Aerosol uncertainties in tropical precipitation changes for the mid-Pliocene warm period
Abstract 2 concentration exceeding 400 ppmv with minor changes in continental and orbital configurations. Simulations of this past climate state have improved with newer models but still show some substantial differences from proxy reconstructions. There is little information about atmospheric aerosol concentrations during the Pliocene, but previous work suggests that it could have been quite different from the modern period. Here we apply idealised aerosol scenario experiments to examine the importance of aerosol forcing on mPWP tropical precipitation and the possibility of aerosol uncertainty explaining the mismatch between reconstructions and simulations. The absence of industrial pollutants leads to further warming, especially in the Northern Hemisphere. The Intertropical Convergence Zone (ITCZ) becomes narrower and stronger and shifts northward after removal of anthropogenic aerosols. Though not affecting the location of monsoon domain boundary, removal of anthropogenic aerosol alters the amount of rainfall within the domain, increasing summer rain rate over eastern and southern Asia and western Africa. This work demonstrates that uncertainty in aerosol forcing could be the dominant driver in tropical precipitation changes during the mid-Pliocene: causing larger impacts than the changes in topography and greenhouse gases.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Aerosol uncertainties in tropical precipitation changes for the mid-Pliocene warm period ; volume:20 ; number:5 ; year:2024 ; pages:1195-1211 ; extent:17
Climate of the past ; 20, Heft 5 (2024), 1195-1211 (gesamt 17)
- Creator
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Zhao, Anni
Feng, Ran
Brierley, Chris M.
Zhang, Jian
Hu, Yongyun
- DOI
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10.5194/cp-20-1195-2024
- URN
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urn:nbn:de:101:1-2405300435337.751034494264
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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14.08.2025, 10:58 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Zhao, Anni
- Feng, Ran
- Brierley, Chris M.
- Zhang, Jian
- Hu, Yongyun
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