Japan Geoscience Union Meeting 2019

Presentation information

[J] Poster

A (Atmospheric and Hydrospheric Sciences ) » A-AS Atmospheric Sciences, Meteorology & Atmospheric Environment

[A-AS04] Atmospheric Chemistry

Thu. May 30, 2019 1:45 PM - 3:15 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Tomoki Nakayama(Graduate School of Fisheries and Environmental Sciences, Nagasaki University), Yoko Iwamoto(Graduate School of Biosphere Science, Hiroshima University), Sakae Toyoda(Department of Chemical Science and Engineering, Tokyo Institute of Technology), Nawo Eguchi(Kyushu University)

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

*Takuma Miyakawa1, Yuichi Komazaki1, Fumikazu Taketani1, Xiaole PAN2, Zifa Wang2, Yugo Kanaya1 (1.Japan Agency for Marine-Earth Science and Technology, 2.Institute for Atmospheric Physics, Chinese Academy of Science)

Keywords:Carbonaceous aerosols, Radiocarbon analysis, Source attribution

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.