Professor Khatiwala spent several hours each day during his three-day visit implementing the Transport Matrix Method (TMM) to the offline HAMOCC model with Ingjald Pilskog. This is a critical preliminary step to building the acceleration method proposed in the project. By the end of his visit, we managed to extract the HAMOCC code from NorESM and coupled it with TMM. In the next step, Khatiwala and Pilskog will perform several basic experiments with the TMM-HAMOCC, while Pilskog will continue with implementing the Newton-Krylov method in Bergen.
Khatiwala also presented an extra talk for the weekly GFI-colloquium entitled ”Constraining ocean ventilation pathways and time scales with observations and models”, which was attended by many Bjerknes scientists.
Increase interaction between disciplines and institutes
In connection to this visitation, we also organized a half-a-day mini-workshop titled ‘Anthropogenic carbon uptake and storage in the North Atlantic’, which was attended by about 20 Bjerknes scientists and Khatiwala. Six short talks were presented by Bjerknes-RG3 scientists, followed by discussions. The following short talks were presented:
- Latest and updated version of GLODAP (Are Olsen, UiB)
- Recent changes in ventilation and CO2 uptake in the North Atlantic (Friederike Fröb, UiB)
- Decadal changes in mean age and anthropogenic carbon in the Nordic Seas (Emil Jeansson, UNI)
- Uncertainties of TTD in the North Atlantic and Nordic Seas (Yanchun He, NERSC)
- Anthropogenic carbon uptake and storage in the N. Atlantic from CMIP5 models (Nadine Goris, UNI)
- Ocean carbon cycle during the past 130kyrs (Christoph Heinze, UiB)
The purpose of the workshop was to introduce Khatiwala with RG3 (Biogeochemistry research group at the Bjerknes centre) activities and to increase interactions between institute/disciplines of RG3 scientists. The workshop was received positively by the participants.
We plan to continue the collaboration with Khatiwala through the ongoing work of Ingjald Pilskog at Uni Research.