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Freeze Onset 2019 Chukchi Sea.png

Image
Line graph of freeze onset from 1980 to 2020.

The black dots show the observed day of year that sea-ice concentration in the reference area northwest of Icy Cape first reaches 30%, as determined from passive microwave data. The blue markers show the range (14 days) of the projected onset of freeze in 2019. The dashed line shows the long-term mean (1981-2016).