Secondary organic aerosol formed during the transboundary air transport

Abstract

At this talk, the speaker presents the results of field studies in the Kyusyu/Okinawa region for the elucidation of secondary organic aerosol (SOA) in the real atmosphere. In the studies the semi-real time measurements using aerosol mass spectrometry and offline analysis for concentration and stable carbon isotope ratio of low-volatile water soluble organic carbon (LV-WSOC) were performed. The resutls demonstrated a high correlation between the strength of a fragment ion from carboxylic acid and the concentration of LV-WSOC. Data analysis suggested that the carboxlic acid and LV-WSOC are likely SOA origin. Furthermore, the analysis implied that the LV-WSOC also contained some extent of LV-WSCO from an unknown different origin.