Show simple item record

dc.contributor.authorJones, Andy
dc.contributor.authorHaywood, James M.
dc.contributor.authorBoucher, Olivier
dc.date.accessioned2013-05-08T10:37:20Z
dc.date.issued2009
dc.description.abstract[1] Theoretical potential geoengineering solutions to the global warming problem have recently been proposed. Here, we present an idealized study of the climate response to deliberately seeding large-scale stratocumulus cloud decks in the North Pacific, South Pacific, and South Atlantic, thereby inducing cooling via aerosol indirect effects. Atmosphere-only, atmosphere/mixed-layer ocean, and fully coupled atmosphere/ocean versions of the Met Office Hadley Centre model are used to investigate the radiative forcing, climate efficacy, and regional response of temperature, precipitation, and net primary productivity to such geoengineering. The radiative forcing simulations indicate that, for our parameterization of aerosol indirect effects, up to 35% of the radiative forcing due to current levels of greenhouse gases could be offset by stratocumulus modification. Equilibrium simulations with the atmosphere/mixed-layer ocean model, wherein each of the three stratocumulus sheets is modified in turn, reveal that the most efficient cooling per unit radiative forcing occurs when the South Pacific stratocumulus sheet is modified. Transient coupled model simulations suggest that geoengineering all three stratocumulus areas delays the simulated global warming by about 25 years. These simulations also indicate that, while some areas experience increases in precipitation and net primary productivity, sharp decreases are simulated in South America, with particularly detrimental impacts on the Amazon rain forest. These results show that, while some areas benefit from geoengineering, there are significant areas where the response could be very detrimental with implications for the practical applicability of such a scheme.en_GB
dc.identifier.citationVol. 114 (D10), article D10106en_GB
dc.identifier.doi10.1029/2008JD011450
dc.identifier.urihttp://hdl.handle.net/10871/9161
dc.language.isoenen_GB
dc.publisherAmerican Geophysical Union (AGU)en_GB
dc.relation.urlhttp://dx.doi.org/10.1029/2008JD011450en_GB
dc.subjectgeoengineeringen_GB
dc.subjectclimate changeen_GB
dc.subjectcloud modificationen_GB
dc.titleClimate impacts of geoengineering marine stratocumulus cloudsen_GB
dc.typeArticleen_GB
dc.date.available2013-05-08T10:37:20Z
dc.descriptionCopyright © 2000 American Geophysical Unionen_GB
dc.identifier.eissn2169-8961
dc.identifier.journalJournal of Geophysical Research: Atmospheresen_GB


Files in this item

This item appears in the following Collection(s)

Show simple item record