Pg C.
URI : http://hdl.handle.net/10261/7387
Aparece en las colecciones: (IIM) Tesis
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
DEA-Marcos.pdf13,06 MBAdobe PDFVista previa
Mostrar el registro completo

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.