Marius Årthun
@mariusarthun.bsky.social
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.
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.
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
science.org
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...
Polar oceans influence the Gulf Stream
The warm Gulf Stream is maintained by coldness. The Barents Sea is a cooling machine.
bjerknes.uib.no
📣 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.
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
jobbnorge.no
Deadline approaching for 3-year postdoc position in Bergen.
Marius Årthun@mariusarthun.bsky.social · 5mo agoBergen 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...
❗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...
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
jobbnorge.no
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...
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
jobbnorge.no
🧪🌊 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!
🌊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
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...
os.copernicus.org
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...
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
jobbnorge.no
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...
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…
ocean2climate.org
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...
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.
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
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...
su.se
Nice paper led by @leonchafik.bsky.social on the North Atlantic-Nordic Seas overturning circulation.
Sang-Ki Lee@sklee621.bsky.social · last yr.Warm & salty North Atlantic water transport to the Nordic Sea (NS) across the Greenland-Scotland Ridge (GSR) didn't show a slowdown since 1972. Instead, it exhibited multidecadal variability. The NS overflow & AMOC across the GSR also display a similar signal. 🌊🧪👍 doi.org/10.1038/s43247-025-02557-x
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/...
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.
science.org
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
Nature@nature.com · last yr.This ship braved the Greenland Sea in winter, venturing into ice-covered waters to capture crucial data about the Earth's future https://go.nature.com/4ebFOGj
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...
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...
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
varmerevaterevillere.no
The Guardian@theguardian.com · last yr.Total collapse of vital Atlantic currents unlikely this century, study finds
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...
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...
doi.org
Brilliant! Help Denmark buy California! Because why not...? denmarkification.com
Help Denmark Buy California – Because Why Not?
Buy it from Trump, the bigliest crowdsourcing ever
denmarkification.com
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
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.
bjerknes.uib.no
Could the AMOC collapse and Bergen become 20 degrees colder (imagine the snow we would get!)? This and more in the latest Bjerknes podcast.
Bjerknes Center for Climate Research (BCCR)@bjerknes.uib.no · 2y agoDive into the depths of ocean science with the latest episode from the Bjerknes Centre Podcast. Join the debate on the future of the Atlantic Meridional Overturning Circulation (AMOC). Will it collapse? Weaken? Or surprise us? Two experts discuss the likelihood of various scenarios. 🌊🧪
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-...
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…
arvenetternansen.com
Prof. Stefan Rahmstorf@rahmstorf.bsky.social · 2y ago“The Arctic is losing its character, losing its soul, that soul being its snow and ice.” Mark Serreze, veteran polar researcher eos.org/features/the...
