Changes in distribution of brine waters on the Laptev Sea shelf in 2007
Identifieur interne : 000C58 ( Main/Exploration ); précédent : 000C57; suivant : 000C59Changes in distribution of brine waters on the Laptev Sea shelf in 2007
Auteurs : D. Bauch [Allemagne] ; J. Hölemann [Allemagne] ; S. Willmes [Allemagne] ; M. Gröger [Allemagne] ; A. Novikhin [Russie] ; A. Nikulina [Allemagne] ; H. Kassens [Allemagne] ; L. Timokhov [Russie]Source :
- Journal of Geophysical Research: Oceans [ 0148-0227 ] ; 2010-11.
Descripteurs français
- Pascal (Inist)
- Advection, Bilan masse, Couche superficielle, Eau fond, Eau rivière, Eau saumâtre, Eté, Exportation, Glace marine, Halocline, Hiver, Masse eau, Mer de Laptev, Mixage, Mélangeage, Océan Arctique, Plateforme continentale externe, Plateforme continentale interne, Salinité, Saumure, Valeur extrême, Zone polaire.
- Wicri :
- topic : Exportation, Océan Arctique.
English descriptors
- KwdEn :
Abstract
Combined salinity and δ18O data from summer 2007 reveal a significant change in brine production in the Laptev Sea relative to summer 1994. The distribution of river water and brine‐enriched waters on the Laptev Sea shelf is derived based on mass balance calculations using salinity and δ18O data. While in 1994 maximal influence of brines is seen within bottom waters, in 2007 the influence of brines is highest within the surface layer and only a moderate influence of brines is observed in the bottom layer. In contrast to 2007, salinity and δ18O data from summer 1994 clearly identify a locally formed brine‐enriched bottom water mass as mixing end‐member between surface layer and inner shelf waters on one side and with higher salinity water from the outer Laptev Sea on the other side. In 2007, the brine‐enriched waters are predominantly part of the surface regime, and the mixing end‐member between surface layer and outer shelf waters is replaced by a relatively salty bottom water mass. This relatively salty bottom water probably originates from the western Laptev Sea. The inverted distribution of brines in the water column in 2007 relative to 1994 suggests a less effective winter sea ice formation in winter 2006–2007 combined with advection of more saline waters from the western Laptev Sea or the outer shelf precedent to the climatically extreme summer 2007. The observed changes result in an altered export of waters from the Laptev Sea to the Arctic Ocean halocline.
Url:
DOI: 10.1029/2010JC006249
Affiliations:
- Allemagne, Russie
- Hambourg, Rhénanie-Palatinat, Schleswig-Holstein
- Hambourg, Kiel, Trèves (Allemagne)
- Université de Trèves
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Le document en format XML
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Res.</title><idno type="ISSN">0148-0227</idno><idno type="eISSN">2156-2202</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2010-11">2010-11</date><biblScope unit="volume">115</biblScope><biblScope unit="issue">C11</biblScope><biblScope unit="page" from="/">n/a</biblScope><biblScope unit="page" to="/">n/a</biblScope></imprint><idno type="ISSN">0148-0227</idno></series><idno type="istex">1182701C3E2983A3EA35A57B148B9312EE9B5094</idno><idno type="DOI">10.1029/2010JC006249</idno><idno type="ArticleID">2010JC006249</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0148-0227</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Arctic Ocean</term><term>Halocline</term><term>Laptev Sea</term><term>Mixing</term><term>Polar region</term><term>River water</term><term>Summer</term><term>Surface layer</term><term>Water mass</term><term>Winter</term><term>advection</term><term>bottom water</term><term>brackish water</term><term>brines</term><term>export</term><term>extreme value</term><term>inner shelf</term><term>mass balance</term><term>mixing</term><term>outer shelf</term><term>salinity</term><term>sea ice</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Advection</term><term>Bilan masse</term><term>Couche superficielle</term><term>Eau fond</term><term>Eau rivière</term><term>Eau saumâtre</term><term>Eté</term><term>Exportation</term><term>Glace marine</term><term>Halocline</term><term>Hiver</term><term>Masse eau</term><term>Mer de Laptev</term><term>Mixage</term><term>Mélangeage</term><term>Océan Arctique</term><term>Plateforme continentale externe</term><term>Plateforme continentale interne</term><term>Salinité</term><term>Saumure</term><term>Valeur extrême</term><term>Zone polaire</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Exportation</term><term>Océan Arctique</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Combined salinity and δ18O data from summer 2007 reveal a significant change in brine production in the Laptev Sea relative to summer 1994. The distribution of river water and brine‐enriched waters on the Laptev Sea shelf is derived based on mass balance calculations using salinity and δ18O data. While in 1994 maximal influence of brines is seen within bottom waters, in 2007 the influence of brines is highest within the surface layer and only a moderate influence of brines is observed in the bottom layer. In contrast to 2007, salinity and δ18O data from summer 1994 clearly identify a locally formed brine‐enriched bottom water mass as mixing end‐member between surface layer and inner shelf waters on one side and with higher salinity water from the outer Laptev Sea on the other side. In 2007, the brine‐enriched waters are predominantly part of the surface regime, and the mixing end‐member between surface layer and outer shelf waters is replaced by a relatively salty bottom water mass. This relatively salty bottom water probably originates from the western Laptev Sea. The inverted distribution of brines in the water column in 2007 relative to 1994 suggests a less effective winter sea ice formation in winter 2006–2007 combined with advection of more saline waters from the western Laptev Sea or the outer shelf precedent to the climatically extreme summer 2007. The observed changes result in an altered export of waters from the Laptev Sea to the Arctic Ocean halocline.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Russie</li></country><region><li>Hambourg</li><li>Rhénanie-Palatinat</li><li>Schleswig-Holstein</li></region><settlement><li>Hambourg</li><li>Kiel</li><li>Trèves (Allemagne)</li></settlement><orgName><li>Université de Trèves</li></orgName></list><tree><country name="Allemagne"><region name="Schleswig-Holstein"><name sortKey="Bauch, D" sort="Bauch, D" uniqKey="Bauch D" first="D." last="Bauch">D. Bauch</name></region><name sortKey="Bauch, D" sort="Bauch, D" uniqKey="Bauch D" first="D." last="Bauch">D. Bauch</name><name sortKey="Groger, M" sort="Groger, M" uniqKey="Groger M" first="M." last="Gröger">M. Gröger</name><name sortKey="Holemann, J" sort="Holemann, J" uniqKey="Holemann J" first="J." last="Hölemann">J. Hölemann</name><name sortKey="Kassens, H" sort="Kassens, H" uniqKey="Kassens H" first="H." last="Kassens">H. Kassens</name><name sortKey="Nikulina, A" sort="Nikulina, A" uniqKey="Nikulina A" first="A." last="Nikulina">A. Nikulina</name><name sortKey="Willmes, S" sort="Willmes, S" uniqKey="Willmes S" first="S." last="Willmes">S. Willmes</name></country><country name="Russie"><noRegion><name sortKey="Novikhin, A" sort="Novikhin, A" uniqKey="Novikhin A" first="A." last="Novikhin">A. Novikhin</name></noRegion><name sortKey="Timokhov, L" sort="Timokhov, L" uniqKey="Timokhov L" first="L." last="Timokhov">L. Timokhov</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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