Seasonal variation and volatility of ultra-fine particles in coastal Antarctic troposphere
2010
Author
Keiichiro Hara (National Institute of Polar Research), Kazuo Osada (Graduate School of Environmental Studies, Nagoya University), Chiharu Nishita-Hara (Graduate School of Environmental Studies, Nagoya University), Masanori Yabuki (National Institute of Polar Research), Masahiko Hayashi (Department of Earth System Science, Faculty of Science, Fukuoka University), Takashi Yamanouchi (National Institute of Polar Research), Makoto Wada (National Institute of Polar Research), Masataka Shiobara (National Institute of Polar Research)
Abstract
The Size distribution and volatility of ultrafine aerosol particles were measured at Syowa Station during the 46-47 Japanese Antarctic Research Expeditions. During the summer, most of the ultrafine particles were volatile particles, which were composed of H_2SO_4, CH_3SO_3H and sulfates bi-sulfates. The abundance of non-volatile particles was ～ 20% during the summer, increasing to>90% in winter-spring. Non-volatile particles in winter were dominantly sea-salt particles. Some ultrafine sea-salt particles might be released from sea-ice. When air mass was transported from the free troposphere over the Antarctic continent, the abundance of non-volatile particles dropped to<30% even in winter.
DOI
Journal
Antarctic Record
Source
DOAJ