Jakob Dörr
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jakobdoerr.bsky.social
Jakob Dörr
@jakobdoerr.bsky.social
410 followers 260 following 4 posts
Postdoc at the Geophysical Institute and Bjerknes Centre for Climate Research in Bergen, Norway; interested in Arctic sea ice, climate, oceanography and meteorology, Arctic Ocean circulation, hiking, climbing
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jakobdoerr.bsky.social
🌊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
February 13, 2026 at 9:47 AM
Reposted by Jakob Dörr
bjerknes.uib.no
By applying a tracking method to both climate models and satellite data, @davyclimate.bsky.social found that sea ice age is a more sensitive indicator of change than ice thickness or volume.

🧪🌊 Read the publication here: agupubs.onlinelibrary.wiley.com/doi/epdf/10....
October 2, 2025 at 10:42 AM
Reposted by Jakob Dörr
davyclimate.bsky.social
We have a new paper out today taking a fresh look at sea ice age, showing how this variable offers new insights into Arctic climate change:
A Fair Assessment of Sea Ice Age Reduces Bias and Gives New Insight to Arctic Sea Ice Dynamics
agupubs.onlinelibrary.wiley.com/doi/10.1029/...
A Fair Assessment of Sea Ice Age Reduces Bias and Gives New Insight to Arctic Sea Ice Dynamics
We applied the same algorithm for diagnosing sea ice age in observations to a climate model for the first time The derived sea ice age reproduces the model dynamics but has much lower bias compar...
agupubs.onlinelibrary.wiley.com
September 24, 2025 at 8:27 AM
Reposted by Jakob Dörr
bjerknes.uib.no
Good news for the Gulf Stream! A study from @unibergen.bsky.social, the Bjerknes Centre and @ox.ac.uk indicates that the Arctic Ocean compensates for less deep water formation farther south. @mariusarthun.bsky.social @ailinbrakstad.bsky.social @jakobdoerr.bsky.social
July 14, 2025 at 10:18 AM
Reposted by Jakob Dörr
khuongdinh.bsky.social
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...
May 27, 2025 at 7:32 PM
Reposted by Jakob Dörr
heleneocean.bsky.social
🌊 Interested in a phd position in physical oceanography? Try beautiful Bergen! tinyurl.com/Phd-oceanogr...
May 19, 2025 at 9:44 AM
Reposted by Jakob Dörr
bjerknes.uib.no
From sea ice to the atmosphere, Earth’s systems are more interconnected than you think! Take a tour with this interactive illustration and see how climate models help scientists uncover the mysteries of our planet.🧪
Home - Explore The Earth System
Planet Earth is more than a giant rock in space. Our planet has an atmosphere and oceans, it has sea ice and ice sheets, and it has… Read more "Home"
expearth.uib.no
February 5, 2025 at 11:58 AM
jakobdoerr.bsky.social
To celebrate #CTDAppreciationDay, here's a video of a ride-along with a CTD in a (biologically active) Norwegian fjord during a student cruise! 🌊
January 22, 2025 at 4:48 PM
Reposted by Jakob Dörr
mariusarthun.bsky.social
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
December 12, 2024 at 3:27 PM
Reposted by Jakob Dörr
mariusarthun.bsky.social
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-...
November 22, 2024 at 7:22 PM
Reposted by Jakob Dörr
mariusarthun.bsky.social
A good opportunity for a first post. Come work with us!
November 21, 2024 at 6:15 PM
Reposted by Jakob Dörr
bjerknes.uib.no
The northern Barents Sea could be 7 degrees warmer in 2050. Two scenarios, one a 4 degree increase and the other a 2.5 increase showed similar results.

"One of the main findings is that you can't see a difference between these scenarios in 2050," says researcher Marius Årthun, with UiB and BCCR.🧪🌊
New study: The northern Barents Sea could be seven degrees warmer in 2050
The Barents Sea is heading toward an ice-free future, researchers report.
www.sciencenorway.no
November 19, 2024 at 12:01 PM
Reposted by Jakob Dörr
lauradietrich.bsky.social
Starting in 2025, March 21 becomes the #WorldDayForGlaciers 🧊. Living in Norway I know the white beauties' magic 🏔️❄️ - being German, I know how it is to lose all of them in the next decade. What are the costs of cultural and environmental heritage for our limitless emissions? #ClimateAction
March 21, 2024 at 2:53 PM
Reposted by Jakob Dörr
bjerknes.uib.no
We have a new doctor in the house! Many congratulations Dr. Jakob Dörr @jakobdoerr.bsky.social, who defended his thesis "Present and future drivers of Arctic sea ice variability" today!
Read his latest publication here:
www.researchgate.net/publication/...
Jakob Dörr smiling during celebration of his doctoral defence
March 7, 2024 at 8:09 PM
Reposted by Jakob Dörr
seaiceclimate.bsky.social
New paper alert: While ice-free conditions in September are now likely unavoidable, with first ice-free days possible within the next decade & likely before 2050, future emissions will determine how frequently & for how long the Arctic will be ice-free. rdcu.be/dApgx
March 5, 2024 at 6:46 PM
jakobdoerr.bsky.social
Got some Lagrangian perspective on the flight home from #OSM24
February 24, 2024 at 8:26 PM
Reposted by Jakob Dörr
heleneocean.bsky.social
Well done @jakobdoerr.bsky.social 👏
February 22, 2024 at 4:35 PM
Reposted by Jakob Dörr
inagler.bsky.social
Getting ready for Monday of #OSM24 🌊🔭✨
Come visit my poster on the interaction of subpolar gyre and overturning circulation:
ativsoftware.com/appinfo.php?...
Slides to accompany my poster presentation and coffee
February 19, 2024 at 1:43 PM
jakobdoerr.bsky.social
I'm excited for #OSM24! If you are interested in sea-ice variability, come see my talk on Thursday at 9:36 AM about causal links between Barents-Kara sea ice and oceanic and atmospheric drivers. Preprint here: doi.org/10.22541/ess...
@bjerknes.bsky.social

Also happy to meet, hang out, or discuss 🙂
February 18, 2024 at 5:24 PM
Reposted by Jakob Dörr
lauradietrich.bsky.social
Check out our new paper on the contribution of vapor fluxes to the surface mass balance of the Greenland Ice Sheet! 🧐🤓
tc.copernicus.org/articles/18/...

We find that sublimation is a major driver of the summer SMB in the accumulation zone, removing about a third of the snowfall in June and July. 🌨️
January 15, 2024 at 3:54 PM