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Dans l'ensemble, nos r\\u00e9sultats renforcent l'id\\u00e9e selon laquelle le cycle aqueux du DMS dans l'Arctique est \\u00e9troitement li\\u00e9 \\u00e0 la dynamique de la glace de mer et aux r\\u00e9ponses physiologiques \\u00e0 la lumi\\u00e8re. 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Using a novel automated instrument (ACT-MIMS) more than 2500 DMS observations were collected at high frequency alongside ancillary measurements of salinity, temperature, fluorescence (chlorophyll a proxy), solar radiation, ice concentration and the algal precursor of DMS, dimethylsulfoniopropionate. DMS concentrations ranged from ca. 1 to 32 nmol L-1 (average of 6 nmol L-1) in 2017 over an area covering a wide range of contrasting marine environments from coastal to open ocean, ice-free waters, as well as under-ice waters. Surface water DMS hotspots were measured in association with thermohaline oceanographic features in high productivity coastal waters, as well as with the presence of ponded first-year ice (FYI). Nighttime increases and daytime decreases of DMS concentrations were also observed in productive areas of the Labrador Sea and Davis Strait continental shelf. The association of DMS concentrations with diurnal solar radiation variation suggests the involvement of photobiological processes. Overall, our results strengthen the view that aqueous DMS cycling in the Arctic is intimately linked with sea ice dynamics and physiological responses to light. As such, future changes in the seasonality of the Arctic cryosphere will likely play an important role in shaping DMS emissions, although the sign and magnitude of the change remain highly uncertain.","fr":"Cette étude présente les concentrations de diméthylsulfure (DMS) à la surface de la mer, mesurées dans la mer du Labrador et dans l'archipel arctique canadien au cours de l'été 2017 (juillet-août). À l'aide d'un nouvel instrument automatisé (ACT-MIMS), plus de 2 500 observations DMS ont été recueillies à haute fréquence, ainsi que des mesures auxiliaires de la salinité, de la température, de la fluorescence (la chlorophylle est un indicateur), du rayonnement solaire, de la concentration de glace et du précurseur algal du DMS, le diméthylsulfoniopropionate. Les concentrations de DMS variaient d'environ 1 à 32 nmol L-1 (moyenne de 6 nmol L-1) en 2017 sur une zone couvrant un large éventail d'environnements marins contrastés, allant de la côte à la haute mer, des eaux libres de glace et des eaux sous-glacées. Les points chauds DMS des eaux de surface ont été mesurés en association avec les caractéristiques océanographiques thermohalines des eaux côtières à haute productivité, ainsi qu'avec la présence d'étangs de glace de première année (FYI). Des augmentations nocturnes et des baisses diurnes des concentrations de DMS ont également été observées dans les zones productives de la mer du Labrador et du plateau continental du détroit de Davis. L'association des concentrations de DMS à la variation du rayonnement solaire diurne suggère l'implication de processus photobiologiques. Dans l'ensemble, nos résultats renforcent l'idée selon laquelle le cycle aqueux du DMS dans l'Arctique est étroitement lié à la dynamique de la glace de mer et aux réponses physiologiques à la lumière. 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        </cit:onlineResource>\n            </cit:CI_Contact>\n          </cit:contactInfo>\n          <cit:partyIdentifier>\n            <mcc:MD_Identifier>\n              <mcc:code>\n                <gco:CharacterString>https://ror.org/04sjchr03</gco:CharacterString>\n              </mcc:code>\n            </mcc:MD_Identifier>\n          </cit:partyIdentifier>\n          <cit:individual>\n            <cit:CI_Individual>\n              <cit:name>\n                <gco:CharacterString>St-Onge, Joanie</gco:CharacterString>\n              </cit:name>\n              <cit:contactInfo>\n                <cit:CI_Contact>\n                  <cit:address>\n                    <cit:CI_Address>\n                      <cit:deliveryPoint>\n                        <gco:CharacterString></gco:CharacterString>\n                      </cit:deliveryPoint>\n                      <cit:city>\n                        <gco:CharacterString></gco:CharacterString>\n                      </cit:city>\n              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</mcc:code>\n            </mcc:MD_Identifier>\n          </cit:partyIdentifier>\n          <cit:individual>\n            <cit:CI_Individual>\n              <cit:name>\n                <gco:CharacterString>St-Onge, Joanie</gco:CharacterString>\n              </cit:name>\n              <cit:contactInfo>\n                <cit:CI_Contact>\n                  <cit:address>\n                    <cit:CI_Address>\n                      <cit:deliveryPoint>\n                        <gco:CharacterString></gco:CharacterString>\n                      </cit:deliveryPoint>\n                      <cit:city>\n                        <gco:CharacterString></gco:CharacterString>\n                      </cit:city>\n                      <cit:country>\n                        <gco:CharacterString></gco:CharacterString>\n                      </cit:country>\n                      <cit:electronicMailAddress>\n                        <gco:CharacterString>joaniestonge2@gmail.com</gco:CharacterString>\n                      </cit:electronicMailAddress>\n                    </cit:CI_Address>\n                  </cit:address>\n                </cit:CI_Contact>\n              </cit:contactInfo>\n              <cit:positionName>\n                <gco:CharacterString></gco:CharacterString>\n              </cit:positionName>\n            </cit:CI_Individual>\n          </cit:individual>\n        </cit:CI_Organisation>\n      </cit:party>\n    </cit:CI_Responsibility>\n  </mdb:contact>\n  <mdb:dateInfo>\n    <cit:CI_Date>\n      <cit:date>\n        <gco:DateTime>2018-10-31T00:00:00Z</gco:DateTime>\n      </cit:date>\n      <cit:dateType>\n        <cit:CI_DateTypeCode codeList=\"http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#CI_DateTypeCode\" codeListValue=\"revision\">revision</cit:CI_DateTypeCode>\n      </cit:dateType>\n    </cit:CI_Date>\n  </mdb:dateInfo>\n  <mdb:dateInfo>\n    <cit:CI_Date>\n      <cit:date>\n        <gco:Date>2018-10-31</gco:Date>\n      </cit:date>\n      <cit:dateType>\n        <cit:CI_DateTypeCode codeList=\"http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#CI_DateTypeCode\" codeListValue=\"publication\">publication</cit:CI_DateTypeCode>\n      </cit:dateType>\n    </cit:CI_Date>\n  </mdb:dateInfo>\n  <mdb:metadataStandard>\n    <cit:CI_Citation>\n      <cit:title>\n        <gco:CharacterString>ISO 19115-1 Geographic information - Metadata</gco:CharacterString>\n      </cit:title>\n      <cit:edition>\n        <gco:CharacterString>First Edition 2014-04-01</gco:CharacterString>\n      </cit:edition>\n    </cit:CI_Citation>\n  </mdb:metadataStandard>\n  <mdb:metadataStandard>\n    <cit:CI_Citation>\n      <cit:title>\n        <gco:CharacterString>ISO 19115-2 Geographic information - Metadata</gco:CharacterString>\n      </cit:title>\n      <cit:edition>\n        <gco:CharacterString>Second Edition 2019-01</gco:CharacterString>\n      </cit:edition>\n    </cit:CI_Citation>\n  </mdb:metadataStandard>\n  <mdb:metadataStandard>\n    <cit:CI_Citation>\n      <cit:title>\n        <gco:CharacterString>ISO 19115-1 Geographic Information - Metadata Amendment 1</gco:CharacterString>\n      </cit:title>\n      <cit:edition>\n        <gco:CharacterString>2018-02</gco:CharacterString>\n      </cit:edition>\n    </cit:CI_Citation>\n  </mdb:metadataStandard>\n  <mdb:metadataProfile>\n    <cit:CI_Citation>\n      <cit:title>\n        <gco:CharacterString>Canadian Integrated Ocean Observing System Metadata Profile of ISO 19115</gco:CharacterString>\n      </cit:title>\n      <cit:date>\n        <cit:CI_Date>\n          <cit:date>\n            <gco:Date>2019-11-06</gco:Date>\n          </cit:date>\n          <cit:dateType>\n            <cit:CI_DateTypeCode codeList=\"http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#CI_DateTypeCode\" codeListValue=\"publication\">publication</cit:CI_DateTypeCode>\n          </cit:dateType>\n        </cit:CI_Date>\n      </cit:date>\n    </cit:CI_Citation>\n  </mdb:metadataProfile>\n  <mdb:otherLocale>\n    <lan:PT_Locale>\n      <lan:language>\n        <lan:LanguageCode codeList=\"http://standards.iso.org/iso/19115/resources/Codelist/lan/LanguageCode.xml\" codeListValue=\"eng\"></lan:LanguageCode>\n      </lan:language>\n      <lan:country>\n        <lan:CountryCode codeList=\"http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml\" codeListValue=\"CAN\"></lan:CountryCode>\n      </lan:country>\n      <lan:characterEncoding>\n        <lan:MD_CharacterSetCode codeList=\"http://standards.iso.org/iso/19115/resources/Codelist/lan/CharacterSetCode.xml\" codeListValue=\"utf8\" />\n      </lan:characterEncoding>\n    </lan:PT_Locale>\n  </mdb:otherLocale>\n  <mdb:otherLocale>\n    <lan:PT_Locale>\n      <lan:language>\n        <lan:LanguageCode codeList=\"http://standards.iso.org/iso/19115/resources/Codelist/lan/LanguageCode.xml\" codeListValue=\"fra\"></lan:LanguageCode>\n      </lan:language>\n      <lan:country>\n        <lan:CountryCode codeList=\"http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml\" codeListValue=\"CAN\"></lan:CountryCode>\n      </lan:country>\n      <lan:characterEncoding>\n        <lan:MD_CharacterSetCode codeList=\"http://standards.iso.org/iso/19115/resources/Codelist/lan/CharacterSetCode.xml\" codeListValue=\"utf8\" />\n      </lan:characterEncoding>\n    </lan:PT_Locale>\n  </mdb:otherLocale>\n  <mdb:identificationInfo>\n    <mri:MD_DataIdentification>\n      <mri:citation>\n        <cit:CI_Citation>\n          <cit:title xsi:type=\"lan:PT_FreeText_PropertyType\">\n            <gco:CharacterString>Fine-scale time series of surface dimethylsulfide concentrations across ice-covered and ice-free waters of the Canadian Arctic Archipelago in summer, 2017</gco:CharacterString>\n            <lan:PT_FreeText>\n              <lan:textGroup xlink:href=\"https://cioos.ca/translation_method\" xlink:role=\"translation\" xlink:title=\"text translated using the Amazon translate service / texte traduit à l&#39;aide du service de traduction Amazon\">\n                <lan:LocalisedCharacterString locale=\"#fr\">Séries chronologiques à petite échelle des concentrations de diméthylsulfure de surface dans les eaux couvertes de glace et libres de glace de l&#39;archipel arctique canadien en été 2017</lan:LocalisedCharacterString>\n              </lan:textGroup>\n            </lan:PT_FreeText>\n          </cit:title>\n          <cit:date>\n            <cit:CI_Date>\n              <cit:date>\n                <gco:Date>2017-07-12</gco:Date>\n              </cit:date>\n              <cit:dateType>\n                <cit:CI_DateTypeCode codeList=\"http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#CI_DateTypeCode\" codeListValue=\"creation\">creation</cit:CI_DateTypeCode>\n              </cit:dateType>\n            </cit:CI_Date>\n          </cit:date>\n          <cit:date>\n            <cit:CI_Date>\n              <cit:date>\n                <gco:Date>2018-10-31</gco:Date>\n              </cit:date>\n              <cit:dateType>\n                <cit:CI_DateTypeCode codeList=\"http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#CI_DateTypeCode\" codeListValue=\"publication\">publication</cit:CI_DateTypeCode>\n              </cit:dateType>\n            </cit:CI_Date>\n          </cit:date>\n          <cit:date>\n            <cit:CI_Date>\n              <cit:date>\n                <gco:Date>2018-11-08</gco:Date>\n              </cit:date>\n              <cit:dateType>\n                <cit:CI_DateTypeCode codeList=\"http://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#CI_DateTypeCode\" codeListValue=\"revision\">revision</cit:CI_DateTypeCode>\n              </cit:dateType>\n            </cit:CI_Date>\n          </cit:date>\n          <cit:edition>\n            <gco:CharacterString>1.0</gco:CharacterString>\n          </cit:edition>\n          <cit:citedResponsibleParty>\n            <cit:CI_Responsibility>\n              <cit:role>\n                <cit:CI_RoleCode codeList=\"https://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#CI_RoleCode\" codeListValue=\"principalInvestigator\"/>\n              </cit:role>\n              <cit:party>\n                <cit:CI_Individual>\n                  <cit:name>\n                    <gco:CharacterString>Levasseur, Maurice</gco:CharacterString>\n                  </cit:name>\n                  <cit:contactInfo>\n                    <cit:CI_Contact></cit:CI_Contact>\n                  </cit:contactInfo>\n                  <cit:positionName>\n                    <gco:CharacterString></gco:CharacterString>\n                  </cit:positionName>\n                </cit:CI_Individual>\n              </cit:party>\n            </cit:CI_Responsibility>\n          </cit:citedResponsibleParty>\n          <cit:citedResponsibleParty>\n            <cit:CI_Responsibility>\n              <cit:role>\n                <cit:CI_RoleCode codeList=\"https://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#CI_RoleCode\" codeListValue=\"originator\"/>\n              </cit:role>\n              <cit:party>\n                <cit:CI_Individual>\n                  <cit:name>\n                    <gco:CharacterString>St-Onge, Joanie</gco:CharacterString>\n                  </cit:name>\n                  <cit:contactInfo>\n                    <cit:CI_Contact></cit:CI_Contact>\n                  </cit:contactInfo>\n                  <cit:positionName>\n                    <gco:CharacterString></gco:CharacterString>\n                  </cit:positionName>\n                </cit:CI_Individual>\n              </cit:party>\n            </cit:CI_Responsibility>\n          </cit:citedResponsibleParty>\n          <cit:citedResponsibleParty>\n            <cit:CI_Responsibility>\n              <cit:role>\n                <cit:CI_RoleCode codeList=\"https://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#CI_RoleCode\" codeListValue=\"collaborator\"/>\n              </cit:role>\n              <cit:party>\n                <cit:CI_Individual>\n                  <cit:name>\n                    <gco:CharacterString>Lizotte, Martine</gco:CharacterString>\n                  </cit:name>\n                  <cit:contactInfo>\n                    <cit:CI_Contact></cit:CI_Contact>\n                  </cit:contactInfo>\n                  <cit:positionName>\n                    <gco:CharacterString></gco:CharacterString>\n                  </cit:positionName>\n                </cit:CI_Individual>\n              </cit:party>\n            </cit:CI_Responsibility>\n          </cit:citedResponsibleParty>\n          <cit:citedResponsibleParty>\n            <cit:CI_Responsibility>\n              <cit:role>\n                <cit:CI_RoleCode codeList=\"https://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#CI_RoleCode\" codeListValue=\"collaborator\"/>\n              </cit:role>\n              <cit:party>\n                <cit:CI_Individual>\n                  <cit:name>\n                    <gco:CharacterString>Massé, Guillaume</gco:CharacterString>\n                  </cit:name>\n                  <cit:contactInfo>\n                    <cit:CI_Contact></cit:CI_Contact>\n                  </cit:contactInfo>\n                  <cit:positionName>\n                    <gco:CharacterString></gco:CharacterString>\n                  </cit:positionName>\n                </cit:CI_Individual>\n              </cit:party>\n            </cit:CI_Responsibility>\n          </cit:citedResponsibleParty>\n          <cit:citedResponsibleParty>\n            <cit:CI_Responsibility>\n              <cit:role>\n                <cit:CI_RoleCode codeList=\"https://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#CI_RoleCode\" codeListValue=\"collaborator\"/>\n              </cit:role>\n              <cit:party>\n                <cit:CI_Individual>\n                  <cit:name>\n                    <gco:CharacterString>Tremblay, Jean-Éric</gco:CharacterString>\n                  </cit:name>\n                  <cit:contactInfo>\n                    <cit:CI_Contact></cit:CI_Contact>\n                  </cit:contactInfo>\n                  <cit:positionName>\n                    <gco:CharacterString></gco:CharacterString>\n                  </cit:positionName>\n                </cit:CI_Individual>\n              </cit:party>\n            </cit:CI_Responsibility>\n          </cit:citedResponsibleParty>\n        </cit:CI_Citation>\n      </mri:citation>\n      <mri:abstract xsi:type=\"lan:PT_FreeText_PropertyType\">\n        <gco:CharacterString>This study presents sea surface concentrations of marine dimethylsulfide (DMS) measured across the Labrador Sea and the Canadian Arctic Archipelago during summer of 2017 (July-August). Using a novel automated instrument (ACT-MIMS) more than 2500 DMS observations were collected at high frequency alongside ancillary measurements of salinity, temperature, fluorescence (chlorophyll a proxy), solar radiation, ice concentration and the algal precursor of DMS, dimethylsulfoniopropionate. DMS concentrations ranged from ca. 1 to 32 nmol L-1 (average of 6 nmol L-1) in 2017 over an area covering a wide range of contrasting marine environments from coastal to open ocean, ice-free waters, as well as under-ice waters. Surface water DMS hotspots were measured in association with thermohaline oceanographic features in high productivity coastal waters, as well as with the presence of ponded first-year ice (FYI). Nighttime increases and daytime decreases of DMS concentrations were also observed in productive areas of the Labrador Sea and Davis Strait continental shelf. The association of DMS concentrations with diurnal solar radiation variation suggests the involvement of photobiological processes. Overall, our results strengthen the view that aqueous DMS cycling in the Arctic is intimately linked with sea ice dynamics and physiological responses to light. As such, future changes in the seasonality of the Arctic cryosphere will likely play an important role in shaping DMS emissions, although the sign and magnitude of the change remain highly uncertain. </gco:CharacterString>\n        <lan:PT_FreeText>\n          <lan:textGroup xlink:href=\"https://cioos.ca/translation_method\" xlink:role=\"translation\" xlink:title=\"text translated using the Amazon translate service / texte traduit à l&#39;aide du service de traduction Amazon\">\n            <lan:LocalisedCharacterString locale=\"#fr\">Cette étude présente les concentrations de diméthylsulfure (DMS) à la surface de la mer, mesurées dans la mer du Labrador et dans l&#39;archipel arctique canadien au cours de l&#39;été 2017 (juillet-août). À l&#39;aide d&#39;un nouvel instrument automatisé (ACT-MIMS), plus de 2 500 observations DMS ont été recueillies à haute fréquence, ainsi que des mesures auxiliaires de la salinité, de la température, de la fluorescence (la chlorophylle est un indicateur), du rayonnement solaire, de la concentration de glace et du précurseur algal du DMS, le diméthylsulfoniopropionate. Les concentrations de DMS variaient d&#39;environ 1 à 32 nmol L-1 (moyenne de 6 nmol L-1) en 2017 sur une zone couvrant un large éventail d&#39;environnements marins contrastés, allant de la côte à la haute mer, des eaux libres de glace et des eaux sous-glacées. Les points chauds DMS des eaux de surface ont été mesurés en association avec les caractéristiques océanographiques thermohalines des eaux côtières à haute productivité, ainsi qu&#39;avec la présence d&#39;étangs de glace de première année (FYI). Des augmentations nocturnes et des baisses diurnes des concentrations de DMS ont également été observées dans les zones productives de la mer du Labrador et du plateau continental du détroit de Davis. L&#39;association des concentrations de DMS à la variation du rayonnement solaire diurne suggère l&#39;implication de processus photobiologiques. Dans l&#39;ensemble, nos résultats renforcent l&#39;idée selon laquelle le cycle aqueux du DMS dans l&#39;Arctique est étroitement lié à la dynamique de la glace de mer et aux réponses physiologiques à la lumière. 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