{"source":"https://nsidc.org/data/g02135 (NSIDC Sea Ice Index v4, Fetterer et al.)","note":"Extensión media de hielo marino ártico en septiembre (mínimo anual), millones de km².","year":[1979,1980,1981,1982,1983,1984,1985,1986,1987,1988,1989,1990,1991,1992,1993,1994,1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022,2023,2024,2025,2026],"extent":[7.05,7.67,7.14,7.3,7.39,6.81,6.7,7.41,7.28,7.37,7.01,6.14,6.47,7.47,6.4,7.14,6.08,7.58,6.69,6.54,6.12,6.25,6.73,5.83,6.12,5.98,5.5,5.86,4.27,4.69,5.26,4.87,4.56,3.57,5.21,5.22,4.62,4.53,4.82,4.79,4.36,4.0,4.95,4.9,4.38,4.35,4.75,4.81]}