| Full text | |
| Author(s): |
Justino, F.
[1]
;
Marengo, J.
[2]
;
Kucharski, F.
[3]
;
Stordal, F.
[4]
;
Machado, J.
[1]
;
Rodrigues, M.
[1]
Total Authors: 6
|
| Affiliation: | [1] Fed Univ Vicosa PH Rolfs, Dept Agr Engn, BR-36570000 Vicosa, MG - Brazil
[2] Natl Inst Space Res, Ctr Earth Syst Sci, BR-12630000 Sao Jose Dos Campos, SP - Brazil
[3] Abdus Salaam Int Ctr Theoret Phys, I-34151 Trieste - Italy
[4] Univ Oslo, Dept Geosci, N-0316 Oslo - Norway
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Climate Dynamics; v. 42, n. 3-4, p. 843-858, FEB 2014. |
| Web of Science Citations: | 3 |
| Abstract | |
A coupled global atmosphere-ocean model is used to study the influence of the Antarctica ice sheet in a configuration that mimics that of the early Miocene on the atmospheric and oceanic circulations. Based on different climate simulations of the present day (CTR) and conducted with distinct Antarctic ice sheet topography (AIS-EXP), it is found that the reduction of the Antarctic ice sheet topography (AIS) induces warming of the Southern Hemisphere and reduces the meridional thermal gradient. Consequently, the atmospheric transient low level eddy heat flux and the eddy momentum flux are reduced causing the reduced transport of heat from the mid-latitudes to the pole. The stationary flow and transient wave anomalies generate changes in the SSTs which modify the rate of deep water formation, strengthening the formation of the Antarctic Bottom Water. Substantial changes are predicted to occur in the atmospheric and oceanic heat transport and a comparison between the total heat transport of the atmosphere-ocean system, as simulated by the AIS-EXP and the CTR runs, shows that the reduction of the AIS height leads to reduced Southern Hemisphere poleward and increased equatorward heat transport. These results are in agreement with reduced storm track activities and baroclinicity. (AU) | |
| FAPESP's process: | 11/20636-1 - The Antarctic ice mantle and the climate in South America |
| Grantee: | Jose Antonio Marengo Orsini |
| Support Opportunities: | Research Grants - Visiting Researcher Grant - Brazil |