Salinity change in the subtropical Atlantic : secular increase and teleconnections to the North Atlantic Oscillation
Author Posting. © American Geophysical Union, 2005. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 32 (2005): L02603, doi:10.1029/2004GL021499. Recent studies compa...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/3319 2023-05-15T17:30:37+02:00 Salinity change in the subtropical Atlantic : secular increase and teleconnections to the North Atlantic Oscillation Rosenheim, Brad E. Swart, Peter K. Thorrold, Simon R. Eisenhauer, Anton Willenz, Philippe 2005-01-21 text/plain application/pdf https://hdl.handle.net/1912/3319 en_US eng American Geophysical Union https://doi.org/10.1029/2004GL021499 Geophysical Research Letters 32 (2005): L02603 https://hdl.handle.net/1912/3319 doi:10.1029/2004GL021499 Geophysical Research Letters 32 (2005): L02603 doi:10.1029/2004GL021499 Article 2005 ftwhoas https://doi.org/10.1029/2004GL021499 2022-05-28T22:57:55Z Author Posting. © American Geophysical Union, 2005. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 32 (2005): L02603, doi:10.1029/2004GL021499. Recent studies comparing shipboard data between the 1950's and the 1990's have shown significant, heterogeneous adjustments of the temperature-salinity structure of the N. Atlantic Ocean. Here, we present proxy records of temperature and salinity from aragonite sclerosponge skeletons, extending existing records of the Salinity Maximum Waters (SMW) of the N. Atlantic back to 1890. These proxy records show secular temperature increases of 1.6–2.0°C, higher than published global averages, and salinity increases of 0.35–0.5 psu, smaller than short-term secular trends recently measured. Salinity reconstructions vary more significantly on the decadal scale, showing changes that are related to low-frequency variations of the North Atlantic Oscillation (NAO). On both secular and decadal time scales, the records indicate significant thermohaline changes in the SMW, either via forcing at the surface or increasing depths of density surfaces in the Bahamas. This project was supported by National Science Foundation grants 9819147 and 0136941 (to P.K.S) and 9876565 and 0134998 (to S.R.T). Article in Journal/Newspaper North Atlantic North Atlantic oscillation Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Geophysical Research Letters 32 2 |
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Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
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English |
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Author Posting. © American Geophysical Union, 2005. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 32 (2005): L02603, doi:10.1029/2004GL021499. Recent studies comparing shipboard data between the 1950's and the 1990's have shown significant, heterogeneous adjustments of the temperature-salinity structure of the N. Atlantic Ocean. Here, we present proxy records of temperature and salinity from aragonite sclerosponge skeletons, extending existing records of the Salinity Maximum Waters (SMW) of the N. Atlantic back to 1890. These proxy records show secular temperature increases of 1.6–2.0°C, higher than published global averages, and salinity increases of 0.35–0.5 psu, smaller than short-term secular trends recently measured. Salinity reconstructions vary more significantly on the decadal scale, showing changes that are related to low-frequency variations of the North Atlantic Oscillation (NAO). On both secular and decadal time scales, the records indicate significant thermohaline changes in the SMW, either via forcing at the surface or increasing depths of density surfaces in the Bahamas. This project was supported by National Science Foundation grants 9819147 and 0136941 (to P.K.S) and 9876565 and 0134998 (to S.R.T). |
format |
Article in Journal/Newspaper |
author |
Rosenheim, Brad E. Swart, Peter K. Thorrold, Simon R. Eisenhauer, Anton Willenz, Philippe |
spellingShingle |
Rosenheim, Brad E. Swart, Peter K. Thorrold, Simon R. Eisenhauer, Anton Willenz, Philippe Salinity change in the subtropical Atlantic : secular increase and teleconnections to the North Atlantic Oscillation |
author_facet |
Rosenheim, Brad E. Swart, Peter K. Thorrold, Simon R. Eisenhauer, Anton Willenz, Philippe |
author_sort |
Rosenheim, Brad E. |
title |
Salinity change in the subtropical Atlantic : secular increase and teleconnections to the North Atlantic Oscillation |
title_short |
Salinity change in the subtropical Atlantic : secular increase and teleconnections to the North Atlantic Oscillation |
title_full |
Salinity change in the subtropical Atlantic : secular increase and teleconnections to the North Atlantic Oscillation |
title_fullStr |
Salinity change in the subtropical Atlantic : secular increase and teleconnections to the North Atlantic Oscillation |
title_full_unstemmed |
Salinity change in the subtropical Atlantic : secular increase and teleconnections to the North Atlantic Oscillation |
title_sort |
salinity change in the subtropical atlantic : secular increase and teleconnections to the north atlantic oscillation |
publisher |
American Geophysical Union |
publishDate |
2005 |
url |
https://hdl.handle.net/1912/3319 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Geophysical Research Letters 32 (2005): L02603 doi:10.1029/2004GL021499 |
op_relation |
https://doi.org/10.1029/2004GL021499 Geophysical Research Letters 32 (2005): L02603 https://hdl.handle.net/1912/3319 doi:10.1029/2004GL021499 |
op_doi |
https://doi.org/10.1029/2004GL021499 |
container_title |
Geophysical Research Letters |
container_volume |
32 |
container_issue |
2 |
_version_ |
1766127472538025984 |