High resolution reconstruction of intermediate and deep water environment in the North Pacific since the last glacial maximum
| Project/Area Number |
26400504
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Stratigraphy/Paleontology
|
|---|
| Research Institution | Kobe University |
|---|
Principal Investigator |
Ohkushi Ken'ichi 神戸大学, 人間発達環境学研究科, 准教授 (10312802)
|
|---|
| Project Period (FY) |
2014-04-01 – 2018-03-31
|
| Project Status |
Completed (Fiscal Year 2017)
|
| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
|
|---|
| Keywords | 底生有孔虫 / 北太平洋 / 最終氷期 / 酸素同位体比 / 海底コア / 北太平洋中層水 / 有孔虫 / ヤンガードリアス / 海底堆積物 / 放射性炭素年代 / 親潮 / 古海洋 / 太平洋 / 中層水 |
|---|
| Outline of Final Research Achievements |
1) We analyzed foraminiferal oxygen and carbon isotopes from a sediment core sampled at a water depth of 777 m to evaluate the intensity and depth distribution of the origin water of NPIW since the last deglaciation in the Oyashio region. The benthic foraminiferal delta-O-18 in the core increased by 0.3‰ to 0.4‰ from the end of the Bolling/Allerod warm episode to the Younger Dryas cold episode, suggesting that benthic oxygen isotope recorded intermediate water cooling.
2) We studied deep-sea benthic foraminiferal fauna during the last 187 kyr in core NGC108 (3390 m water depth) collected from the Shatsky Rise, central northwestern Pacific, to determine a relationship between benthic foraminifera and paleoproductivity in the transitional zone between the subtropical Kuroshio Extension and the subarctic current. Cassidulina reniforme, Eilohedra levicula, and Epistominella exigua were the abundant species.
|
Report
(5 results)
Research Products
(6 results)
