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Arctic Sea Ice Extent: October 14, 2021

October 14, 2021: Over the past week the sea ice has now increased from last week by a rate of 9.58% from the level on 10/07/2021 of 5.719 M km2 to 6.325 M km2 for this week.

Arctic Sea Ice Extent: October 7, 2021

October 7, 2021: Over the past week the sea ice has now increased from last week by a rate of 8.59% from the level on 09/30/2021 of 5.228 M km2 to 5.719 M km2 for this week.

Arctic Sea Ice Extent: September 30, 2021

September 30, 2021: Over the past week the sea ice has now increased from last week by a rate of 6.64% from the level on 09/23/2021 of 4.881 M km2 to 5.228 M km2 for this week.

Arctic Sea Ice Extent: September 23, 2021

September 23, 2021: Over the past week the sea ice has now increased from last week by a rate of 2.89% from the level on 09/16/2021 of 4.740 M km2 to 4.881 M km2 for this week. This marks the end of the sea ice loss season, with a minimum value of 4.740 M km2 for 2021.

First Snowfall Date

With winter fast approaching, one commonly asked question we get is “What is the average date of the first snowfall of the season?”  The answer is that it depends on the location.  The table below shows the mean date of the first snowfall at 19 first-order weather stations, as well as the earliest and latest …

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