| Project/Area Number |
23K25946
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| Project/Area Number (Other) |
23H01250 (2023)
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Multi-year Fund (2024)
Single-year Grants (2023) |
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| Section | 一般 |
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| Review Section |
Basic Section 17020:Atmospheric and hydrospheric sciences-related
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
RICHTER INGO 国立研究開発法人海洋研究開発機構, 付加価値情報創生部門(アプリケーションラボ), グループリーダー代理 (20649470)
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| Co-Investigator(Kenkyū-buntansha) |
東塚 知己 東京大学, 大学院理学系研究科(理学部), 准教授 (40376538)
木戸 晶一郎 国立研究開発法人海洋研究開発機構, 付加価値情報創生部門(アプリケーションラボ), 研究員 (40878394)
時長 宏樹 九州大学, 応用力学研究所, 教授 (80421890)
小坂 優 東京大学, 先端科学技術研究センター, 准教授 (90746398)
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| Project Period (FY) |
2024-04-01 – 2027-03-31
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| Project Status |
Granted (Fiscal Year 2024)
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| Budget Amount *help |
¥18,460,000 (Direct Cost: ¥14,200,000、Indirect Cost: ¥4,260,000)
Fiscal Year 2026: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2025: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2024: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2023: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
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| Keywords | global climate model / linear inverse model / interbasin-interaction / El Nino / Atlantic Nino / pacemaker experiment / interbasin interaction / ENSO / tropical Atlantic / CMIP6 / Linear Inverse Model / basin interaction / GCM experiments |
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| Outline of Research at the Start |
This project aims to show that it is possible to reproduce aspects of global climate model simulations with a data-driven framework that requires only a fraction of the computational cost. This technique will be used to better understand the interaction between the tropical Atlantic and El Nino.
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| Outline of Annual Research Achievements |
The goals for fiscal year 2024 were largely achieved. Co-I Kosaka has performed control and pacemaker experiments with the GFDL CM2.1 global climate model (GCM). Co-I Kido has used the output from these experiments to build linear inverse models (LIMs). These LIMs were used to perform corresponding control and pacemaker experiments. The results show that the LIM is able to replicate important aspects of the GCM counterparts. PI Richter and Co-I Kido have presented these results at international workshops. A manuscript is currently being drafted by Co-I Kido with participation of all project members. The corresponding set of experiments with the CESM GCM have not been completed yet but are in preparation by international collaborator Ping Chang (Texas A&M University).
Additional analysis of Atlantic-Pacific basin interaction has been performed and the results have been published in a peer-reviewed international journal with three project members as co-authors. Further efforts on interbasin-interaction have led to a paper that has been accepted for publication. Results from project-related activities were presented at several conferences, including conferences in Japan.
An international workshop was held at Kyushu University with participation from all project members.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Overall, the project has progressed very well. While the CESM simulations by the overseas collaborator are still in preparation, most aspects have gone to plan. Additional research efforts related to the project have led to one published and one accepted paper. Another paper resulting from research efforts in fiscal year 2023 was published. In addition, results from the project's research activities have been presented at several international conferences.
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| Strategy for Future Research Activity |
Given the overall smooth progress in the second year, we will continue to follow the research plan as set out in the research proposal. Completing the CESM experiments will have high priority. Once this has been accomplished, we will evaluate how well LIMs can replicate the behavior of this second GCM. If both the GFDL CM2.1 and CESM can be successfully replicated by LIMs, we will apply the LIM technique to an existing large data base of GCM simulations for comprehensive evaluation of the Atlantic-Pacific linkage. We plan to submit at least one manuscript on the outcomes from our experiments. An international workshop is planned to be held at the University of Tokyo.
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