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The climate effects of anthropogenic aerosols depend on their spatial distribution, but emission location is often ignored in evaluating their climate impact. Here the authors show drastic divergence in the simulated global temperature response to identical aerosols emitted from eight key geopolitical regions.

Anthropogenic aerosol and greenhouse gas concentrations are spatially uncorrelated, but the climate response to each shows a similar spatial pattern. Here the authors show that two-thirds of the spatial similarity in the full response manifests through fast-acting atmosphere and land surface processes alone.