Distributions of U₃₇ᵏ and U₃₇ᵏ' in the surface waters and sediments of the Nordic Seas
In this paper we revise the application of the U₃₇ᵏ' and U₃₇ᵏ indices as sea surface temperature (SST) proxies in the Nordic Seas. In the summer of 1999 and 2000 we obtained samples of filtered particulate organic matter (POM) from surface waters (∼6 m depth) of the Nordic Seas. A number of sam...
| Autores: | , |
|---|---|
| Formato: | artículo |
| Fecha de publicación: | 2004 |
| País: | España |
| Recursos: | Universitat Autònoma de Barcelona |
| Repositorio: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglés |
| OAI Identifier: | oai:ddd.uab.cat:158090 |
| Acesso em linha: | https://ddd.uab.cat/record/158090 https://dx.doi.org/urn:doi:10.1029/2004GC000741 |
| Access Level: | acceso abierto |
| Palavra-chave: | Alkenones Paleotemperature Calibration Nordic Seas |
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Distributions of U₃₇ᵏ and U₃₇ᵏ' in the surface waters and sediments of the Nordic Seasimplications for paleoceanographyBendle, James|||0000-0002-6826-8658Rosell Melé, Antoni|||0000-0002-5513-2647AlkenonesPaleotemperatureCalibrationNordic SeasIn this paper we revise the application of the U₃₇ᵏ' and U₃₇ᵏ indices as sea surface temperature (SST) proxies in the Nordic Seas. In the summer of 1999 and 2000 we obtained samples of filtered particulate organic matter (POM) from surface waters (∼6 m depth) of the Nordic Seas. A number of samples were collected from polar waters with up to 80% of sea ice cover. Alkenones were detected in all of the major water masses of the Nordic seas, across a spectrum of SST values from -0.5 to 13°C and SSS values from 29.6 to 35.6 (psu). Concentrations of alkenones were similar in magnitude to those reported previously for the North Atlantic and the Southern Ocean. Values of U₃₇ᵏ' from the new Nordic Seas POM data show no correlation with SST below 8°C. In contrast, below this temperature a linear correlation exists between U₃₇ᵏ and regional SST, supporting previous suggestions that, overall, U₃₇ᵏ may be a more appropriate SST index for the region. It must be noted however that U₃₇ᵏ is calculated using the tetraunsaturated alkenone, and the dominant control on this compound is not yet fully understood. The new data highlight major differences between distributions of U₃₇ᵏ and U₃₇ᵏ' in the water column POM and surficial sediments of the Nordic Seas. We also examine the geographical dependence of the U₃₇ᵏ' versus SST relationship in the region's surficial sediments. Some areas are associated with unreliable SST estimates, whereas in others the U₃₇ᵏ' versus SST relationship falls within the range of a global core top calibration. It is suggested that the breakdown of the U₃₇ᵏ'-SST relationship in some regions is due to ecological and sedimentological factors. The latter relates to the extension of the habitats of alkenone producers in polar waters. The former to the resuspension of sediments and laterally transported alkenone inputs. This suggests that accurate alkenone derived SST estimates in the Nordic seas are geographically constrained. 22004-01-0120042004-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/158090https://dx.doi.org/urn:doi:10.1029/2004GC000741reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengopen accesshttp://purl.org/coar/access_right/c_abf2Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.https://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:1580902026-06-06T12:50:31Z |
| dc.title.none.fl_str_mv |
Distributions of U₃₇ᵏ and U₃₇ᵏ' in the surface waters and sediments of the Nordic Seas implications for paleoceanography |
| title |
Distributions of U₃₇ᵏ and U₃₇ᵏ' in the surface waters and sediments of the Nordic Seas |
| spellingShingle |
Distributions of U₃₇ᵏ and U₃₇ᵏ' in the surface waters and sediments of the Nordic Seas Bendle, James|||0000-0002-6826-8658 Alkenones Paleotemperature Calibration Nordic Seas |
| title_short |
Distributions of U₃₇ᵏ and U₃₇ᵏ' in the surface waters and sediments of the Nordic Seas |
| title_full |
Distributions of U₃₇ᵏ and U₃₇ᵏ' in the surface waters and sediments of the Nordic Seas |
| title_fullStr |
Distributions of U₃₇ᵏ and U₃₇ᵏ' in the surface waters and sediments of the Nordic Seas |
| title_full_unstemmed |
Distributions of U₃₇ᵏ and U₃₇ᵏ' in the surface waters and sediments of the Nordic Seas |
| title_sort |
Distributions of U₃₇ᵏ and U₃₇ᵏ' in the surface waters and sediments of the Nordic Seas |
| dc.creator.none.fl_str_mv |
Bendle, James|||0000-0002-6826-8658 Rosell Melé, Antoni|||0000-0002-5513-2647 |
| author |
Bendle, James|||0000-0002-6826-8658 |
| author_facet |
Bendle, James|||0000-0002-6826-8658 Rosell Melé, Antoni|||0000-0002-5513-2647 |
| author_role |
author |
| author2 |
Rosell Melé, Antoni|||0000-0002-5513-2647 |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
Alkenones Paleotemperature Calibration Nordic Seas |
| topic |
Alkenones Paleotemperature Calibration Nordic Seas |
| description |
In this paper we revise the application of the U₃₇ᵏ' and U₃₇ᵏ indices as sea surface temperature (SST) proxies in the Nordic Seas. In the summer of 1999 and 2000 we obtained samples of filtered particulate organic matter (POM) from surface waters (∼6 m depth) of the Nordic Seas. A number of samples were collected from polar waters with up to 80% of sea ice cover. Alkenones were detected in all of the major water masses of the Nordic seas, across a spectrum of SST values from -0.5 to 13°C and SSS values from 29.6 to 35.6 (psu). Concentrations of alkenones were similar in magnitude to those reported previously for the North Atlantic and the Southern Ocean. Values of U₃₇ᵏ' from the new Nordic Seas POM data show no correlation with SST below 8°C. In contrast, below this temperature a linear correlation exists between U₃₇ᵏ and regional SST, supporting previous suggestions that, overall, U₃₇ᵏ may be a more appropriate SST index for the region. It must be noted however that U₃₇ᵏ is calculated using the tetraunsaturated alkenone, and the dominant control on this compound is not yet fully understood. The new data highlight major differences between distributions of U₃₇ᵏ and U₃₇ᵏ' in the water column POM and surficial sediments of the Nordic Seas. We also examine the geographical dependence of the U₃₇ᵏ' versus SST relationship in the region's surficial sediments. Some areas are associated with unreliable SST estimates, whereas in others the U₃₇ᵏ' versus SST relationship falls within the range of a global core top calibration. It is suggested that the breakdown of the U₃₇ᵏ'-SST relationship in some regions is due to ecological and sedimentological factors. The latter relates to the extension of the habitats of alkenone producers in polar waters. The former to the resuspension of sediments and laterally transported alkenone inputs. This suggests that accurate alkenone derived SST estimates in the Nordic seas are geographically constrained. |
| publishDate |
2004 |
| dc.date.none.fl_str_mv |
2 2004-01-01 2004 2004-01-01 |
| dc.type.none.fl_str_mv |
Article http://purl.org/coar/resource_type/c_6501 VoR http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| dc.type.openaire.fl_str_mv |
info:eu-repo/semantics/article |
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article |
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https://ddd.uab.cat/record/158090 https://dx.doi.org/urn:doi:10.1029/2004GC000741 |
| url |
https://ddd.uab.cat/record/158090 https://dx.doi.org/urn:doi:10.1029/2004GC000741 |
| dc.language.none.fl_str_mv |
Inglés eng |
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Inglés |
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eng |
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open access http://purl.org/coar/access_right/c_abf2 https://rightsstatements.org/vocab/InC/1.0/ |
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info:eu-repo/semantics/openAccess |
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open access http://purl.org/coar/access_right/c_abf2 https://rightsstatements.org/vocab/InC/1.0/ |
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