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

The impacts of deglacial meltwater forcing on the South Atlantic Ocean deep circulation since the Last Glacial Maximum

Full text
Author(s):
Marson, J. M. [1] ; Wainer, I. [1] ; Mata, M. M. [2] ; Liu, Z. [3, 4]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, Inst Oceanog, Sao Paulo - Brazil
[2] Fundacao Univ Fed Rio Grande, Inst Oceanog, Rio Grande, RS - Brazil
[3] Univ Wisconsin, Ctr Climat Res, Madison, WI - USA
[4] Univ Wisconsin, Dept Atmospher & Ocean Sci, Madison, WI - USA
Total Affiliations: 4
Document type: Journal article
Source: Climate of the Past; v. 10, n. 5, p. 1723-1734, 2014.
Web of Science Citations: 6
Abstract

A NCAR-CCSM3 (National Center for Atmospheric Research - Community Climate System Model version 3) state-of-the-art transient paleoclimate simulation with prescribed freshwater inflows is used to investigate the changes and evolution of the South Atlantic water mass structure from the Last Glacial Maximum (LGM) to the present day. Model results show that 21 000 yr ago the water column was substantially stratified due to the presence of a saltier-than-today Antarctic Bottom Water (AABW), forming a salinity barrier that prevented dense waters from the Northern Hemisphere from sinking. This salinity barrier started to erode after the termination of the Heinrich event 1, when its associated meltwater was transported southward, freshening the AABW. The removal of the barrier after 14 ka triggered the production of the North Atlantic Deep Water (NADW), which spread into the deeper layers of the South Atlantic at the onset of the Holocene. At this point, the NADW acquired its modern-day structure, establishing a deeper Atlantic meridional overturning circulation (AMOC). (AU)

FAPESP's process: 11/02047-9 - Meltwater pulses in the Last Glacial Maximum transition: impacts on physical and dynamical structure of Southern Ocean
Grantee:Juliana Marini Marson
Support type: Scholarships in Brazil - 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