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Marius Årthun

@mariusarthun.bsky.social
427 followers 176 following 16 posts

Researcher at the Geophysical Institute, UiB, and research leader at the Bjerknes Centre for Climate Research, Bergen. Working on ocean circulation/climate dynamics in the Arctic-Atlantic region.

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Reposted by Marius Årthun
Paul Voosen @voosen.me · 11/06/2026
It's out. My latest feature for @science.org, from aboard the RRS Discovery: a deep look at the past, present, and future of AMOC, told through the RAPID program. AMOC is weakening -- maybe, probably. But it also may be more resilient than some have made it seem.
science.org
The ocean current that warms Europe may be more resilient than feared
Studies of the Atlantic's circulation find signs of both weakening and unexpected stability in the face of global warming
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Reposted by Marius Årthun
Bjerknes Center for Climate Research (BCCR) @bjerknes.uib.no · 09/06/2026
AMOC is upheld by cooling in the north. But where is north? @jakobdoerr.bsky.social and colleagues from the Bjerknes Centre, @unibergen.bsky.social, @nansensenteret.bsky.social, @stockholm-uni.bsky.social and @noc.ac.uk investigate dense water formation in the Arctic. bjerknes.uib.no/en/news/golf...
bjerknes.uib.no
Polar oceans influence the Gulf Stream
The warm Gulf Stream is maintained by coldness. The Barents Sea is a cooling machine.
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Reposted by Marius Årthun
Nil Irvalı @nilirvali.bsky.social · 04/05/2026
📣 We are hiring! PhD position available in Arctic Paleoceanography 🔬 🌊 at @unibergen.bsky.social and the @bjerknes.uib.no. The position is part of the national Arctic Ocean 2050 / Polhavet 2050 program. Come & join us! Application deadline: 17th May 2026.
jobbnorge.no
PhD Research Fellow in Arctic Paleoceanography (299717) | University of Bergen
Job title: PhD Research Fellow in Arctic Paleoceanography (299717), Employer: University of Bergen, Deadline: Sunday, May 17, 2026
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Marius Årthun @mariusarthun.bsky.social · 12/04/2026
Deadline approaching for 3-year postdoc position in Bergen.
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Reposted by Marius Årthun
Bjerknes Center for Climate Research (BCCR) @bjerknes.uib.no · 16/03/2026
❗NEW POSITION! Postdoctoral research fellow at the Geophysical Institute and the Bjerknes Centre, within physical oceanography. The position is for a fixed-term period of 3 years and is associated with the Arctic Ocean 2050 program. 🧪🌊 @unibergen.bsky.social www.jobbnorge.no/en/available...
jobbnorge.no
Postdoctoral Research Fellow in physical oceanography (297421) | University of Bergen
Job title: Postdoctoral Research Fellow in physical oceanography (297421), Employer: University of Bergen, Deadline: Friday, April 17, 2026
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Marius Årthun @mariusarthun.bsky.social · 11/03/2026
Bergen calling! Postdoc position at @unibergen.bsky.social and @bjerknes.uib.no focused on the Arctic Ocean and its impacts on the Atlantic overturning circulation (AMOC). The position is part of the national Arctic Ocean 2050 program. www.jobbnorge.no/en/available...
jobbnorge.no
Postdoctoral Research Fellow in physical oceanography (297421) | University of Bergen
Job title: Postdoctoral Research Fellow in physical oceanography (297421), Employer: University of Bergen, Deadline: Friday, April 17, 2026
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Reposted by Marius Årthun
Bjerknes Center for Climate Research (BCCR) @bjerknes.uib.no · 23/02/2026
🧪🌊 Become a researcher within physical ocenography in the Arctic Ocean & the North Atlantic! In our series with available positions, next one out is this one connected to the national research program @arcticocean2050.bsky.social Supervisor: @mariusarthun.bsky.social Come join us in Bergen!
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Reposted by Marius Årthun
Jakob Dörr @jakobdoerr.bsky.social · 13/02/2026
🌊Where and how is dense water in the Arctic formed? In our new paper, we decompose the Arctic overturning circulation (ArMOC), the northernmost part of the AMOC. Check it out 🔽 @bjerknes.uib.no @mariusarthun.bsky.social @kristoferdoos.bsky.social @nansensenteret.bsky.social @noc.ac.uk
os.copernicus.org
The Arctic overturning circulation: transformations, pathways and timescales
Abstract. The Arctic is the northernmost terminus of the Atlantic Meridional Overturning Circulation and is an important source of the densest waters feeding its lower limb. However, relatively little...
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Marius Årthun @mariusarthun.bsky.social · 09/02/2026
Come join us! PhD position at @unibergen.bsky.social and @bjerknes.uib.no on freshwater transport from the Arctic Ocean and its impacts on the Nordic Seas and subpolar overturning circulation. The position is part of the national Arctic Ocean 2050 program. www.jobbnorge.no/en/available...
jobbnorge.no
PhD Research Fellow in physical oceanography (295159) | University of Bergen
Job title: PhD Research Fellow in physical oceanography (295159), Employer: University of Bergen, Deadline: Monday, March 16, 2026
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Reposted by Marius Årthun
Sang-Ki Lee @sklee621.bsky.social · 05/01/2026
Thirty years of in situ observations indicate that a vital ocean current is losing its chill, transporting warmer water to the Arctic. 🌊🧪 ocean2climate.org/2026/01/05/a...
ocean2climate.org
A Highway of Heat to the Arctic: Why a Vital Ocean Current Is Losing Its Chill
This blog post and the “Deep Dive” podcast, created by NotebookLM, are based on “Reduced cooling in the Norwegian Atlantic Slope Current: investigating mechanisms of change from 30 years of observa…
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Reposted by Marius Årthun
Zack Labe @zacklabe.com · 22/10/2025
Ice-free conditions continue in the Barents Sea region of the #Arctic Ocean. This is one area that has observed some of the largest losses of ice over the last few decades... compare the older years (dark/purple lines) to today! Map of this region: zacklabe.files.wordpress.com/2022/08/b203...
Line graph time series of 2025's daily Arctic sea ice extent compared to each year from 1979 to 2024 as shown with thin lines in colors from purple to white. There is large daily variability, but a long-term decreasing trend during all months of the year. A seasonal cycle is also visible in this region.
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Reposted by Marius Årthun
Bjerknes Center for Climate Research (BCCR) @bjerknes.uib.no · 17/10/2025
How will a sudden change in the function of the ocean circulations impact Iceland, Europe, and the world? We had a great panel at the Arctic Circle Assembly 🌊🧪 It was a scientific discussion on the likelihood, uncertainties, and possible consequences if the large ocean circulation were to shift.
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Reposted by Marius Årthun
Bolin Centre for Climate Research @bolincentre.bsky.social · 15/08/2025
Newly published study led by @leonchafik.bsky.social finds that anomalies in temperature and salinity that originate in the midlatitude North Atlantic can affect the #AMOC in the Nordic Seas up to a decade later.❗️ 🌊 Read the full press release below. @stockholm-uni.bsky.social
su.se
Ocean anomalies traveling North crucial for the Atlantic Meridional Overturning Circulation - Stockholm University
Anomalies in temperature and salinity that originate in the midlatitude North Atlantic can affect the Atlantic Meridional Overturning Circulation (AMOC) in the Nordic Seas up to a decade later. The st...
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Marius Årthun @mariusarthun.bsky.social · 29/07/2025
Nice paper led by @leonchafik.bsky.social on the North Atlantic-Nordic Seas overturning circulation.
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Marius Årthun @mariusarthun.bsky.social · 14/07/2025
The Arctic Ocean acts to stabilize the AMOC New paper in #ScienceAdvances by researchers from @bjerknes.uib.no and @oxuniearthsci.bsky.social showing how ongoing Atlantification and sea ice loss leads to a strengthening of the Arctic overturning circulation. www.science.org/doi/10.1126/...
science.org
Atlantification drives recent strengthening of the Arctic overturning circulation
A less ice-covered Arctic shifts dense water formation northward, strengthening the Arctic Ocean overturning circulation.
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Marius Årthun @mariusarthun.bsky.social · 18/06/2025
Very cool article about Kjetil Våge’s ROVER project and how the Nordic Seas could help to decide the fate of the AMOC. @bjerknes.uib.no
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Reposted by Marius Årthun
Khuong Dinh @khuongdinh.bsky.social · 27/05/2025
New Book: The Barents Sea system Gateway to the changing Arctic Happy to contribute to some sections of this exciting book! fagbokforlaget.no/produkt/9788...
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Marius Årthun @mariusarthun.bsky.social · 08/03/2025
Er Golfstrømmen på vei til å gå amok? Vi tar pulsen på havstrømmene våre neste uke (torsdag) på klimafestivalen Varmere Våtere Villere. Kan de stoppe opp? @bjerknes.bsky.social www.varmerevaterevillere.no/programovers...
varmerevaterevillere.no
Når Golfstrømmen går amok — Varmere Våtere Villere
Medvirkende: Marius Årthun , UiB og Bjerknessenteret Andreas Born , UiB og Bjerknessenteret Samtaleleder: Gudrun Sylte , redaksjonesmedlem Varmere Våtere Villere
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Marius Årthun @mariusarthun.bsky.social · 24/02/2025
New paper: The future Barents Sea-A synthesis of physical, biogeochemical, and ecological changes toward 2050 and 2100 Very nice interdisiplinary Nansen Legacy effort, including @jakobdoerr.bsky.social @islarsh.bsky.social @khuongdinh.bsky.social doi.org/10.1525/elem...
doi.org
The future Barents Sea—A synthesis of physical, biogeochemical, and ecological changes toward 2050 and 2100
The Barents Sea is a hotspot for ongoing Arctic climate change, manifested in a rapid warming of the ocean and the atmosphere and a strong decline of the winter sea-ice cover. These changes in the phy...
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Reposted by Marius Årthun
Simon Neby @sneby.bsky.social · 12/02/2025
Brilliant! Help Denmark buy California! Because why not...? denmarkification.com
denmarkification.com
Help Denmark Buy California – Because Why Not?
Buy it from Trump, the bigliest crowdsourcing ever
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Marius Årthun @mariusarthun.bsky.social · 14/01/2025
Deadline day tomorrow! Solicited talk by @rahmstorf.bsky.social about future AMOC weakening.
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Marius Årthun @mariusarthun.bsky.social · 12/12/2024
In our project "Overturning circulation in the new Arctic" (ArMOC) we have deployed two Argo floats in the Arctic (north of Svalbard). A short story on the mission of Knoll & Tott here: bjerknes.uib.no/en/article/n... With Stefanie Semper, Birgit Rinde and @jakobdoerr.bsky.social
bjerknes.uib.no
Buoys on Expedition in the Arctic Ocean
Two instrument-laden buoys ("Knoll" and "Tott") were recently released north of Svalbard, soon to disappear beneath the ice.
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Marius Årthun @mariusarthun.bsky.social · 03/12/2024
Could the AMOC collapse and Bergen become 20 degrees colder (imagine the snow we would get!)? This and more in the latest Bjerknes podcast.
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Marius Årthun @mariusarthun.bsky.social · 22/11/2024
The Barents Sea is a hotspot for ongoing Arctic climate change and could be 7C warmer by 2100. Check out our amazing fact sheets from the Nansen Legacy project! arvenetternansen.com/fact-sheets-...
arvenetternansen.com
Fact Sheets from The Nansen Legacy
Welcome to our fact sheets! The topics of the ten fact sheets are shown as bold text below, and a few more fact sheets are in progress.The Nansen Legacy project has investigated the Barents Sea sys…
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Marius Årthun @mariusarthun.bsky.social · 21/11/2024
A good opportunity for a first post. Come work with us!
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