Re: Een vraag over het opvallende koudeputje van de vorige zomer

Geen tijd om hier verder in te verdiepen, maar dit zou op weg moeten helpen:

https://nsidc.org/arcticseaicenews/category/analysis/page/2/

While large parts of the world saw record breaking heat in July, and Antarctic sea ice extent remained at record daily lows as assessed over the satellite record, Arctic sea ice extent for July was only the twelfth lowest in the satellite record. At month’s end, ice concentrations were low north of the Laptev Sea; however, the Northern Sea Route and the Northwest Passage retained considerable ice.

Conditions in context

Air temperatures at the 925 millibar level (approximately 2,500 feet above the surface) over the Arctic Ocean for the first half of July ranged from 3 to 6 degrees Celsius (5 to 11 degrees Fahrenheit) below average over the Laptev Sea, contrasting with above-average values of 2 to 7 degrees Celsius (4 to 13 degrees Fahrenheit) in a band extending from northeast of Greenland to the Beaufort Sea off the coast of Canada (Figure 2a). Particularly warm conditions were the rule near the MacKenzie River delta. Another area of warm conditions existed in the southern Baffin Bay and the Labrador coast. The atmospheric circulation for the first half of July was characterized by generally low pressure over the Siberian side of the Arctic Ocean, and high air pressure in a broad area covering Greenland, Fram Strait, and the northern Barents Sea (Figure 2b).

De website is nogal rommelig opgesteld (alle berichten onder elkaar), maar bevat veel info. Ik vind niet dadelijk een link tussen de trog en het zeeijs terug, maar misschien is het wel ergens te vinden op die site.