A network of wave, sea-ice drift, and temperature observations across the Nansen and Amundsen Basin
ArctSum-25 was conducted during the HiAOOS cruise with support from the Norwegian Coast Guard onboard KV Svalbard in July and August 2025. The campaign objective is to improve coupled Arctic prediction systems by observing atmosphere-ocean-wave-sea-ice interactions along a transect from about 82.5N, 25E to 88N, 80E.
As part of the HiAOOS cruise 2025, and the logistical support from the Norwegian Coast Guard, the campaign was conducted aboard KV Svalbard during July and August 2025. A total of 16 buoys were deployed along a transect stretching from 82.5°N, 25°E to 88°N, 80°E. In addition, 3 buoys will be deployed by the Swedish Icebreaker Oden in August/September 2025 in the central Arctic.
The campaign deployed a distributed network of 16 OpenMetBuoys to support comparisons between in situ observations, remote sensing products, and model output. In addition to drift and wave measurements, the ArctSum-25 buoy configuration includes extended thermodynamic observations with a 1-meter air temperature sensor, an infrared sensor for snow-surface skin temperature, and a temperature string across the snow-ice-ocean interface (22 sensors sampled hourly).
The OpenMetBuoy platform is open-source, low-cost, and optimized for polar operations, enabling dense autonomous observations over several months. For ArctSum-25, quality-controlled and calibrated campaign data are prepared for open release, with early access available on request via the campaign team.
Campaign products can also be explored through the OVL portal (interactive view) and through the live trajectory map below. Related releases and publication updates are listed on the Data and papers page.