Vegetation-ocean-atmosphere linkages during the last 400 ka based on a pollen record from the IODP site U1429 in the East China Sea

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K12316
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 63010:Environmental dynamic analysis-related
• Research Institution: Lake Biwa Museum
• Principal Investigator: Hayashi Ryoma 滋賀県立琵琶湖博物館, 研究部, 主任学芸員 (60636067)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 環境変動 / 古生態 / 森林動態 / 花粉分析 / 因果推論 / モンスーン変動 / 海洋変動 / 東シナ海

Outline of Final Research Achievements

This study examined the vegetation response to climate changes related to the East Asian monsoon and ocean currents during the glacial-interglacial cycles since the last 400 ka based on a new pollen record from Integrated Ocean Drilling Program Site U1429, situated in the East China Sea. Additionally, direct comparisons and causal inferences between the pollen record and other oceanographic proxies from IODP Site 1427, situated off the northern coast of the Honshu Island in western Japan, demonstrate the orbital-scale vegetation changes in this area and their land-ocean-atmosphere linkages during the last 550 ka.

Free Research Field

古生態学 森林動態 花粉分析

Academic Significance and Societal Importance of the Research Achievements

将来の温暖化による植生影響を予測するためには、植生と大気・海洋システムとの因果関係の把握が必要である。本研究では、過去の氷期-間氷期変動における多様な温暖気候化における植生の応答を解明し、植生と海流・モンスーンとの因果関係を把握することができた。過去の温暖期におきた環境変遷の解析をとおして、将来の温暖化による日本の植生への影響について正確な予測に貢献する知見を得ることができた。