| Project/Area Number |
20J21145
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 国内 |
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| Review Section |
Basic Section 17030:Human geosciences-related
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| Research Institution | The University of Tokyo |
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Principal Investigator |
BEHRENS BETHANY 東京大学, 総合文化研究科, 特別研究員(DC1)
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| Project Period (FY) |
2020-04-24 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 2022: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2021: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2020: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | Antarctica / Beryllium / Ice sheet / Holocene / Tasmania / beryllium isotopes / radiocarbon / glacial cycles / East Antarctica / beryllium / cosmogenic isotopes / glacial discharge |
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| Outline of Research at the Start |
Phase I) Analyze freshwater discharge through ice shelf melt from Wilkes Subglacial Basin, Antarctica, and correlate the data to past climate variability.
Phase II) Collect information about past climate patterns which may have increased Southern Ocean upwelling, leading to warmer surface ocean temperatures and melting of marine-based ice sheets.
Phase III) Determine freshwater output from Aurora Subglacial Basin, Antarctica, to determine any periods of oceanic or atmospheric warming related to climate variations revealed in Phase II which may have affected ice sheet discharge through melting.
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| Outline of Annual Research Achievements |
Phase 1: Preparation of the high resolution Adelie Basin, East Antarctica samples has been completed, and analysis of beryllium isotopes by accelerator mass spectrometry is finished. A manuscript detailing the high resolution dataset is being prepared for submission to a scientific journal.
Phase 2: Additional samples from the Sabrina Coast region of East Antarctica have been analyzed by accelerator mass spectrometer for beryllium isotopes. Comparison to a nearby core at a shallower depth reveal some interesting differences in the data, despite the proximity of the core sites. The results are under discussion with coauthors, and the data was presented at the Japan Geosciences Union meeting and the Geological Society of America meeting in poster form.
Phase 3: Samples from Lake Selina in the West Coast Range of Tasmania have been analyzed by accelerator mass spectrometry, covering the past five marine isotope stages (MIS 1-5). With a greater sample number, it has been interesting to see a stronger climate signal than expected. The results from this analysis were presented at the Geological Society of America meeting as an oral presentation, and the manuscript is complete and under discussion with coauthors. It will shortly be submitted to a scientific journal.
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| Research Progress Status |
令和4年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和4年度が最終年度であるため、記入しない。
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Report
(3 results)
Research Products
(10 results)
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[Journal Article] Efficient radiocarbon measurements on marine and terrestrial samples with single stage Accelerator Mass Spectrometry at the Atmosphere and Ocean Research Institute, University of Tokyo2022
Author(s)
Yokoyama Y., Miyairi Y., Aze T., Sawada C., Ando Y., Izawa S., Ueno Y., Hirabayashi S., Fukuyo N., Ota K., Shimizu Y., Zeng Y., Lan H., Tsuneoka R., Ando K., Nemoto K., Obrochta S., Behrens B., Tam E., Leggett K., Rzeszewicz J., Huang Z., Kondo R., Nagata T.
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Journal Title
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Volume: 532
Pages: 62-67
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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