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Geoengineering: The world's largest control problem

MacMartin, Douglas G. and Kravitz, Ben and Keith, David W. (2014) Geoengineering: The world's largest control problem. In: 2014 American Control Conference. IEEE , Piscataway, NJ, pp. 2401-2406. ISBN 978-1-4799-3272-6.

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Solar geoengineering (or Solar Radiation Management, SRM) refers to any intentional, large-scale manipulation of the Earth's incoming solar radiation to offset some of the effects of anthropogenic greenhouse gases, reducing the associated risks from climate changes. Examples of such methods are injecting aerosols into the stratosphere or increasing marine cloud reflectivity, both of which would reflect some sunlight back to space. There are many serious concerns associated with any such approach, and also many challenges. One often overlooked aspect in geoengineering research is that this is a control problem, requiring (a) feedback of the observed climate state to manage significant uncertainty in both the radiative forcing and the climate's dynamic response to this forcing, and (b) optimization of the distribution of radiative effect to minimize regional disparities as well as side-effects from the geoengineering implementation. We present recent progress on control for this challenging problem, building on [1, 2], and discuss open research gaps. This is the first time an explicit external feedback loop has been implemented in a fully coupled general circulation model of the Earth's climate.

Item Type:Book Section
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URLURL TypeDescription DOIArticle
MacMartin, Douglas G.0000-0003-1987-9417
Kravitz, Ben0000-0001-6318-1150
Additional Information:© 2014 AACC. BK is supported by the Fund for Innovative Climate and Energy Research (FICER). The Pacific Northwest National Laboratory is operated for the U.S. Department of Energy by Battelle Memorial Institute under contract DE-AC05-75RL01830. DGM thanks Carnegie Institution of Science and Ken Caldeira in particular for hospitality and computing resources used in this work.
Funding AgencyGrant Number
Fund for Innovative Climate and Energy Research (FICER)UNSPECIFIED
Department of Energy (DOE)DE-AC05-75RL01830
Record Number:CaltechAUTHORS:20150320-092947645
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Official Citation:MacMartin, D.G.; Kravitz, B.; Keith, D.W., "Geoengineering: The world's largest control problem," American Control Conference (ACC), 2014 , vol., no., pp.2401,2406, 4-6 June 2014 doi: 10.1109/ACC.2014.6858658 URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:55942
Deposited By: Tony Diaz
Deposited On:20 Mar 2015 16:37
Last Modified:10 Nov 2021 20:52

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