02.05.2013

# New Publications

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Robock, Alan et al. (2013): Studying Geoengineering with Natural and Anthropogenic Analogs (accepted)

Robock, Alan; MacMartin, Douglas G.; Duren, Riley; Christensen, Matthew W. (2013): Studying geoengineering with natural and anthropogenic analogs. In: Climatic Change. DOI 10.1007/s10584-013-0777-5

"[T]here are also natural and anthropogenic analogs to SRM, such as volcanic eruptions in the case of stratospheric aerosol injection and ship tracks in the case of marine cloud albedo modification. It is essential to understand what we can learn from these analogs in order to validate models, particularly because of the problematic nature of outdoor experiments."

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01.04.2013

# New Publications

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Haywood, Jim M.; et al. (2013): Asymmetric forcing from stratospheric aerosols impacts Sahelian rainfall

Haywood, Jim M.; Jones, Andy; Bellouin, Nicolas; Stephenson, David (2013): Asymmetric forcing from stratospheric aerosols impacts Sahelian rainfall. In: Nature Climate change. DOI 10.1038/nclimate1857

Aerosol modeling study that is connected to SRM. "We suggest that sporadic volcanic eruptions in the Northern Hemisphere also strongly influence this gradient and cause Sahelian drought. Using de-trended observations from 1900 to 2010, we show that three of the four driest Sahelian summers were preceded by substantial Northern Hemisphere volcanic eruptions."

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06.11.2012

# Media

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[press review] Localised SRM study (1st update, 6.11.)

After the wide media coverage of the ocean fertilization project, a SRM study from MacMartin/Keith/Kravitz/Caldeira (2012) also got some feedback.


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26.10.2012

# Projects

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Update on SPICE Project

The EPSRC updated findings of the Stratospheric Particle Injection for Climate Engineering (SPICE).

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20.09.2012

# New Publications

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Hulme, M. (2012): Climate change: Climate engineering through stratospheric aerosol injection

Hulme, M. (2012): Climate change: Climate engineering through stratospheric aerosol injection. In: Progress in Physical Geography 36 (5), pp. 694–705

Analysing stratospheric aerosols on different social and political sacales. "In this progress report on climate change, I examine the growing literature dealing with the proposal to engineer global climate through the deliberate injection of aerosols into the stratosphere."

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11.09.2012

# New Publications

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Driscoll, Simon; et al. (2012): Coupled Model Intercomparison Project 5 (CMIP5) simulations of climate following volcanic eruptions

Driscoll, Simon; Bozzo, Alessio; Gray, Lesley J.; Robock, Alan; Stenchikov, Georgiy (2012): Coupled Model Intercomparison Project 5 (CMIP5) simulations of climate following volcanic eruptions. In: J. Geophys. Res. 117 (D17). DOI 10.1029/2012JD017607 - full paper

Climate modeling study of vulcanic eruptions. "This is also of concern for the accuracy of geoengineering modeling studies that assess the atmospheric response to stratosphere-injected particles."

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10.09.2012

# New Publications

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Laakso, Anton; et al. (2012): Stratospheric passenger flights are likely an inefficient geoengineering strategy

Laakso, Anton; Partanen, Antti-Ilari; Kokkola, Harri; Laaksonen, Ari; Lehtinen, Kari E. J.; Korhonen, Hannele (2012): Stratospheric passenger flights are likely an inefficient geoengineering strategy. In: Environ. Res. Lett 7 (3), S. 34021.

"Here, we show that using stratospheric passenger flights to inject sulfate aerosols would not cause significant forcing under realistic injection scenarios."

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31.08.2012

# New Publications

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McClellan, Justin; et al. (2012): Cost analysis of stratospheric albedo modification delivery systems

McClellan, Justin; Keith, David W.; Apt, Jay (2012): Cost analysis of stratospheric albedo modification delivery systems. In: Environ. Res. Lett 7 (3), pp. 34019.DOI 10.1088/1748-9326/7/3/034019

Aerosol SRM cost analysis. "We perform engineering cost analyses of systems capable of delivering 1–5 million metric tonnes (Mt) of albedo modification material to altitudes of 18–30 km."

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14.08.2012

# New Publications

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Pope, F. D.; et al. (2012): Stratospheric aerosol particles and solar-radiation management

Pope, F. D.; Braesicke, P.; Grainger, R. G.; Kalberer, M.; Watson, I. M.; Davidson, P. J.; Cox, R. A. (2012): Stratospheric aerosol particles and solar-radiation management. In: Nature Climate change.

Sulfur-SRM modelling study. "We show that aerosols with other compositions, such as minerals, could be used to dramatically increase the amount of light scatter achieved on a per mass basis, thereby reducing the particle mass required for injection."

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08.06.2012

# New Publications

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Kravitz, Ben; Robock, Alan; et al. (2012): Sensitivity of stratospheric geoengineering with black carbon to aerosol size and altitude of injection

Kravitz, Ben; Robock, Alan; Shindell, Drew T.; Miller, Mark A. (2012): Sensitivity of stratospheric geoengineering with black carbon to aerosol size and altitude of injection. In: J. Geophys. Res 117 (D9), pp. 1–22. doi:10.1029/2011JD017341

"Simulations of stratospheric geoengineering with black carbon (BC) aerosols using a general circulation model with fixed sea surface temperatures show that the climate a general circulation model with fixed sea surface temperatures effects strongly depend on aerosol size and altitude of injection."

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