<?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>2026-06-14T01:56:23Z</responseDate><request identifier="G10006.001" metadataPrefix="dif" verb="GetRecord">http://nsidc.org/api/dataset/metadata/oai</request><GetRecord><record><header><identifier>oai:nsidc.org/G10006.001</identifier><datestamp>2025-12-04T15:17:13Z</datestamp><setSpec>v0_other</setSpec><setSpec>v0_all</setSpec><setSpec>noaa</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>G10006.001</Entry_ID><Entry_Title>Unified Sea Ice Thickness Climate Data Record, 1947 Onward</Entry_Title><Data_Set_Citation><Dataset_Creator>Lindsay, R. &amp; Schweiger, A. J.</Dataset_Creator><Dataset_Title>Unified Sea Ice Thickness Climate Data Record, 1947 Onward</Dataset_Title><Dataset_Release_Date>2013-11-13</Dataset_Release_Date><Dataset_Release_Place>Boulder, Colorado USA</Dataset_Release_Place><Dataset_Publisher>NSIDC: National Snow and Ice Data Center</Dataset_Publisher><Version>1</Version><Other_Citation_Details><Invert_Citation_Order>false</Invert_Citation_Order></Other_Citation_Details><Dataset_DOI>10.7265/N5D50JXV</Dataset_DOI><Online_Resource>https://dx.doi.org/10.7265/N5D50JXV</Online_Resource><Dataset_Series_Name>G10006</Dataset_Series_Name></Data_Set_Citation><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>Ron</First_Name><Last_Name>Lindsay</Last_Name><Email>lindsay@apl.washington.edu</Email><Contact_Address><Country/></Contact_Address></Personnel><Personnel><Role>Investigator</Role><First_Name>Axel</First_Name><Middle_Name>J.</Middle_Name><Last_Name>Schweiger</Last_Name><Email>axel@apl.washington.edu</Email><Phone>1-206-543-1312</Phone><Fax>1-206-543-3521</Fax><Contact_Address><Address>Applied Physics Laboratory</Address><Address>University of Washington</Address><Address>1013 NE 40th Street</Address><City>Seattle</City><Province_or_State>WA</Province_or_State><Postal_Code>98105-6698</Postal_Code><Country>USA</Country></Contact_Address></Personnel><Parameters><Category>EARTH SCIENCE</Category><Topic>Cryosphere</Topic><Term>Sea Ice</Term><Variable_Level_1>Ice Depth/Thickness</Variable_Level_1><Variable_Level_2> </Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable>ICE DEPTH/THICKNESS</Detailed_Variable></Parameters><Parameters><Category>EARTH SCIENCE</Category><Topic>Oceans</Topic><Term>Sea Ice</Term><Variable_Level_1>Ice Depth/Thickness</Variable_Level_1><Variable_Level_2> </Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable>ICE DEPTH/THICKNESS</Detailed_Variable></Parameters><Parameters><Category>EARTH SCIENCE</Category><Topic>Cryosphere</Topic><Term>Sea Ice</Term><Variable_Level_1> </Variable_Level_1><Variable_Level_2> </Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable>Ice Draft</Detailed_Variable></Parameters><Parameters><Category>EARTH SCIENCE</Category><Topic>Cryosphere</Topic><Term>Snow/Ice</Term><Variable_Level_1>Snow/Ice Temperature</Variable_Level_1><Variable_Level_2> </Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable>Snow Temperature</Detailed_Variable></Parameters><ISO_Topic_Category>Climatology/Meteorology/Atmosphere</ISO_Topic_Category><Keyword>ice-thickness</Keyword><Keyword>Sea Ice Prediction Network-project</Keyword><Keyword>SIPN ice thickness-project</Keyword><Keyword>SIPN-project</Keyword><Sensor_Name><Short_Name>AEM</Short_Name><Long_Name>Airborne Electromagnetic Profiler</Long_Name></Sensor_Name><Sensor_Name><Short_Name>GLAS</Short_Name><Long_Name>Geoscience Laser Altimeter System</Long_Name></Sensor_Name><Sensor_Name><Short_Name>LASERS</Short_Name><Long_Name>Light Amplification by Stimulated Emission of Radiation</Long_Name></Sensor_Name><Sensor_Name><Short_Name>UPWARD LOOKING SONAR</Short_Name></Sensor_Name><Source_Name><Short_Name>AIRCRAFT</Short_Name></Source_Name><Source_Name><Short_Name>ICESAT</Short_Name><Long_Name>Ice, Cloud, and land Elevation Satellite</Long_Name></Source_Name><Source_Name><Short_Name>MOORINGS</Short_Name></Source_Name><Temporal_Coverage><Start_Date>1947-01-01</Start_Date><Stop_Date>2017-01-01</Stop_Date></Temporal_Coverage><Data_Set_Progress>complete</Data_Set_Progress><Spatial_Coverage><Southernmost_Latitude>60</Southernmost_Latitude><Northernmost_Latitude>90</Northernmost_Latitude><Westernmost_Longitude>-180</Westernmost_Longitude><Easternmost_Longitude>180</Easternmost_Longitude></Spatial_Coverage><Spatial_Coverage><Southernmost_Latitude>-79</Southernmost_Latitude><Northernmost_Latitude>-55</Northernmost_Latitude><Westernmost_Longitude>-180</Westernmost_Longitude><Easternmost_Longitude>180</Easternmost_Longitude></Spatial_Coverage><Location><Location_Category>Ocean</Location_Category><Location_Type>Arctic Ocean</Location_Type><Location_Subregion1/><Location_Subregion2/><Location_Subregion3/></Location><Location><Location_Category>Ocean</Location_Category><Location_Type>Arctic Ocean</Location_Type><Location_Subregion1>Beaufort Sea</Location_Subregion1><Location_Subregion2/><Location_Subregion3/></Location><Location><Location_Category>Ocean</Location_Category><Location_Type>Arctic Ocean</Location_Type><Location_Subregion1>Chukchi Sea</Location_Subregion1><Location_Subregion2/><Location_Subregion3/></Location><Data_Resolution><Longitude_Resolution>50 km</Longitude_Resolution><Temporal_Resolution>1 month</Temporal_Resolution></Data_Resolution><Access_Constraints>These data are freely, openly, and fully accessible without restrictions.</Access_Constraints><Use_Constraints>These data are freely, openly, and fully available to use without restrictions, provided that you cite the data according to the recommended citation at https://nsidc.org/about/use_copyright.html.</Use_Constraints><Data_Set_Language>English</Data_Set_Language><Data_Center><Data_Center_Name><Short_Name>NOAA</Short_Name><Long_Name>National Oceanic and Atmospheric Administration</Long_Name></Data_Center_Name><Data_Center_URL>http://nsidc.org/noaa/</Data_Center_URL><Personnel><Role>Data Center Contact</Role><First_Name>NOAA</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>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>FTP</Distribution_Media><Distribution_Size>146 MB</Distribution_Size><Distribution_Format>ASCII</Distribution_Format></Distribution><Reference>Drucker, R., S. Martin, and R. Moritz. 2003. Observations of ice thickness and frazil ice in the St. Lawrence Island polynya from satellite imagery, upward looking sonar, and salinity/temperature moorings. J. Geophys. Res., 108 (C5): 18-1 - 18-18. doi:10.1029/2001JC001213.

Rothrock, D. A. and M. Wensnahan. 2007. The Accuracy of Sea Ice Drafts Measured from U.S. Navy Submarines. J. Atmos. Oceanic Technol. 24: 1936-1949. doi: http://dx.doi.org/10.1175/JTECH2097.1. 

National Snow and Ice Data Center. 1998, updated 2006. Submarine upward looking sonar ice draft profile data and statistics. Boulder, Colorado USA. doi: 10.7265/N54Q7RWK.

Wensnahan, M. and D. A. Rothrock. 2005. Sea-ice draft from submarine-based sonar: Establishing a consistent record from analog and digitally recorded data. Geophysical Research Letters 32(L11502). doi:10:1029/2005GL022507.

Tucker, W. B. III, J. W. Weatherly, D. T. Eppler, D. Farmer, and D. L. Bentley. 2001. Evidence for the rapid thinning of sea ice in the western Arctic Ocean at the end of the 1980s. Geophys. Res. Let. 28 (14): 2851-2854. 

Wadhams, P. and R. J. Horne. 1980. An analysis of ice profiles obtained by submarine in the Beaufort Sea. Journal of Glaciology 25: 401-424.

Wadhams, P. 1984. Arctic sea ice morphology and its measurement. Arctic Technology and Policy. I. Dyer and C. Chryssostomidis, eds., Washington, D.C., Hemisphere Publishing Corp.: 179-195.

Harms, S., Fahrbach, E., and Strass, V. 2001. Sea ice transports in the Weddell Sea. Journal of Geophysical Research 106 (C5): 9057-9073.

Witte, H. and E. Fahrbach. 2005. AWI Moored ULS Data, Greenland Sea and Fram Strait, 1991-2002. Boulder, Colorado USA: National Snow and Ice Data Center. doi: 10.7265/N5G15XSR. 

Haas, C., Lobach, J., Hendricks, S., Rabenstein, L., and Pfaffling, A. 2009. Helicopter-borne measurements of sea ice thickness, using a small and lightweight, digital EM system. Journal of Applied Geophysics 67(3): 234-241.

Pfaffling, A., Haas, C., and Reid, J. E. 2007. A direct helicopter EM sea ice thickness inversion, assessed with synthetic and field data. Geophysics 72: F127-F137. 

 Haas, C., Pfaffling, A., Hendricks, S., Rabenstein, L., Etienne, J.-L., and Rigor, I. 2008. Reduced ice thickness in Arctic Transpolar Drift favors rapid ice retreat. Geophys. Res. Lett. 35(L17501): 1-5. doi:10.1029/2008GL034457.

Haas, C., J. Lieser, J. Lobach, T. Martin, A. Pfaffling, S. Willmes, V. Alexandrov, and S. Kern. 2004. Sea ice remote sensing, thickness profiling, and ice and snow analyses, In The Expedition ARKTIS XIXl1 a, b and XIW2 of the Research Vessel POLARSTERN in 2003, U. Schauer and G. Kattner with contributions of the participants (Eds.). Rep. Pol. Mar. Res. 481: 13-46. 

Haas, C., S. Hendricks, and M. Doble. 2006. Comparison of the sea ice thickness distribution in the Lincoln Sea and adjacent Arctic Ocean in 2004 and 2005. Annals of glaciology 44: 247-252. 

Jennifer K. Hutchings. 2007. The Sea Ice Experiment: Dynamic Nature of the Arctic (SEDNA) Applied Physics Laboratory Ice Station (APLIS) 2007, Field Report PDF file Funding Agency: NSF.

Haas, C., S. Hendricks, H. Eicken, and A. Herber. 2010. Synoptic airborne thickness surveys reveal state of Arctic sea ice cover. Geophys. Res. Lett. 37(L09501). doi:10.1029/2010GL042652. 

Yi, Donghui, Jay Zwally. 2009. Arctic Sea Ice Freeboard and Thickness. [indicate subset used]. Boulder, Colorado USA: National Snow and Ice Data Center.

Zwally, H. J., D. Yi, R. Kwok, and Y. Zhao. 2008. ICESat Measurements of Sea Ice Freeboard and Estimates of Sea Ice Thickness in the Weddell Sea. Journal of Geophysical Research 113(C02S15). doi: 10.1029/2007JC004284. 

Pettipas, R., J. Hamilton, and S. Prinsenberg. 2008. Moored current meter and CTD observations from Barrow Strait, 2003-2004. Can. Data Rep. Hydrogr. Ocean Sci. 173 : vii, 134 p.

Prinsenberg, S. J. and R. Pettipas. 2008. Ice and ocean mooring data statistics from Barrow Strait, the central section of the NW Passage in the Canadian Arctic Archipelago. Int. J. Offshore Pol. Eng. 18(4): 277-281.

Prinsenberg, S. J., J. Hamilton, I. Peterson, and R. Pettipas. 2008. Observing and interpreting the seasonal variability of the oceanographic fluxes passing through Lancaster Sound of the Canadian Arctic Archipelago, In Influence of climate change on the changing Arctic and Sub-Arctic conditions, Springer Verlag, J. Nihoul and Prof. Andrey Kostianoy eds: 119-136. 

Kurtz, N., M. Studinger, J. Harbeck, Vincent-De-Paul Onana, and S. Farrell. 2012, updated to current year. IceBridge Sea Ice Freeboard, Snow Depth, and Thickness 2009-2011. Boulder, Colorado USA: NASA Distributed Active Archive Center at the National Snow and Ice Data Center. http://nsidc.org/data/idcsi2.html.

Kurtz, N. T., S. L. Farrell, M. Studinger, N. Galin, J. P. Harbeck, R. Lindsay, V. D. Onana, B. Panzer, and J. G. Sonntag. 2013. Sea ice thickness, freeboard, and snow depth products from Operation IceBridge airborne data. The Cryosphere 7: 1035-1056. doi:10.5194/tc-7-1035-2013.</Reference><Summary><Abstract>The Unified Sea Ice Thickness Climate Data Record, 1947 Onward is the result of a concerted effort to collect as many observations as possible of Arctic and Antarctic sea ice draft, freeboard, and thickness and to format them consistently with clear documentation, allowing the scientific community to better utilize what is now a considerable body of observations.</Abstract></Summary><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>https://dx.doi.org/10.7265/N5D50JXV</URL></Related_URL><Related_URL><URL_Content_Type><Type>GET DATA</Type></URL_Content_Type><URL>https://noaadata.apps.nsidc.org/NOAA/G10006/</URL><Description>HTTPS</Description></Related_URL><Metadata_Name>CEOS IDN DIF</Metadata_Name><Metadata_Version>VERSION 9.9</Metadata_Version><DIF_Creation_Date>2013-11-13</DIF_Creation_Date><Last_DIF_Revision_Date>2025-12-04</Last_DIF_Revision_Date><Extended_Metadata><Metadata><Group>NSIDC</Group><Name>Version Summary</Name><Value/></Metadata><Metadata><Group>NSIDC</Group><Name>Minor Version</Name><Value/></Metadata><Metadata><Group>NSIDC</Group><Name>Update Frequency</Name><Value>updated 2017</Value></Metadata><Metadata><Group>NSIDC</Group><Name>Current Version</Name><Value>1</Value></Metadata><Metadata><Group>NSIDC</Group><Name>Level of Service</Name><Value><Level>Standard</Level></Value></Metadata><Metadata><Group>NSIDC</Group><Name>Full Dataset Citation</Name><Value>Lindsay, R. &amp; Schweiger, A. J. (2013). &lt;i&gt;Unified Sea Ice Thickness Climate Data Record, 1947 Onward&lt;/i&gt;. (G10006, Version 1). [Data Set]. Boulder, Colorado USA. National Snow and Ice Data Center. &lt;a href="https://doi.org/10.7265/N5D50JXV"&gt;https://doi.org/10.7265/N5D50JXV&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>false</Value></Metadata><Metadata><Group>NSIDC</Group><Name>Related Services</Name><Value><umm-s><meta><format>application/vnd.nasa.cmr.umm+json</format><deleted>false</deleted><user-id>jroebuck</user-id><native-id>mmt_service_32962</native-id><concept-id>S2721063021-NSIDCV0</concept-id><provider-id>NSIDCV0</provider-id><revision-id>1</revision-id><concept-type>service</concept-type><revision-date>2023-06-27T14:22:11.750Z</revision-date></meta><umm><URL><URLValue>https://noaadata.apps.nsidc.org/</URLValue></URL><Name>NSIDCV0_NOAA_Data_HTTPS_File_System</Name><Type>NOT PROVIDED</Type><Version>1</Version><LongName>NOAA@NSIDC HTTPS File System</LongName><Description>Access and download NOAA@NSIDC data using a web browser, or through a command line utility such as WGET, or using programming languages such as R or Python.</Description><RelatedURLs><RelatedURL><URL>https://nsidc.org/data/user-resources/help-center/how-access-and-download-noaansidc-data</URL><Type>VIEW RELATED INFORMATION</Type><Description>NOAA@NSIDC HTTPS Access Guide</Description><URLContentType>PublicationURL</URLContentType></RelatedURL></RelatedURLs><ContactGroups><ContactGroup><Roles><Role>USER SERVICES</Role></Roles><GroupName>NSIDC User Services</GroupName><ContactInformation><ContactMechanisms><ContactMechanism><Type>Email</Type><Value>nsidc@nsidc.org</Value></ContactMechanism></ContactMechanisms></ContactInformation></ContactGroup></ContactGroups><ServiceKeywords><ServiceKeyword><ServiceTerm>DATA ACCESS/RETRIEVAL</ServiceTerm><ServiceTopic>DATA MANAGEMENT/DATA HANDLING</ServiceTopic><ServiceCategory>EARTH SCIENCE SERVICES</ServiceCategory></ServiceKeyword></ServiceKeywords><VersionDescription>This is the most current release of this service.</VersionDescription><ServiceOrganizations><ServiceOrganization><Roles><Role>AUTHOR</Role><Role>DEVELOPER</Role><Role>PUBLISHER</Role><Role>SERVICE PROVIDER</Role></Roles><LongName>National Oceanic and Atmospheric Administration at the National Snow and Ice Data Center</LongName><ShortName>NSIDC_NOAA</ShortName></ServiceOrganization></ServiceOrganizations><MetadataSpecification><URL>https://cdn.earthdata.nasa.gov/umm/service/v1.4</URL><Name>UMM-S</Name><Version>1.4</Version></MetadataSpecification></umm></umm-s><nsidc><URLValue>https://noaadata.apps.nsidc.org/NOAA/G10006/</URLValue></nsidc></Value></Metadata></Extended_Metadata></DIF>
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