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            <gmd:LocalisedCharacterString locale="#EN">This is a reference to data collected at the Loobos pine forest site near Kootwijk, managed by the Meteorology and Air Quality group, Wageningen University (contact: observations.maq@wur.nl). On https://maq-observations.nl/ we offer all operational measurements from three sites: Veenkampen, Loobos and Amsterdam. These observations include, but do not limit themselves to, temperature, humidity, wind, radiation, soil moisture, soil temperature, energy and carbon fluxes and air quality (e.g. NOx, O3, PM). We offer up-to date charts of the current weather and air quality, as well as a historic dataset to explore, plot and download. You can visualize and download the data with our carefully designed graphical user interface, or download it using a custom tailored API key. We offer up to 627 data streams divided over the three stations at a temporal resolution of up to 20 seconds. Loobos is located in a Pine forest the Veluwe natural park, one of the largest European natural areas. Pine are the dominant species in the Veluwe. Hence Loobos is representative for a much larger acreage. The site was first established in 1995 and was home to one of the 3 first ecosystem flux sites globally. In 2021 a new tower was built and equipped. The research at Loobos aims at understanding the role of the ecosystem in the carbon and water cycle. As the forest, planted in the 1910’s, grows, it takes up CO2 from the atmosphere. This is an important feedback to climate change. But the amount of uptake depends on availability of water, temperature, radiation and air quality. Hence it is a very dynamic system, which we try to understand and predict. The research is done by MAQ at Wageningen University with Utrecht and Delft University as partners via the Ruisdael Observatory. Forest research is done by other groups in Wageningen as well, e.g. the GIS and Remote Sensing group collects LIDAR measurements of ecosystem geometry. We welcome other experimental groups and campaigns. A 36 m tall tower is built at the site in 2021, hosting eddy covariance instruments (CO2, heat, evaporation, Volatile Organic Compounds), radiation instruments, profiles of temperature, water vapour, CO2, wind speed. Soil temperature, moisture and heat flux and water table depth measurements are collected around the tower.</gmd:LocalisedCharacterString>
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            <gmd:LocalisedCharacterString locale="#DUT">Dit is een verwijzing naar gegevens die zijn verzameld in het Loobos-dennenbos bij Kootwijk, beheerd door de groep Meteorologie en Luchtkwaliteit van de Universiteit Wageningen (contact: observations.maq@wur.nl). Op https://maq-observations.nl/ bieden wij alle operationele metingen aan vanuit drie locaties: Veenkampen, Loobos en Amsterdam. Deze waarnemingen omvatten, maar beperken zich niet tot, temperatuur, vochtigheid, wind, straling, bodemvocht, bodemtemperatuur, energie- en koolstoffluxen en luchtkwaliteit (bijv. NOx, O3, PM). We bieden actuele grafieken van het huidige weer en de luchtkwaliteit, evenals een historische dataset om te verkennen, in kaart te brengen en te downloaden. U kunt de gegevens visualiseren en downloaden met onze zorgvuldig ontworpen grafische gebruikersinterface, of downloaden met behulp van een op maat gemaakte API-key. Loobos ligt in een dennenbos op de Veluwe, een van de grootste natuurgebieden van Europa. Dennen zijn de dominante soort op de Veluwe. Loobos is dus representatief voor een veel groter areaal. De site werd voor het eerst opgericht in 1995 en was de thuisbasis van een van de drie eerste ecosysteemfluxlocaties ter wereld. In 2021 is er een nieuwe toren gebouwd en ingericht. Het onderzoek bij Loobos is gericht op het begrijpen van de rol van het ecosysteem in de koolstof- en watercyclus. Naarmate het bos, geplant in de jaren 1910, groeit, neemt het CO2 op uit de atmosfeer. Dit is een belangrijke feedback op de klimaatverandering. Maar de hoeveelheid opname hangt af van de beschikbaarheid van water, temperatuur, straling en luchtkwaliteit. Daarom is het een zeer dynamisch systeem, dat we proberen te begrijpen en te voorspellen. Het onderzoek wordt gedaan door MAQ aan Wageningen Universiteit met de Universiteit Utrecht en Delft als partners via het Ruisdael Observatorium. Bosonderzoek wordt ook door andere groepen in Wageningen gedaan, b.v. de GIS en Remote Sensing-groep verzamelt LIDAR-metingen van ecosysteemgeometrie. We verwelkomen andere experimentele groepen en campagnes. In 2021 wordt op de locatie een 36 meter hoge toren gebouwd, waarin wervelcovariantie-instrumenten (CO2, hitte, verdamping, vluchtige organische stoffen), stralingsinstrumenten, temperatuurprofielen, waterdamp, CO2 en windsnelheid worden gehuisvest. Rond de toren worden bodemtemperatuur-, vocht- en warmteflux- en watertafeldieptemetingen verzameld.</gmd:LocalisedCharacterString>
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            <gmd:LocalisedCharacterString locale="#DUT">De gemeten data worden als Open Access data aangeleverd via https://maq-observations.nl/. Deze meetlocatie maakt tevens deel uit van het Ruisdael Observatorium, een landelijk observatorium voor metingen van de atmosfeer.</gmd:LocalisedCharacterString>
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            </gmd:PT_FreeText>
          </gmd:keyword>
        </gmd:MD_Keywords>
      </gmd:descriptiveKeywords>
      <gmd:resourceConstraints>
        <gmd:MD_Constraints>
          <gmd:useLimitation xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>Please refer to our data license page: https://maq-observations.nl/maq-data-license/</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#EN">Please refer to our data license page: https://maq-observations.nl/maq-data-license/</gmd:LocalisedCharacterString>
              </gmd:textGroup>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#DUT">Meer info op onze data license pagina: https://maq-observations.nl/maq-data-license/</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:useLimitation>
        </gmd:MD_Constraints>
      </gmd:resourceConstraints>
      <gmd:resourceConstraints>
        <gmd:MD_LegalConstraints>
          <gmd:accessConstraints>
            <gmd:MD_RestrictionCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_RestrictionCode" codeListValue="otherRestrictions" />
          </gmd:accessConstraints>
          <gmd:otherConstraints xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>https://creativecommons.org/licenses/by/4.0/deed.nl</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#EN">https://creativecommons.org/licenses/by/4.0/deed.nl</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:otherConstraints>
        </gmd:MD_LegalConstraints>
      </gmd:resourceConstraints>
      <gmd:resourceConstraints>
        <gmd:MD_SecurityConstraints>
          <gmd:classification>
            <gmd:MD_ClassificationCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_ClassificationCode" codeListValue="unclassified" />
          </gmd:classification>
        </gmd:MD_SecurityConstraints>
      </gmd:resourceConstraints>
      <gmd:spatialRepresentationType>
        <gmd:MD_SpatialRepresentationTypeCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_SpatialRepresentationTypeCode" codeListValue="textTable" />
      </gmd:spatialRepresentationType>
      <gmd:spatialResolution>
        <gmd:MD_Resolution>
          <gmd:equivalentScale>
            <gmd:MD_RepresentativeFraction>
              <gmd:denominator>
                <gco:Integer>1</gco:Integer>
              </gmd:denominator>
            </gmd:MD_RepresentativeFraction>
          </gmd:equivalentScale>
        </gmd:MD_Resolution>
      </gmd:spatialResolution>
      <gmd:language>
        <gmd:LanguageCode codeList="http://www.loc.gov/standards/iso639-2/" codeListValue="eng" />
      </gmd:language>
      <gmd:characterSet>
        <gmd:MD_CharacterSetCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_CharacterSetCode" codeListValue="utf8" />
      </gmd:characterSet>
      <gmd:topicCategory>
        <gmd:MD_TopicCategoryCode>climatologyMeteorologyAtmosphere</gmd:MD_TopicCategoryCode>
      </gmd:topicCategory>
      <gmd:extent>
        <gmd:EX_Extent>
          <gmd:geographicElement>
            <gmd:EX_GeographicBoundingBox>
              <gmd:westBoundLongitude>
                <gco:Decimal>5.743575</gco:Decimal>
              </gmd:westBoundLongitude>
              <gmd:eastBoundLongitude>
                <gco:Decimal>5.743575</gco:Decimal>
              </gmd:eastBoundLongitude>
              <gmd:southBoundLatitude>
                <gco:Decimal>52.166446</gco:Decimal>
              </gmd:southBoundLatitude>
              <gmd:northBoundLatitude>
                <gco:Decimal>52.166446</gco:Decimal>
              </gmd:northBoundLatitude>
            </gmd:EX_GeographicBoundingBox>
          </gmd:geographicElement>
          <gmd:temporalElement>
            <gmd:EX_TemporalExtent>
              <gmd:extent>
                <gml:TimePeriod gml:id="d7669e433a1052958">
                  <gml:beginPosition>2022-01-21</gml:beginPosition>
                  <gml:endPosition>9999-12-31</gml:endPosition>
                </gml:TimePeriod>
              </gmd:extent>
            </gmd:EX_TemporalExtent>
          </gmd:temporalElement>
        </gmd:EX_Extent>
      </gmd:extent>
    </gmd:MD_DataIdentification>
  </gmd:identificationInfo>
  <gmd:distributionInfo xmlns:gmx="http://schemas.opengis.net/iso/19139/20060504/gmx/gmx.xsd">
    <gmd:MD_Distribution>
      <gmd:distributionFormat>
        <gmd:MD_Format>
          <gmd:name xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>MySQL</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#EN">MySQL</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:name>
          <gmd:version>
            <gco:CharacterString>1.0</gco:CharacterString>
          </gmd:version>
          <gmd:specification gco:nilReason="missing">
            <gco:CharacterString />
          </gmd:specification>
        </gmd:MD_Format>
      </gmd:distributionFormat>
      <gmd:distributor>
        <gmd:MD_Distributor>
          <gmd:distributorContact>
            <gmd:CI_ResponsibleParty>
              <gmd:organisationName xsi:type="gmd:PT_FreeText_PropertyType">
                <gco:CharacterString>Koninklijk Nederlands Meteorologisch Instituut (KNMI)</gco:CharacterString>
                <gmd:PT_FreeText>
                  <gmd:textGroup>
                    <gmd:LocalisedCharacterString locale="#EN">Koninklijk Nederlands Meteorologisch Instituut (KNMI)</gmd:LocalisedCharacterString>
                  </gmd:textGroup>
                  <gmd:textGroup>
                    <gmd:LocalisedCharacterString locale="#DUT">Koninklijk Nederlands Meteorologisch Instituut (KNMI)</gmd:LocalisedCharacterString>
                  </gmd:textGroup>
                </gmd:PT_FreeText>
              </gmd:organisationName>
              <gmd:contactInfo>
                <gmd:CI_Contact>
                  <gmd:address>
                    <gmd:CI_Address>
                      <gmd:electronicMailAddress xsi:type="gmd:PT_FreeText_PropertyType">
                        <gco:CharacterString>opendata@knmi.nl</gco:CharacterString>
                        <gmd:PT_FreeText>
                          <gmd:textGroup>
                            <gmd:LocalisedCharacterString locale="#EN">opendata@knmi.nl</gmd:LocalisedCharacterString>
                          </gmd:textGroup>
                        </gmd:PT_FreeText>
                      </gmd:electronicMailAddress>
                    </gmd:CI_Address>
                  </gmd:address>
                </gmd:CI_Contact>
              </gmd:contactInfo>
              <gmd:role>
                <gmd:CI_RoleCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#CI_RoleCode" codeListValue="pointOfContact" />
              </gmd:role>
            </gmd:CI_ResponsibleParty>
          </gmd:distributorContact>
          <gmd:distributionOrderProcess>
            <gmd:MD_StandardOrderProcess>
              <gmd:orderingInstructions xsi:type="gmd:PT_FreeText_PropertyType">
                <gco:CharacterString>This dataset is an external dataset, which means the data cannot be retrieved via the KNMI Data Platform. The dataset can only be retrieved from an external website: https://maq-observations.nl/</gco:CharacterString>
                <gmd:PT_FreeText>
                  <gmd:textGroup>
                    <gmd:LocalisedCharacterString locale="#EN">This dataset is an external dataset, which means the data cannot be retrieved via the KNMI Data Platform. The dataset can only be retrieved from an external website: https://maq-observations.nl/</gmd:LocalisedCharacterString>
                  </gmd:textGroup>
                  <gmd:textGroup>
                    <gmd:LocalisedCharacterString locale="#DUT">Deze dataset is een externe dataset en kan niet gedownload worden via het KNMI Data Platform. De dataset kan gedownload worden via een externe website: https://maq-observations.nl/</gmd:LocalisedCharacterString>
                  </gmd:textGroup>
                </gmd:PT_FreeText>
              </gmd:orderingInstructions>
              <gmd:turnaround>
                <gco:CharacterString>minutes</gco:CharacterString>
              </gmd:turnaround>
            </gmd:MD_StandardOrderProcess>
          </gmd:distributionOrderProcess>
        </gmd:MD_Distributor>
      </gmd:distributor>
      <gmd:transferOptions>
        <gmd:MD_DigitalTransferOptions>
          <gmd:transferSize>
            <gco:Real>1026</gco:Real>
          </gmd:transferSize>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>https://dataplatform.knmi.nl/catalog/datasets/index.html?x-dataset=maq_observations_loobos&amp;x-dataset-version=1.0</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>landingpage</gco:CharacterString>
              </gmd:protocol>
              <gmd:name xsi:type="gmd:PT_FreeText_PropertyType">
                <gco:CharacterString>KNMI Data Platform</gco:CharacterString>
                <gmd:PT_FreeText>
                  <gmd:textGroup>
                    <gmd:LocalisedCharacterString locale="#EN">KNMI Data Platform</gmd:LocalisedCharacterString>
                  </gmd:textGroup>
                </gmd:PT_FreeText>
              </gmd:name>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
        </gmd:MD_DigitalTransferOptions>
      </gmd:transferOptions>
    </gmd:MD_Distribution>
  </gmd:distributionInfo>
  <gmd:dataQualityInfo xmlns:gmx="http://schemas.opengis.net/iso/19139/20060504/gmx/gmx.xsd">
    <gmd:DQ_DataQuality>
      <gmd:scope>
        <gmd:DQ_Scope>
          <gmd:level>
            <gmd:MD_ScopeCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_ScopeCode" codeListValue="dataset" />
          </gmd:level>
        </gmd:DQ_Scope>
      </gmd:scope>
      <gmd:report>
        <gmd:DQ_CompletenessOmission>
          <gmd:result>
            <gmd:DQ_QuantitativeResult>
              <gmd:valueUnit />
              <gmd:value>
                <gco:Record xsi:type="gmd:PT_FreeText_PropertyType">
                  <gco:CharacterString>Exclusion of data may consist because, but does not limit itself to, broken equipment, power outages, untrustworthy data and maintanence.</gco:CharacterString>
                  <gmd:PT_FreeText>
                    <gmd:textGroup>
                      <gmd:LocalisedCharacterString locale="#EN">Exclusion of data may consist because, but does not limit itself to, broken equipment, power outages, untrustworthy data and maintanence.</gmd:LocalisedCharacterString>
                    </gmd:textGroup>
                    <gmd:textGroup>
                      <gmd:LocalisedCharacterString locale="#DUT">Uitsluiting van gegevens kan bestaan ​​uit, maar beperkt zich niet tot, kapotte apparatuur, stroomstoringen, onbetrouwbare gegevens en onderhoud.</gmd:LocalisedCharacterString>
                    </gmd:textGroup>
                  </gmd:PT_FreeText>
                </gco:Record>
              </gmd:value>
            </gmd:DQ_QuantitativeResult>
          </gmd:result>
        </gmd:DQ_CompletenessOmission>
      </gmd:report>
      <gmd:lineage>
        <gmd:LI_Lineage>
          <gmd:statement xsi:type="gmd:PT_FreeText_PropertyType">
            <gco:CharacterString>The source data in the SQL database originates from various sensors. We post-process and quality control the collected data using Python scripts before sending to the SQL database. Near real-time data is submitted every 10 minutes. The data is available at a temporal resolution of up to 20 seconds. Data collection is fully automated and quality-controlled before sending to our database.</gco:CharacterString>
            <gmd:PT_FreeText>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#EN">The source data in the SQL database originates from various sensors. We post-process and quality control the collected data using Python scripts before sending to the SQL database. Near real-time data is submitted every 10 minutes. The data is available at a temporal resolution of up to 20 seconds. Data collection is fully automated and quality-controlled before sending to our database.</gmd:LocalisedCharacterString>
              </gmd:textGroup>
              <gmd:textGroup>
                <gmd:LocalisedCharacterString locale="#DUT">De brongegevens in de SQL-database zijn afkomstig van verschillende sensoren. We verwerken en controleren de verzamelde gegevens met behulp van Python-scripts voordat ze naar de SQL-database worden verzonden. Near real-time gegevens worden elke 10 minuten verzonden. De data is beschikbaar op een tijdsresolutie van tot wel 20 seconden. Het verzamelen van gegevens is volledig geautomatiseerd en is quality controlled voordat het naar onze database wordt verzonden.</gmd:LocalisedCharacterString>
              </gmd:textGroup>
            </gmd:PT_FreeText>
          </gmd:statement>
        </gmd:LI_Lineage>
      </gmd:lineage>
    </gmd:DQ_DataQuality>
  </gmd:dataQualityInfo>
</gmd:MD_Metadata>

