Seasonal features of ultrafine particle volatility in the coastal Antarctic troposphere 1National Institute of Polar Research, Tokyo, Japan
21 Sep 2011
2Department of Earth System Science, Faculty of Science, Fukuoka University, Fukuoka, Japan
3Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan
*now at: Department of Earth System Science, Faculty of Science, Fukuoka University, Fukuoka, Japan
**now at: Advances Materials Institute, Fukuoka University, Fukuoka, Japan
***now at: Research Institute for Sustainable Humanosphere, Kyoto University, Kyoto, Japan
Received: 04 March 2011 – Published in Atmos. Chem. Phys. Discuss.: 13 May 2011 Abstract. The size distribution and volatility of ultrafine aerosol particles were
measured using scanning mobility particle sizer and thermodenuder at Syowa
Station during the 46–47 Japanese Antarctic Research Expeditions
(2005–2007). The relative abundance of non-volatile particles in a 240 °C
scan was approximately 20% during the summer, whereas the abundance of
non-volatile particles increased by >90% during the winter–spring.
Most ultrafine particles were volatilized at temperature of 150–210 °C.
This volatility was consistent well to major aerosol constituents
(NH4+, SO42− and CH3SO3−) during the
summer. In contrast, major constituents of ultrafine particles were
sea-salts (Na+ and Cl−) in winter–spring. Therefore, the seasonal
feature of volatility of ultrafine particles at Syowa was associated with
seasonal variations of the major aerosol constituents. Although the relative
abundance of non-volatile particles was usually higher during the
winter–spring, the abundance dropped occasionally to <30%. The lower
abundance of non-volatile ultrafine particles during winter–spring
corresponded to the lower number concentration of ultrafine particles and
transport from the free troposphere over Antarctica.
Revised: 02 August 2011 – Accepted: 08 September 2011 – Published: 21 September 2011
Citation: Hara, K., Osada, K., Nishita-Hara, C., Yabuki, M., Hayashi, M., Yamanouchi, T., Wada, M., and Shiobara, M.: Seasonal features of ultrafine particle volatility in the coastal Antarctic troposphere, Atmos. Chem. Phys., 11, 9803-9812, doi:10.5194/acp-11-9803-2011, 2011.