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An update of anthropogenic CO2 storage rates in the western South Atlantic basin and the role of Antarctic Bottom Water
Citation
Rios, AF and Velo, A and Pardo, PC and Hoppema, M and Perez, FF, An update of anthropogenic CO2 storage rates in the western South Atlantic basin and the role of Antarctic Bottom Water, Journal of Marine Systems, 94 pp. 197-203. ISSN 0924-7963 (2012) [Refereed Article]
DOI: doi:10.1016/j.jmarsys.2011.11.023
Abstract
The western basin of the South Atlantic from 10°N to 55°S and from the coast to the Mid-Atlantic Ridge is a region with large uncertainties as to the storage of anthropogenic CO2 (Cant). Our analysis of data of the last three decades provides a Cant storage rate of 0.92 ± 0.13 mol m− 2 y− 1, i.e., 13%–35% higher than previous estimates in this area. The low but significant Cant concentrations ([Cant]) in the large volume of relatively well ventilated Antarctic Bottom Water (AABW) may well be the underlying cause of this higher storage rate. In fact, the significant contribution in terms of Cant of this ventilated AABW that enters the western South Atlantic Ocean was calculated to be 0.055 ± 0.02 Pg C y− 1 or 0.20 mol m− 2 y− 1. Instead of being based on the annual trend, the Cant specific inventory (in mol m− 2) evolution is more consistently computed as a function of the atmospheric xCO2 perturbation in ppm, (0.64 mol m− 2 ppm− 1). This methodology allows improved projections of Cant storage rates over long periods.
Item Details
Item Type: | Refereed Article |
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Keywords: | anthropogenic CO2 storage rate, anthropogenic CO2 inventory, decadal variability, Antarctic bottom water, South Atlantic, Southern Ocean |
Research Division: | Earth Sciences |
Research Group: | Climate change science |
Research Field: | Climate change processes |
Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
Objective Group: | Understanding climate change |
Objective Field: | Global effects of climate change (excl. Australia, New Zealand, Antarctica and the South Pacific) (excl. social impacts) |
UTAS Author: | Pardo, PC (Dr Paula Conde Pardo) |
ID Code: | 103042 |
Year Published: | 2012 |
Web of Science® Times Cited: | 28 |
Deposited By: | CRC-Antarctic Climate & Ecosystems |
Deposited On: | 2015-09-16 |
Last Modified: | 2017-10-30 |
Downloads: | 0 |
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