• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Experimental study on the micro-physical process of ozone-hole depression by ice crystals in PSC

Research Project

Project/Area Number 05455001
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 広領域
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

FURUKAWA Yoshinori  HOKKAIDO UNIV.ILTS.LOW TEMPERATURE SCIENCE,ASSOCIATE PROFESSOR, 低温科学研究所, 助教授 (20113623)

Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥4,900,000 (Direct Cost: ¥4,900,000)
Fiscal Year 1994: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1993: ¥3,700,000 (Direct Cost: ¥3,700,000)
KeywordsOzone hole / Polar stratosheric cloud / Ice crystals / Ellipsometry / Second harmonic generation / Molecular dynamics simulation / Surface transition layr / Fluorocarbon / フロンガス / 氷結晶 / 表面構造 / 表面融解 / 極成層圏雲 / オゾン層
Research Abstract

1. Ozone-hole depression in the stratospheric atmosphere is enhanced by the ice crystals which are formed in the Polar Stratospheric Cloud (PSC). In order to measure the decomposition rate of ozone molecules on the ice crystal surfaces, an experiment was carried out using a newly developed chamber, which was combine with the optical detectors for the ice surface structures, such as an ellipsometer and a Surface Second Harmonic Generation (SSHG). specially, the SSH signal was first detected from the ice crystal surface, which was prepared by the negative-crystal method and molecularly flat. As a result, we claim that it was made possible to carry out the quantitative measurements for the decomposition rate of ozone molecules on the ice crystal surfaces.
2. The physical process of the decomposition of ozone molecules on the ice crystal surfaces relates to the ice surface structures in molecular-level. A molecular dynamics simnlation for the ice surface was carried out in the wide temperature range. As a result, a thin transition layr with the disordered arrangement of water molecules was detected. Water molecules in such the transition layr may react to the HCl or CIONO_2 molecules, which are formed by the decomposition of fluorocarbon molecules in the stratosheric atmosphere. On the other hand, the molecular dynamics simulation for the ice/water (namely, ice/transition layr) interface also was carried out and we found the anisotropic properties for the difference of crystallographic orientations. This result means that the activity of ice crystals for the decomposition of ozone molecules may depend on the ice crystal shape.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] Y.Furukawa: "Temperature dependence of the growth form of negative crystal in an ice single crystal and evaporation kinetics for its surface" J.Crystal Growth. 129. 571-581 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Furukawa: "Direct evidence for melting transition at interface between ice crystal and glass substrate" J.Crystal Growth. 128. 1137-1142 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Nada: "Molecular dynamics study of surface melting on ice crystal" in The Structure of Surfaces. □. 543-547 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Furukawa: "Experimental study on the melting transition at interface between Ice and substrate" in The Structure of Surfaces. IV. 511-516 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Nada: "Molecular dynamics simulations of ice crystal surfaces at temperatures just below the melting point" in Advanced Materials '93. 16A. 453-445 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 古川義純: "氷結晶の表面・界面遷移層の構造とその動的性質" 日本結晶成長学会誌. 21. S521-S528 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Nada: "Anisotropic Properties of Ice/water Interface:A Molecular Dynamics Study" Jpn.J.Appl.Phy.34. 583-588 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Nada: "Anisotropic growth kinetics of ice crystals from water studied by molecular dynamics simulation" J Crystal Growth.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Furukawa and S.Kohata: "Temperature dependence of the growth form of nagative crystal in an ice single crystal and evaporation kinetics for its surface" J.Crystal Growth. 129. 571-581 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Furukawa and I.Ishikawa: "Direct evidence for melting transition at interface between icecrystal and glass substrate" J.Crystal Growth. 128. 1137-1142 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Nada and Y.Furukawa: "Molecular dynamics study of surface melting on ice crystal" in The Structure of Surfaces IV,ed.S.Y.Tong et al.(World Scientific). 543-547 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Furukawa, I.Ishikawa, M.Maruyama and J.G.Dash: in The Structure of Surfaces IV,ed.S.Y.Tong et al.(World Scientific). 511-516 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Nada and Y.Furnkawa: "Molecular dynamics simulations of ice crystal surfaces at temperatures justbelow the melting point" in Advanced Materials '93, III,ed.Doyama et al.Elsevior. Vol.16A. 453-445 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Y.Furukawa, H.Nada, T.Ishizaki: "Sturucture and dynamicproperties of transition layrs at surface and interfaces of ice crystals" J.Jpn Assoc.Cryst.Growth. 21 (in Japanese). S521-S528 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Nada and Y.Furukawa: "Anisotropic properties of ice/water interface : Molecular" J.Jpn Appl.Phy. 34. 583-588 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Nada and Y.Furukawa: "Anisotropic growth kinetics of ice crystals from water studied by molecular dynamics simulation" J.Crystal Growth. submitted.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Nada: "Arisotropic Properties of Ice/water Interface:A Molecular Dynamics Study" Jpn.J.Appl.Phy.34. 583-588 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Furukawa: "Experimental study on the melting transition at interface between Ice and substrate" in The Structure of Surfaces. IV. 511-516 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Yoshinori Furukawa,Shigetsugu Kohata: "Temperature dependence of the growth form of negative crystal in an ice sigle crystal and evaporation kinetics for its surface" Journal of Crystal Growth. 129. 571-581 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Hiroki Nada and Yoshinori Furukawa: "Molecular dynamics study of ice-water interface" Proceedings of the 7th Topical Meeting on Crystal Growth Mechanism. 447-451 (1994)

    • Related Report
      1993 Annual Research Report

URL: 

Published: 1993-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi