<?xml version="1.0" encoding="UTF-8"?><md:MetaData xmlns:md="http://www.pangaea.de/MetaData" version="2026-04-13">
<md:citation id="dataset995119">
<md:author id="dataset.author23609">
<md:lastName>Zachek</md:lastName>
<md:firstName>Andrey</md:firstName>
<md:orcid>0009-0008-6705-5627</md:orcid>
</md:author>
<md:year>2026</md:year>
<md:title>Meteorological and radiation measurements during the North Pole 28 (NP-28) drifting station, 1987 - Standardized fixed-hour short-wave actinometric observations</md:title>
<md:type id="dataset.reftype10" includeInCitation="true">dataset</md:type>
<md:URI>https://doi.org/10.1594/PANGAEA.995119</md:URI>
<md:dateTime>2026-05-22T10:05:22</md:dateTime>
</md:citation>
<md:abstract>This dataset provides meteorological and actinometric observations from the Soviet drifting station North Pole 28 (NP-28) in the Central Arctic, 1987. Experimental studies were carried out at the drifting station, which operated in the Central Arctic Basin from February to October 1987. It includes air and surface temperatures, humidity, pressure, wind data, and cloud cover. The radiation data (see https://doi.pangaea.de/10.1594/PANGAEA.995120) covers hourly averages of long-wave (upward/downward) and short-wave global radiation, as well as fixed-hour solar radiation measurements (direct, diffuse, and reflected).</md:abstract>
<md:reference dataciteRelType="IsSupplementTo" group="200" id="ref139995" relationType="Supplement to" relationTypeId="5">
<md:author id="ref139995.author23609">
<md:lastName>Zachek</md:lastName>
<md:firstName>Andrey</md:firstName>
<md:orcid>0009-0008-6705-5627</md:orcid>
</md:author>
<md:author id="ref139995.author117628">
<md:lastName>Yurganov</md:lastName>
<md:firstName>Leonid</md:firstName>
</md:author>
<md:year>2026</md:year>
<md:title>Longwave Radiation Variability in the Arctic: Forty Years of Change Under Reducing Global Anthropogenic SO2 Emissions</md:title>
<md:type id="ref139995.reftype1">journal article</md:type>
<md:source id="ref139995.journal16863" type="journal">Atmosphere</md:source>
<md:volume>17(5)</md:volume>
<md:URI>https://doi.org/10.3390/atmos17050513</md:URI>
<md:pages>513</md:pages>
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<md:lastName>Zachek</md:lastName>
<md:firstName>Andrey</md:firstName>
<md:orcid>0009-0008-6705-5627</md:orcid>
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<md:year>2026</md:year>
<md:title>Meteorological and radiation measurements during the North Pole 28 (NP-28) drifting station, 1987 - Standard meteorological measurements</md:title>
<md:type id="refds995120.reftype10" includeInCitation="true">dataset</md:type>
<md:URI>https://doi.org/10.1594/PANGAEA.995120</md:URI>
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<md:extent>
<md:geographic>
<md:westBoundLongitude>148.54</md:westBoundLongitude>
<md:eastBoundLongitude>170.0</md:eastBoundLongitude>
<md:southBoundLatitude>81.06</md:southBoundLatitude>
<md:northBoundLatitude>85.3</md:northBoundLatitude>
<md:meanLongitude>164.1045081967207</md:meanLongitude>
<md:meanLatitude>82.97827868852475</md:meanLatitude>
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<md:temporal>
<md:minDateTime>1987-03-01T00:00:00</md:minDateTime>
<md:maxDateTime>1987-09-30T00:00:00</md:maxDateTime>
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</md:extent>
<md:event displayTypeName="Event" id="event3407683" typeName="Generic Event">
<md:label>NorthPole_SP-28</md:label>
<md:latitude>81.18</md:latitude>
<md:longitude>169.42</md:longitude>
<md:dateTime>1987-01-01T00:00:00</md:dateTime>
<md:latitude2>86.24</md:latitude2>
<md:longitude2>172.3</md:longitude2>
<md:dateTime2>1987-12-31T00:00:00</md:dateTime2>
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<md:name>Drifting Station SP-28</md:name>
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<md:size unit="data points">7808</md:size>
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<md:label>CC-BY-4.0</md:label>
<md:name>Creative Commons Attribution 4.0 International</md:name>
<md:URI>https://creativecommons.org/licenses/by/4.0/</md:URI>
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<md:firstName>Andrey</md:firstName>
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<md:comment>True solar time</md:comment>
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<md:shortName>Latitude</md:shortName>
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<md:lastName>Zachek</md:lastName>
<md:firstName>Andrey</md:firstName>
<md:orcid>0009-0008-6705-5627</md:orcid>
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<md:caption>Longitude</md:caption>
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<md:matrixColumn col="4" format="0.0" id="col4.ds15932151" source="data" type="numeric">
<md:parameter id="col4.ds15932151.param48820">
<md:name>Air temperature at 2 m height</md:name>
<md:shortName>T2</md:shortName>
<md:unit>°C</md:unit>
<md:term id="col4.ds15932151.param48820.term43972" semanticURI="http://qudt.org/1.1/vocab/quantity#ThermodynamicTemperature" terminologyId="13" terminologyLabel="PAN-Quantity">
<md:name>Temperature</md:name>
<md:optionalName>Θ</md:optionalName>
<md:URI>http://dbpedia.org/resource/Temperature</md:URI>
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<md:method id="col4.ds15932151.method19152">
<md:name>Thermometer, JSC "Termopribor", TM-4-1</md:name>
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<md:PI id="col4.ds15932151.pi23609">
<md:lastName>Zachek</md:lastName>
<md:firstName>Andrey</md:firstName>
<md:orcid>0009-0008-6705-5627</md:orcid>
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<md:comment>instantaneous value</md:comment>
<md:caption>T2 [°C]</md:caption>
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<md:matrixColumn col="5" format="0" id="col5.ds15932152" source="data" type="numeric">
<md:parameter id="col5.ds15932152.param45294">
<md:name>Direct radiation</md:name>
<md:shortName>DIR</md:shortName>
<md:unit>W/m**2</md:unit>
<md:term id="col5.ds15932152.param45294.term43923" semanticURI="http://qudt.org/1.1/vocab/quantity#PowerPerArea" terminologyId="13" terminologyLabel="PAN-Quantity">
<md:name>Power per Area</md:name>
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<md:method id="col5.ds15932152.method19150">
<md:name>Actinometer, Yanishevsky, AT-50</md:name>
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<md:PI id="col5.ds15932152.pi23609">
<md:lastName>Zachek</md:lastName>
<md:firstName>Andrey</md:firstName>
<md:orcid>0009-0008-6705-5627</md:orcid>
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<md:comment>instantaneous value</md:comment>
<md:caption>DIR [W/m**2]</md:caption>
</md:matrixColumn>
<md:matrixColumn col="6" format="0" id="col6.ds15932153" source="data" type="numeric">
<md:parameter id="col6.ds15932153.param31460">
<md:name>Short-wave downward (GLOBAL) radiation</md:name>
<md:shortName>SWD</md:shortName>
<md:unit>W/m**2</md:unit>
<md:term endOffset="19" fragment="1" id="col6.ds15932153.param31460.term48981" startOffset="11" terminologyId="18" terminologyLabel="PAN-MicroBio">
<md:name>downward</md:name>
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<md:term id="col6.ds15932153.param31460.term43923" semanticURI="http://qudt.org/1.1/vocab/quantity#PowerPerArea" terminologyId="13" terminologyLabel="PAN-Quantity">
<md:name>Power per Area</md:name>
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<md:method id="col6.ds15932153.method19151">
<md:name>Pyranometer, Yanishevsky, M-80</md:name>
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<md:PI id="col6.ds15932153.pi23609">
<md:lastName>Zachek</md:lastName>
<md:firstName>Andrey</md:firstName>
<md:orcid>0009-0008-6705-5627</md:orcid>
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<md:comment>instantaneous value</md:comment>
<md:caption>SWD [W/m**2]</md:caption>
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<md:matrixColumn col="7" format="0" id="col7.ds15932154" source="data" type="numeric">
<md:parameter id="col7.ds15932154.param45293">
<md:name>Diffuse radiation</md:name>
<md:shortName>DIF</md:shortName>
<md:unit>W/m**2</md:unit>
<md:term id="col7.ds15932154.param45293.term43923" semanticURI="http://qudt.org/1.1/vocab/quantity#PowerPerArea" terminologyId="13" terminologyLabel="PAN-Quantity">
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<md:method id="col7.ds15932154.method19151">
<md:name>Pyranometer, Yanishevsky, M-80</md:name>
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<md:lastName>Zachek</md:lastName>
<md:firstName>Andrey</md:firstName>
<md:orcid>0009-0008-6705-5627</md:orcid>
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<md:comment>instantaneous value</md:comment>
<md:caption>DIF [W/m**2]</md:caption>
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<md:parameter id="col8.ds15932155.param55911">
<md:name>Short-wave upward (REFLEX) radiation</md:name>
<md:shortName>SWU</md:shortName>
<md:unit>W/m**2</md:unit>
<md:term endOffset="17" fragment="1" id="col8.ds15932155.param55911.term44358" startOffset="11" terminologyId="18" terminologyLabel="PAN-MicroBio">
<md:name>upward</md:name>
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<md:term id="col8.ds15932155.param55911.term43923" semanticURI="http://qudt.org/1.1/vocab/quantity#PowerPerArea" terminologyId="13" terminologyLabel="PAN-Quantity">
<md:name>Power per Area</md:name>
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<md:method id="col8.ds15932155.method19151">
<md:name>Pyranometer, Yanishevsky, M-80</md:name>
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<md:PI id="col8.ds15932155.pi23609">
<md:lastName>Zachek</md:lastName>
<md:firstName>Andrey</md:firstName>
<md:orcid>0009-0008-6705-5627</md:orcid>
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<md:comment>instantaneous value</md:comment>
<md:caption>SWU [W/m**2]</md:caption>
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<md:matrixColumn col="9" format="0" id="col9.ds15932156" source="data" type="numeric">
<md:parameter id="col9.ds15932156.param95548">
<md:name>Total cloud amount</md:name>
<md:shortName>N</md:shortName>
<md:unit>tenths</md:unit>
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<md:name>Visual observation</md:name>
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<md:PI id="col9.ds15932156.pi23609">
<md:lastName>Zachek</md:lastName>
<md:firstName>Andrey</md:firstName>
<md:orcid>0009-0008-6705-5627</md:orcid>
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<md:comment>instantaneous value</md:comment>
<md:caption>N [tenths]</md:caption>
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<md:name>Low cloud amount</md:name>
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<md:lastName>Zachek</md:lastName>
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<md:comment>instantaneous value</md:comment>
<md:caption>Nl [tenths]</md:caption>
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