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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/333" xlink:actuate="onRequest">silicate</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/618" xlink:actuate="onRequest">sulfur hexafluoride (SF6)</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/5" xlink:actuate="onRequest">total alkalinity</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/392" xlink:actuate="onRequest">Tritium (Hydrogen isotope)</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/373" xlink:actuate="onRequest">WATER TEMPERATURE</gmx:Anchor>
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                <gco:CharacterString>NODC DATA TYPES THESAURUS</gco:CharacterString>
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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/insttype/details/3" xlink:actuate="onRequest">bottle</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/insttype/details/198" xlink:actuate="onRequest">coulometer for DIC measurement</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/insttype/details/8" xlink:actuate="onRequest">CTD</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/insttype/details/156" xlink:actuate="onRequest">spectrophotometer</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/insttype/details/199" xlink:actuate="onRequest">titrator</gmx:Anchor>
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            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="instrument">instrument</gmd:MD_KeywordTypeCode>
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                <gco:CharacterString>NODC INSTRUMENT TYPES THESAURUS</gco:CharacterString>
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      <gmd:descriptiveKeywords>
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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/obstype/details/52" xlink:actuate="onRequest">discrete sample</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/obstype/details/18" xlink:actuate="onRequest">profile</gmx:Anchor>
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          <gmd:type>
            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="theme">theme</gmd:MD_KeywordTypeCode>
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                <gco:CharacterString>NODC OBSERVATION TYPES THESAURUS</gco:CharacterString>
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      <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/platform/details/362" xlink:actuate="onRequest">METEOR</gmx:Anchor>
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          <gmd:type>
            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="platform">platform</gmd:MD_KeywordTypeCode>
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                <gco:CharacterString>NODC PLATFORM NAMES THESAURUS</gco:CharacterString>
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      <gmd:descriptiveKeywords>
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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1606" xlink:actuate="onRequest">GEOMAR Helmholtz Centre for Ocean Research Kiel</gmx:Anchor>
          </gmd:keyword>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1604" xlink:actuate="onRequest">Instituto de Investigacións Mariñas de Vigo</gmx:Anchor>
          </gmd:keyword>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1661" xlink:actuate="onRequest">MARIANDA Marine Analytics and Data</gmx:Anchor>
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          <gmd:type>
            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="dataCentre">dataCentre</gmd:MD_KeywordTypeCode>
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                <gco:CharacterString>NODC COLLECTING INSTITUTION NAMES THESAURUS</gco:CharacterString>
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      <gmd:descriptiveKeywords>
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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1173" xlink:actuate="onRequest">Institut de Ciències del Mar - Barcelona</gmx:Anchor>
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            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="dataCentre">dataCentre</gmd:MD_KeywordTypeCode>
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                <gco:CharacterString>NODC SUBMITTING INSTITUTION NAMES THESAURUS</gco:CharacterString>
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      <gmd:descriptiveKeywords>
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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/project/details/388" xlink:actuate="onRequest">Climate Variability and Predictability (CLIVAR)</gmx:Anchor>
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                <gco:CharacterString>NODC PROJECT NAMES THESAURUS</gco:CharacterString>
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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/33" xlink:actuate="onRequest">Aegean Sea</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/197" xlink:actuate="onRequest">Alboran Sea</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/74" xlink:actuate="onRequest">Ionian Sea</gmx:Anchor>
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          <gmd:keyword>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/59" xlink:actuate="onRequest">Mediterranean Sea - Eastern Basin</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/116" xlink:actuate="onRequest">Mediterranean Sea - Western Basin</gmx:Anchor>
          </gmd:keyword>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/91" xlink:actuate="onRequest">North Atlantic Ocean</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/4" xlink:actuate="onRequest">Strait of Gibraltar</gmx:Anchor>
          </gmd:keyword>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/114" xlink:actuate="onRequest">Tyrrhenian Sea</gmx:Anchor>
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          <gmd:type>
            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="place">place</gmd:MD_KeywordTypeCode>
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          <gmd:thesaurusName>
            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>NODC SEA AREA NAMES THESAURUS</gco:CharacterString>
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              <gmd:date gco:nilReason="inapplicable" />
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      <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
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            <gco:CharacterString>oceanography</gco:CharacterString>
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          <gmd:type>
            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="theme">theme</gmd:MD_KeywordTypeCode>
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                <gco:CharacterString>WMO_CategoryCode</gco:CharacterString>
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          <gmd:keyword>
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                    <gmd:CI_RoleCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="custodian">custodian</gmd:CI_RoleCode>
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      </gmd:descriptiveKeywords>
      <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
          <gmd:keyword>
            <gco:CharacterString>Ocean Carbon and Acidification Data System (OCADS) Project</gco:CharacterString>
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          <gmd:type>
            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="project">project</gmd:MD_KeywordTypeCode>
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            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>Ocean Acidification Search Keywords</gco:CharacterString>
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              <gmd:date gco:nilReason="inapplicable" />
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      <gmd:descriptiveKeywords>
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          <gmd:keyword>
            <gco:CharacterString>CARIMED</gco:CharacterString>
          </gmd:keyword>
          <gmd:type>
            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="project">project</gmd:MD_KeywordTypeCode>
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            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>Reference Section ID</gco:CharacterString>
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      <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/6eb3919b-85ce-4988-8b78-9d0018fd8089" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; OCEAN CHEMISTRY</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/4eab7956-e59e-4615-8d5c-39a16faa1f27" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; OCEAN CHEMISTRY &gt; ALKALINITY</gmx:Anchor>
          </gmd:keyword>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/38219b66-2acd-4f77-a0fc-8241172c9001" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; OCEAN CHEMISTRY &gt; DISSOLVED GASES</gmx:Anchor>
          </gmd:keyword>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/d9b4f30d-bddd-4888-b66b-07d2dc09708b" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; OCEAN CHEMISTRY &gt; INORGANIC CARBON</gmx:Anchor>
          </gmd:keyword>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/4fde380a-38c5-4d46-bc80-4f2515a43983" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; OCEAN CHEMISTRY &gt; NITRATE</gmx:Anchor>
          </gmd:keyword>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/941410da-0b7f-4ec6-a718-212194ced13f" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; OCEAN CHEMISTRY &gt; NITRITE</gmx:Anchor>
          </gmd:keyword>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/90aa8838-79bd-4b28-b518-8217e863c385" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; OCEAN CHEMISTRY &gt; OXYGEN</gmx:Anchor>
          </gmd:keyword>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/4433600b-f323-458a-b295-352f939aab6b" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; OCEAN CHEMISTRY &gt; PH</gmx:Anchor>
          </gmd:keyword>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/0b513d8c-bfd3-44ee-976e-42757b8375a2" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; OCEAN CHEMISTRY &gt; PHOSPHATE</gmx:Anchor>
          </gmd:keyword>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/c91c8879-1b29-48e3-b4cd-a238af66cdaf" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; OCEAN CHEMISTRY &gt; SILICATE</gmx:Anchor>
          </gmd:keyword>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/dd025312-0d27-44e0-ae05-7cfcc1aa17f0" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; OCEAN PRESSURE &gt; WATER PRESSURE</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/e02b0b50-a0f2-4c47-841b-9689fdb99121" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; OCEAN TEMPERATURE &gt; POTENTIAL TEMPERATURE</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/46206e8c-8def-406f-9e62-da4e74633a58" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; OCEAN TEMPERATURE &gt; WATER TEMPERATURE</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/7e95b5fc-1d58-431a-af36-948b29fa870d" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; SALINITY/DENSITY &gt; SALINITY</gmx:Anchor>
          </gmd:keyword>
          <gmd:type>
            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="theme">theme</gmd:MD_KeywordTypeCode>
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            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>Global Change Master Directory (GCMD) Science Keywords</gco:CharacterString>
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                <gmd:CI_Date>
                  <gmd:date>
                    <gco:Date>2026</gco:Date>
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              <gmd:title>
                <gco:CharacterString>OCADS Study Type</gco:CharacterString>
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            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="theme">theme</gmd:MD_KeywordTypeCode>
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                <gco:CharacterString>Provider Keywords</gco:CharacterString>
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            <gco:CharacterString>CTDOXY</gco:CharacterString>
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            <gco:CharacterString>CTDSAL</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>CTDTMP</gco:CharacterString>
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            <gco:CharacterString>DELC13</gco:CharacterString>
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            <gco:CharacterString>DELC14</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>DELHE3</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>DELHER</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>HELIUM</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>NEON</gco:CharacterString>
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            <gco:CharacterString>NITRAT</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>NITRIT</gco:CharacterString>
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            <gco:CharacterString>OXYGEN</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>PHSPHT</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>PH_TOT</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>SF6</gco:CharacterString>
          </gmd:keyword>
          <gmd:keyword>
            <gco:CharacterString>SILCAT</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>TCARBN</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>TRITER</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>TRITUM</gco:CharacterString>
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            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="theme">theme</gmd:MD_KeywordTypeCode>
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          <gmd:thesaurusName>
            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>Provider Variable Abbreviations</gco:CharacterString>
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              <gmd:date gco:nilReason="inapplicable" />
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      <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/01cc0beb-7c9a-40ed-ad86-0661b41aee53" xlink:actuate="onRequest">CTD &gt; Conductivity, Temperature, Depth</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/55facbdc-d4ed-4ee2-a74d-911b084c8ff8" xlink:actuate="onRequest">OPTSPEC &gt; Optical Spectrometer</gmx:Anchor>
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            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="instrument">instrument</gmd:MD_KeywordTypeCode>
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              <gmd:title>
                <gco:CharacterString>Global Change Master Directory (GCMD) Instrument Keywords</gco:CharacterString>
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              <gmd:date>
                <gmd:CI_Date>
                  <gmd:date>
                    <gco:Date>2026</gco:Date>
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      </gmd:descriptiveKeywords>
      <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
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            <gmd:MD_KeywordTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="platform">platform</gmd:MD_KeywordTypeCode>
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                <gco:CharacterString>NCEI Accession 0108079 was revised and v3.3 was published.</gco:CharacterString>
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                <gco:DateTime>2017-05-25T15:26:17Z</gco:DateTime>
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                        <gco:CharacterString>NCEI Accession 0108079 v3.3</gco:CharacterString>
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                <gco:CharacterString>NCEI Accession 0108079 was revised and v4.4 was published.</gco:CharacterString>
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                <gco:DateTime>2022-03-25T20:14:03Z</gco:DateTime>
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                        <gco:CharacterString>NCEI Accession 0108079 v4.4</gco:CharacterString>
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                <gco:CharacterString>NCEI Accession 0108079 was revised and v5.5 was published.</gco:CharacterString>
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                <gco:DateTime>2026-07-22T18:58:28Z</gco:DateTime>
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                        <gco:CharacterString>NCEI Accession 0108079 v5.5</gco:CharacterString>
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  <gmd:dataQualityInfo>
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              <gmd:description>
                <gco:CharacterString>Parameter or Variable: Dissolved Inorganic Carbon;
Abbreviation: TCARBN;
Observation type: discrete;
In-situ / Manipulation / Response variable: in-situ observation;
Measured or calculated: Calculated;
Sampling instrument: Niskin Bottles;
Detailed sampling and analyzing information: The measurement was carried out with SOMMA # 014 belonging to IfM Geomar Kiel. Samples were thermostated at 20 (+/- 0.2) degC. A calibrated thermostated pipette (volume approx. 26 ml) was filled with the sample by gas pressure (nitrogen), the sample was transferred to the stripper, acidified with phosphoric acid (approx. 10% solution) and extracted with nitrogen as carrier gas. Liberated CO2 was measured with an UIC COULOMETER type 5012.;
Standardization description: The precision was controlled by titration of several bottles filled from the same Niskin bottles at two different locations. From these results, it can be concluded that precision is ±0.6 μmol kg−1 or better. The accuracy was checked by running a total of 42 bottles of certified reference material (CRM, batch 108). Standards were run occasionally (18 times) in duplicate from the same bottle (if the first value differed by more than 1 μmol kg−1 from the certified value). However, only the first result was taken, since it cannot be excluded, that the bottle was affected by contact with lab air between first and second measurement. The second only had the purpose to flag the bottle questionable, should the second measurement deviate by more than 1 μmol kg−1 from the first measurement (this was not the case).The certified value is given with a standard deviation of ± 0.7 μmol kg−1. The precision of the analysis was ± 0.6 μmol kg−1 and the accuracy was determined to be ±2.5 μmol kg−1.;
CRM batch number: 108;
Researcher name: L. Mintrop (MARIANDA), M. Álvarez (IEO)</gco:CharacterString>
              </gmd:description>
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              <gmd:description>
                <gco:CharacterString>Parameter or Variable: Total alkalinity;
Abbreviation: ALKALI;
Observation type: discrete;
In-situ / Manipulation / Response variable: in-situ observation;
Measured or calculated: Measured;
Sampling instrument: Niskin Bottles;
Type of titration: Gran;
Curve fitting method: Total Alkalinity (TA) along the METEOR 84/3 cruise was analyzed following a double end point potentiometric technique by Pérez and Fraga (1987) further improved in Pérez et al. (2002);
Detailed sampling and analyzing information: Samples for alkalinity determination were collected in 600mL borosilicate bottles and were analysed within one day after sampling. Samples were analysed following the double end point potentiometric technique by Pérez and Fraga (Mar. Chem., 1987) and Pérez et al. (CC.MM., 2000). Measurements of CRM were performed in order to control the accuracy of the alkalinity measurements; the pH as measured by the electrode was corrected to obtain the closest mean alkalinity to the CRM; the pH correction was never larger than 0.05. The precision of the alkalinity measurements was better than ±0.6 μmol kg−1 determined from duplicate Niskin bottles, and the accuracy of the alkalinity measurements (i.e. including sampling errors) is determined to be 1 μmol kg−1 . Additionally, the daily drift of the system was determined by regular measurements of a substandard (surface seawater); this drift was always very low. The precision of the analysis was ± 0.6 µmol/kg and the accuracy was determined to be 1 µmol/kg.;
Method reference: Pérez and Fraga (1987);
Researcher name: M. Álvarez (IEO)</gco:CharacterString>
              </gmd:description>
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          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: pH;
Abbreviation: PH_TOT;
pH scale: Total;
Observation type: discrete;
In-situ / Manipulation / Response variable: in-situ observation;
Measured or calculated: Measured;
Sampling instrument: Niskin bottles;
Temperature of pH measurement: 25C;
Detailed sampling and analyzing information: pH was measured in cylindrical optical glass 10-cm pathlength cells with a spectrophotometric procedure (Clayton and Byrne, DSR I, 1993). pH is reported in the total scale at 25 ˚C (pHST25). The precision was estimated to ±0.0012 by measuring replicates from the same Niskin bottle. Regarding the accuracy, the theoretical pH25T value for the 108 CRM batch using the dissociation constants from Mehrbach et al. (LO, 1973) refitted by Dickson and Millero (DSR, 1987) is 7.8782. Replicate pH measurements along the cruise on CRMs are lower than the theoretical value by 0.0962±0.0012 pH units. An internal consistency analysis showed that this correction should not be applied.;
Uncertainty: The mean of the STD is ±0.0012 which could be considered as the reproducibility of pH measurements during the cruise.;
Researcher name: M. Álvarez (IEO)</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: CTD WATER TEMPERATURE;
Abbreviation: CTDTMP;
Unit: DEG_C;
Controlled vocabulary name: CTD WATER TEMPERATURE;
Observation type: Profile;
In-situ / Manipulation / Response variable: in-situ observation;
Researcher name: D. Hainbucher (ZMAW), V. Cardin (OGS)</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
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          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: CTD SALINITY;
Abbreviation: CTDSAL;
Controlled vocabulary name: CTD SALINITY;
Observation type: Profile;
In-situ / Manipulation / Response variable: in-situ observation;
Researcher name: D. Hainbucher (ZMAW), V. Cardin (OGS)</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: CTDOXY;
Abbreviation: CTDOXY;
Unit: UMOL/KG;
Controlled vocabulary name: DISSOLVED OXYGEN;
Observation type: Profile;
In-situ / Manipulation / Response variable: in-situ observation;
Researcher name: D. Hainbucher (ZMAW), V. Cardin (OGS)</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: Dissolved Oxygen;
Abbreviation: OXYGEN;
Unit: UMOL/KG;
Controlled vocabulary name: Dissolved Oxygen;
Observation type: Bottle discrete;
In-situ / Manipulation / Response variable: in-situ observation;
Sampling instrument: Niskin bottles;
Researcher name: M. Álvarez (IEO)</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: Silicate;
Abbreviation: SILCAT;
Unit: UMOL/KG;
Controlled vocabulary name: Silicate;
Observation type: Bottle discrete;
In-situ / Manipulation / Response variable: in-situ observation;
Sampling instrument: Niskin bottles;
Researcher name: T. Tanhua, G. Civitarese (OGS)</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: Nitrate;
Abbreviation: NITRAT;
Unit: UMOL/KG;
Controlled vocabulary name: Nitrate;
Observation type: Bottle discrete;
In-situ / Manipulation / Response variable: in-situ observation;
Sampling instrument: Niskin bottles;
Researcher name: T. Tanhua, G. Civitarese (OGS)</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: Nitrite;
Abbreviation: NITRIT;
Unit: UMOL/KG;
Controlled vocabulary name: Nitrite;
Observation type: Bottle discrete;
In-situ / Manipulation / Response variable: in-situ observation;
Sampling instrument: Niskin bottles;
Researcher name: T. Tanhua, G. Civitarese (OGS)</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: Phosphate;
Abbreviation: PHSPHT;
Unit: UMOL/KG;
Controlled vocabulary name: Phosphate;
Observation type: Bottle discrete;
In-situ / Manipulation / Response variable: in-situ observation;
Sampling instrument: Niskin bottles;
Researcher name: T. Tanhua, G. Civitarese (OGS)</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: Chlorofluorocarbon 12;
Abbreviation: CFC-12;
Unit: PMOL/KG;
Controlled vocabulary name: Chlorofluorocarbon 12;
Observation type: Bottle discrete;
In-situ / Manipulation / Response variable: in-situ observation;
Sampling instrument: Niskin bottles;
Researcher name: T. Tanhua</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: SF6;
Abbreviation: SF6;
Unit: FMOL/KG;
Controlled vocabulary name: Sulfur Hexaflouride (SF6);
Observation type: Bottle discrete;
In-situ / Manipulation / Response variable: in-situ observation;
Sampling instrument: Niskin bottles;
Researcher name: T. Tanhua</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: TRITUM;
Abbreviation: TRITUM;
Unit: TU;
Controlled vocabulary name: Tritium (Hydrogen isotope);
In-situ / Manipulation / Response variable: in-situ observation;
Researcher name: T. Tanhua</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: TRITER;
Abbreviation: TRITER;
Unit: TU;
In-situ / Manipulation / Response variable: in-situ observation;
Researcher name: T. Tanhua</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: HELIUM;
Abbreviation: HELIUM;
Unit: NMOL/KG;
Controlled vocabulary name: HELIUM;
In-situ / Manipulation / Response variable: in-situ observation;
Researcher name: T. Tanhua</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: DELHE3;
Abbreviation: DELHE3;
Unit: PERCNT;
Controlled vocabulary name: DELTA HELIUM-3;
In-situ / Manipulation / Response variable: in-situ observation;
Method reference: T. Tanhua</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: DELHER;
Abbreviation: DELHER;
Unit: PERCNT;
Controlled vocabulary name: DELTA HELIUM-3;
In-situ / Manipulation / Response variable: in-situ observation;
Researcher name: T. Tanhua</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: NEON;
Abbreviation: NEON;
Unit: NMOL/KG;
Controlled vocabulary name: NEON;
In-situ / Manipulation / Response variable: in-situ observation;
Researcher name: T. Tanhua</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: Delta C14;
Abbreviation: DELC14;
Unit: /MILLE;
Controlled vocabulary name: Delta C14;
Observation type: Discrete bottle;
In-situ / Manipulation / Response variable: in-situ observation;
Sampling instrument: Niskin bottles;
Researcher name: Robert Key;
Researcher institution: Princeton University</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: Delta C13;
Abbreviation: DELC13;
Unit: /MILLE;
Controlled vocabulary name: Delta C13;
Observation type: Discrete bottle;
In-situ / Manipulation / Response variable: in-situ observation;
Sampling instrument: Niskin bottles;
Researcher name: Robert Key;
Researcher institution: Princeton University</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Parameter or Variable: BARIUM;
Abbreviation: BARIUM;
Unit: UM/KG;
Controlled vocabulary name: BARIUM;
Observation type: Discrete bottle;
In-situ / Manipulation / Response variable: in-situ observation;
Sampling instrument: Niskin bottles;
Researcher name: Robert Key;
Researcher institution: Princeton University</gco:CharacterString>
              </gmd:description>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
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          <gmd:levelDescription>
            <gmd:MD_ScopeDescription>
              <gmd:other>
                <gco:CharacterString>NOAA National Centers for Environmental Information</gco:CharacterString>
              </gmd:other>
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          </gmd:levelDescription>
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            <gmi:LE_ProcessStep>
              <gmd:description>
                <gco:CharacterString>NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.</gco:CharacterString>
              </gmd:description>
              <gmd:dateTime>
                <gco:DateTime>2015-04-22T00:00:00</gco:DateTime>
              </gmd:dateTime>
            </gmi:LE_ProcessStep>
          </gmd:processStep>
        </gmd:LI_Lineage>
      </gmd:lineage>
    </gmd:DQ_DataQuality>
  </gmd:dataQualityInfo>
  <gmd:metadataMaintenance>
    <gmd:MD_MaintenanceInformation>
      <gmd:maintenanceAndUpdateFrequency>
        <gmd:MD_MaintenanceFrequencyCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#MD_MaintenanceFrequencyCode" codeListValue="asNeeded">asNeeded</gmd:MD_MaintenanceFrequencyCode>
      </gmd:maintenanceAndUpdateFrequency>
      <gmd:maintenanceNote>
        <gco:CharacterString>Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.</gco:CharacterString>
      </gmd:maintenanceNote>
      <gmd:contact>
        <gmd:CI_ResponsibleParty>
          <gmd:organisationName>
            <gco:CharacterString>NOAA National Centers for Environmental Information</gco:CharacterString>
          </gmd:organisationName>
          <gmd:role>
            <gmd:CI_RoleCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="custodian">custodian</gmd:CI_RoleCode>
          </gmd:role>
        </gmd:CI_ResponsibleParty>
      </gmd:contact>
    </gmd:MD_MaintenanceInformation>
  </gmd:metadataMaintenance>
  <gmi:acquisitionInformation>
    <gmi:MI_AcquisitionInformation id="AMS">
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_beec">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>bottle</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>bottle</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>any type of water bottle sampling device

Generic name for water collection device; usually used to determine temperature, salinity and provide water aliquots for measurement of a wide range of parameters; often referred to by a specific type of water sampling bottle, such as a Nansen or Niskin bottle.</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_be29">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>coulometer for DIC measurement</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>coulometer for DIC measurement</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>measures dissolved inorganic carbon (DIC)

A known amount of seawater is dispensed into a stripping chamber where it is acidified and purged with an inert gas. The amount of CO2 in the resulting gas stream is determined by absorbing the CO2 in an absorbent. The pH of the solution is monitored by measuring the transmittance .</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_bee7">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>CTD</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>CTD</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>Conductivity-Temperature-Depth probe</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_be73">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>spectrophotometer</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>spectrophotometer</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>spectrophotometer, optical spectrometer, spectrograph or spectroscope

An optical spectrometer (spectrophotometer, spectrograph or spectroscope) is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum, typically used in spectroscopic analysis to identify materials.

Butler, L. R. P.; Laqua, K. (1995). "Nomenclature, symbols, units and their usage in spectrochemical analysis-IX. Instrumentation for the spectral dispersion and isolation of optical radiation (IUPAC Recommendations 1995)". Pure Appl. Chem. IUPAC. 67 (10): 1725–1744. doi:10.1351/pac199567101725. A spectrometer is the general term for describing a combination of spectral apparatus with one or more detectors to measure the intensity of one or more spectral bands."</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_be28">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>titrator</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>titrator</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>titrator</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:platform>
        <gmi:MI_Platform id="plat_bf85">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>METEOR</gco:CharacterString>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:description>
            <gco:CharacterString>Updated information from ICES for the vessel METEOR from GERMANY.

Code : 06MT
Name : METEOR
Flag : GERMANY - DE (ISO Country Code)
Call Sign : DBBH
Platform Class : Research vessel
IMO : 6407573
Commissioned Date : 1964
Decommissioned Date : 1985
Current Length : 82.10
Built : 1964
Notes : Was operated by the German Hydrographic Institute (DHI).
Information Source : http://de.wikipedia.org/wiki/Meteor_(1964) (URL)

Same Vessels Info
61RA - RAPUHIA

General Comments:
Built as a stern trawler/research vessel under yard No 889 by A. G. ‘Weser’ Werft Seebeck, Bremerhaven for the Deutsche Forschungsgemeinschaft, Hamburg.
In 1985 sold to New Zealand (Dept. of Scientific &amp; Industrial Research) and renamed RAPUHIA.
Further info: http://www.shipstamps.co.uk/forum/viewtopic.php?f=2&amp;t=5824&amp;start=0</gco:CharacterString>
          </gmi:description>
          <gmi:instrument gco:nilReason="missing" />
        </gmi:MI_Platform>
      </gmi:platform>
    </gmi:MI_AcquisitionInformation>
  </gmi:acquisitionInformation>
</gmi:MI_Metadata>