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Publication Abstracts

Carlson et al. 2008

Carlson, A.E., D.W. Oppo, R.E. Came, A.N. LeGrande, L.D. Keigwin, and W.B. Curry, 2008: Subtropical Atlantic salinity variability and Atlantic meridional circulation during the last deglaciation. Geology, 36, 991-994, doi:10.1130/G25080A.1.

During the last deglaciation (ca. 21-10 ka), freshening of the North Atlantic surface likely caused reductions in Atlantic meridional overturning circulation (AMOC); the mechanisms related to AMOC recovery remain poorly understood. Here we present three new deglacial surface temperature and δ18Oseawater (δ18Osw) reconstructions from the western subtropical North and South Atlantic. Similarities to tropical Caribbean and western Atlantic δ18Osw records suggest that a salty surface water mass accumulated in the western Atlantic from 27°S to 33°N during periods of reduced AMOC. However, δ18Osw decreases led deep AMOC resumption by hundreds of years. We suggest that the northward export of salt previously trapped in the western Atlantic resulted in the early establishment of a shallow overturning circulation that eventually culminated in deep AMOC resumption, implying that AMOC may constitute a self-limiting system.

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BibTeX Citation

@article{ca05020r,
  author={Carlson, A. E. and Oppo, D. W. and Came, R. E. and LeGrande, A. N. and Keigwin, L. D. and Curry, W. B.},
  title={Subtropical Atlantic salinity variability and Atlantic meridional circulation during the last deglaciation},
  year={2008},
  journal={Geology},
  volume={36},
  pages={991--994},
  doi={10.1130/G25080A.1},
}

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RIS Citation

TY  - JOUR
ID  - ca05020r
AU  - Carlson, A. E.
AU  - Oppo, D. W.
AU  - Came, R. E.
AU  - LeGrande, A. N.
AU  - Keigwin, L. D.
AU  - Curry, W. B.
PY  - 2008
TI  - Subtropical Atlantic salinity variability and Atlantic meridional circulation during the last deglaciation
JA  - Geology
JO  - Geology
VL  - 36
SP  - 991
EP  - 994
DO  - 10.1130/G25080A.1
ER  -

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