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            <gco:CharacterString>FAMOSO</gco:CharacterString>
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          <gmd:thesaurusName>
            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>Cruise ID</gco:CharacterString>
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                <gco:CharacterString>EXPOCODE</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>
          </gmd:type>
          <gmd:thesaurusName>
            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>Ocean Acidification Search Keywords</gco:CharacterString>
              </gmd:title>
              <gmd:date gco:nilReason="inapplicable" />
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          </gmd:thesaurusName>
        </gmd:MD_Keywords>
      </gmd:descriptiveKeywords>
      <gmd:descriptiveKeywords>
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          <gmd:keyword>
            <gco:CharacterString>Mediterranean Sea</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>
          </gmd:type>
          <gmd:thesaurusName>
            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>Reference Section ID</gco:CharacterString>
              </gmd:title>
              <gmd:date gco:nilReason="inapplicable" />
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          </gmd:thesaurusName>
        </gmd:MD_Keywords>
      </gmd:descriptiveKeywords>
      <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
          <gmd:keyword>
            <gco:CharacterString>CARIMED</gco:CharacterString>
          </gmd:keyword>
          <gmd:keyword>
            <gco:CharacterString>MedSea</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>
          </gmd:type>
          <gmd:thesaurusName>
            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>Research Projects</gco:CharacterString>
              </gmd:title>
              <gmd:date gco:nilReason="inapplicable" />
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          </gmd:thesaurusName>
        </gmd:MD_Keywords>
      </gmd:descriptiveKeywords>
      <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
          <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/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/46206e8c-8def-406f-9e62-da4e74633a58" xlink:actuate="onRequest">EARTH SCIENCE &gt; OCEANS &gt; OCEAN TEMPERATURE &gt; WATER TEMPERATURE</gmx:Anchor>
          </gmd:keyword>
          <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>
          </gmd:type>
          <gmd:thesaurusName>
            <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:CI_DateTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="revision">revision</gmd:CI_DateTypeCode>
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                </gmd:CI_Date>
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                <gco:CharacterString>24</gco:CharacterString>
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                    <gmd:CI_Contact>
                      <gmd:address>
                        <gmd:CI_Address>
                          <gmd:city>
                            <gco:CharacterString>Greenbelt</gco:CharacterString>
                          </gmd:city>
                          <gmd:administrativeArea>
                            <gco:CharacterString>MD</gco:CharacterString>
                          </gmd:administrativeArea>
                        </gmd:CI_Address>
                      </gmd:address>
                      <gmd:onlineResource>
                        <gmd:CI_OnlineResource>
                          <gmd:linkage>
                            <gmd:URL>https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords</gmd:URL>
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                            <gco:CharacterString>HTTPS</gco:CharacterString>
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            <gco:CharacterString>Discrete measurement</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>Profile</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>OCADS Study Type</gco:CharacterString>
              </gmd:title>
              <gmd:date gco:nilReason="inapplicable" />
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          </gmd:thesaurusName>
        </gmd:MD_Keywords>
      </gmd:descriptiveKeywords>
      <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
          <gmd:keyword>
            <gco:CharacterString>CARIMED</gco:CharacterString>
          </gmd:keyword>
          <gmd:keyword>
            <gco:CharacterString>MedSea</gco:CharacterString>
          </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>
          </gmd:type>
          <gmd:thesaurusName>
            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>Provider Keywords</gco:CharacterString>
              </gmd:title>
              <gmd:date gco:nilReason="inapplicable" />
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          </gmd:thesaurusName>
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      <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
          <gmd:keyword>
            <gco:CharacterString>ALKALI</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>CTDOXY</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>CTDSAL</gco:CharacterString>
          </gmd:keyword>
          <gmd:keyword>
            <gco:CharacterString>CTDTMP</gco:CharacterString>
          </gmd:keyword>
          <gmd:keyword>
            <gco:CharacterString>NITRAT</gco:CharacterString>
          </gmd:keyword>
          <gmd:keyword>
            <gco:CharacterString>PHSPHT</gco:CharacterString>
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          <gmd:keyword>
            <gco:CharacterString>PHTS25P0</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>
          </gmd:type>
          <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:descriptiveKeywords>
        <gmd:MD_Keywords>
          <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>
          </gmd:keyword>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/b79c7e06-cd07-442f-bf12-2019cd71c201" xlink:actuate="onRequest">NISKIN BOTTLES</gmx:Anchor>
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          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/5c38595e-5e7d-4513-9f0e-aa9b5f6b139f" xlink:actuate="onRequest">PH METERS &gt; PH METERS</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>
          </gmd:type>
          <gmd:thesaurusName>
            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>Global Change Master Directory (GCMD) Instrument Keywords</gco:CharacterString>
              </gmd:title>
              <gmd:date>
                <gmd:CI_Date>
                  <gmd:date>
                    <gco:Date>2026</gco:Date>
                  </gmd:date>
                  <gmd:dateType>
                    <gmd:CI_DateTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="revision">revision</gmd:CI_DateTypeCode>
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                <gco:CharacterString>24</gco:CharacterString>
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                      <gmd:address>
                        <gmd:CI_Address>
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                          </gmd:city>
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                            <gco:CharacterString>MD</gco:CharacterString>
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                      </gmd:address>
                      <gmd:onlineResource>
                        <gmd:CI_OnlineResource>
                          <gmd:linkage>
                            <gmd:URL>https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords</gmd:URL>
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                            <gco:CharacterString>HTTPS</gco:CharacterString>
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                            <gmd:CI_OnLineFunctionCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode>
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      </gmd:descriptiveKeywords>
      <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/1bb21d0f-bf48-42b5-8e09-cc0d58407e4a" xlink:actuate="onRequest">Ships</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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          <gmd:thesaurusName>
            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>Global Change Master Directory (GCMD) Platform Keywords</gco:CharacterString>
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                <gmd:CI_Date>
                  <gmd:date>
                    <gco:Date>2026</gco:Date>
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                  <gmd:dateType>
                    <gmd:CI_DateTypeCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="revision">revision</gmd:CI_DateTypeCode>
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              <gmd:edition>
                <gco:CharacterString>24</gco:CharacterString>
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                <gmd:CI_ResponsibleParty>
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                          <gmd:administrativeArea>
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                      </gmd:address>
                      <gmd:onlineResource>
                        <gmd:CI_OnlineResource>
                          <gmd:linkage>
                            <gmd:URL>https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords</gmd:URL>
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      <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://vocab.ices.dk/services/pox/GetCodeDetail/SHIPC/29AH" xlink:actuate="onRequest">SARMIENTO DE GAMBOA (call sign: EAKF, ICES code: 29AH)</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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          <gmd:thesaurusName>
            <gmd:CI_Citation>
              <gmd:title>
                <gco:CharacterString>ICES/SeaDataNet Ship Codes</gco:CharacterString>
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              <gmd:date gco:nilReason="inapplicable" />
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      </gmd:descriptiveKeywords>
      <gmd:descriptiveKeywords>
        <gmd:MD_Keywords>
          <gmd:keyword>
            <gmx:Anchor xlink:href="https://cmr.earthdata.nasa.gov/kms/concept/c322d007-8d19-451b-ba46-daa216782248" xlink:actuate="onRequest">OCEAN &gt; ATLANTIC OCEAN &gt; NORTH ATLANTIC OCEAN &gt; MEDITERRANEAN SEA</gmx:Anchor>
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In-situ / Manipulation / Response variable: in-situ observation;
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Abbreviation: PHSPHT;
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Controlled vocabulary name: Phosphate;
Observation type: discrete;
In-situ / Manipulation / Response variable: in-situ observation;
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Analyzing instrument: potentiometric open cell titration;
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Abbreviation: PHTS25P0;
Controlled vocabulary name: pH;
Observation type: Bottle discrete;
In-situ / Manipulation / Response variable: in-situ observation;
Detailed sampling and analyzing information: The pH was measured following the spectrophotometric method of Clayton and Byrne (1993) using m-cresol purple as indicator, and consequently, the scale used was total. Samples were collected directly from the rosette in 10cm path-length optical glass cells and measurements were carried out on board with a Shimadzu UV-2401PC spectrophotometer containing a 25˚C-thermostated cells holder. Seawater, also previously thermostated to 25˚C, was analyzed for a blank determination at 730, 578 and 434 nm and 50 μl of the dye was subsequently injected and the measurements repeated. Three photometric replicates were carried out for each injection in order to remove any dye effect.;
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