2022 Fiscal Year Final Research Report

The application of thick annually lake deposits in Finland as Anthropocene high-resolution environmental archives

Research Project

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Project/Area Number	20K20729
Research Category	Grant-in-Aid for Challenging Research (Exploratory)
Allocation Type	Multi-year Fund
Review Section	Medium-sized Section 4:Geography, cultural anthropology, folklore, and related fields
Research Institution	Shimane University (2022) Kyushu University (2020-2021)
Principal Investigator	KASHIMA KAORU 島根大学, エスチュアリー研究センター, 客員研究員 (90192533)
Co-Investigator(Kenkyū-buntansha)	福本侑島根大学, エスチュアリー研究センター, 客員研究員 (20772974) 山田和芳早稲田大学, 人間科学学術院, 教授 (60508167)
Project Period (FY)	2020-07-30 – 2023-03-31
Keywords	年縞湖沼堆積物 / 完新世 / 人新世 / 珪藻遺骸群集 / 長期的気候変動復元 / 破局的気候急変 / 大規模噴火 / 地球温暖化
Outline of Final Research Achievements	In Finland, there are plenty freshwater lakes where seasonal lake environmental changes were recorded as annually laminated deposits. We surveys at the following three lakes in the central Finland to reconstruct high resolution environmental histories using annually laminate time setting of the deposits. Our target was about these 2000 years to presume anthropogenic impacts and global climatic impacts during the Roman Warm Period, the Great Migration Period, the Medieval Warm Period, the Little Ice Age and the Global Warming. The survey lakes located in eastern-central part of Finland, were listed as follows;　Lake Kalio-Kourjarvi (438samples; about 9 years’ interval, until the base of the core, dated BC3397.), Lake Lehmilampijarvi (402 samples; about 4.5 years’ interval, until BC37), Lake Korttajarvi (146 samples; about 9 years’ interval, until AD121)
Free Research Field	自然地理学
Academic Significance and Societal Importance of the Research Achievements	本研究の成果は、福井県年縞博物館を通じ、その展示活動および社会教育活動に活用される。これらの活動を通じて、研究者のみならず学生生徒や市民に対して、環境問題への興味を深め、地球環境保全の重要性を訴えることができる。若手研究者養成への貢献（若手研究者養成への取組、成果）としては、Turku大学博士課程大学院生2名、Sarianna Salminen及び Mira Tammelinの博士論文最終審査（2022年7月実施）に参加し、彼らの博士論文成果の取りまとめに寄与した。