In my PhD, I studied the present and future drivers of Arctic sea-ice variability using a combination of observations and earth system models. Currently, I'm using Lagrangian modelling to understand the mechanisms of Atlantic Water transformation and its impact on the Arctic overturning circulation, the northernmost terminus of the AMOC.

Outreach video on the ever moving sea ice edge in the Barents Sea:

The ever moving ice edge

 

Outreach piece about sea ice variability and the long term trend (in Norwegian):

Stadig mindre havis i arktis

 

Outreach piece about Dörr et al. (2024):

Fremtidig variasjon av arktisk sjøis i ene varmende verden

 

Outreach piece about a cruise in the Barents Sea:

Journey across the polar front

 

Outreach piece on current winter trends in the Arctic and a comparison with the Fram expedition:

What is happening to the Arctic sea ice in winter?

 

 

Course responsible:

• GEOF301 An Introduction to Master's Studies (autumn 2024 - 2027)

Teaching assistant:

• GEOF232 Praktisk meteorologi og oseanografi (spring 2020 - 2022)
• GEOF301 An Introduction to Master's Studies (spring 2020 - 2022)
• GEOF337 Physical Oceanography in Fjords (spring 2020 - 2022)

2025

• Marius Årthun; Ailin Brakstad; Jakob Dörr et al. (2025). Atlantification drives recent strengthening of the Arctic overturning circulation. (external link)
• Richard Davy; Heather Regan; Anton Korosov et al. (2025). A Fair Assessment of Sea Ice Age Reduces Bias and Gives New Insight to Arctic Sea Ice Dynamics. (external link)
• Marius Årthun; van Khuong Dinh; Jakob Simon Dörr et al. (2025). The future Barents Sea- A synthesis of physical, biogeochemical, and ecological changes toward 2050 and 2100. (external link)
• Laurene Pecuchet; Bayoumy Mohamed; Alexander Hayward et al. (2025). Arctic and Subarctic marine heatwaves and their ecological impacts. (external link)

2022

• Jakob Simon Dörr; Marius Årthun; D.B. Bonan et al. (2022). Patterns of decadal variability in observed Arctic sea-ice concentration. (external link)
• Jakob Simon Dörr; Marius Årthun; Tor Eldevik (2022). Present and future influence of ocean heat transport on winter Arctic sea-ice variability. (external link)
• S.B. Cornish; H.L. Johnson; R.D.C. Mallett et al. (2022). Rise and fall of sea ice production in the Arctic Ocean’s ice factories. (external link)

2024

• Marius Årthun; Tor Eldevik; Jakob Simon Dörr (2024). Present and future drivers of Arctic sea ice variability. (external link)
• Jakob Simon Dörr; Marius Årthun; David Docquier et al. (2024). Causal Links Between Sea-Ice Variability in the Barents-Kara Seas and Oceanic and Atmospheric Drivers. (external link)
• Jakob Simon Dörr; David Bonan; Marius Årthun et al. (2024). Forced and internal components of observed Arctic sea ice changes. (external link)
• Jakob Simon Dörr; Marius Årthun; David Docquier et al. (2024). Quantifying the causal links between sea-ice variability in the Barents-Kara Seas and oceanic and atmospheric drivers. (external link)
• Jakob Simon Dörr; Marius Årthun; Tor Eldevik et al. (2024). Expanding Influence of Atlantic and Pacific Ocean Heat Transport on Winter Sea-Ice Variability in a Warming Arctic. (external link)
• Jakob Simon Dörr; Marius Årthun; David Docquier et al. (2024). Causal links between Barents-Kara sea-ice variability and oceanic and atmospheric drivers. (external link)
• David Bonan; Jakob Simon Dörr; Robert C.J. Wills et al. (2024). Sources of low-frequency variability in observed Antarctic sea ice. (external link)

2023

• Jakob Simon Dörr; Marius Årthun; David Bonan et al. (2023). Modes of decadal variability in observed Arctic sea-ice concentration. (external link)
• Jakob Simon Dörr; David Bonan; Marius Årthun et al. (2023). Forced and internal components of observed Arctic sea-ice changes. (external link)
• Jakob Simon Dörr; Marius Årthun; David Bonan et al. (2023). Patterns and mechanisms of low- frequency Arctic sea ice variability. (external link)
• Ole Rieke; Marius Årthun; Jakob Simon Dörr (2023). Rapid sea ice changes in the future Barents Sea. (external link)
• Jakob Simon Dörr; Marius Årthun; Tor Eldevik et al. (2023). Arctic sea ice variability and retreat. (external link)
• Jakob Simon Dörr (2023). Highlighted Paper – The ice factories of the Arctic Ocean. (external link)
• Jakob Simon Dörr; Marius Årthun; Tor Eldevik et al. (2023). Present and Future Influence of Ocean Heat Transport on Winter Arctic Sea-Ice Variability. (external link)
• Jakob Simon Dörr; David Bonan; Marius Årthun et al. (2023). Forced and internal components of observed Arctic sea ice changes. (external link)

2021

• Jakob Simon Dörr; Marius Årthun; Tor Eldevik et al. (2021). Mechanisms of regional winter sea-ice variability in a warming arctic. (external link)
• Marius Årthun; Ingrid H. Onarheim; Jakob Dörr et al. (2021). The Seasonal and Regional Transition to an Ice-Free Arctic. (external link)
• Johanne Skrefsrud; Jakob Simon Dörr (2021). En reise over Polarfronten. (external link)
• Jakob Simon Dörr; Marius Årthun; Tor Eldevik et al. (2021). Atmospheric and oceanic drivers of regional Arctic winter sea-ice variability in present and future climates. (external link)

2026

• Jakob Dörr; Carlo Mans; Marius Årthun et al. (2026). The Arctic overturning circulation: transformations, pathways and timescales. (external link)

2020

• Andreas Hadsel Opsvik; Jakob Simon Dörr (2020). Stadig mindre havis i Arktis. (external link)

See a complete overview of publications in Cristin.

ArMOC: Overturning circulation in the new Arctic (FRIPRO Researcher Project), PI: Marius Årthun, Role: Postdoc