Variability of unusual distributions of alkenones in the surface waters of the Nordic seas
Samples of filtered particulate organic matter (POM) were obtained during the summers of 1999 and 2000 from the surface waters of the Nordic seas to monitor the spatial distribution of long-chain alkenones. The aim of the study was to appraise existing alkenone-based climatic proxies in northern hig...
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ftuabarcelonapb:oai:ddd.uab.cat:25436 2024-09-15T18:04:21+00:00 Variability of unusual distributions of alkenones in the surface waters of the Nordic seas Bendle, James Rosell Melé, Antoni Ziveri, Patrizia 2005 application/pdf https://ddd.uab.cat/record/25436 eng eng Paleoceanography Vol. 20, Issue 2 (June 2005), p.PA2001 https://ddd.uab.cat/record/25436 urn:10.1029/2004PA001025 urn:oai:ddd.uab.cat:25436 urn:recercauab:ARE-37969 urn:scopus_id:26244457174 urn:wos_id:000228381900001 urn:oai:egreta.uab.cat:publications/34d30ece-73e2-453d-84d6-423f0c9ad1fc open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ Alkenones Proxy calibration Nordic seas Plankton Coccolithophore Article 2005 ftuabarcelonapb 2024-09-04T06:59:19Z Samples of filtered particulate organic matter (POM) were obtained during the summers of 1999 and 2000 from the surface waters of the Nordic seas to monitor the spatial distribution of long-chain alkenones. The aim of the study was to appraise existing alkenone-based climatic proxies in northern high latitudes. Unusually high percentages of the tetraunsaturated alkenone were measured in the polar waters of the East Greenland Current, with C37:4 of up to 77% in 80% of sea-ice cover. Values of percent C37:4 across the Nordic seas showed a strong association with water mass type. Analysis of coccoliths in filters indicated that calcified Emiliania huxleyi could not be discounted as the biological precursor of alkenones in all the water masses. A combined data set of 69 samples of POM revealed a stronger correlation of percent C37:4 to sea surface salinity (SSS; R2 = 0.72) than to sea surface temperature (SST; R2 = 0.50). Values of percent C37:4 in sea surface POM were much higher than those in surficial sediments of the northern North Atlantic. To explain the discrepancy in sedimentary and surface water column percent C37:4, we propose that the alkenone contents in surface sediments underlying arctic and polar waters are a combination of autochthonous and allochthonous inputs of alkenones. Our results show that percent C37:4 can be used to reconstruct the relative extension of arctic/polar water masses in the North Atlantic. However, the results prevent confirmation of percent C37:4 as a paleo-SSS proxy in the Nordic seas, given its multivariate nature in our data set and the decoupling between its range of values in surface waters and sediments. Article in Journal/Newspaper East Greenland east greenland current Greenland Nordic Seas North Atlantic Sea ice Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB Paleoceanography 20 2 n/a n/a |
institution |
Open Polar |
collection |
Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
op_collection_id |
ftuabarcelonapb |
language |
English |
topic |
Alkenones Proxy calibration Nordic seas Plankton Coccolithophore |
spellingShingle |
Alkenones Proxy calibration Nordic seas Plankton Coccolithophore Bendle, James Rosell Melé, Antoni Ziveri, Patrizia Variability of unusual distributions of alkenones in the surface waters of the Nordic seas |
topic_facet |
Alkenones Proxy calibration Nordic seas Plankton Coccolithophore |
description |
Samples of filtered particulate organic matter (POM) were obtained during the summers of 1999 and 2000 from the surface waters of the Nordic seas to monitor the spatial distribution of long-chain alkenones. The aim of the study was to appraise existing alkenone-based climatic proxies in northern high latitudes. Unusually high percentages of the tetraunsaturated alkenone were measured in the polar waters of the East Greenland Current, with C37:4 of up to 77% in 80% of sea-ice cover. Values of percent C37:4 across the Nordic seas showed a strong association with water mass type. Analysis of coccoliths in filters indicated that calcified Emiliania huxleyi could not be discounted as the biological precursor of alkenones in all the water masses. A combined data set of 69 samples of POM revealed a stronger correlation of percent C37:4 to sea surface salinity (SSS; R2 = 0.72) than to sea surface temperature (SST; R2 = 0.50). Values of percent C37:4 in sea surface POM were much higher than those in surficial sediments of the northern North Atlantic. To explain the discrepancy in sedimentary and surface water column percent C37:4, we propose that the alkenone contents in surface sediments underlying arctic and polar waters are a combination of autochthonous and allochthonous inputs of alkenones. Our results show that percent C37:4 can be used to reconstruct the relative extension of arctic/polar water masses in the North Atlantic. However, the results prevent confirmation of percent C37:4 as a paleo-SSS proxy in the Nordic seas, given its multivariate nature in our data set and the decoupling between its range of values in surface waters and sediments. |
format |
Article in Journal/Newspaper |
author |
Bendle, James Rosell Melé, Antoni Ziveri, Patrizia |
author_facet |
Bendle, James Rosell Melé, Antoni Ziveri, Patrizia |
author_sort |
Bendle, James |
title |
Variability of unusual distributions of alkenones in the surface waters of the Nordic seas |
title_short |
Variability of unusual distributions of alkenones in the surface waters of the Nordic seas |
title_full |
Variability of unusual distributions of alkenones in the surface waters of the Nordic seas |
title_fullStr |
Variability of unusual distributions of alkenones in the surface waters of the Nordic seas |
title_full_unstemmed |
Variability of unusual distributions of alkenones in the surface waters of the Nordic seas |
title_sort |
variability of unusual distributions of alkenones in the surface waters of the nordic seas |
publishDate |
2005 |
url |
https://ddd.uab.cat/record/25436 |
genre |
East Greenland east greenland current Greenland Nordic Seas North Atlantic Sea ice |
genre_facet |
East Greenland east greenland current Greenland Nordic Seas North Atlantic Sea ice |
op_relation |
Paleoceanography Vol. 20, Issue 2 (June 2005), p.PA2001 https://ddd.uab.cat/record/25436 urn:10.1029/2004PA001025 urn:oai:ddd.uab.cat:25436 urn:recercauab:ARE-37969 urn:scopus_id:26244457174 urn:wos_id:000228381900001 urn:oai:egreta.uab.cat:publications/34d30ece-73e2-453d-84d6-423f0c9ad1fc |
op_rights |
open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ |
container_title |
Paleoceanography |
container_volume |
20 |
container_issue |
2 |
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n/a |
op_container_end_page |
n/a |
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1810441845732278272 |