Observations on Arctic Sea Ice Challenge the Notion of Particularly Rapid Melting

I promised at the end of September, in my Finnish-language blog, to return to the topic of this year’s Arctic sea ice situation. At that time, it was already known—based on NSIDC’s daily measurements—that the annual minimum extent was the eleventh smallest in the history of the statistics. 

Then, at the beginning of October, the data on the average sea ice area for September was released. It appears at the endpoint of the curve below, under which only the points for the years 2007, 2016, 2019, and 2020 fall. Notably, this supports the view that the ice area has remained at the same level since 2007—that is, for 12 years already. The figure also clearly shows how, in September 2012, the ice area was distinctly smaller than in any other year.

This observation supports a recently published research report by Chinese scientists, according to which the phenomenon known as the North Atlantic Oscillation shifted from the lowest point of its negative phase in the early 2010s into a positive phase. As a result, the reduced heat and moisture, as well as the weakened downward longwave radiation, have led to a slowing of Arctic sea ice melting.

According to that study, however, this slowdown in melting would be only an intermediate stage, to be followed in the 2030s or 2040s by a rapid melting of northern sea ice—and subsequently, a series of environmental disasters around the world.

At this stage, of course, it is too early to take a position on that latter risk or its likelihood. Nevertheless, it can be stated that the slowdown in the melting of northern sea ice—at least for the time being—is a fact, one that seems at least partly to challenge the idea that the climate warming responsible for melting the ice is proceeding particularly rapidly in the Arctic region.

Previous thoughts on the same topic:
The Northern Sea Ice Area in 2024 Was Not the Smallest on Record
Can climate models predict the distribution of warming?
Correct minister, ridiculous facts