<?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>2026-08-13T11:46:00Z</responseDate><request identifier="NSIDC-0611.003" metadataPrefix="dif" verb="GetRecord">http://nsidc.org/api/dataset/metadata/oai</request><GetRecord><record><header><identifier>oai:nsidc.org/NSIDC-0611.003</identifier><datestamp>2026-08-10T18:27:51Z</datestamp><setSpec>v0_daac</setSpec><setSpec>v0_all</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-0611.003</Entry_ID><Entry_Title>EASE-Grid Sea Ice Age</Entry_Title><Data_Set_Citation><Dataset_Creator>Tschudi, M., Fowler, C., Maslanik, J., Stewart, J. S. &amp; Meier, W. N.</Dataset_Creator><Dataset_Title>EASE-Grid Sea Ice Age</Dataset_Title><Dataset_Release_Date>2016-04-07</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/PFSVFZA9Y85G</Dataset_DOI><Online_Resource>https://nsidc.org/sites/default/files/nsidc-0611-v003-userguide_1.pdf</Online_Resource><Dataset_Series_Name>NSIDC-0611</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><Parameters><Category>EARTH SCIENCE</Category><Topic>CRYOSPHERE</Topic><Term>SEA ICE</Term><Variable_Level_1>SEA ICE AGE</Variable_Level_1><Variable_Level_2> </Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable> </Detailed_Variable></Parameters><ISO_Topic_Category>Climatology/Meteorology/Atmosphere</ISO_Topic_Category><Keyword>Sea Ice Age</Keyword><Sensor_Name><Short_Name>AVHRR</Short_Name><Long_Name>Advanced Very High Resolution Radiometer</Long_Name></Sensor_Name><Sensor_Name><Short_Name>DRIFTING BUOYS</Short_Name><Long_Name>DRIFTING BUOYS</Long_Name></Sensor_Name><Sensor_Name><Short_Name>SMMR</Short_Name><Long_Name>Scanning Multichannel Microwave Radiometer</Long_Name></Sensor_Name><Sensor_Name><Short_Name>SSM/I</Short_Name><Long_Name>Special Sensor Microwave/Imager</Long_Name></Sensor_Name><Sensor_Name><Short_Name>SSMIS</Short_Name><Long_Name>Special Sensor Microwave Imager/Sounder</Long_Name></Sensor_Name><Source_Name><Short_Name>BUOYS</Short_Name></Source_Name><Source_Name><Short_Name>DMSP 5D-2/F11</Short_Name><Long_Name>Defense Meteorological Satellite Program-F11</Long_Name></Source_Name><Source_Name><Short_Name>DMSP 5D-2/F13</Short_Name><Long_Name>Defense Meteorological Satellite Program-F13</Long_Name></Source_Name><Source_Name><Short_Name>DMSP 5D-2/F8</Short_Name><Long_Name>Defense Meteorological Satellite Program-F8</Long_Name></Source_Name><Source_Name><Short_Name>DMSP 5D-3/F17</Short_Name><Long_Name>Defense Meteorological Satellite Program-F17</Long_Name></Source_Name><Source_Name><Short_Name>NOAA-10</Short_Name><Long_Name>National Oceanic &amp; Atmospheric Administration-10</Long_Name></Source_Name><Source_Name><Short_Name>NOAA-11</Short_Name><Long_Name>National Oceanic &amp; Atmospheric Administration-11</Long_Name></Source_Name><Source_Name><Short_Name>NOAA-14</Short_Name><Long_Name>National Oceanic &amp; Atmospheric Administration-14</Long_Name></Source_Name><Source_Name><Short_Name>NOAA-16</Short_Name><Long_Name>National Oceanic &amp; Atmospheric Administration-16</Long_Name></Source_Name><Source_Name><Short_Name>NOAA-7</Short_Name><Long_Name>National Oceanic &amp; Atmospheric Administration-7</Long_Name></Source_Name><Source_Name><Short_Name>NOAA-9</Short_Name><Long_Name>National Oceanic &amp; Atmospheric Administration-9</Long_Name></Source_Name><Source_Name><Short_Name>Nimbus-7</Short_Name><Long_Name>Nimbus-7</Long_Name></Source_Name><Temporal_Coverage><Start_Date>1984-01-01</Start_Date><Stop_Date>2017-02-28</Stop_Date></Temporal_Coverage><Data_Set_Progress>deprecated</Data_Set_Progress><Spatial_Coverage><Southernmost_Latitude>48.4</Southernmost_Latitude><Northernmost_Latitude>90</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><Data_Resolution><Latitude_Resolution>12.5 km</Latitude_Resolution><Longitude_Resolution>12.5 km</Longitude_Resolution><Temporal_Resolution>7 day</Temporal_Resolution></Data_Resolution><Access_Constraints>These data have been retired and are no longer accessible, though a more recent version of these data may be available.</Access_Constraints><Use_Constraints>These data have been retired and are no longer available for use, though a more recent version of these data may be available. Cite any prior or planned use of these data according to the recommended citation at https://nsidc.org/about/data-use-and-copyright. For more information on the NASA ESDIS Data Use Guidance, see&#xA0;https://www.earthdata.nasa.gov/engage/open-data-services-software-policies/data-use-guidance.</Use_Constraints><Data_Set_Language>English</Data_Set_Language><Originating_Center>CU-Boulder/CCAR</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_Size>17 - 25 KB</Distribution_Size><Distribution_Format>PNG</Distribution_Format></Distribution><Distribution><Distribution_Media>HTTPS</Distribution_Media><Distribution_Size>501 KB</Distribution_Size><Distribution_Format>Binary</Distribution_Format></Distribution><Reference>Cavalieri, D. J., P. Gloersen, and W. J. Campbell. 1984. Determination of Sea Ice Parameters with the NIMBUS-7 SMMR. Journal of Geophysical Research 89(D4):5355-5369. doi: 10.1029/JD089iD04p05355.

Fowler, C., W. J. Emery, and J. Maslanik. 2004. Satellite-derived evolution of Arctic sea ice Age: October 1978 to March 2003. Geoscience and Remote Sensing Letters, IEEE, 1(2), 71-74. doi: 10.1109/LGRS.2004.824741.

Maslanik, J. A., C. Fowler, J. Stroeve, S. Drobot, J. Zwally, D. Yi and W. Emery. 2007. A younger, thinner Arctic ice cover: Increased potential for rapid, extensive sea-ice loss. Geophys. Res. Lett., 34(L24501). doi: 10.1029/2007GL032043.

Maslanik, J., J. Stroeve, C. Fowler, and W. Emery. 2011. Distribution and trends in Arctic sea ice age through spring 2011. Geophys. Res. Lett., 38(L13502). doi: 10.1029/2011GL047735.

Rigor, I.G., and J.M. Wallace, 2004. Variations in the age of Arctic sea-ice and summer sea-ice extent. Geophysical Research Letters 31: L09401. doi: 10.1029/2004GL019492.

Tschudi, M. A., Fowler, C, Maslanik, J. A., Stroeve, J. 2010. Tracking the movement and changing surface characteristics of Arctic sea ice. IEEE J. Selected Topics in Earth Obs. and Rem. Sens., 3(4). doi: 10.1109/JSTARS.2010.2048305.</Reference><Summary><Abstract>This data set provides weekly estimates of sea ice age for the Arctic Ocean from remotely sensed sea ice motion and sea ice extent.</Abstract></Summary><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>https://nsidc.org/sites/default/files/nsidc-0611-v003-userguide_1.pdf</URL><Description>EASE-Grid Sea Ice Age, Version 3 User Guide</Description></Related_URL><Metadata_Name>CEOS IDN DIF</Metadata_Name><Metadata_Version>VERSION 9.9</Metadata_Version><DIF_Creation_Date>2016-04-07</DIF_Creation_Date><Last_DIF_Revision_Date>2026-08-10</Last_DIF_Revision_Date><Extended_Metadata><Metadata><Group>NSIDC</Group><Name>Version Summary</Name><Value>The input ice motion data used for this data set is now derived from NSIDC-0116 Version 3 data.</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:3408</SRID><Description>NSIDC EASE-Grid North</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>Tschudi, M., Fowler, C., Maslanik, J., Stewart, J. S. &amp; Meier, W. N. (2016). &lt;i&gt;EASE-Grid Sea Ice Age&lt;/i&gt;. (NSIDC-0611, 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/PFSVFZA9Y85G"&gt;https://doi.org/10.5067/PFSVFZA9Y85G&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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