KAUST DepartmentEarth Science and Engineering Program
Physical Science and Engineering (PSE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/663959
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AbstractAbstract. The interactions between aeolian dust and anthropogenic air pollution, notably chemical ageing of mineral dust and coagulation of dust and pollution particles, modify the atmospheric aerosol composition and burden. Since the aerosol particles can act as cloud condensation nuclei, this affects the radiative transfer not only directly via aerosol–radiation interactions, but also indirectly through cloud adjustments. We study both radiative effects using the global ECHAM/MESSy atmospheric chemistry-climate model (EMAC) which combines the Modular Earth Submodel System (MESSy) with the European Centre/Hamburg (ECHAM) climate model. Our simulations show that dust–pollution–cloud interactions reduce the condensed water path and hence the reflection of solar radiation. The associated climate warming outweighs the cooling that the dust–pollution interactions exert through the direct radiative effect. In total, this results in a net warming by dust–pollution interactions which moderates the negative global anthropogenic aerosol forcing at the top of the atmosphere by (0.2 ± 0.1) W m−2.
CitationKlingmüller, K., Karydis, V. A., Bacer, S., Stenchikov, G. L., & Lelieveld, J. (2020). Weaker cooling by aerosols due to dust–pollution interactions. Atmospheric Chemistry and Physics, 20(23), 15285–15295. doi:10.5194/acp-20-15285-2020
SponsorsThis research has been supported by the King Abdullah University of Science and Technology (grant CRG3, grant no. URF/1/2180-01-01).
The research reported in this publication has received funding from the MaxWater initiative of the Max Planck Society and the King Abdullah University of Science and Technology project “Combined Radiative and Air Quality Effects of Anthropogenic Air Pollution and Dust over the Arabian Peninsula”.
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