Aarhus University Researchers Find Arctic Warmer, Ice-Free In Summertime 10,000 Years Ago!

Moving goalposts

Sediment samples show Arctic was warmer 10,000 years ago and was ice free in the summertime. Moreover, the researchers say “it’s uncertain” if Arctic sea ice will disappear in the summertime before 2063.

Image: NASA (public domain) 

The Aarhus University conducted a study that confirms sea ice disappeared from the Arctic during the summer months during the early Holocene – 10,000 years ago.

Researchers from Aarhus University, in collaboration with Stockholm University and the United States Geological Survey, analyzed samples from the previously inaccessible region north of Greenland. The sediment samples were collected from the seabed in the Lincoln Sea. They showed that the sea ice in this region melted away during summer months around 10,000 years ago.

The research team concluded that summer sea ice melted at a time when temperatures were higher than today.

“Climate models have suggested that summer sea ice in this region will melt in the coming decades, but it’s uncertain if it will happen in 20, 30, 40 years, or more. This project has demonstrated that we’re very close to this scenario, and that temperatures only have to increase a little before the ice will melt,” says Christof Pearce, Assistant Professor at the Department of Geoscience, Aarhus University.

Summer temperatures higher than today

The researchers have used data from the Early Holocene period to predict when the sea ice will melt today. During this time period, summer temperatures in the Arctic were higher than today. Although this was caused by natural climate variability opposed to the human-induced warming, it still is a natural laboratory for studying the fate of this region in the immediate future.

In Aarhus the marine samples have been analyzed in collaboration with Associate Professor Marianne Glasius and academic technical staff Mads Mørk Jensen from the Department of Chemistry. Among other things, they studied molecules from certain algae that are only produced when there is sea ice. The researchers can thereby determine when summer sea ice was present in the area.

When the sea ice in the Lincoln Sea begins to melt during the summer months, it can have major consequences for the climate. Where white ice reflects the rays of the sun, a dark sea will absorb more than ten times as much solar energy.

“The sea ice is a base for many ecosystems. The algae we examined are food for fish, fish are food for birds, etc. How will the marine ecosystems be affected globally if the sea ice disappears? We don’t know the answer yet,” says Henrieka Detlef, an assistant professor at the Department of Geoscience.

According to the researchers from Aarhus University, the study can be interpreted as bad news and good news for the climate. Henrieka Detlef also said that if temperatures remain stable or perhaps even fall, “the sea ice would return to the area.”

Alarmist authors

Despite the undisputed powerful natural factors and cycles at play in the Arctic, some researchers take a more alarmist or even hysterical view of what the future holds. For example, warning that greenhouse gas emissions are heating up the planet, Christof Pearce said, citing dubious model results: “The study is a wake-up call, because we know that it will happen. This news is not making the situation more depressing, just more urgent. We have to act now so we can change it.”

The research is published in the journal Communications Earth & Environment, and presented using an alarmist narrative. The study’s results indeed confirm natural factors were at play during the early Holocene, and thus readers need to keep in mind that these natural factors have not gone away. They continue to change and drive our climate today.

Henrieka Detlef et al, Seasonal sea-ice in the Arctic’s last ice area during the Early Holocene, Communications Earth & Environment (2023). DOI: 10.1038/s43247-023-00720-w




6 responses to “Aarhus University Researchers Find Arctic Warmer, Ice-Free In Summertime 10,000 Years Ago!”

  1. voza0db

    Our ancestors were already spewing billions of tonnes of CO2! Those assholes…

  2. Aarhus University Researchers Find Arctic Warmer, Ice-Free in Summertime 10,000 Years Ago! – Watts Up With That?

    […] From the NoTricksZone […]

  3. The Climate Crisis Of 1896 – Newsfeed Hasslefree Allsort

    […] Aarhus University Researchers Find Arctic Warmer, Ice-Free In Summertime 10,000 Years Ago! […]

  4. Aarhus University Researchers Find Arctic Warmer, Ice-Free in Summertime 10,000 Years Ago! – Watts Up With That? – The Insight Post

    […] From the NoTricksZone […]

  5. Arktinen merijää on sulanut aiemminkin | Roskasaitti

    […] omaperäinen osuus tässä jää kyseisen jutun kommentteihin. Kysehän on Gosselinin NoTrickZonen jutusta (Linkki). Jutun kimmokkeena on sitten ollut Detlefin ja kumppaneiden tutkielma Lincolninmeren […]

  6. Nouvelles des Brigades Anti-Graphène. Juin 2023 | Xochipelli

    […] L’université d’Aarhus a mené une étude qui confirme que la glace de mer a disparu de l’Arctique pendant les mois d’été au début de l’Holocène, il y a 10 000 ans. [7] […]

By continuing to use the site, you agree to the use of cookies. more information

The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this. More information at our Data Privacy Policy

Close