2011 Fiscal Year Final Research Report
Subsurface water mass variations in the Kuroshio region inferred from 14C age difference of planktic foraminifers with different depth habitat
| Project/Area Number |
22654061
|
|---|
| Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Stratigraphy/Paleontology
|
|---|
| Research Institution | Kochi University |
|---|
Principal Investigator |
IKEHARA Minoru 高知大学, 教育研究部・自然科学系, 准教授 (90335919)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
YOKOYAMA Yusuke 東京大学, 大気海洋研究所, 准教授 (10359648)
|
|---|
| Project Period (FY) |
2010 – 2011
|
| Keywords | 14C年代差 / 環境変動 / 気候変動 / 有孔虫 / 黒潮 / 亜熱帯循環 |
|---|
| Research Abstract |
The differences in^<14> C age andδ^<18> O between surface and subsurface planktic foraminifers are reconstructed at the piston cores from the Kuroshio region and the subtropical gyre in the Northwest Pacific. Although there is no systematic difference of^<14> C ages during the Holocene,^<14> C age differences exceeding 1000 years are clearly observed in the sediment cores during the last deglaciation and the last glacial maximum(LGM). To establish an age model of marine core in the Northwest Pacific, it necessary to measure^<14> C age only using a surface water species.
|
