Loading [MathJax]/jax/output/HTML-CSS/fonts/TeX/fontdata.js
Preprints
https://doi.org/10.22541/essoar.170158317.78990757/v1
https://doi.org/10.22541/essoar.170158317.78990757/v1
31 Jan 2024
 | 31 Jan 2024

Increasing Aerosol Direct Effect Despite Declining Global Emissions in MPI-ESM1.2

Antoine Hermant, Linnea Huusko, and Thorsten Mauritsen

Abstract. Anthropogenic aerosol particles partially mask global warming driven by greenhouse gases, both directly by reflecting sunlight back to space and indirectly by increasing cloud reflectivity. In recent decades, the emissions of anthropogenic aerosols have declined globally, and at the same time shifted from the North American and European regions to foremost Southeast Asia. Using simulations with the Max Planck Institute Earth System Model version 1.2 (MPI-ESM1.2) we find that the direct effect of aerosols has continued to increase, despite declining emissions. Concurrently, the indirect effect has diminished in approximate proportion to emissions. In this model, the enhanced efficiency of aerosol radiative forcing to emissions is associated with less cloud masking, longer atmospheric residence time, and differences in aerosol optical properties.

Share

Journal article(s) based on this preprint

25 Sep 2024
Increasing aerosol direct effect despite declining global emissions in MPI-ESM1.2
Antoine Hermant, Linnea Huusko, and Thorsten Mauritsen
Atmos. Chem. Phys., 24, 10707–10715, https://doi.org/10.5194/acp-24-10707-2024,https://doi.org/10.5194/acp-24-10707-2024, 2024
Short summary
Download

The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
Aerosol particles, from natural and human sources, have a cooling effect on the climate,...
Share