ENVIRONMENT INTEL Arctic Sea Ice Decline Accelerating Beyond Climate Models Arctic sea ice extent has declined ~13% per decade since 1979, but recent years show acceleration exceeding most IPCC projections by 20-30%. Historical comparison: summer minimum ice coverage averaged 7.5 million km² in the 1980s versus 3.6 million km² today. This matters because Arctic albedo loss (ice→dark ocean absorbs more heat) creates a feedback loop amplifying warming across northern hemisphere weather patterns, affecting jet stream stability and precipitation systems as far south as North America and Europe.