2018 Fiscal Year Final Research Report
Sulfur and nitrogen isotopes in a single particle of sulfate and nitrate aerosols in polar ice cores
Project/Area Number |
16K12573
|
Research Category |
Grant-in-Aid for Challenging Exploratory Research
|
Allocation Type | Multi-year Fund |
Research Field |
Environmental dynamic analysis
|
Research Institution | Hokkaido University |
Principal Investigator |
|
Research Collaborator |
Uemura Ryu
Sano Yuji
Kagoshima Shogo
Ando Takuto
|
Project Period (FY) |
2016-04-01 – 2019-03-31
|
Keywords | エアロゾル / 同位体比 / アイスコア / 個別粒子 |
Outline of Final Research Achievements |
In order to measure sulfur and nitrogen isotopes in a single particle of sulfate and nitrate aerosols in polar ice cores, we collected particles on a mesh from ice cores. Then, we measured sulfur isotopes of the single particles. As a result, the average isotope values are about 22 ‰, which is reasonable result for natural sulfate aerosols, however with large error of about 10 ‰.
|
Free Research Field |
雪氷学
|
Academic Significance and Societal Importance of the Research Achievements |
エアロゾルは小さな個体粒子(もしくは液滴)からなり、地球表面気温に影響を与える。アイスコアには過去のエアロゾルが保存されている。エアロゾルの同位体比を分析することでエアロゾルの起源を推定できるが、これまで粒子一粒ごとの同位体比の分析は困難であった。本研究はナノシムスという装置をアイスコアに含まれる過去のエアロゾルに適用し、硫酸塩エアロゾルの粒子一粒ごとの硫黄同位体比の分析に成功した。
|