<?xml version="1.0" encoding="UTF-8"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-05-14T10:39:03Z</responseDate><request identifier="NSIDC-0756.003" metadataPrefix="dif" verb="GetRecord">http://nsidc.org/api/dataset/metadata/oai</request><GetRecord><record><header><identifier>oai:nsidc.org/NSIDC-0756.003</identifier><datestamp>2026-05-05T20:15:49Z</datestamp><setSpec>cumulus</setSpec><setSpec>retired</setSpec><setSpec>nasa_nsidc_daac</setSpec></header><metadata>
<DIF xmlns="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/ http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/dif_v9.7.1.xsd"><Entry_ID>NSIDC-0756.003</Entry_ID><Entry_Title>MEaSUREs BedMachine Antarctica</Entry_Title><Data_Set_Citation><Dataset_Creator>Morlighem, M.</Dataset_Creator><Dataset_Title>MEaSUREs BedMachine Antarctica</Dataset_Title><Dataset_Release_Date>2022-10-19</Dataset_Release_Date><Dataset_Release_Place>Boulder, Colorado USA</Dataset_Release_Place><Dataset_Publisher>NASA NSIDC DAAC: NASA National Snow and Ice Data Center Distributed Active Archive Center</Dataset_Publisher><Version>3</Version><Other_Citation_Details><Invert_Citation_Order>false</Invert_Citation_Order></Other_Citation_Details><Dataset_DOI>10.5067/FPSU0V1MWUB6</Dataset_DOI><Online_Resource>https://nsidc.org/sites/default/files/documents/user-guide/nsidc-0756-v003-userguide.pdf</Online_Resource><Dataset_Series_Name>NSIDC-0756</Dataset_Series_Name></Data_Set_Citation><Reference><Author>Morlighem, M., Rignot, E., Binder, T., Blankenship, D. D., Drews, R., Eagles, G., Eisen, O., Ferraccioli, F., Forsberg, R., Fretwell, P., Goel, V., Greenbaum, J. S., Gudmundsson, H., Guo, J., Helm, V., Hofstede, C., Howat, I., Humbert, A., Jokat, W., Karlsson, N. B., Lee, W., Matsuoka, K., Millan, R., Mouginot, J., Paden, J., Pattyn, F., Roberts, J. L., Rosier, S., Ruppel, A., Seroussi, H., Smith, E. C., Steinhage, D., Sun, B., van den Broeke, M. R., van Ommen, T., van Wessem, M. &amp; Young, D. A.</Author><Publication_Date>2020</Publication_Date><Title>Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet</Title><Series>Nature Geoscience</Series><Volume>13</Volume><Pages>132-137</Pages><DOI>&lt;a href="https://doi.org/10.1038/s41561-019-0510-8"&gt;https://doi.org/10.1038/s41561-019-0510-8&lt;/a&gt;</DOI><Other_Reference_Details><Type>Literature Citation</Type></Other_Reference_Details></Reference><Personnel><Role>Technical Contact</Role><First_Name>NSIDC</First_Name><Last_Name>User Services</Last_Name><Email>nsidc@nsidc.org</Email><Phone>1-303-492-6199</Phone><Fax>1-303-492-2468</Fax><Contact_Address><Address>CIRES, 449 UCB</Address><Address>University of Colorado</Address><City>Boulder</City><Province_or_State>CO</Province_or_State><Postal_Code>80309-0449</Postal_Code><Country>USA</Country></Contact_Address></Personnel><Personnel><Role>Investigator</Role><First_Name>Mathieu</First_Name><Last_Name>Morlighem</Last_Name><Contact_Address><Country/></Contact_Address></Personnel><Parameters><Category>EARTH SCIENCE</Category><Topic>OCEANS</Topic><Term>BATHYMETRY/SEAFLOOR TOPOGRAPHY</Term><Variable_Level_1>BATHYMETRY</Variable_Level_1><Variable_Level_2> </Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable> </Detailed_Variable></Parameters><Parameters><Category>EARTH SCIENCE</Category><Topic>LAND SURFACE</Topic><Term>TOPOGRAPHY</Term><Variable_Level_1>TERRAIN ELEVATION</Variable_Level_1><Variable_Level_2>BED ELEVATION</Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable> </Detailed_Variable></Parameters><Parameters><Category>EARTH SCIENCE</Category><Topic>CRYOSPHERE</Topic><Term>GLACIERS/ICE SHEETS</Term><Variable_Level_1>FIRN</Variable_Level_1><Variable_Level_2>FIRN AIR CONTENT</Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable> </Detailed_Variable></Parameters><Parameters><Category>EARTH SCIENCE</Category><Topic>CLIMATE INDICATORS</Topic><Term>CRYOSPHERIC INDICATORS</Term><Variable_Level_1>GLACIAL MEASUREMENTS</Variable_Level_1><Variable_Level_2>GLACIER/ICE SHEET THICKNESS</Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable> </Detailed_Variable></Parameters><Parameters><Category>EARTH SCIENCE</Category><Topic>LAND SURFACE</Topic><Term>TOPOGRAPHY</Term><Variable_Level_1>TERRAIN ELEVATION</Variable_Level_1><Variable_Level_2> </Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable> </Detailed_Variable></Parameters><ISO_Topic_Category>Elevation</ISO_Topic_Category><ISO_Topic_Category>Geoscientific Information</ISO_Topic_Category><Keyword>AIV-project</Keyword><Keyword>Antarctica</Keyword><Keyword>Antarctic Ice Sheet</Keyword><Keyword>bed elevations</Keyword><Keyword>Bedrock Elevation</Keyword><Keyword>Bedrock Topography</Keyword><Keyword>Ice Thickness</Keyword><Keyword>MEaSUREs-project</Keyword><Sensor_Name><Short_Name>NOT APPLICABLE</Short_Name></Sensor_Name><Source_Name><Short_Name>MODELS</Short_Name><Long_Name>MODELS</Long_Name></Source_Name><Temporal_Coverage><Start_Date>1970-01-01</Start_Date><Stop_Date>2019-10-01</Stop_Date></Temporal_Coverage><Data_Set_Progress>deprecated</Data_Set_Progress><Spatial_Coverage><Southernmost_Latitude>-90</Southernmost_Latitude><Northernmost_Latitude>-53</Northernmost_Latitude><Westernmost_Longitude>-180</Westernmost_Longitude><Easternmost_Longitude>180</Easternmost_Longitude></Spatial_Coverage><Location><Location_Category>CONTINENT</Location_Category><Location_Type>ANTARCTICA</Location_Type></Location><Data_Resolution><Latitude_Resolution>500 m</Latitude_Resolution><Longitude_Resolution>500 m</Longitude_Resolution><Vertical_Resolution>Not applicable</Vertical_Resolution><Temporal_Resolution>Not applicable</Temporal_Resolution></Data_Resolution><Access_Constraints>These data have been retired and are no longer accessible. However, a more recent version may be available.</Access_Constraints><Use_Constraints>These data have been retired and are no longer accessible. However, a more recent version of may be available. Cite any prior or planned use of these data according to the recommended citation at&#xA0;https://nsidc.org/about/data-use-and-copyright. For more information on the NASA EOSDIS Data Use Policy, see https://earthdata.nasa.gov/earth-observation-data/data-use-policy.</Use_Constraints><Data_Set_Language>English</Data_Set_Language><Originating_Center>UC-IRVINE/PHYSSCI/ESS</Originating_Center><Data_Center><Data_Center_Name><Short_Name>NASA NSIDC DAAC</Short_Name><Long_Name>NASA National Snow and Ice Data Center Distributed Active Archive Center</Long_Name></Data_Center_Name><Data_Center_URL>https://nsidc.org/daac</Data_Center_URL><Personnel><Role>Data Center Contact</Role><First_Name>NSIDC</First_Name><Last_Name>User Services</Last_Name><Email>nsidc@nsidc.org</Email><Phone>1-303-492-6199</Phone><Contact_Address><Address>National Snow and Ice Data Center</Address><Address>CIRES, 449 UCB</Address><Address>University of Colorado</Address><City>Boulder</City><Province_or_State>CO</Province_or_State><Postal_Code>80309-0449</Postal_Code><Country>USA</Country></Contact_Address></Personnel></Data_Center><Distribution><Distribution_Media>HTTPS</Distribution_Media><Distribution_Format>netCDF-4</Distribution_Format></Distribution><Reference/><Summary><Abstract>This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program, contains a bed topography/bathymetry map of Antarctica based on mass conservation, streamline diffusion, and other methods. The data set also includes ice thickness, surface elevation, an ice/ocean/land mask, ice thickness estimation errors, and a map showing where each method was utilized.</Abstract></Summary><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>https://nsidc.org/sites/default/files/documents/user-guide/nsidc-0756-v003-userguide.pdf</URL><Description>MEaSUREs BedMachine Antarctica, Version 3 User Guide</Description></Related_URL><Metadata_Name>CEOS IDN DIF</Metadata_Name><Metadata_Version>VERSION 9.9</Metadata_Version><DIF_Creation_Date>2022-10-19</DIF_Creation_Date><Last_DIF_Revision_Date>2026-05-05</Last_DIF_Revision_Date><Extended_Metadata><Metadata><Group>NSIDC</Group><Name>Version Summary</Name><Value>Changes for Version 3 include:
&#x2022;	Added ice thickness measurements from CReSIS 2018, CReSIS 2019, and PASIN
&#x2022;	Updated thinning rates per Smith et al. (2020)
&#x2022;	Added parameter (&#x201C;dataid&#x201D;) to more easily identify data source
&#x2022;	Uses IBCSO v2 for ocean bathymetry</Value></Metadata><Metadata><Group>NSIDC</Group><Name>Minor Version</Name><Value/></Metadata><Metadata><Group>NSIDC</Group><Name>Spatial Reference Systems</Name><Value><Spatial_Reference_System><SRID>EPSG:3031</SRID><Description>WGS 84 / Antarctic Polar Stereographic</Description></Spatial_Reference_System></Value></Metadata><Metadata><Group>NSIDC</Group><Name>Level of Service</Name><Value><Level>No Data Access</Level></Value></Metadata><Metadata><Group>NSIDC</Group><Name>Full Dataset Citation</Name><Value>Morlighem, M. (2022). &lt;i&gt;MEaSUREs BedMachine Antarctica&lt;/i&gt;. (NSIDC-0756, Version 3). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. &lt;a href="https://doi.org/10.5067/FPSU0V1MWUB6"&gt;https://doi.org/10.5067/FPSU0V1MWUB6&lt;/a&gt;. [&lt;i&gt;&lt;describe subset used if applicable&gt;&lt;/i&gt;].</Value></Metadata><Metadata><Group>NSIDC</Group><Name>Retired</Name><Value>true</Value></Metadata></Extended_Metadata></DIF>
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