Water vapor measurements during snow crystal formations by the “FINEDEW” chilled mirror hygrometer

• MURAI Akio

  Kitami Institute of Technology Ishikawa Prefectural Institute for Education Research and In-service Training,

• TAKAHASHI Shuhei

  Kitami Institute of Technology

• KAMEDA Takao

  Kitami Institute of Technology

• MINAMI Yukiya

  Ishikawa Prefectural University

• IBATA Kazumasa

  Yamatake Corporation

Bibliographic Information

Other Title

• 鏡面冷却式露点計による人工雪結晶生成時の湿度測定
• キョウメン レイキャクシキ ロテンケイ ニ ヨル ジンコウ ユキケッショウ セイセイジ ノ シツド ソクテイ

Abstract

The experiment introduced in this paper was performed in order to measure humidity during snow crystal formation by using the FINEDEW chilled mirror hygrometer. FINEDEW is a micro chilled mirror hygrometer employing a pair of thin fiber optics, which enables the real-time measurement of dew point temperatures by keeping the mirror close to the fiber line that generates the snow crystals. The results of this experiment have clarified that it is possible to measure dew point temperatures between -5℃ and -40℃ by this device. In comparison with the previous report by Nakaya (1954), the humidity measured by the FINEDEW is a few percent lower than his report. We propose that the difference is caused by the fact that we measure water vapor in the air, while Nakaya (1954) measured water vapor and liquid water droplets in the air. This paper also presents the principles and features of the humidity measuring system employing FINEDEW.

Journal

• Journal of the Japanese Society of Snow and Ice

  Journal of the Japanese Society of Snow and Ice 73 (1), 3-14, 2011

  The Japanese Society of Snow and Ice

Keywords

• artificial snow crystals
• chilled mirror hygrometer
• water vapor measurements

Details

• CRID: 1390011461952029568
• NII Article ID: 10027882185
• NII Book ID: AN00131221
• DOI: 10.5331/seppyo.73.1_3
• ISSN: 18836267
• ISSN: 03731006
• NDL BIB ID: 11004201
• Web Site: https://kitami-it.repo.nii.ac.jp/records/8079
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11004201
• Web Site: https://www.jstage.jst.go.jp/article/seppyo/73/1/73_3/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed