North American ice sheet dynamics and marine paleoenvironmental changes from the sedimentary record in the Gulf of Alaska

2016 Fiscal Year Final Research Report

• Project/Area Number: 26281006
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: Nagoya University
• Principal Investigator: Suto Itsuki 名古屋大学, 環境学研究科, 准教授 (80432227)
• Co-Investigator(Kenkyū-buntansha): 今野 進 九州大学, 理学(系)研究科(研究院), 研究員 (00553405) ; 芦 寿一郎 東京大学, 新領域創成科学研究科, 准教授 (40251409) ; 松崎 賢史 国立研究開発法人産業技術総合研究所, 地質情報研究部門, 研究員 (50728582) ; 沢田 健 北海道大学, 理学(系)研究科(研究院), 准教授 (20333594)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 海洋環境動態 / 北太平洋 / アラスカ湾 / 氷床変動 / テクトニクス / 酸素同位体比変動 / 海洋生態系

Outline of Final Research Achievements

This study has demonstrated the linkage among the development of North American ice sheet, the erosion history on land, and the changes of microfossils during the last one million years using continuous sediment materials from the Gulf of Alaska (IODP Sites U1417, U1418 and U1419). Common presence of planktic foraminifers in subject cores permits to establish the orbital-scale oxygen isotope stratigraphy during last 1.0 million years ago in the Gulf of Alaska. The climate-ice sheet interactions were also investigated using a number of proxies including the diatom and radiolarian assemblages, the geochemical characteristics, and the physical properties of the sediments.

Free Research Field

古環境学