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Ocean fertilization for geoengineering: A review of effectiveness, environmental impacts and emerging governance


Williamson, P and Wallace, DWR and Law, CS and Boyd, PW and Collos, Y and Croot, P and Denman, K and Riebessel, U and Takeda, S and Vivian, C, Ocean fertilization for geoengineering: A review of effectiveness, environmental impacts and emerging governance, Process Safety and Environmental Protection, 90, (6) pp. 475-488. ISSN 0957-5820 (2012) [Refereed Article]

DOI: doi:10.1016/j.psep.2012.10.007


Dangerous climate change is best avoided by drastically and rapidly reducing greenhouse gas emissions. Nevertheless, geoengineering options are receiving attention on the basis that additional approaches may also be necessary. Here we review the state of knowledge on large-scale ocean fertilization by adding iron or other nutrients, either from external sources or via enhanced ocean mixing. On the basis of small-scale field experiments carried out to date and associated modelling, the maximum benefits of ocean fertilization as a negative emissions technique are likely to be modest in relation to anthropogenic climate forcing. Furthermore, it would be extremely challenging to quantify with acceptable accuracy the carbon removed from circulation on a long term basis, and to adequately monitor unintended impacts over large space and time-scales. These and other technical issues are particularly problematic for the region with greatest theoretical potential for the application of ocean fertilization, the Southern Ocean. Arrangements for the international governance of further field-based research on ocean fertilization are currently being developed, primarily under the London Convention/London Protocol.

Item Details

Item Type:Refereed Article
Keywords:geoengineering, governance, iron, negative emission technologies, ocean fertilization, Southern Ocean
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and estuarine ecology (incl. marine ichthyology)
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Mitigation of climate change
Objective Field:Climate change mitigation strategies
UTAS Author:Boyd, PW (Professor Philip Boyd)
ID Code:95552
Year Published:2012
Web of Science® Times Cited:65
Deposited By:IMAS Research and Education Centre
Deposited On:2014-10-03
Last Modified:2014-10-03

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