OCEAN Breakfast seminar #2: "Closing observational gaps in the Arctic Ocean"

On the second Chalmers Ocean Breakfast Seminar, we will listen to two presentations. 

Part 1:How to measure sea ice drift and deformation in the Arctic Ocean

Presenter: Leif Eriksson

With increasing temperatures the sea ice extent in the Arctic Ocean is decreasing and the sea ice is becoming thinner. This means that sea ice has become more mobile and that ice conditions change more rapidly, which cause increased risks for transport, fishing and other operations. With high resolution satellite images it is possible to observe how the sea ice move and how ice leads open, ice ridges form and ice floes break up. During two expeditions to the Arctic Ocean with the Swedish ice breaker Oden, ice drift buoys have been deployed to validate the satellite observations.

Read more about the expeditions;

ARTofMELT 2023

Canada-Sweden Arctic Ocean 2025

Part 2: Terrestrial dissolved organic matter across the Arctic Ocean

Presenter: Urban Wünsch

The Arctic Ocean exports a large amount of terrestrial dissolved organic matter (DOM) to the Nordic seas. With climate change, the supply of terrestrial DOM from the Arctic Ocean will increase while less sea ice might lead to an increased loss of terrestrial DOM due to photodegradation. Here, I present the first estimates of DOM photosensitivity to estimate the impact of photodegradation across the Arctic Ocean as well as seasonal trends in the Lena River based on a four-year daily sampling campaign.

Two references for papers that will be present;

Wünsch, U. J.; Gonçalves-Araujo, R.; Granskog, M. A.; Ebbesen, L. G.; Papadimitraki, M.; Stedmon, C. A. Fluorescence as a Tracer of the Susceptibility of Dissolved Organic Matter to Photodegradation in the Arctic Ocean. Limnology and Oceanography 2025, 9999 (2025), 1–16.

Juhls, B. et al. Lena River biogeochemistry captured by a 4.5-year high-frequency sampling program. Earth Syst. Sci. Data 17, 1–28 (2025).

Breakfast will be served - please register above.

Use this link to stream the seminar.

The seminar will be live-streamed at Chalmers Youtube, and filmed - the streaming link will be published on this page Friday October 17th 08:00 the latest.

Welcome to join us, in Chalmers Kårhus or online!