A climate data record of sea ice age using Lagrangian advection of a triangular mesh

Korosov, Anton; Edel, Léo; Regan, Heather; Lavergne, Thomas; Aaboe, Signe; Down, Emily Jane

doi:10.5194/essd-18-721-2026

Articles | Volume 18, issue 1

https://doi.org/10.5194/essd-18-721-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/essd-18-721-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 1

Data description paper

|

30 Jan 2026

Data description paper |

| 30 Jan 2026

A climate data record of sea ice age using Lagrangian advection of a triangular mesh

Anton Korosov, Léo Edel, Heather Regan, Thomas Lavergne, Signe Aaboe, and Emily Jane Down

Data sets

Arctic Sea Ice Age Climate Data Record Version 2.1.1 Anton Korosov and Léo Edel https://doi.org/10.21343/sqvr-rq75

Arctic Sea Ice Age Climate Data Record Version 2.1 (monthly) Anton Korosov and Léo Edel https://doi.org/10.5281/zenodo.15773500

Model code and software

Sea ice age computation software, PySeaIceAge-2.1.1 Anton Korosov and Léo Edel https://doi.org/10.5281/zenodo.16743289

Video supplement

Animation of the Arctic Sea Ice Age Climate Data Record Version 2.1 Anton Korosov https://youtube.com/shorts/h5MTsKuT8ic

Explanatory animations for the Arctic Sea Ice Age Climate Data Record Version 2.1 Anton Korosov https://doi.org/10.5281/zenodo.16744295

Short summary

We present a new long-term record of Arctic sea ice age spanning from 1991 to 2024. Using satellite data and a new tracking method, it maps fractions of sea ice from first- to sixth-year and includes uncertainty estimates. The dataset shows a decline in older ice and more first-year ice, it agrees well with buoy data, and supports Arctic monitoring, climate research, navigation, and model evaluation.