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.
![](https://akclimate.org/wp-content/uploads/2021/10/NH_seaice_extent-2021-9-30-1024x623.png)
![](https://akclimate.org/wp-content/uploads/2021/10/NH_seaice_extent-anomaly2021-9-30-1024x623.png)
Alaska Climate Research Center
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.