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CO2 air–sea disequilibrium and preformed alkalinity in the Pacific and Indian oceans calculated from subsurface layer data


Pardo, PC and Vazquez-Rodriguez, M and Perez, FF and Rios, AF, CO2 air-sea disequilibrium and preformed alkalinity in the Pacific and Indian oceans calculated from subsurface layer data, Journal of Marine Systems, 84, (3-4) pp. 67-77. ISSN 0924-7963 (2011) [Refereed Article]

DOI: doi:10.1016/j.jmarsys.2010.08.006


This work estimates new regionalized empirical parameterizations for preformed alkalinity (ATo) and the CO2 air–sea disequilibrium (∆Cdis). Both are key terms for the computation of anthropogenic CO2 in the back-calculation methods. Data from the subsurface layer (75–180 m depth range) covering an area from North to South and from 19°E to 67.5°W (Pacific and Indian oceans) were taken from GLODAP (The Global Ocean Data Analysis Project) database. The subsurface layer is proved as a reliable reference for representing the main characteristics of the different water masses of the oceans. Besides, handing data from the two ocean basins altogether makes the new parameterizations of ATo and ∆Cdis to be more globally consistent. Nevertheless, each ocean basin, at least in some regions, has different oceanographic characteristics based on its proper dynamical processes and water masses formation. In order to maintain each ocean basin ‘identity’ the whole domain was divided in six different regions (two of them sharing waters from Pacific and Indian oceans) and parameterizations in each region for both terms were obtained. Previously, data were transformed into a grid of 4°lat. × 5°lon. and the results obtained from the parameterizations were visualized and compare with pCO2 climatologies. From the comparisons with previous ∆Cdis estimations good results are obtained showing the reliability and robustness of the new regionalized empiric parameterizations.

Item Details

Item Type:Refereed Article
Keywords:alkalinity, parameterization, air-water exchanges, carbon cycle, carbon sinks, Indian Ocean, Pacific Ocean, water masses
Research Division:Earth Sciences
Research Group:Physical geography and environmental geoscience
Research Field:Geomorphology and earth surface processes
Objective Division:Environmental Management
Objective Group:Marine systems and management
Objective Field:Measurement and assessment of marine water quality and condition
UTAS Author:Pardo, PC (Dr Paula Conde Pardo)
ID Code:103045
Year Published:2011
Web of Science® Times Cited:9
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2015-09-16
Last Modified:2017-10-30

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