Causes of Tropical Atlantic Paleo-Salinity Variation During Periods of Reduced AMOC
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 positi...
Published in: | Geophysical Research Letters |
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ftolddominionuni:oai:digitalcommons.odu.edu:oeas_fac_pubs-1235 2023-06-11T04:14:19+02:00 Causes of Tropical Atlantic Paleo-Salinity Variation During Periods of Reduced AMOC Wan, Xiuquan Chang, Ping Schmidt, Matthew W 2010-01-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/oeas_fac_pubs/213 https://doi.org/10.1029/2009gl042013 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1235/viewcontent/Wan_2010_Causes_of_tropical_Atlantic_paleo_sal.pdf unknown ODU Digital Commons https://digitalcommons.odu.edu/oeas_fac_pubs/213 doi:10.1029/2009gl042013 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1235/viewcontent/Wan_2010_Causes_of_tropical_Atlantic_paleo_sal.pdf OES Faculty Publications Sea surface temperature Thermohaline circulation Model Variability Tropical Atlantic AMOC Geology Oceanography Paleontology article 2010 ftolddominionuni https://doi.org/10.1029/2009gl042013 2023-05-08T17:59:46Z 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. Article in Journal/Newspaper North Atlantic Old Dominion University: ODU Digital Commons Geophysical Research Letters 37 4 |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Sea surface temperature Thermohaline circulation Model Variability Tropical Atlantic AMOC Geology Oceanography Paleontology |
spellingShingle |
Sea surface temperature Thermohaline circulation Model Variability Tropical Atlantic AMOC Geology Oceanography Paleontology Wan, Xiuquan Chang, Ping Schmidt, Matthew W Causes of Tropical Atlantic Paleo-Salinity Variation During Periods of Reduced AMOC |
topic_facet |
Sea surface temperature Thermohaline circulation Model Variability Tropical Atlantic AMOC Geology Oceanography Paleontology |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Wan, Xiuquan Chang, Ping Schmidt, Matthew W |
author_facet |
Wan, Xiuquan Chang, Ping Schmidt, Matthew W |
author_sort |
Wan, Xiuquan |
title |
Causes of Tropical Atlantic Paleo-Salinity Variation During Periods of Reduced AMOC |
title_short |
Causes of Tropical Atlantic Paleo-Salinity Variation During Periods of Reduced AMOC |
title_full |
Causes of Tropical Atlantic Paleo-Salinity Variation During Periods of Reduced AMOC |
title_fullStr |
Causes of Tropical Atlantic Paleo-Salinity Variation During Periods of Reduced AMOC |
title_full_unstemmed |
Causes of Tropical Atlantic Paleo-Salinity Variation During Periods of Reduced AMOC |
title_sort |
causes of tropical atlantic paleo-salinity variation during periods of reduced amoc |
publisher |
ODU Digital Commons |
publishDate |
2010 |
url |
https://digitalcommons.odu.edu/oeas_fac_pubs/213 https://doi.org/10.1029/2009gl042013 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1235/viewcontent/Wan_2010_Causes_of_tropical_Atlantic_paleo_sal.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
OES Faculty Publications |
op_relation |
https://digitalcommons.odu.edu/oeas_fac_pubs/213 doi:10.1029/2009gl042013 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1235/viewcontent/Wan_2010_Causes_of_tropical_Atlantic_paleo_sal.pdf |
op_doi |
https://doi.org/10.1029/2009gl042013 |
container_title |
Geophysical Research Letters |
container_volume |
37 |
container_issue |
4 |
_version_ |
1768392249469566976 |