<?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>2026-05-24T07:21:39Z</responseDate><request identifier="G01377.001" metadataPrefix="dif" verb="GetRecord">http://nsidc.org/api/dataset/metadata/oai</request><GetRecord><record><header><identifier>oai:nsidc.org/G01377.001</identifier><datestamp>2026-01-26T20:16:59Z</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>G01377.001</Entry_ID><Entry_Title>Global Lake and River Ice Phenology Database</Entry_Title><Data_Set_Citation><Dataset_Creator>Benson, B., Magnuson, J. &amp; Sharma, S.</Dataset_Creator><Dataset_Title>Global Lake and River Ice Phenology Database</Dataset_Title><Dataset_Release_Date>2000-12-01</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/N5W66HP8</Dataset_DOI><Online_Resource>https://dx.doi.org/10.7265/N5W66HP8</Online_Resource><Dataset_Series_Name>G01377</Dataset_Series_Name></Data_Set_Citation><Personnel><Role>Investigator</Role><First_Name>Barbara</First_Name><Last_Name>Benson</Last_Name><Email>bjbenson@wisc.edu</Email><Phone>1-608-262-3014</Phone><Contact_Address><Address>University of Wisconsin-Madison</Address><Address>Center for Limnology</Address><Address>680 N. Park Street</Address><City>Madison</City><Province_or_State>WI</Province_or_State><Postal_Code>53706</Postal_Code><Country/></Contact_Address></Personnel><Personnel><Role>Investigator</Role><First_Name>John</First_Name><Last_Name>Magnuson</Last_Name><Email>jjmagnus@wisc.edu</Email><Phone>1-608-262-3014</Phone><Fax>1-608-262-2340</Fax><Contact_Address><Address>University of Wisconsin-Madison</Address><Address>Center for Limnology</Address><Address>680 N. Park Street</Address><City>Madison</City><Province_or_State>WI</Province_or_State><Postal_Code>53706</Postal_Code><Country/></Contact_Address></Personnel><Personnel><Role>Investigator</Role><First_Name>Florence</First_Name><Last_Name>Fetterer</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/></Contact_Address></Personnel><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>TERRESTRIAL HYDROSPHERE</Topic><Term>SNOW/ICE</Term><Variable_Level_1>FREEZE/THAW</Variable_Level_1><Variable_Level_2> </Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable>Freeze Date, Breakup Date, Ice Duration</Detailed_Variable></Parameters><Parameters><Category>EARTH SCIENCE</Category><Topic>TERRESTRIAL HYDROSPHERE</Topic><Term>SNOW/ICE</Term><Variable_Level_1>FREEZE/THAW</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>TERRESTRIAL HYDROSPHERE</Topic><Term>SNOW/ICE</Term><Variable_Level_1>LAKE ICE</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>CRYOSPHERE</Topic><Term>SNOW/ICE</Term><Variable_Level_1>RIVER ICE</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><ISO_Topic_Category>Inland Waters</ISO_Topic_Category><Keyword>Breakup</Keyword><Keyword>Broad Spatial Patterns</Keyword><Keyword>Climate</Keyword><Keyword>FREEZE UP</Keyword><Keyword>Ice Off Date</Keyword><Keyword>Ice On Date</Keyword><Keyword>Lake Ice</Keyword><Keyword>Lake Ice Analysis Group</Keyword><Keyword>LIAG</Keyword><Keyword>LONG-TERM TEMPORAL PATTERNS</Keyword><Keyword>LONG-TERM TRENDS</Keyword><Keyword>NOAA</Keyword><Keyword>NSIDC</Keyword><Keyword>River Ice</Keyword><Sensor_Name><Short_Name>VISUAL OBSERVATIONS</Short_Name></Sensor_Name><Source_Name><Short_Name>GROUND-BASED OBSERVATIONS</Short_Name><Long_Name>GROUND-BASED OBSERVATIONS</Long_Name></Source_Name><Temporal_Coverage><Start_Date>0874-01-01</Start_Date><Stop_Date>2018-02-02</Stop_Date></Temporal_Coverage><Data_Set_Progress>complete</Data_Set_Progress><Spatial_Coverage><Southernmost_Latitude>36.15</Southernmost_Latitude><Northernmost_Latitude>82.5</Northernmost_Latitude><Westernmost_Longitude>-140.4</Westernmost_Longitude><Easternmost_Longitude>149.3</Easternmost_Longitude></Spatial_Coverage><Location><Location_Category>Geographic Region</Location_Category><Location_Type>Northern Hemisphere</Location_Type><Location_Subregion1/><Location_Subregion2/><Location_Subregion3/></Location><Data_Resolution><Longitude_Resolution>Varies</Longitude_Resolution><Temporal_Resolution>Varies</Temporal_Resolution></Data_Resolution><Quality>Please see the complete product documentation on the NSIDC Web site for a discussion of quality and data corrections.</Quality><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>3.2 MB</Distribution_Size><Distribution_Format>ASCII</Distribution_Format></Distribution><Reference>Magnuson, J., D. Robertson, B. Benson, R. Wynne, D. Livingstone, T. Arai, R. Assel, R. Barry, V. Card, E. Kuusisto, N. Granin, T. Prowse, K. Steward, V. Vuglinski. 2000. Historical Trends in Lake and River Ice Cover in the Northern Hemisphere Science 289 (8 September):1743-1746.

Also see the papers published in the Proceedings of the Societas Internationalis Limnologiae (SIL) XXVII Congress, 9-14 August, Dublin, Ireland, 1998.</Reference><Summary><Abstract>The Global Lake and River Ice Phenology Database contains freeze and thaw/breakup dates as well as other descriptive ice cover data for 865 lakes and rivers in the Northern Hemisphere. Of the 542 water bodies that have records longer than 19 years, 370 of them are in North America and 172 are in Eurasia. 249 lakes and rivers have records longer than 50 years, and 66 have records longer than 100 years. A few water bodies have data available prior to 1845. 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