2013年6月
Structural analysis of aerosol particles by microscopic observation using a time-of-flight secondary ion mass spectrometer
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
- 巻
- 118
- 号
- 12
- 開始ページ
- 6726
- 終了ページ
- 6737
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1002/jgrd.50477
- 出版者・発行元
- AMER GEOPHYSICAL UNION
The chemical composition and structure of fine aerosol particles with diameters of less than 1 mu m were analyzed in the spring of 2011 at Fukue Island, Japan, using an aerosol quadrupole mass spectrometer (Q-AMS, Aerodyne Research, Inc.) and a time-of-flight secondary ion mass spectrometer (TOF-SIMS). The Q-AMS results were similar to those of previous studies conducted at the same location, suggesting that the composition we observed is typical of this site. Based on the TOF-SIMS results, we classified the fine aerosol particles into three types: Type A, in which sulfate was covered with organic matter (OM); Type B, in which soil-containing particles with a diameter of 0.5 mu m were associated with sulfate and OM; and Type C, in which black carbon (BC) and sulfate aggregates were associated with OM. During the observation period, the relative abundances of Type A, B, and C particles were 55%, 20%, and 25%, respectively. The structure, chemical composition, and the proportion of each type of particles provide information for a more representative particle model in radiative models. The relative abundance of Type C, i.e., BC-containing particles, is quite different to that in Tokyo, suggesting that Type C could be an indicator of transboundary air pollution, in this case from mainland China.
- リンク情報
- ID情報
-
- DOI : 10.1002/jgrd.50477
- ISSN : 2169-897X
- Web of Science ID : WOS:000322129600060