日本地球惑星科学連合2019年大会

講演情報

[J] ポスター発表

セッション記号 A (大気水圏科学) » A-AS 大気科学・気象学・大気環境

[A-AS04] 大気化学

2019年5月30日(木) 17:15 〜 18:30 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:中山 智喜(長崎大学 大学院水産・環境科学総合研究科)、岩本 洋子(広島大学 生物圏科学研究科)、豊田 栄(東京工業大学物質理工学院)、江口 菜穂(Kyushu University)

[AAS04-P04] Characterization of carbonaceous aerosols in East Asia in the spring of 2015: Importance of non-fossil fuel sources

*宮川 拓真1駒崎 雄一1竹谷 文一1潘 小楽2王 自発2金谷 有剛1 (1.国立研究開発法人海洋研究開発機構、2.中国科学院大気物理研究所)

キーワード:炭素性エアロゾル、放射性炭素同位体分析、発生源解析

The sources of elemental (EC) and organic carbon (OC) aerosols in the spring of 2015 in Asian outflow were investigated in terms of the radiocarbon (14C) for carbonaceous aerosols and organic molecular marker analyses. The contribution of fossil fuel (FF) sources to total carbonaceous aerosols (TC) significantly increased in polluted air masses with enhancements of carbon monoxide concentrations. For EC, FF sources dominated in the polluted air masses. For OC, the contributions of non-FF and non-biomass burning (BB) sources were found to be significant (comparable to or higher than those of FF sources), especially in the air masses with higher values of both the ratio of water-soluble fraction of OC (fWSOC) and 14C concentrations (F14C). Positive correlation between fWSOC and F14C indicates that the origins of TC (mainly OC) have great effects on the variabilities in the water solubility and the following climatic impacts (i.e., cloud formation process) of OC in the regional scale within the time scale of a week. Multivariate analyses using metallic and ionic tracers revealed the insights into the characteristics of classified carbonaceous aerosols in Asian outflow.