Lower tropospheric vertical distribution of aerosol particles over Syowa Station, Antarctica from spring to summer 2004

元データ 国立極地研究所

概要

Vertical distributions of atmospheric aerosol particles were measured nine times up to 5200 m a.s.l. using an aircraft over Syowa Station, East Antarctica during September-December 2004. Measurements were made for number concentrations of condensation nuclei (CN, Dp>10 nm), number-size distribution larger than 0.3 μm diameter, air temperature, humidity, and GPS position. During spring, the vertical profile of CN concentration showed large variability (100-1000 cm^(-3)), but it was mostly constant in summer. Vertical profiles of number-size distribution larger than 0.3 μm showed a systematic shift at altitudes greater than 4000 m. Both concentrations of aerosol number for Dp>0.3 μm and integrated volume between 0.3 and 1.0 μm showed constantly lower values at altitudes greater than 4000 m. These data suggest that the shift of aerosol parameters results from depletion of coarse particles such as sea salts. Maximum concentrations of the volume and CN were obtained respectively from the profiles on 7 October and 29 November 2004. These events are interpreted as sources and transport processes based on synoptic meteorological data, an ocean color index produced by SeaWiFS, and backward air trajectory analysis.

著者

Wada Makoto National Institute For Polar Research
Yamanouchi Takashi Geosystems Inc.
Yamanouchi Takashi National Institute For Polar Research
Osada Kazuo Meteorological Research Institute
Hara Keiichiro National Institute Of Polar Research
Hara Keiichiro Department Of Applied Chemistry Faculty Of Science Science University Of Tokyo:(present Address)sola
Osada Kazuo Graduate School of Environmental Studies, Nagoya University
Hara K Nagoya Univ. Nagoya
Matsunaga Katsuji Graduate School Of Environmental Studies Nagoya University
Matsunaga Katsuji Solar-terrestrial Environment Laboratory Nagoya University
Yamanouchi Takashi National Institute Of Polar Research Organization Of Information And Systems
Wada M National Institute Of Polar Research
Yamanouchi T Graduate Univ. Advanced Studies Tokyo
Osada Kazuo Graduate School Of Environmental Studies Nagoya University
Osada K Graduate School Of Environmental Studies Nagoya University
Yamada T Geosystems Inc.
Yamanouchi Takashi National Inst. Of Polar Res. And Dep. Of Polar Sci. The Graduate Univ. For Advanced Studies 10-3 Mid
Matsunaga K Graduate School Of Environmental Studies Nagoya University
Wada Makoto National Inst. Polar Res. Tokyo

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