研究課題
After having get used to the different isotopic models available in our team (MIROC5-iso for the atmosphere/land, COCO-iso for the ocean), we decided to split the technical work between the team members (IIS and Hirosaki University) to begin the implementation of water isotopes in all compartments of the coupled model MIROC6. I successfully implemented the water isotopes in the last version of the oceanic model COCO, in both the ocean and the sea ice. The model is currently running for spin-up (objective of 2000/3000 model years) in order to have proper initial conditions of isotopes in ocean for the coupled setup.We also began a home-made isotopic inter-comparisons project, in the purpose to provide isotopic simulation outputs from different models to the climate community and to compare the skills of the models to represent water isotopes. For the moment, isotope-enabled simulations with the Japanese models MIROC5-iso and IsoGSM, nudged to JRA55 reanalyses for period 1979-2020, have been produced.
2: おおむね順調に進展している
The implementation of isotopes in COCO was smooth and we did not meet major difficulties to produce of the necessary simulation for the isotopic model inter-comparison project.
The technical and scientific plan for this fiscal year is as follows:- implementation of water stable isotopes in all compartments of MIROC6: the last version of the oceanic model COCO with water isotope diagnostics in ocean and sea ice is currently running for spin-up. The update from the version 5 to 6 of atmosphere model MIROC-iso will be the main work for this fiscal year, as well as the coupling of isotope fields between MIROC and COCO.- isotopic inter-comparisons project: The same simulation produced with MIROC5-iso and IsoGSM model will be performed with the German model ECHAM6-wiso in the coming months. The models inter-comparison, made by a PhD student at the Yoshimura Lab, is planned for this fiscal year with a potential publication in a high-ranked journal.- Related to the Euro-Japanese collaboration, the simulation of the last 2000 year with the German isotope-enabled coupled model MPI-ESM-wiso has been performed in the framework of PMIP4 (Paleoclimate Modelling Intercomparison Project, 4th phase). The (isotope) model results will be used for data assimilation thanks to the skills of researchers at Yoshimura Lab (IIS). The objective is to reconstruct the climate variations of the last 2000 years, like surface temperature. A potential publication in a high-ranked journal is expected in the future.
すべて 2021 2020
すべて 雑誌論文 (1件) (うち国際共著 1件、 査読あり 1件) 学会発表 (9件)
Geological Society, London, Special Publications
巻: 507 ページ: 47-61
10.1144/SP507-2020-207
