Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Reconstruction of the South Atlantic Subtropical Dipole index for the past 12,000 years from surface temperature proxy

Full text
Wainer, Ilana [1] ; Prado, Luciana Figueiredo [1] ; Khodri, Myriam [2] ; Otto-Bliesner, Bette [3]
Total Authors: 4
[1] Univ Sao Paulo, Inst Oceanog, BR-05508120 Sao Paulo - Brazil
[2] UPMC, Univ Paris 04, CNRS, IRD MNHN, LOCEAN Lab, F-75005 Paris - France
[3] Natl Ctr Atmospher Res, Climate & Global Dynam Div, Boulder, CO 80307 - USA
Total Affiliations: 3
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 4, JUN 13 2014.
Web of Science Citations: 5

Climate indices based on sea surface temperature (SST) can synthesize information related to physical processes that describe change and variability in continental precipitation from floods to droughts. The South Atlantic Subtropical Dipole index (SASD) is based on the distribution of SST in the South Atlantic and fits these criteria. It represents the dominant mode of variability of SST in the South Atlantic, which is modulated by changes in the position and intensity of the South Atlantic Subtropical High. Here we reconstructed an index of the South Atlantic Ocean SST (SASD-like) for the past twelve thousand years (the Holocene period) based on proxy-data. This has great scientific implications and important socio-economic ramifications because of its ability to infer variability of precipitation and moisture over South America where past climate data is limited. For the first time a reconstructed index based on proxy data on opposite sides of the SASD-like mode is able to capture, in the South Atlantic, the significant cold events in the Northern Hemisphere at 12.9-11.6 kyr BP and 8.6-8.0 ky BP. These events are related, using a transient model simulation, to precipitation changes over South America. (AU)

FAPESP's process: 13/11496-7 - Air-sea interaction in the South Atlantic region: mechanisms of climatic variability during the last millennium
Grantee:Luciana Figueiredo Prado
Support type: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 13/02111-4 - Investigation of the evolution of the sub-surface ocean in the South Atlantic for the last millenium: impact on climate change
Grantee:Ilana Elazari Klein Coaracy Wainer
Support type: Scholarships abroad - Research