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            <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/dataset/986658.rdf" xlink:actuate="onRequest">Vertical gas concentrations in exposed silicate sand beach on Santa Rosa Island, FL measured on Jun 7th, 2024</gmx:Anchor>
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        <gco:CharacterString>O2 and CO2 profiles Pensacola Jun 2024 Dataset Description:  Methods and Sampling: &amp;lt;p&amp;gt;&amp;lt;strong&amp;gt;Study Site&amp;lt;/strong&amp;gt;&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;The project used an exposed silicate sand beach on Santa Rosa Island near Pensacola Beach in the northeastern Gulf (30 20.917 N, 087 02.917 W). The sediment at this site is composed of quartz sand. Air temperature ranges from 6 to 39˚C and water temperature from 14 to 32˚C. Tidal range at this site is 0.6 m.&amp;amp;nbsp;&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;&amp;lt;strong&amp;gt;Measurements&amp;lt;/strong&amp;gt;&amp;lt;/p&amp;gt;

&amp;lt;p&amp;gt;Gas (custom probe, 70 cm long, 5 mm diameter) and temperature probes (PT100) were placed at 5 cm above the sediment and at 0, -5, -10, -15, -20, -25, -30, -35, -40, -45, -50 cm below the sediment surface. Pore gas was extracted from the sediment using a syringe pump (150 ml max. volume). After extraction of gas from the sediment, a set of stopcocks was used to switch the flow path of the syringe pump from the respective probe to a Pyroscience flow-through O&amp;lt;sub&amp;gt;2 &amp;lt;/sub&amp;gt;optode installed in series with a Licor840A gas analyzer, where the CO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; concentrations were measured.&amp;lt;/p&amp;gt;</gco:CharacterString>
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        <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/award/895913.rdf" xlink:title="OCE-2049177" xlink:actuate="onRequest">Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-2049177 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=2049177</gmx:Anchor>
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                      <gmd:CI_Citation>
                        <gmd:title>
                          <gco:CharacterString>Specified by BCO-DMO Data Managers</gco:CharacterString>
                        </gmd:title>
                        <gmd:date gco:nilReason="unknown"/>
                      </gmd:CI_Citation>
                    </gmd:sourceCitation>
                  </gmd:LI_Source>
                </gmd:source>
              </gmd:LI_ProcessStep>
            </gmd:processStep>
          </gmd:LI_Lineage>
      </gmd:lineage>
   </gmd:DQ_DataQuality>
  </gmd:dataQualityInfo>
  <gmd:metadataMaintenance>
    <gmd:MD_MaintenanceInformation>
      <gmd:maintenanceAndUpdateFrequency>
        <gmd:MD_MaintenanceFrequencyCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_MaintenanceFrequencyCode" codeListValue="asNeeded" codeSpace="009">asNeeded</gmd:MD_MaintenanceFrequencyCode>
      </gmd:maintenanceAndUpdateFrequency>
      <gmd:maintenanceNote>
        <gco:CharacterString>7.x-1.1</gco:CharacterString>
      </gmd:maintenanceNote>
      <gmd:contact>
        <gmd:CI_ResponsibleParty>
  <gmd:organisationName>
    <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/affiliation/191.rdf" xlink:actuate="onRequest">Biological and Chemical Oceanography Data Management Office (BCO-DMO)</gmx:Anchor>
  </gmd:organisationName>
  <gmd:contactInfo>
    <gmd:CI_Contact>
		  <gmd:phone>
		    <gmd:CI_Telephone>
				  <gmd:voice>
				    <gco:CharacterString>Unavailable</gco:CharacterString>
				  </gmd:voice>
				  <gmd:facsimile>
				    <gco:CharacterString>508-289-2009</gco:CharacterString>
				  </gmd:facsimile>
				</gmd:CI_Telephone>
		  </gmd:phone>
		  <gmd:address>
		    <gmd:CI_Address>
				  <gmd:deliveryPoint>
				    <gco:CharacterString>WHOI MS#36</gco:CharacterString>
				  </gmd:deliveryPoint>
				  <gmd:city>
				    <gco:CharacterString>Woods Hole</gco:CharacterString>
				  </gmd:city>
				  <gmd:administrativeArea>
				    <gco:CharacterString>MA</gco:CharacterString>
				  </gmd:administrativeArea>
				  <gmd:postalCode>
				    <gco:CharacterString>02543</gco:CharacterString>
				  </gmd:postalCode>
				  <gmd:country>
				    <gco:CharacterString>USA</gco:CharacterString>
				  </gmd:country>
				  <gmd:electronicMailAddress>
				    <gco:CharacterString>info@bco-dmo.org</gco:CharacterString>
				  </gmd:electronicMailAddress>
		    </gmd:CI_Address>
		  </gmd:address>
      <gmd:onlineResource>
          <gmd:CI_OnlineResource>
            <gmd:linkage>
              <gmd:URL>http://www.bco-dmo.org</gmd:URL>
            </gmd:linkage>
          </gmd:CI_OnlineResource>
        </gmd:onlineResource>
		  <gmd:hoursOfService>
        <gco:CharacterString>Monday - Friday 8:00am - 5:00pm</gco:CharacterString>
      </gmd:hoursOfService>
		  <gmd:contactInstructions>
		    <gco:CharacterString>For questions regarding this resource, please contact BCO-DMO via the email address provided.</gco:CharacterString>
		  </gmd:contactInstructions>
		</gmd:CI_Contact>
  </gmd:contactInfo>
  <gmd:role>
    <gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="pointOfContact"  codeSpace="007">pointOfContact</gmd:CI_RoleCode>
  </gmd:role>
</gmd:CI_ResponsibleParty>
      </gmd:contact>
    </gmd:MD_MaintenanceInformation>
  </gmd:metadataMaintenance>
  <gmi:acquisitionInformation>
    <gmi:MI_AcquisitionInformation>
    <gmi:instrument>
        <gmi:MI_Instrument>
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/instrument/989120.rdf" xlink:title="LI-COR LI-840A CO2/H2O gas analyser" xlink:actuate="onRequest">LI-840A CO2/H2O Gas Analyzer</gmx:Anchor>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>LI-840A CO2/H2O Gas Analyzer</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>PI Supplied Instrument Name: LI-840A CO2/H2O Gas Analyzer PI Supplied Instrument Description:Carbon dioxide and moisture was measured with a LI-840A CO2/H2O Gas Analyzer is an infrared (NDIR) gas analyzer based on a single path, dual wavelength, infrared detection system. The CO2 measurements are a function of the absorption of IR energy as it travels through the optical path. Concentration measurements are based on the difference ratio in the IR absorption between a reference and sample signal. The instrument uses digital signal processing techniques to determine the temperature and pressure corrected CO2 concentration. The data output provides CO2 concentrations in µmol per mole of air (ppm). Instrument Name: LI-COR LI-840A CO2/H2O gas analyser Instrument Short Name:LI-840A   Instrument Description: The LI-840A is an absolute, non-dispersive infrared gas analyser based on single path, dual wavelength and thermostatically controlled infrared detection system. Operating temperature range of -20 to +40 deg C. CO2 is measured in the range 0-20,000 ppm with an accuracy of better than 1 percent of the reading. H2O is measured in the range 0-60 ppt with an accuracy of better than 1.5 percent of reading.</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument>
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gmx:Anchor xlink:href="http://lod.bco-dmo.org/id/instrument/705.rdf" xlink:title="Oxygen Sensor" xlink:actuate="onRequest">Pyroscience FireSting-O2 meter</gmx:Anchor>
              </gmd:code>
            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
            <gco:CharacterString>Pyroscience FireSting-O2 meter</gco:CharacterString>
          </gmi:type>
          <gmi:description>
            <gco:CharacterString>PI Supplied Instrument Name: Pyroscience FireSting-O2 meter PI Supplied Instrument Description:Pore gas oxygen concentrations were measured with a Pyroscience FireSting-O2 meter. This instrument is a PC-controlled (USB) fiber-optic oxygen meter can read optical oxygen sensors. It allows automatic temperature compensation of the oxygen measurements in samples with varying temperatures. Instrument Name: Oxygen Sensor Instrument Short Name:Dissolved Oxygen Sensor   Instrument Description: An electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
      </gmi:MI_AcquisitionInformation>
  </gmi:acquisitionInformation>
</gmi:MI_Metadata>
