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)

2026

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

2025

• Årthun, Marius; Brakstad, Ailin; Dörr, Jakob et al. (2025). Atlantification drives recent strengthening of the Arctic overturning circulation. (external link)
• Davy, Richard; Regan, Heather; Korosov, Anton et al. (2025). A Fair Assessment of Sea Ice Age Reduces Bias and Gives New Insight to Arctic Sea Ice Dynamics. (external link)

2024

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

2023

• Rieke, Ole; Årthun, Marius; Dörr, Jakob Simon (2023). Rapid sea ice changes in the future Barents Sea. (external link)
• Dörr, Jakob Simon; Bonan, David; Årthun, Marius et al. (2023). Forced and internal components of observed Arctic sea-ice changes. (external link)

2022

• Cornish, S.B.; Johnson, H.L.; Mallett, R.D.C. et al. (2022). Rise and fall of sea ice production in the Arctic Ocean’s ice factories. (external link)

2021

• Dörr, Jakob Simon; Årthun, Marius; Eldevik, Tor et al. (2021). Mechanisms of regional winter sea-ice variability in a warming arctic. (external link)
• Årthun, Marius; Onarheim, Ingrid H.; Dörr, Jakob et al. (2021). The Seasonal and Regional Transition to an Ice-Free Arctic. (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