Title,"Figure 2. Age of Arctic Sea Ice at Minimum September Week, 1984-2024",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Short title,Age of Arctic Sea Ice,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Source,EPA's Climate Change Indicators in the United States: www.epa.gov/climate-indicators,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Data source,"Data sources: NSIDC (National Snow and Ice Data Center). (2021, April 10). Sea ice age. https://nsidc.org/data/soac/sea-ice-age; NSIDC (National Snow and Ice Data Center). (2024, November 15). Update to NSIDC. (2023). EASE-Grid sea ice age, version 4 [Data set]. https://nsidc.org/data/nsidc-0611/versions/4.
Web update: December 2024",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Short data source,"Data source: NSIDC, 20217, 20248
Web update: December 2024",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Units,Square miles,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, x-ticks,"1,6,11,16,21,26,31,36,41,46",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, y-axis,Sea ice extent (million square miles),,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, x-axis,Year,1984,1985,1986,1987,1988,1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022,2023,2024 Year interval,5,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Data,First-year ice,468341.9189,427028.9879,553284.3938,440928.6656,675678.7783,787648.4044,521237.9147,649037.7293,831664.0505,519693.506,835911.1742,539770.8183,1083402.658,672203.8588,722011.0373,467955.8167,759462.9468,852513.5671,467955.8167,652126.5466,631663.1321,591122.4054,795756.5497,488033.129,971046.9299,949039.1068,765254.4791,744018.8604,526257.2427,995371.3659,797300.9583,713516.7898,747107.6777,925486.8751,683400.8214,784559.5871,609269.2069,1061008.733,816992.1684,761393.4575,839772.2 Data,Second-year ice,284171.189,329345.1416,237452.8278,297684.7646,220850.4349,269113.2048,391121.4871,295368.1516,362936.0295,388032.6698,323939.7114,409268.2885,260618.9573,515832.4844,308495.625,324325.8136,224325.3544,402704.5518,379152.3201,241313.8494,353669.5776,341700.4107,308109.5229,305792.9099,167954.4392,303090.1948,453283.9347,382627.2396,269113.2048,333206.1632,413515.4123,295368.1516,279537.9631,374905.1964,429731.703,203089.7356,285329.4955,219692.1285,421237.4555,320850.8941,374905.2 Data,Third-year ice,240927.7472,241699.9515,259846.753,192278.8752,209267.3702,137066.2664,179537.5039,288418.3128,216217.209,252510.812,314673.2596,211197.881,279151.861,194981.5903,339769.8999,241699.9515,213128.3918,178765.2996,276063.0437,254055.2206,169112.7456,224711.4565,230502.9889,122780.4866,98842.1527,71042.79726,108880.8088,231275.1932,105791.9916,155985.2722,167568.337,194595.4881,108880.8088,82625.86203,247105.3818,147491.0247,102317.0721,161776.8046,113514.0347,177993.0953,102703.17 Data,Fourth-year ice,233205.704,215058.9026,194981.5903,223553.1501,153668.6593,123552.6909,83398.06634,150193.7399,189576.1601,111969.6261,138610.6751,147877.1269,155213.0679,178765.2996,125869.3038,245174.871,159074.0895,149035.4334,141699.4924,193823.2838,146332.7183,71042.79726,102317.0721,66409.57135,75289.92101,48262.76987,29729.86624,27413.25329,72587.20589,55212.60874,102703.1743,64479.06055,72973.30805,34363.09215,24710.53818,144788.3096,67953.97998,61776.34544,80309.24907,28571.55977,49421.08 Data,5+ year ice,812745.0447,911973.2996,945950.2896,993440.8551,1070661.287,831277.9483,696914.397,638226.8688,573747.8083,606952.5939,579925.4428,535909.7967,548265.0658,484172.1074,540929.1248,572203.3996,613516.3307,575678.3191,544017.942,565639.6629,486874.8225,466025.3059,404635.0626,235908.4191,234750.1127,215445.0047,135907.96,85714.6793,41312.93101,69112.28646,64865.16271,95753.33543,74903.81885,64092.95839,40154.62454,21235.61875,86872.98578,50965.48499,51351.58715,35907.50079,45560.05