<?xml version="1.0" encoding="UTF-8"?><!--*** Generated from internal PANGAEA metadata schema by dif.xslt ***--><DIF xsi:schemaLocation="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/ http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/dif_v9.4.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/">
<Entry_ID>PANGAEA_997018</Entry_ID>
<Entry_Title>GEM-2 total ice thickness estimates co-located with MagnaProbe snow and melt pond depth measurements of station PS149_36-1 during the PS149 CONTRASTS expedition (July-August 2025)</Entry_Title>
<Data_Set_Citation>
<Dataset_Creator>Ringel, Maximilian Harald; Spreen, Gunnar; Krumpen, Thomas; Neudert, Mara</Dataset_Creator>
<Dataset_Title>GEM-2 total ice thickness estimates co-located with MagnaProbe snow and melt pond depth measurements of station PS149_36-1 during the PS149 CONTRASTS expedition (July-August 2025)</Dataset_Title>
<Dataset_Release_Date>2026-09-02</Dataset_Release_Date>
<Dataset_Publisher>PANGAEA</Dataset_Publisher>
<Data_Presentation_Form>Dataset</Data_Presentation_Form>
<Online_Resource>https://doi.pangaea.de/10.1594/PANGAEA.997018</Online_Resource>
</Data_Set_Citation>
<Personnel>
<Role>Investigator</Role>
<First_Name>Maximilian Harald</First_Name>
<Last_Name>Ringel</Last_Name>
<Email>mringel@uni-bremen.de</Email>
</Personnel>
<Discipline>
<Discipline_Name>Earth Science</Discipline_Name>
</Discipline>
<Parameters>
<Detailed_Variable>DATE/TIME</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>LONGITUDE</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>LATITUDE</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Easting, Antarctic Polar Stereographic (EPSG:3031)</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Northing, Antarctic Polar Stereographic (EPSG:3031)</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Snow depth</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Melt pond depth</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Distance</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Number of observations</Detailed_Variable>
</Parameters>
<Parameters>
<Detailed_Variable>Sea ice and snow thickness</Detailed_Variable>
</Parameters>
<ISO_Topic_Category>geoscientificInformation</ISO_Topic_Category>
<Keyword>Arctic</Keyword>
<Keyword>Broadband electromagnetic sensor</Keyword>
<Keyword>co-located</Keyword>
<Keyword>CONTRASTS expedition</Keyword>
<Keyword>File 111</Keyword>
<Keyword>GEM-2</Keyword>
<Keyword>Ice station</Keyword>
<Keyword>Ice Station 2c</Keyword>
<Keyword>magnaprobe</Keyword>
<Keyword>Magnaprobe</Keyword>
<Keyword>melt pond depth</Keyword>
<Keyword>ocean</Keyword>
<Keyword>PS149</Keyword>
<Keyword>PS149_36-1</Keyword>
<Keyword>PS149_36-1-gem2-730-iup-04</Keyword>
<Keyword>PS149_36-1-magnaprobe-anja-03</Keyword>
<Keyword>RV Polarstern</Keyword>
<Keyword>Sea ice</Keyword>
<Keyword>Sea ice thickness</Keyword>
<Keyword>snow depth</Keyword>
<Sensor_Name>
<Long_Name>Magnaprobe</Long_Name>
</Sensor_Name>
<Sensor_Name>
<Long_Name>Ground-based Electromagnetic Induction Sounding Device, GEM-2, Geophex Ltd</Long_Name>
</Sensor_Name>
<Source_Name>
<Long_Name>Polarstern</Long_Name>
</Source_Name>
<Temporal_Coverage>
<Start_Date>2025-08-13</Start_Date>
<Stop_Date>2025-08-13</Stop_Date>
</Temporal_Coverage>
<Data_Set_Progress>Complete</Data_Set_Progress>
<Spatial_Coverage>
<Southernmost_Latitude>84.50501033958491</Southernmost_Latitude>
<Northernmost_Latitude>84.51259472479292</Northernmost_Latitude>
<Westernmost_Longitude>22.0406542152708</Westernmost_Longitude>
<Easternmost_Longitude>22.116233664363854</Easternmost_Longitude>
</Spatial_Coverage>
<Project>
<Short_Name>AC3</Short_Name>
<Long_Name>Arctic Amplification</Long_Name>
</Project>
<Access_Constraints>unrestricted</Access_Constraints>
<Use_Constraints>CC-BY-4.0: Creative Commons Attribution 4.0 International</Use_Constraints>
<Data_Set_Language>English</Data_Set_Language>
<Data_Center>
<Data_Center_Name>
<Short_Name>PANGAEA</Short_Name>
<Long_Name>Data Publisher for Earth &amp; Environmental Science</Long_Name>
</Data_Center_Name>
<Data_Center_URL>https://www.pangaea.de/</Data_Center_URL>
<Personnel>
<Role>Data Center Contact</Role>
<First_Name>Michael</First_Name>
<Last_Name>Diepenbroek</Last_Name>
<Email>info@pangaea.de</Email>
<Contact_Address>
<Address>Leobener Str.</Address>
<City>Bremen</City>
<Province_or_State>Bremen</Province_or_State>
<Postal_Code>28359</Postal_Code>
<Country>Germany</Country>
</Contact_Address>
</Personnel>
</Data_Center>
<Distribution>
<Distribution_Media>online</Distribution_Media>
<Distribution_Size>13172 data points</Distribution_Size>
<Distribution_Format>text/tab-separated-values</Distribution_Format>
</Distribution>
<Reference>Nicolaus, Marcel (2026): The Expedition PS149 of the Research Vessel POLARSTERN to the Arctic Ocean in 2025. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 808, 382 pp, https://doi.org/10.57738/BZPM_0808_2026</Reference>
<Summary>This dataset contains measurements of snow/SSL (surface scattering layer) depth or melt pond depth co-located with total ice thickness estimates from a walk across the ice floe (called long transect) conducted during the ice station indicated in the title during the PS149 CONTRASTS expedition. The transect was marked with flags at its corner points to ensure that a similar track was measured during repeated visits to the ice floe. A GPS-equipped MagnaProbe was used to measure snow/SSL and melt pond depth, while a Geophex Ltd. GEM-2-730 instrument was used to measure total sea ice thickness. Total sea ice thickness refers to the distance between the instrument and the ice–ocean interface. Accordingly, if present, snow/SSL or melt pond depth must be subtracted from this total thickness to obtain the actual sea ice thickness estimate. More detailed explanations about the data processing and the co-location of both measurements can be found in the comment section of the dataset collection: doi:10.1594/PANGAEA.996908. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.997018"!</Summary>
<Related_URL>
<URL>http://commons.wikimedia.org/w/index.php?title=Image:Ice-floe_params_hg.png</URL>
<Description>Melt pond depth</Description>
</Related_URL>
<Related_URL>
<URL>http://en.wikipedia.org/wiki/ISO_6709</URL>
<Description>LATITUDE</Description>
</Related_URL>
<Related_URL>
<URL>http://en.wikipedia.org/wiki/ISO_6709</URL>
<Description>LONGITUDE</Description>
</Related_URL>
<Related_URL>
<URL>http://en.wikipedia.org/wiki/ISO_8601</URL>
<Description>DATE/TIME</Description>
</Related_URL>
<Related_URL>
<URL>https://doi.org/10.17815/jlsrf-3-163</URL>
<Description>Polarstern</Description>
</Related_URL>
<Related_URL>
<URL>https://doi.org/10.57738/BZPM_0808_2026</URL>
<Description>The Expedition PS149 of the Research Vessel POLARSTERN to the Arctic Ocean in 2025</Description>
</Related_URL>
<Related_URL>
<URL>https://gepris.dfg.de/project/268020496</URL>
<Description>AC3</Description>
</Related_URL>
<Parent_DIF>PANGAEA_996908</Parent_DIF>
<Metadata_Name>DIF</Metadata_Name>
<Metadata_Version>9.4</Metadata_Version>
<DIF_Creation_Date>2026-09-02</DIF_Creation_Date>
<Last_DIF_Revision_Date>2026-09-02</Last_DIF_Revision_Date>
</DIF>
