Invitation for aerosol-cloud based SRM (MCB, MCT, CCT) abstracts to AGU session A063

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Haruki Hirasawa

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Jul 3, 2025, 2:24:25 PM7/3/25
to geoengineering
Hi all,

I'm posting to advertise a session we are convening at the AGU Fall Meeting titled A063: Exploring Inadvertent and Deliberate Aerosol Perturbations on Clouds and the Climate. We are inviting studies on aerosol perturbations on the climate. Both inadvertent, such as ship tracks and effusive volcanoes, and deliberate, such as marine cloud brightening, mixed phase cloud thinning, and cirrus cloud thinning. We are interested in research across scales and tools ranging from process studies to impacts modelling. 

A063 - Exploring Inadvertent and Deliberate Aerosol Perturbations on Clouds and the Climate

AbstractAerosol-cloud interactions are responsible for substantial but uncertain radiative effects, with important implications for our understanding of recent climate changes and the effects of potential climate intervention such as marine cloud brightening, mixed phase cloud thinning, and cirrus cloud thinning. Process understanding and more credible modelling capabilities are necessary to quantify these effects. “Opportunistic” experiments created by localized aerosol perturbations allow estimates of the causal effect of aerosols on clouds. This session invites studies examining aerosol perturbations and the processes governing their distribution/composition, effects on clouds/atmosphere, and novel methods for analyzing observations such as by using machine learning. We invite observational and modelling studies across scales that examine responses to opportune events and intentional emissions, and the representation of these events in global models with aerosol and cloud parameterizations. This session seeks to connect different facets of research on aerosol perturbations to help clarify uncertainties in aerosol-cloud interactions.

Regards,
Haruki Hirasawa, University of Washington
Tianle Yuan, University of Maryland Baltimore County
Lucas McMichael, University of Washington 
Haipeng Zhang, University of Maryland Baltimore County
Cindy Wang, Cornell University

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