Arctic Sea Ice Coverage



Environment - Arctic Sea Ice Coverage (from The National Snow & Ice Data Center)

Arctic Sea Ice Coverage in Millions of Square Kilometers by year

Arctic Sea Ice Coverage in Millions of Square Kilometers by year
Chart updated once a year, usually in January

Chart derived from data made available by the National Snow & Ice Data Center: http://nsidc.org/arcticseaicenews/
Top line: Annual Maximum
Middle line: Annual Average
Lower line: Annual Minimum
Purple dots indicate new lows


Analysis

Since the coverage of Arctic Sea Ice has been systematically monitored by satellite starting in the late 1970's, the maximum, minimum and annual average for each year have been in a generally declining trend.

2017 year-end note January 4, 2018: I now have a new data source, The National Snow & Ice Data Center. Their figures follow the pattern of the prior dataset obtained from JAXA Satellite Monitoring of Environmental Studies but in general are a few percent higher. Some of my prior comments have been invalidated going by the new data source, thus I've deleted them here. I've completely revamped the chart. I've added marks (purple dots) to each of the maximum, average and minimum graphs whenever a new annual low was reached. The annual minimum graph made a headliner low in 2012 triggering fears of an ice-less summer in the near future. However, the minimums in the past five years have remained above that level. None-the-less the overall decline in Arctic ice continues, as a new low in the maximum annual ice was reached last year (2017) following a new low in 2015. The average annual ice extent ticked up just slightly from latest low made in 2016. Furthermore, not shown in the chart, is that the year-end figure for 2017 (12.418) set a new year-end low.

Another link: https://ads.nipr.ac.jp/vishop/#/extent