"Short summary:
With the support of North2north for Staff and Faculty Mobility grant, I have visited the University of Bergen (UiB) during the period of 16-27 October. As UiB has broad networking with, and also is neighbouring to, other institutions at Bjerknes Centre for Climate Research (BCCR), the visit at UiB provided me excellent opportunities to meet and strengthen collaboration with marine scientists in relevant institutes at BCCR. Here is a summary of activities during my visit:

• Work update and planning meeting based on FJO2RD project funded by the Research Council of Norway (RCN). Participants included collaborators Elin Darelius Chiche from UiB, Bjørg Risebrobakken at Norwegian Research Centre (NORCE), Yanchun He from Nansen Environmental and Remote Sensing Center (NERSC) and Jixin Qiao from DTU. We discussed the preliminary results obtained for the Norwegian fjords, and sampling plan for the upcoming field expedition in February 2024. It was agreed that Eline will be responsible for the new sampling collection, Jixin will continue with the sample analysis for radionuclides. Yanchun will check the possibility of coupling reginal oceanic modelling and Bjørg will share the sediment analysis resluts for dating and trace elements. We will meet up again when we have more analytical data.

• Status meeting on the ANTHROPIC project funded by Nordic Nuclear Safety Research (NKS). Participants included collaborators Yanchun He, Lasse H. Pettersson Annette Samuelsen from NERSC and Mu Lin (Postdoc of mine), Jixin Qiao from DTU. At the meeting, Mu Lin and Yanchun presented the recent progress and results of the hindcast simulation by the Norwegian Earth System Model (NorESM) for the dispersion of re-processing derived 129I, 99Tc and 236U in the North-Atlantic and Arctic Ocean. The simulation resolution showed good agreement with the observation data. It is concluded that Mu Lin will continue to work on the simulation data, including the virtual tracers, to better understand large-scale and long-period variability of Arctic Ocean circulation patterns. Mu Lin will prepare a manuscript based on the outcomes of the project. We also discussed the possibility for further applying funding to proceed this research.


• One-day visit at IMR: I had a one-day visit at Institute of Marine Research (IMR), Norway, hosted by senior scientist Hilde Elise Hedal. I had well-established collaboration with Hilde in the past few years, where she provided a number of valuable marine samples to prompt my oceanic tracer studies using 233U-236U tracer. During my visit, we discussed the plan for continued collaboration, including master projects at IRM, the upcoming visit of Hilde at DTU in 2024, and student exchange.


• Participation into Bjerknes Annual Meeting on the 19th October: The program included introductions and perspectives from the four research groups, key note speakers, round table discussions, poster sessions and eager opportunities to catch up. It was an interesting and fruitful day, I have got the opportinity to know more researchers at BCCR and expanded my networking for sampling in the Arctic Region.


• Laboratory visit at NORCE: Prf. Bjørg Risebrobakken provided me a lab tour at NORCE, where I saw their facilities for sediment processing, and also got to know an expert in coral sample preparation and analysis. The instruments at NORCE and experience for coral studies will be valuable for my future work in marine studies using natural archives including coral."