Academic Publications

Jana Sillmann, Timothy M. Lenton, Anders Levermann, Konrad Ott, Mike Hulme, Francois Benduhn, and Joshua Horton. 2015. “Climate Emergencies Do Not Justify Engineering the Climate.” Nature Climate Change. Publisher's Version
Jason J. Blackstock, Neil Craik, Jack Doughty, and Joshua Horton. 2015. “Designing Procedural Mechanisms for the Governance of Solar Radiation Management Field Experiments: Workshop Report”. Publisher's Version
Joshua Horton. 2015. “The Emergency Framing of Solar Geoengineering: Time for a Different Approach.” The Anthropocene Review. Publisher's Version
Hossein Safaei and David Keith. 2015. “How much bulk energy storage is needed to decarbonize electricity?” Energy and Environmental Science, 8, 12, Pp. 3409-3417. Publisher's Version ees_safaei-keith_bulk_storage_2015.pdf
Steven R. H. Barrett, Raymond L. Speth, Sebastian D. Eastham, Irene C. Dedoussi, Akshay Ashok, Robert Malina, and David Keith. 2015. “Impact of the Volkswagen emissions control defeat device on US public health.” Environmental Research Letters, 10, 11, Pp. 114005. Publisher's Version barrett_et_al._-_2015_-_impact_of_the_volkswagen_emissions_control_defeat_.pdf
Joshua Horton, Andrew Parker, and David Keith. 2015. “Liability for Solar Geoengineering: Historical Precedents, Contemporary Innovations, and Governance Possibilities.” NYU Environmental Law Journal, 22, Pp. 225-273. Publisher's Version 176.horton.keith_.liabilityforsolargeoengineering.pdf
Debra Weisenstein, David Keith, and John Dykema. 2015. “Solar geoengineering using solid aerosol in the stratosphere.” Atmospheric Chemistry and Physics, 15, Pp. 11835-11859. Publisher's Version weisenstein_et_al._-_2015_-_solar_geoengineering_using_solid_aerosol_in_the_st.pdf
David Keith and Douglas G. MacMartin. 2015. “A temporary, moderate and responsive scenario for solar geoengineering.” Nature Climate Change, 5. Publisher's Version 174.keith_.macmartin.atemporarymoderateandresponsivescenarioforsolargeoengineering.pdf
Lee Miller, Nathaniel A. Brunsell, David B. Mechem, Fabian Gans, Andrew J. Monaghan, Robert Vautard, David Keith, and Axel Kleidon. 2015. “Two methods for estimating limits to large-scale wind power generation.” Proceedings of the National Academy of Sciences of the United States, 112, Pp. 11169–11174. Publisher's Version miller_et_al._-_2015_-_two_methods_for_estimating_limits_to_large-scale_w.pdf
David Keith and Andy Parker. 2015. “Will solar geoengineering help us manage the risks of climate change?” Our world and us: How our environment and our societies will change, Pp. 76-92. Publisher's Version 175.keith_.parker.willsolargeoengineeringhelpusmanagetherisksofclimatechange.pdf
Kerry Emanuel, Frauke Hoss, David Keith, Zhiming Kuang, Julie Lundquist, and Lee Miller. 2015. “Workshop on Climate Effects of Wind Turbines, American Meteorological Society”. Publisher's Version emanuel_et_al._-_2015_-_workshop_on_climate_effects_of_wind_turbines_amer.pdf
Sebastian D. Eastham, Debra K. Weisenstein, and Steven R. H. Barrett. 2014. “Development and evaluation of the unified tropospheric–stratospheric chemistry extension (UCX) for the global chemistry-transport model GEOS-Chem.” Atmospheric Environment, 89, Pp. 52-63. Publisher's VersionAbstract

Global chemistry-transport models (CTMs) typically use simplified parameterizations or relaxation to climatology to estimate the chemical behavior of the stratosphere only in the context of its impact on tropospheric chemistry. This limits investigation of stratospheric chemistry and interactions between tropospheric and stratospheric chemistry-transport processes. We incorporate stratospheric chemical and physical processes into the model GEOS-Chem in the form of a unified chemistry extension (UCX). The stratospheric chemistry framework from NASA’s Global Modeling Initiative (GMI) is updated in accordance with JPL 10-06 and combined with GEOS-Chem’s existing widely applied and validated tropospheric chemistry to form a single, unified gas-phase chemistry scheme. Aerosol calculations are extended to include heterogeneous halogen chemistry and the formation, sedimentation and evaporation of polar stratospheric clouds (PSCs) as well as background liquid binary sulfate (LBS) aerosols. The Fast-JX v7.0a photolysis scheme replaces a hybrid of Fast-J and Fast-JX v6.2, allowing photolytic destruction at frequencies relevant to the stratosphere and of species not previously modeled. Finally, new boundary conditions are implemented to cover both surface emissions of new species and mesospheric behavior. Results for four simulation years (2004-2007) are compared to those from the original, tropospheric model and to in situ and satellite-based measurements. We use these comparisons to show that the extended model is capable of modeling stratospheric chemistry efficiently without compromising the accuracy of the model at lower altitudes, perturbing mean OH below 250 hPa by less than 5% while successfully capturing stratospheric behavior not previously captured in GEOS-Chem such as formation and collapse of the Antarctic ozone hole. These extensions (with supporting validation and intercomparison) enable an existing and extensively validated tropospheric CTM to be used to investigate a broader set of atmospheric chemistry problems and leverages GEOS-Chem’s existing tropospheric treatment.

Eastham Weisenstein Barrett 2014
David Keith, Riley Duren, and Douglas MacMartin. 2014. “Field experiments on solar geoengineering: report of a workshop exploring a representative research portfolio.” Philosophical Transactions of the Royal Society A, 372. Publisher's Version 171.keith_.fieldexperimentsonsolargeoengineering.pdf
MacMartin, D. G., B. Kravitz, and D. W. Keith. 2014. “Geoengineering: the world’s largest control problem.” American Control Conference, Pp. 2401-2406. Publisher's Version 168.macmartin.controlproblem.pdf
Ben Kravitz, Douglas MacMartin, Alan Robock, Philip Rasch, Katharine Ricke, Jason Cole, Charles Curry, Pete Irvine, Duoying Ji, David Keith, Jon Egill Kristjánsson, John Moore, Helene Muri, Balwinder Singh, Simone Tilmes, Shingo Watanabe, Shuting Yang, and Jin-Ho Yoon. 2014. “A multi-model assessment of regional climate disparities caused by solar geoengineering.” Environmental Research Letters, 9. Publisher's Version kravitz_et_al._-_2014_-_a_multi-model_assessment_of_regional_climate_dispa.pdf
David Keith. 2014. “Not a superpower.” Policy Options, 35, Pp. 18-20. Publisher's Version 170.keith_.notasuperpower.pdf
Joshua Horton. 2014. “Solar Geoengineering: Reassessing Benefits, Costs, and Compensation.” Ethics, Policy & Environment. Publisher's Version
Douglas MacMartin, Ken Caldeira, and David Keith. 2014. “Solar geoengineering to limit rate of temperature change.” Philosophical Transactions of the Royal Society A, 372. Publisher's Version 172.macmartin.caldeira.keith_.solargeoengineeringtolimittherateoftemperaturechange.pdf
John Dykema, David Keith, James G. Anderson, and Debra Weisenstein. 2014. “Stratospheric controlled perturbation experiment (SCoPEx): a small-scale experiment to improve understanding of the risks of solar geoengineering.” Philosophical Transactions of the Royal Society A, 372. Publisher's Version dykema_et_al._-_2014_-_stratospheric_controlled_perturbation_experiment_.pdf
Amanda Adams and David Keith. 2013. “Are global wind power resource estimates overstated?” Environmental Research Letters, 8. Publisher's Version 160.adams_.keith_.globalwindpowerestimates.e.pdf