Format:
Online-Ressource
ISSN:
1814-9332
Content:
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.
In:
volume:20
In:
number:5
In:
year:2024
In:
pages:1195-1211
In:
extent:17
In:
Climate of the past, Katlenburg-Lindau : Copernicus Ges., 2005-, 20, Heft 5 (2024), 1195-1211 (gesamt 17), 1814-9332
Language:
English
DOI:
10.5194/cp-20-1195-2024
URN:
urn:nbn:de:101:1-2405300435337.751034494264
URL:
https://doi.org/10.5194/cp-20-1195-2024
URL:
https://nbn-resolving.org/urn:nbn:de:101:1-2405300435337.751034494264
URL:
https://d-nb.info/1331182271/34
URL:
https://cp.copernicus.org/articles/20/1195/2024/cp-20-1195-2024.pdf
URL:
https://cp.copernicus.org/articles/20/1195/2024/
Bookmarklink