The Arctic shelf regions as a source of freshwater and brine-enriched waters as revealed from stable oxygen isotopes
The water masses of the Arctic Ocean shelf regions are significantly influenced by river water and sea-ice processes. Since river water is highly depleted in ∂18O relative to marine waters as well as to sea-ice, the ∂18O composition and salinity of a water sample can be used to separate the differen...
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Deutsche Gesellschaft für Polarforschung
2011
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ftoceanrep:oai:oceanrep.geomar.de:13044 2023-05-15T14:26:24+02:00 The Arctic shelf regions as a source of freshwater and brine-enriched waters as revealed from stable oxygen isotopes Bauch, Dorothea Hölemann, Jens Andersen, Nils Dobrotina, Elena Nikulina, Anna Kassens, Heidemarie 2011 text https://oceanrep.geomar.de/id/eprint/13044/ https://oceanrep.geomar.de/id/eprint/13044/1/2011_Bauch_etal_Polarforschung.pdf en eng Deutsche Gesellschaft für Polarforschung Alfred-Wegener-Institut für Polar- und Meeresforschung https://oceanrep.geomar.de/id/eprint/13044/1/2011_Bauch_etal_Polarforschung.pdf Bauch, D. , Hölemann, J., Andersen, N., Dobrotina, E., Nikulina, A. and Kassens, H. (2011) The Arctic shelf regions as a source of freshwater and brine-enriched waters as revealed from stable oxygen isotopes. Open Access Polarforschung, 80 (3). pp. 127-140. DOI hdl:10013/epic.38389.d001. hdl:10013/epic.38389.d001 info:eu-repo/semantics/openAccess Article PeerReviewed 2011 ftoceanrep 2023-04-07T15:01:47Z The water masses of the Arctic Ocean shelf regions are significantly influenced by river water and sea-ice processes. Since river water is highly depleted in ∂18O relative to marine waters as well as to sea-ice, the ∂18O composition and salinity of a water sample can be used to separate the different freshwater water sources. In this paper the distributions of river water, sea-ice melt water or sea-ice formation are discussed for the Kara, Laptev and Beaufort shelves based on ∂18O and salinity data. Depending on the average depth the observed fields of salinity and ∂18O values are different for each region. But comparing the overall ∂18O and salinity correlations reveals a remarkable similarity for these three Arctic shelf regions as similar local bottom-water masses are formed by sea-ice processes. Remnants of these seaice derived bottom water masses are found on all shelves during summer at a salinity of about 30. Investigations at the shelf break of the Kara Sea and Laptev Sea show that river water as well as brine waters are exported to the Arctic Ocean halocline. This export shows inter-annual variability in correlation with wind forcing during summer. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Kara Sea Kara-Laptev laptev Laptev Sea Polarforschung Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Kara Sea Laptev Sea |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The water masses of the Arctic Ocean shelf regions are significantly influenced by river water and sea-ice processes. Since river water is highly depleted in ∂18O relative to marine waters as well as to sea-ice, the ∂18O composition and salinity of a water sample can be used to separate the different freshwater water sources. In this paper the distributions of river water, sea-ice melt water or sea-ice formation are discussed for the Kara, Laptev and Beaufort shelves based on ∂18O and salinity data. Depending on the average depth the observed fields of salinity and ∂18O values are different for each region. But comparing the overall ∂18O and salinity correlations reveals a remarkable similarity for these three Arctic shelf regions as similar local bottom-water masses are formed by sea-ice processes. Remnants of these seaice derived bottom water masses are found on all shelves during summer at a salinity of about 30. Investigations at the shelf break of the Kara Sea and Laptev Sea show that river water as well as brine waters are exported to the Arctic Ocean halocline. This export shows inter-annual variability in correlation with wind forcing during summer. |
format |
Article in Journal/Newspaper |
author |
Bauch, Dorothea Hölemann, Jens Andersen, Nils Dobrotina, Elena Nikulina, Anna Kassens, Heidemarie |
spellingShingle |
Bauch, Dorothea Hölemann, Jens Andersen, Nils Dobrotina, Elena Nikulina, Anna Kassens, Heidemarie The Arctic shelf regions as a source of freshwater and brine-enriched waters as revealed from stable oxygen isotopes |
author_facet |
Bauch, Dorothea Hölemann, Jens Andersen, Nils Dobrotina, Elena Nikulina, Anna Kassens, Heidemarie |
author_sort |
Bauch, Dorothea |
title |
The Arctic shelf regions as a source of freshwater and brine-enriched waters as revealed from stable oxygen isotopes |
title_short |
The Arctic shelf regions as a source of freshwater and brine-enriched waters as revealed from stable oxygen isotopes |
title_full |
The Arctic shelf regions as a source of freshwater and brine-enriched waters as revealed from stable oxygen isotopes |
title_fullStr |
The Arctic shelf regions as a source of freshwater and brine-enriched waters as revealed from stable oxygen isotopes |
title_full_unstemmed |
The Arctic shelf regions as a source of freshwater and brine-enriched waters as revealed from stable oxygen isotopes |
title_sort |
arctic shelf regions as a source of freshwater and brine-enriched waters as revealed from stable oxygen isotopes |
publisher |
Deutsche Gesellschaft für Polarforschung |
publishDate |
2011 |
url |
https://oceanrep.geomar.de/id/eprint/13044/ https://oceanrep.geomar.de/id/eprint/13044/1/2011_Bauch_etal_Polarforschung.pdf |
geographic |
Arctic Arctic Ocean Kara Sea Laptev Sea |
geographic_facet |
Arctic Arctic Ocean Kara Sea Laptev Sea |
genre |
Arctic Arctic Arctic Ocean Kara Sea Kara-Laptev laptev Laptev Sea Polarforschung Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Kara Sea Kara-Laptev laptev Laptev Sea Polarforschung Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/13044/1/2011_Bauch_etal_Polarforschung.pdf Bauch, D. , Hölemann, J., Andersen, N., Dobrotina, E., Nikulina, A. and Kassens, H. (2011) The Arctic shelf regions as a source of freshwater and brine-enriched waters as revealed from stable oxygen isotopes. Open Access Polarforschung, 80 (3). pp. 127-140. DOI hdl:10013/epic.38389.d001. hdl:10013/epic.38389.d001 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766298966348005376 |