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Reemergence of Anthropogenic Carbon Into the Ocean's Mixed Layer Strongly Amplifies Transient Climate Sensitivity

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Title
Reemergence of Anthropogenic Carbon Into the Ocean's Mixed Layer Strongly Amplifies Transient Climate Sensitivity
Author(s)
Keith B.Rodgers; Schlunegger, S.; Slater, R.D.; Ishii, M.; Frolicher, T.L.; Toyama, K.; Plancherel, Y.; Aumont, O.; Fassbender, A.J.
Publication Date
2020-09
Journal
GEOPHYSICAL RESEARCH LETTERS, v.47, no.18
Publisher
AMER GEOPHYSICAL UNION
Abstract
A positive marine chemistry-climate feedback was originally proposed by Revelle and Suess (1957, https://doi.org/10.3402/tellusa.v9i1.9075), whereby the invasion flux of anthropogenic carbon into the ocean serves to inhibit future marine CO2 uptake through reductions to the buffering capacity of surface seawater. Here we use an ocean circulation-carbon cycle model to identify an upper limit on the impact of reemergence of anthropogenic carbon into the ocean's mixed layer on the cumulative airborne fraction of CO2 in the atmosphere. We find under an RCP8.5 emissions pathway (with steady circulation) that the cumulative airborne fraction of CO2 has a sevenfold reduction by 2100 when the CO2 buffering capacity of surface seawater is maintained at preindustrial levels. Our results indicate that the effect of reemergence of anthropogenic carbon into the mixed layer on the buffering capacity of CO2 amplifies the transient climate sensitivity of the Earth system
URI
https://pr.ibs.re.kr/handle/8788114/9043
DOI
10.1029/2020GL089275
ISSN
0094-8276
Appears in Collections:
Center for Climate Physics(기후물리 연구단) > 1. Journal Papers (저널논문)
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