• 発行日: 2021年09月20日 受付日: 2021年02月02日 J-STAGE公開日: 2021年10月08日 受理日: 2021年04月23日 早期公開日: - 改訂日: -

(EndNote、Reference Manager、ProCite、RefWorksとの互換性あり)

(BibDesk、LaTeXとの互換性あり)

We simultaneously measured the chemical composition of aerosol at three different sites in the Kyushu and Okinawa area in Japan during spring in 2016. Chinese emissions had decreased significantly since 2013. At all sites, the main species observed were sulfate and organics, with fractions of 60–80%. Nitrate was barely observed at Cape Hedo in Okinawa, while it accounted for over 10% on Fukue Island in Nagasaki and in Fukuoka City. The mass spectra of organic species observed were analyzed using the positive matrix factorization (PMF) method. Low-volatile oxygenated organic aerosol (LV-OOA) was the main component at all sites, with fractions of over 50%. Although Chinese emissions were significantly decreased since 2013, all three sites remained affected by the long-range transport of air pollutants from the Chinese continent.

• X