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Impact of Weddell Sea deep convection on natural and anthropogenic carbon in a climate model

Author(s): Bernardello, Raffaele; Marinov, Irina; Palter, Jaime B; Galbraith, Eric D; Sarmiento, Jorge L

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Abstract: A climate model is used to investigate the influence of Weddell Sea open ocean deep convection on anthropogenic and natural carbon uptake for the period 1860–2100. In a three‐member ensemble climate change simulation, convection ceases on average by year 1981, weakening the net oceanic cumulative uptake of atmospheric CO2 by year 2100 (−4.3 Pg C) relative to an ocean that has continued convection. This net weakening results from a decrease in anthropogenic carbon uptake (−10.1 Pg C), partly offset by an increase in natural carbon storage (+5.8 Pg C). Despite representing only 4% of its area, the Weddell Sea is responsible for 22% of the Southern Ocean decrease in total climate‐driven carbon uptake and 52% of the decrease in the anthropogenic component of oceanic uptake. Although this is a model‐specific result, it illustrates the potential of deep convection to produce an intermodel spread in future projections of ocean carbon uptake.
Publication Date: 28-Oct-2014
Citation: Bernardello, Raffaele, Irina Marinov, Jaime B. Palter, Eric D. Galbraith, and Jorge L. Sarmiento. "Impact of Weddell Sea deep convection on natural and anthropogenic carbon in a climate model." Geophysical Research Letters 41, no. 20 (2014): 7262-7269. doi:10.1002/2014GL061313.
DOI: doi:10.1002/2014GL061313
ISSN: 0094-8276
EISSN: 1944-8007
Pages: 7262 - 7269
Type of Material: Journal Article
Journal/Proceeding Title: Geophysical Research Letters
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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