Jim Haywood

On the Range of Marine Cloud Brightening Radiative Forcing across Earth System Models

Haruki Hirasawa, Knut von Salzen, Matthew Henry, Josh Smith et autres

Abstract. Marine cloud brightening (MCB) is a solar radiation modification method that involves using injections of sea salt aerosol (iSSA) particles to increase cloud albedo and cool surface climate. Earth system models (ESMs) are crucial tools for projecting the potential climate response …

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Supplementary material to "On the Range of Marine Cloud Brightening Radiative Forcing across Earth System Models"

Haruki Hirasawa, Knut von Salzen, Matthew Henry, Josh Smith et autres

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The Geoengineering Model Intercomparison Project (GeoMIP) contribution to CMIP7 – description of new experimental protocols and preliminary results

Daniele Visioni, Alan D. Robock, Alistair Duffey, Matthew Henry et autres

The Geoengineering Model Intercomparison Project (GeoMIP) is a coordinated international model intercomparison effort with the aim of providing robust experimental protocols for simulations of various Solar Radiation Modification (SRM) methods. Through many iterations and discussions within the GeoMIP community, it has become …

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Stratospheric ozone projections under sulfur-based stratospheric aerosol injection: Insights from the multi-model G6-1.5K-SAI experiment

Ewa Bednarz, Amy Hawes Butler, Jim Haywood, Matthew Henry et autres

Owing to the crucial role of stratospheric ozone in shielding the Earth from harmful solar ultraviolet radiation, impacts of human activities on the ozone layer remain of interest. Here we provide an assessment of the potential impacts of Stratospheric Aerosol Injection (SAI), …

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Assessing combinations of regional MCB designed to target multiple climate response objectives

Matthew Henry, Haruki Hirasawa, Fiona M. O’Connor, Jim Haywood

Abstract. Marine Cloud Brightening (MCB) is a proposed method of Solar Radiation Modification (SRM). MCB proposes the injection of sea salt aerosols into marine clouds to enhance their reflectivity aiming to counteract greenhouse gas (GHG) driven warming. Modelling suggests that the climate …

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Data from "Stratospheric ozone projections under sulfur-based stratospheric aerosol injection: Insights from the multi-model G6-1.5K-SAI experiment" by Bednarz et al. (2026)

Ewa Bednarz, Amy Hawes Butler, Jim Haywood, Matthew Henry et autres

Data from: Bednarz, E. M., Butler, A. H., Haywood, J. M., Henry, M., Jones, A., Kravitz, B., Lee, W. R., MacMartin, D. G., Maycock, A. C., Sekiya, T., Watanabe, S., and Visioni, D.: Stratospheric ozone projections under sulfur-based stratospheric aerosol injection: Insights …

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Data from "Stratospheric ozone projections under sulfur-based stratospheric aerosol injection: Insights from the multi-model G6-1.5K-SAI experiment" by Bednarz et al. (2026)

Ewa Bednarz, Amy Hawes Butler, Jim Haywood, Matthew Henry et autres

Data from: Bednarz, E. M., Butler, A. H., Haywood, J. M., Henry, M., Jones, A., Kravitz, B., Lee, W. R., MacMartin, D. G., Maycock, A. C., Sekiya, T., Watanabe, S., and Visioni, D.: Stratospheric ozone projections under sulfur-based stratospheric aerosol injection: Insights …

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G6-1.5K-SAI and G6sulfur: changes in impacts and uncertainty depending on stratospheric aerosol injection strategy in the Geoengineering Model Intercomparison Project

Walker Lee, Daniele Visioni, Benjamin Wagman, Christopher Robert Wentland et autres

Abstract. We report initial results for G6-1.5K-SAI, a climate model experiment proposed by the Geoengineering Model Intercomparison Project (GeoMIP). G6-1.5K-SAI, which simulates a stratospheric aerosol injection (SAI) to limit global warming to ∼ 1.5 °C above preindustrial in each model, features several …

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Efficacy assessment of stratospheric aerosol scrubbing as a counter climate intervention strategy

Anthony Crawford Jones, Jim Haywood, Matthew Henry, Alistair Duffey

Stratospheric Aerosol Injection (SAI) has been proposed to counteract global warming. Countering SAI may prove attractive to actors who oppose deployment and methods have been suggested but not tested for efficacy. Using a global climate model with double moment aerosol microphysics, we …

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G6-1.5K-MCB: Marine Cloud Brightening scenario design for the Geoengineering Model Intercomparison Project (GeoMIP) in CESM2.1, E3SMv2.0, and UKESM1.1

Haruki Hirasawa, Matthew Henry, Philip John Rasch, Robert W. Wood et autres

Abstract. We present a protocol for scenario simulations of marine cloud brightening (MCB) solar radiation modification (SRM), which we design for inclusion as a bridge simulation in the Geoengineering Model Intercomparison Project (GeoMIP). This protocol, named G6-1.5K-MCB, parallels the existing G6-1.5K-SAI, but …

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Predicting Aviation Contrail Occurrence Using Bayesian Population Statistics From Reanalysis Data

Daniel Williams, Cyril Julien Morcrette, Jim Haywood

Despite the ongoing climate crisis and recent pandemic-induced disruption, the aviation sector is expected to experience 5% annual growth over the next decade. While the industry moves towards decarbonisation through use of sustainable fuels and improved operating practices, the contribution by non-CO2 …

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Efficacy assessment of Stratospheric Aerosol Scrubbing as a Counter Climate Intervention strategy

Anthony Crawford Jones, Jim Haywood, Matthew Henry, Alistair Duffey

Abstract. Stratospheric Aerosol Injection (SAI) has been proposed to counteract global warming. Countering SAI may prove attractive to actors who oppose deployment and methods have been suggested but not tested for efficacy. Using a global climate model with double moment aerosol microphysics, …

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