Potential climate engineering effectiveness and side effects during a high CO2-emissions scenario

Keller, David, Feng, Yuming and Oschlies, Andreas (2014) Potential climate engineering effectiveness and side effects during a high CO2-emissions scenario Nature Communications, 5 (3304). DOI 10.1038/ncomms4304.

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Abstract

The realization that mitigation efforts to reduce CO2 emissions have, until now, been relatively ineffective has led to an increasing interest in climate engineering as a possible means of preventing potentially catastrophic consequences of climate change. While many studies have addressed the potential effectiveness of individual methods there have been few attempts to compare them. We use an Earth system model to compare the effectiveness and side effects of afforestation, artificial ocean upwelling, ocean iron fertilization, ocean alkalinization, and solar radiation management during a high CO2-emissions scenario. We find that even when applied continuously and at scales as large as currently deemed possible, all methods are, individually, either relatively ineffective with limited (<8%) warming reductions, or they have severe side effects and cannot be stopped without causing rapid climate change. Our simulations suggest that the potential for these types of climate engineering to make up for failed mitigation may be very limited.

Document Type: Article
Additional Information: WOS:000332668000004
Keywords: Climate engineering, climate change
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-BM Biogeochemical Modeling
Kiel University
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
DOI etc.: 10.1038/ncomms4304
ISSN: 2041-1723
Projects: SPP 1689, Future Ocean
Date Deposited: 07 Mar 2014 08:23
Last Modified: 23 Feb 2017 08:25
URI: http://eprints.uni-kiel.de/id/eprint/23725

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