Observations of supercooling and frazil ice formation in the Laptev Sea coastal polynya
Identifieur interne : 000C18 ( Main/Exploration ); précédent : 000C17; suivant : 000C19Observations of supercooling and frazil ice formation in the Laptev Sea coastal polynya
Auteurs : Igor A. Dmitrenko [Allemagne] ; Carolyn Wegner [Allemagne] ; Heidemarie Kassens [Allemagne] ; Sergey A. Kirillov [Russie] ; Thomas Krumpen [Allemagne] ; Günther Heinemann [Allemagne] ; Alfred Helbig [Allemagne] ; David Schröder [Allemagne] ; Jens A. Hölemann [Allemagne] ; Torben Klagge [Allemagne] ; Konstantin P. Tyshko [Russie] ; Thomas Busche [Allemagne]Source :
- Journal of Geophysical Research: Oceans [ 0148-0227 ] ; 2010-05.
Descripteurs français
- Pascal (Inist)
- Action vent, Congélation, Couche mélangée, Courantométrie, Eau mer, Ecoulement géostrophique, Frasil, Glace fixée, Gradient salinité, Imagerie, Instrumentation, Mer de Laptev, Modèle, Observation par satellite, Photographie aérienne, Polynie, Profondeur, Radar ouverture synthétique, Salinité, Satellite, Surfusion, Température, Télédétection spatiale.
- Wicri :
- topic : Congélation, Satellite.
English descriptors
- KwdEn :
- Current measurement, Fixed ice, Frazil ice, Geostrophic flow, Laptev Sea, Mixed layer, Polynya, Salinity gradient, Satellite observation, Space remote sensing, Supercooling, Synthetic aperture radar, Wind effect, aerial photography, depth, freezing, imagery, instruments, models, salinity, satellites, sea water, temperature.
Abstract
This paper examines a hydrographic response to the wind‐driven coastal polynya activity over the southeastern Laptev Sea shelf for April–May 2008, using a combination of Environmental Satellite (Envisat) advanced synthetic aperture radar (ASAR) and TerraSAR‐X satellite imagery, aerial photography, meteorological data, and SBE‐37 salinity‐temperature‐depth and acoustic Doppler current profiler land‐fast ice edge‐moored instruments. When ASAR observed the strongest end‐of‐April polynya event with frazil ice formation, the moored instruments showed maximal acoustical scattering within the surface mixed layer, and the seawater temperatures were either at or 0.02°C below freezing. We also find evidence of the persistent horizontal temperature and salinity gradients across the fast ice edge to have the signature of geostrophic flow adjustment as predicted by polynya models.
Url:
DOI: 10.1029/2009JC005798
Affiliations:
- Allemagne, Russie
- Rhénanie-Palatinat, Schleswig-Holstein
- 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="2010-05">2010-05</date><biblScope unit="volume">115</biblScope><biblScope unit="issue">C5</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">0FECA3C16BDFC799B30436D0ADF9DD11B4C7B5EC</idno><idno type="DOI">10.1029/2009JC005798</idno><idno type="ArticleID">2009JC005798</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0148-0227</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Current measurement</term><term>Fixed ice</term><term>Frazil ice</term><term>Geostrophic flow</term><term>Laptev Sea</term><term>Mixed layer</term><term>Polynya</term><term>Salinity gradient</term><term>Satellite observation</term><term>Space remote sensing</term><term>Supercooling</term><term>Synthetic aperture radar</term><term>Wind effect</term><term>aerial photography</term><term>depth</term><term>freezing</term><term>imagery</term><term>instruments</term><term>models</term><term>salinity</term><term>satellites</term><term>sea water</term><term>temperature</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Action vent</term><term>Congélation</term><term>Couche mélangée</term><term>Courantométrie</term><term>Eau mer</term><term>Ecoulement géostrophique</term><term>Frasil</term><term>Glace fixée</term><term>Gradient salinité</term><term>Imagerie</term><term>Instrumentation</term><term>Mer de Laptev</term><term>Modèle</term><term>Observation par satellite</term><term>Photographie aérienne</term><term>Polynie</term><term>Profondeur</term><term>Radar ouverture synthétique</term><term>Salinité</term><term>Satellite</term><term>Surfusion</term><term>Température</term><term>Télédétection spatiale</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Congélation</term><term>Satellite</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">This paper examines a hydrographic response to the wind‐driven coastal polynya activity over the southeastern Laptev Sea shelf for April–May 2008, using a combination of Environmental Satellite (Envisat) advanced synthetic aperture radar (ASAR) and TerraSAR‐X satellite imagery, aerial photography, meteorological data, and SBE‐37 salinity‐temperature‐depth and acoustic Doppler current profiler land‐fast ice edge‐moored instruments. When ASAR observed the strongest end‐of‐April polynya event with frazil ice formation, the moored instruments showed maximal acoustical scattering within the surface mixed layer, and the seawater temperatures were either at or 0.02°C below freezing. We also find evidence of the persistent horizontal temperature and salinity gradients across the fast ice edge to have the signature of geostrophic flow adjustment as predicted by polynya models.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Russie</li></country><region><li>Rhénanie-Palatinat</li><li>Schleswig-Holstein</li></region><settlement><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="Dmitrenko, Igor A" sort="Dmitrenko, Igor A" uniqKey="Dmitrenko I" first="Igor A." last="Dmitrenko">Igor A. 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Hölemann</name><name sortKey="Kassens, Heidemarie" sort="Kassens, Heidemarie" uniqKey="Kassens H" first="Heidemarie" last="Kassens">Heidemarie Kassens</name><name sortKey="Klagge, Torben" sort="Klagge, Torben" uniqKey="Klagge T" first="Torben" last="Klagge">Torben Klagge</name><name sortKey="Krumpen, Thomas" sort="Krumpen, Thomas" uniqKey="Krumpen T" first="Thomas" last="Krumpen">Thomas Krumpen</name><name sortKey="Schroder, David" sort="Schroder, David" uniqKey="Schroder D" first="David" last="Schröder">David Schröder</name><name sortKey="Wegner, Carolyn" sort="Wegner, Carolyn" uniqKey="Wegner C" first="Carolyn" last="Wegner">Carolyn Wegner</name></country><country name="Russie"><noRegion><name sortKey="Kirillov, Sergey A" sort="Kirillov, Sergey A" uniqKey="Kirillov S" first="Sergey A." last="Kirillov">Sergey A. Kirillov</name></noRegion><name sortKey="Tyshko, Konstantin P" sort="Tyshko, Konstantin P" uniqKey="Tyshko K" first="Konstantin P." last="Tyshko">Konstantin P. 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