| Project/Area Number |
25340100
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Environmental risk control and evaluation
|
|---|
| Research Institution | University of Shizuoka |
|---|
Principal Investigator |
Sakata Masahiro 静岡県立大学, 融合科学研究科(研究院), 教授 (20371354)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
Kohji Marumoto 国立水俣病総合研究センター, 主任研究員 (90371369)
|
|---|
| Project Period (FY) |
2013-04-01 – 2016-03-31
|
| Project Status |
Completed (Fiscal Year 2015)
|
| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
|
|---|
| Keywords | 黄砂 / トレーサー / リチウム同位体 / ストロンチウム同位体 / 大気汚染 / 越境輸送 / 黄砂粒子 / 化学トレーサー / 後方流跡線解析 / 人為発生源 |
|---|
| Outline of Final Research Achievements |
Chemical tracers are useful to clarify the sources of kosa particles in the Asian continent and their transportation routes. In this study, focusing on lithium isotopes, which are fractionated easily in nature, daily variations in Li concentration and δ7Li were measured for aerosol samples collected in western Kyushu in spring, when amount of kosa particles transported increase. It was found that δ7Li values of 1% HNO3 soluble Li in the samples increase with increasing in leachability of Li (=1% HNO3 soluble Li concentration/total Li concentration). This suggests a possibility that δ7Li values of 1% HNO3 soluble Li reflect differences in soil properties in regions occurring kosa. Hence, δ7Li is resonable to expect as a simple tracer of kosa, because it can be easily measured by quadrupole ICP-MS, which is currently widely used as a tool for trace element analysis.
|
