Document Type
Article
Publication Date
2010
DOI
10.1029/2009gl042013
Publication Title
Geophysical Research Letters
Volume
37
Issue
4
Pages
L04603 (1-5)
Abstract
During periods of reduced Atlantic meridional overturning circulation (AMOC) associated with a freshening of northern North Atlantic surface water, paleo proxy records indicate a corresponding surface salinity increase over the entire tropical Atlantic. Although latitudinal-shifts in the mean position of the Atlantic Intertropical Convergence Zone (ITCZ) can explain certain features of the paleo salinity reconstructions, this mechanism does not offer an explanation for the reconstructed basin-wide paleo-salinity response to AMOC change. Here, we present new results from general circulation model simulations that suggest the sea surface salinity (SSS) increase in the tropical north Atlantic during periods of weakened AMOC is mainly controlled by the atmospheric response to the North Atlantic cooling, while the oceanic teleconnection contributes to increased SSS over the equatorial and south tropical Atlantic Ocean.
Original Publication Citation
Wan, X. Q., Chang, P., & Schmidt, M. W. (2010). Causes of tropical Atlantic paleo-salinity variation during periods of reduced AMOC. Geophysical Research Letters, 37(4), L04603. doi:10.1029/2009gl042013
Repository Citation
Wan, Xiuquan; Chang, Ping; and Schmidt, Matthew W., "Causes of Tropical Atlantic Paleo-Salinity Variation During Periods of Reduced AMOC" (2010). OES Faculty Publications. 213.
https://digitalcommons.odu.edu/oeas_fac_pubs/213