Sea ice 2019 April

Some growth this year after the onset of melt season - but overall the decline in extent continues as normal (see second plot).

Data from  https://ads.nipr.ac.jp/vishop/#/extent

Some changes to plots from previous versions.

2019 Nenana - River Ice breakup

The Nenana Ice Classic for 2019  ended when the Tanana river ice broke up on 14th April 2019 at 12:21 AM.

Two days before breakup:

Plots below assume AST throughout the record.

A large drop this year (earlier breakup) but is within the bounds of noise in this very noisy system. It does follow the downward trend from the 1970s.