A High-Resolution Coral-Based Δ14C Record of Surface Water Processes in the Western Mediterranean Sea
The first high-resolution time series of pre- and post-bomb radiocarbon measurements is reported for surface waters in the western Mediterranean Sea. The Δ14C record was obtained from the aragonite skeleton of Cladocora caespitosa using a 50-yr-old corallite collected in the Ligurian Sea in 1998. La...
Main Authors: | , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Radiocarbon
2013
|
Subjects: | |
Online Access: | https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/16397 |
id |
ftunivarizonaojs:oai:journals.uair.arizona.edu:article/16397 |
---|---|
record_format |
openpolar |
spelling |
ftunivarizonaojs:oai:journals.uair.arizona.edu:article/16397 2023-05-15T17:30:39+02:00 A High-Resolution Coral-Based Δ14C Record of Surface Water Processes in the Western Mediterranean Sea Tisnérat-Laborde, Nadine Montagna, Paolo McCulloch, Malcolm Siani, Giuseppe Silenzi, Sergio Frank, Norbert 2013-05-09 application/pdf https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/16397 eng eng Radiocarbon https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/16397/pdf https://journals.uair.arizona.edu/index.php/radiocarbon/article/downloadSuppFile/16397/210 https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/16397 Radiocarbon; Vol 55, No 2–3 (2013); 1617-1630 0033-8222 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2013 ftunivarizonaojs 2020-11-14T17:53:01Z The first high-resolution time series of pre- and post-bomb radiocarbon measurements is reported for surface waters in the western Mediterranean Sea. The Δ14C record was obtained from the aragonite skeleton of Cladocora caespitosa using a 50-yr-old corallite collected in the Ligurian Sea in 1998. Laser-ablation ICP measurements of trace elements (Li/Mg and Sr/Ca) show a strong seasonal variability, enabling the chronology of the Δ14C record to be determined at annual timescales. The mean Δ14C of pre-bomb surface water is –56 ± 3‰, corresponding to a reservoir age of 262 ± 29 yr. The post-bomb maximum occurs in 1972 with a Δ14C value of 90‰, significantly lower than the peak of 150‰ observed in the North Atlantic. The dilution of the peak-amplitude of Δ14C in western Mediterranean surface waters is attributed to mixing of North Atlantic Central Water inflow with relatively depleted underlying Intermediate Mediterranean and Levantine Intermediate waters. Intensification of this mixing is observed in 1963–1964, consistent with the change in atmospheric circulation from a positive to negative NAO phase (1960–1967). The post-peak Δ14C variability is relatively limited, reflecting mainly local vertical mixing forced by wind stress.DOI:10.2458/azu_js_rc.55.16397 Article in Journal/Newspaper North Atlantic Journals at the University of Arizona |
institution |
Open Polar |
collection |
Journals at the University of Arizona |
op_collection_id |
ftunivarizonaojs |
language |
English |
description |
The first high-resolution time series of pre- and post-bomb radiocarbon measurements is reported for surface waters in the western Mediterranean Sea. The Δ14C record was obtained from the aragonite skeleton of Cladocora caespitosa using a 50-yr-old corallite collected in the Ligurian Sea in 1998. Laser-ablation ICP measurements of trace elements (Li/Mg and Sr/Ca) show a strong seasonal variability, enabling the chronology of the Δ14C record to be determined at annual timescales. The mean Δ14C of pre-bomb surface water is –56 ± 3‰, corresponding to a reservoir age of 262 ± 29 yr. The post-bomb maximum occurs in 1972 with a Δ14C value of 90‰, significantly lower than the peak of 150‰ observed in the North Atlantic. The dilution of the peak-amplitude of Δ14C in western Mediterranean surface waters is attributed to mixing of North Atlantic Central Water inflow with relatively depleted underlying Intermediate Mediterranean and Levantine Intermediate waters. Intensification of this mixing is observed in 1963–1964, consistent with the change in atmospheric circulation from a positive to negative NAO phase (1960–1967). The post-peak Δ14C variability is relatively limited, reflecting mainly local vertical mixing forced by wind stress.DOI:10.2458/azu_js_rc.55.16397 |
format |
Article in Journal/Newspaper |
author |
Tisnérat-Laborde, Nadine Montagna, Paolo McCulloch, Malcolm Siani, Giuseppe Silenzi, Sergio Frank, Norbert |
spellingShingle |
Tisnérat-Laborde, Nadine Montagna, Paolo McCulloch, Malcolm Siani, Giuseppe Silenzi, Sergio Frank, Norbert A High-Resolution Coral-Based Δ14C Record of Surface Water Processes in the Western Mediterranean Sea |
author_facet |
Tisnérat-Laborde, Nadine Montagna, Paolo McCulloch, Malcolm Siani, Giuseppe Silenzi, Sergio Frank, Norbert |
author_sort |
Tisnérat-Laborde, Nadine |
title |
A High-Resolution Coral-Based Δ14C Record of Surface Water Processes in the Western Mediterranean Sea |
title_short |
A High-Resolution Coral-Based Δ14C Record of Surface Water Processes in the Western Mediterranean Sea |
title_full |
A High-Resolution Coral-Based Δ14C Record of Surface Water Processes in the Western Mediterranean Sea |
title_fullStr |
A High-Resolution Coral-Based Δ14C Record of Surface Water Processes in the Western Mediterranean Sea |
title_full_unstemmed |
A High-Resolution Coral-Based Δ14C Record of Surface Water Processes in the Western Mediterranean Sea |
title_sort |
high-resolution coral-based δ14c record of surface water processes in the western mediterranean sea |
publisher |
Radiocarbon |
publishDate |
2013 |
url |
https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/16397 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Radiocarbon; Vol 55, No 2–3 (2013); 1617-1630 0033-8222 |
op_relation |
https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/16397/pdf https://journals.uair.arizona.edu/index.php/radiocarbon/article/downloadSuppFile/16397/210 https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/16397 |
_version_ |
1766127520260816896 |