{"id":1133036,"name":"Sea ice anomaly in the Antarctic by month","unit":"million square kilometers","createdAt":"2026-01-15T09:30:52.000Z","updatedAt":"2026-01-15T09:30:52.000Z","coverage":"","timespan":"1980-2025","datasetId":7322,"shortUnit":"million km²","columnOrder":0,"shortName":"sea_ice_extent_antarctic","catalogPath":"grapher/climate/2026-01-14/sea_ice_anomalies_by_month/sea_ice_index#sea_ice_extent_antarctic","descriptionShort":"Each point represents the monthly average sea ice extent relative to a baseline, which is the average sea ice extent for the same month over the 30-year period from 1981 to 2010.","type":"float","grapherConfigIdETL":"019bc0fe-56ca-7978-8e66-c9fc8c8a61fd","datasetName":"Sea ice anomaly in the northern and southern hemispheres","updatePeriodDays":60,"datasetVersion":"2026-01-14","nonRedistributable":false,"display":{"unit":"million square kilometers","shortUnit":"million km²"},"schemaVersion":2,"processingLevel":"minor","presentation":{"titlePublic":"Sea ice anomaly in the Antarctic by month","topicTagsLinks":["Climate Change"]},"dimensions":{"years":{"values":[{"id":1980},{"id":1981},{"id":1982},{"id":1983},{"id":1984},{"id":1985},{"id":1986},{"id":1987},{"id":1988},{"id":1989},{"id":1990},{"id":1991},{"id":1992},{"id":1993},{"id":1994},{"id":1995},{"id":1996},{"id":1997},{"id":1998},{"id":1999},{"id":2000},{"id":2001},{"id":2002},{"id":2003},{"id":2004},{"id":2005},{"id":2006},{"id":2007},{"id":2008},{"id":2009},{"id":2010},{"id":2011},{"id":2012},{"id":2013},{"id":2014},{"id":2015},{"id":2016},{"id":2017},{"id":2018},{"id":2019},{"id":2020},{"id":2021},{"id":2022},{"id":2023},{"id":2024},{"id":2025}]},"entities":{"values":[{"id":365346,"name":"April","code":null},{"id":365351,"name":"August","code":null},{"id":365348,"name":"December","code":null},{"id":365342,"name":"February","code":null},{"id":365347,"name":"January","code":null},{"id":365340,"name":"July","code":null},{"id":365349,"name":"June","code":null},{"id":365350,"name":"March","code":null},{"id":365344,"name":"May","code":null},{"id":365345,"name":"November","code":null},{"id":365341,"name":"October","code":null},{"id":365343,"name":"September","code":null}]}},"origins":[{"id":10809,"title":"Sea Ice Index","producer":"National Snow and Ice Data Center","citationFull":"Fetterer, F., K. Knowles, W. N. Meier, M. Savoie, and A. K. Windnagel. (2017). Sea Ice Index, Version 3 [Data Set]. Boulder, Colorado USA. National Snow and Ice Data Center. https://doi.org/10.7265/N5K072F8.","attribution":"National Snow and Ice Data Center - Sea Ice Index (2026)","attributionShort":"NSIDC","versionProducer":"Version 4","urlMain":"https://nsidc.org/data/g02135/","urlDownload":"https://noaadata.apps.nsidc.org/NOAA/G02135/seaice_analysis/Sea_Ice_Index_Monthly_Data_by_Year_G02135_v4.0.xlsx","dateAccessed":"2026-01-14","datePublished":"2026-01-14","license":{"name":"CC BY 4.0"}}]}