References

ACP

Atmospheric Chemistry and Physics

ACP

1680-7324

Copernicus GmbH

Göttingen, Germany

10.5194/acp-11-9803-2011

Seasonal features of ultrafine particle volatility in the coastal Antarctic troposphere

Hara

¹ ⁴ Osada

³ Nishita-Hara

³ ⁵ Yabuki

¹ ⁶ Hayashi

² Yamanouchi

¹ Wada

¹ Shiobara

National Institute of Polar Research, Tokyo, Japan

Department of Earth System Science, Faculty of Science, Fukuoka University, Fukuoka, Japan

Graduate 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

21 09 2011

11 18 9803 9812

This is an open-access article ditributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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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.

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