Signe Aaboe

@signeaaboe.bsky.social

Climate and sea-ice scientist at MET Norway. Research interests include sea ice, oceans, and polar climate. Living in the far north and love gardening, hiking, paddling, and drinking coffee. Any opinions expressed are my own.

❄ September Arctic daily sea ice reached its annual summer minimum, the 14th lowest on record, with monthly extent about 10% below average. Daily sea ice extent in Antarctica reached its annual winter maximum, the 3rd lowest on record, as reported in the #C3S Climate Bulletin.

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When Ukraine destroys Russian data centers, hoards of aggressive right-wing bots disappear & the internet becomes friendlier. So much of politics is driven by the internet & so much of the internet is driven by Russians who want to hurt us. Shouldn’t we do something about that, given that we know it

Did you know elevated CO₂ reduces protein in flower pollen? New research reveals: 📉 Larger pollinators are less abundant in high-CO₂ areas. 🐝 Yet, large bees are among our most effective pollinators. Understanding these shifts is key to supporting vital pollinators in a warming world.

A female pubescent carpenter bee, Xylocopa pubescens, searching for food on purple wisteria.

Historic warmth is currently impacting our global oceans. September shattered the previous peak for the warmest average global sea surface temperature on record for the month. And this excessive heat is found across nearly all regions. Data from NOAA ERSSTv6. I finally adjusted the y-axis here. 🌊

Green line graph time series of average sea surface temperature anomalies for each September from 1900 through 2026. There is large interannual variability, but an overall long-term increasing trend. Anomalies are computed relative to a 1981-2010 baseline.

23,000,000,000,000,000,000,000 joules. That’s the amount of heat the oceans absorbed in 2025. A number so huge it’s almost meaningless…until you realise it’s roughly 40× humanity’s annual energy use. The ocean is buying us time. We’re running out of it. www.theguardian.com/environment/...

World’s oceans absorbed record heat equal to 40 times annual global energy use

The injection of thermal energy comes amid an increasing rise in sea levels and continuing acidification

theguardian.com

Vi kutter prisene en gang til! 💚 Ny pris: 495 kroner! 🚌 Fra 1. november blir månedskortet for én sone i Oslo 160 kroner billigere. Men billig kollektiv er ikke bare for Oslo. Vi er også i gang med å kutte kollektivprisene i resten av landet, slik at kollektiv blir et godt alternativ i hele landet!

Interesting to compare the 2 sea-ice indices: extent and area. While Arctic sea-ice extent is still approaching its annual minimum, sea-ice area has already passed its minimum. This suggests that initial freeze-up mainly increases ice concentration before expanding the cover. @osi-saf.eumetsat.int

Line plot of Northern Hemisphere sea-ice extent throughout the year for 1978 to 2026, with individual years coloured by decade and 2026 shown in black. Sea-ice extent follows a strong seasonal cycle, decreasing from about 14 to 16 million km² in March to a minimum in September before increasing again. In mid-September 2026, sea-ice extent is still approaching its annual minimum.Line plot of Northern Hemisphere sea-ice area throughout the year for 1978 to 2026, with individual years coloured by decade and 2026 shown in black. Sea-ice area follows a strong seasonal cycle, decreasing from about 13 million km² in March to a minimum in September before increasing again. In 2026, sea-ice area reached its annual minimum in late August/early September and began increasing by mid-September.

Hopen, the narrow island in Norway’s Svalbard archipelago, with sea ice swirling about in beautiful patterns. Image is acquired on 31 May 2026. Credit: European Union, Copernicus Sentinel-2 imagery

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❄ In July, Arctic sea ice extent was 9.6% below 1991–2020 average for July, the sixth-lowest July extent on record, as reported in latest #C3S Climate Bulletin. Antarctic sea ice extent was 6.4% below 1991–2020 average for July, fifth-lowest July extent in satellite record. ⬇️

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