Cloud Condensation Nuclei and Immersion Freezing Abilities of Al₂O₃ and Fe₂O₃ Particles Measured with the Meteorological Research Institute's Cloud Simulation Chamber

• KUO Tzu-Hsien

  Meteorological Research Institute, Tsukuba, Japan

• MURAKAMI Masataka

  Meteorological Research Institute, Tsukuba, Japan Institute for Space-Earth Environmental Research, Nagoya University, Nagoya, Japan

• TAJIRI Takuya

  Meteorological Research Institute, Tsukuba, Japan

• ORIKASA Narihiro

  Meteorological Research Institute, Tsukuba, Japan

書誌事項

タイトル別名

• Cloud Condensation Nuclei and Immersion Freezing Abilities of Al₂O₃ and Fe₂O₃ Particles Measured with the Meteorological Research Institute's Cloud Simulation Chamber

抄録

 Aluminum oxide (Al₂O₃) and iron oxide (Fe₂O₃) particles have been observed not only in industrial areas and their surroundings, but also in natural atmospheric environments. These types of aerosols can influence aerosol–cloud interactions. In this study, physicochemical properties such as size distribution and the ability to act as cloud condensation nuclei (CCN) as well as ice nucleating particles (INPs) of surrogates of ambient Al₂O₃ and Fe₂O₃ particles were investigated using a CCN counter, the Meteorological Research Institute's (MRI) cloud simulation chamber, the MRI's continuous-flow-diffusion-chamber-type ice nucleus counter (CFDC-type INC), and an array of aerosol instruments. The results indicated that their hygroscopicity parameter (κ-value) ranged from 0.01 to 0.03. This range is compatible with that of surrogates of mineral dust particles and is smaller than typical κ-values of atmospheric aerosols. On the other hand, based on their ice nucleation active surface site (INAS) densities, these materials may act as effective INPs via immersion freezing (i.e., ice nucleation triggered by particles immersed in water droplets). In the cloud chamber experiments, Al₂O₃ and Fe₂O₃ particles continuously nucleated ice crystals at temperatures below −14°C and −20°C, respectively. This result indicates that the Al₂O₃ particles were better INPs than the Fe₂O₃ particles were. Moreover, the INAS density of the Al₂O₃ particles was comparable to that of natural ambient dust.

収録刊行物

• 気象集誌. 第2輯

  気象集誌. 第2輯 97 (3), 597-614, 2019

  公益社団法人 日本気象学会

キーワード

• hygroscopicity
• activated fraction
• ice nucleation active surface site density
• immersion freezing
• CFDC-type ice nucleus counter

詳細情報

• CRID: 1390001288144454016
• NII論文ID: 130007660917
• NII書誌ID: AA00702524
• DOI: 10.2151/jmsj.2019-032
• ISSN: 21869057
• ISSN: 00261165
• NDL書誌ID: 029756948
• Web Site: http://id.ndl.go.jp/bib/029756948
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I029756948
• Web Site: https://www.jstage.jst.go.jp/article/jmsj/97/3/97_2019-032/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可