TRACing Atlantic WatEr Masses in Arctic fjords using Uranium-236 and Iodine-129: A novel approach to detect AtlantifICation (TRACEAtlantIC)

The primary objective of the TRACE-AtlantIC project is to expand the knowledge in the oceanographic distribution of long-lived radionuclides U-236 and I-129 and their isotopic ratios to acquire a better understanding on how fast and intense Atlantification is ongoing in Arctic fjords. To do so, a selection of full-depth profiles of water samples from Arctic fiords located in the western Svalbard (Kongsfjorden-Krossfjorden) will be collected, processed, and then measured and interpreted for these novel transient oceanographic tracers. The secondary objective of the project is to fit U-236 and I-129 data with salinity-temperature time-series data into oceanographic models to quantify the transport time and mixing regimes of Atlantic waters into Arctic fjords located in the western Svalbard.