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2018 Fiscal Year Final Research Report

Sulfur and nitrogen isotopes in a single particle of sulfate and nitrate aerosols in polar ice cores

Research Project

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Project/Area Number 16K12573
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Environmental dynamic analysis
Research InstitutionHokkaido University

Principal Investigator

Iizuka Yoshinori  北海道大学, 低温科学研究所, 助教 (40370043)

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。

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Published: 2020-03-30  

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