Reconstructing Kuroshio transport during last 100 years using geochemical proxies on coral skeletons

2014 Fiscal Year Final Research Report

• Project/Area Number: 24310001
• 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: Hokkaido University
• Principal Investigator: WATANABE Tsuyoshi 北海道大学, 理学(系)研究科(研究院), 講師 (80396283)
• Co-Investigator(Renkei-kenkyūsha): IKEDA Masataka 北海道大学, 高等教育機能開発総合センター, 技術専門職員 (00621517) ; MIYAJI Tuzumi 北海道大学, 大学院理学研究院, 博士研究員 (40623062)
• Research Collaborator: YAMAZAKI Atuko 東京大学, 大気海洋研究所, 特別研究員 (40723820)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: サンゴ骨格 / 栄養塩 / 黒潮

Outline of Final Research Achievements

We have reconstructed the change in Kuroshio transport during last 100 years using the coral skeletons from four different areas in north Pacific of Kuroshio regions (Luetao island, Taiwan, Koshiki island, Kagoshima, Tatsukushi, Kouchi, Kushimoto, Wakayama). We applied the oxygen isotopes, strontium/calcium ratio, nitrogen isotopes on coral skeletons to estimate the past changes of salinity, temperature, and nutrient with weekly to monthly temporal resolution and discussed the relationship during last 100 among the Kuroshio behavior, global warming, and regional climate systems, including ENSO and PDO.

Free Research Field

複合新領域