Category: Sea Ice

Polar sea ice extent since 1990

I have always thought that following sea ice extent using daily SII values from the NSIDC was not a good idea. Even following weekly, monthly or seasonal extremes didn’t seem to simplify the ‘noise’ that you got with line graph or bar chart. That’s why in my opinion a graph of moving 365 day average sea ice extents is ideal at looking at the long term trend in the last 30 years. The Arctic has most people must now realise has seen a steady decline since 1990, although in the last year the 365 day average has recovered somewhat, although...