Regional Features of the Arctic Sea Ice Area Changes in 2000–2019 versus 1979–1999 Periods

One of the most striking manifestations ongoing climate change is a rapid shrinking Arctic sea ice area (SIA). An important feature observed SIA loss nonlinear rate decline with an accelerated decrease in 2000–2019 period relative to more gradual 1979–1999. In this study, we perform quantitative assessment and comparison spatial-temporal changes during these two periods. It was found that winter primarily associated Barents Sea, where has than three-fold summer autumn, rates increased strongly Kara, Beaufort Seas, Northwestern Passage, inner Ocean. The amplitude seasonal cycle also earlier period, largest Ocean, Laptev, East Siberian Seas Sea winter. results may reflect transition new dynamic state recent decades triggering positive feedbacks system.