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Mechanisms of stratospheric ozone depletion at high and middle latitudes

Research Project

Project/Area Number 11480131
Research Category

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

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental dynamic analysis
Research InstitutionThe University of Tokyo (2000)
Nagoya University (1999)

Principal Investigator

KOIKE Makoto  Graduate School of Science, The University of Tokyo, Associate Professor, 大学院・理学系研究科, 助教授 (00225343)

Co-Investigator(Kenkyū-buntansha) SUZUKI Katsuhisa  Yokohama National Univ., Faculty of Education, Professor, 教育学部, 教授 (60011764)
KONDO Yutaka  RCAST, The University of Tokyo, Professor, 先端科学技術研究センター, 教授 (20110752)
TAKEGAWA Nobuyuki  Nagoya Univ., STE Lab., Research Associate, 太陽地球環境研究所, 助手 (00324369)
村田 功  東北大学, 理学部, 助手 (00291245)
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥14,100,000 (Direct Cost: ¥14,100,000)
Fiscal Year 2000: ¥5,600,000 (Direct Cost: ¥5,600,000)
Fiscal Year 1999: ¥8,500,000 (Direct Cost: ¥8,500,000)
Keywordsstratospheric ozone / Arctic polar vortex / heterogeneous reactions / transport / FTIR
Research Abstract

Measurements of HF, HCl, ClONO2, HNO3, and O3 were made using the Ground-based FTIR instruments at Rikubetsu and Moshiri observatories on the island of Hokkaido, Japan, and at Kiruna Sweden since 1995. All these species observed in Japan show marked seasonal variations. Namely the column amounts are minimum in July-September and reach maximum values in February-April. These species are produced through photolysis of long lived trace species. The increases of the abundance of these species from fall to spring are basically due to poleward transport by planetary waves. In addition to the general increase of the column abundances in winter and spring, the variability is larger in these seasons. Based on the potential vorticity (PV) analysis, air mass in the polar vortex was occasionally transported to over the north part of Japan between February and April. On these cases, a decrease in the HCl/HF ratio and an increase in the ClONO2/HF ratio were observed. These results were consistent with those calculated using the three-dimensional chemistry and transport model (CTM) in which heterogeneous reactions on polar stratospheric clouds (PSCs) were included The observed day to day variation of O3 between January and April was generally in good agreement with that calculated using the CTM which included the heterogeneous reactions on PSCs. These CTM calculated O3 amounts were lower than those calculated without the heterogeneous reactions by 2 % at the end of March. When air mass in the polar vortex was transported to over Rikubetsu the difference was as large as 6 %. These results suggest the size of influence from the transport of air from the Arctic that was responsible for the ozone decrease observed at midlatitudes.

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] M.Koike, 他23名: "A comparison of Arctic HNO_3 profiles measured by ILAS and balloon-borne sensors"J.Geophys.Res.. 105. 6761-6772 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Koike, 他14名: "Impact of aircraft emissions on reactive nitrogen over the North Atlantic Flight Corridor region"J.Geophys.Res.. 105. 3665-3677 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Y.Kondo, 他3名: "Denitrification and nitrification in the Arctic stratosphere during the winter of 1996-1997"Geophys.Res.Lett.. 27. 339-340 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Y.Kondo, 他8名: "Partitioning of reactive nitrogen in the midlatitude lower stratosphere"Geophys.Res.Lett.. 105. 1417-1424 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Koike, 他10名: "Assessment of the uncertainties in the NO_2 and O_3 measurements by visible spectrometers"J.Atmos.Chem.. 32. 121-145 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Koike, M.et al.: "A comparison of Arctic HNO_3 profiles measured by ILAS and balloon-borne sensors"J.Geophys.Res.. 105. 6761-6772 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Koike, M.et al.: "Impact of aircraft emissions on reactive nitrogen over the North Atlantic Flight Corridor region"J.Geophys.Res.. 105. 3665-3677 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kondo, Y.et al.: "Denitrification and nitrification in the Arctic stratosphere during the winter of 1996-1997"Geophys.Res.Lett.. 27. 337-340 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kondo, Y.et al.: "Partitioning of reactive nitrogen in the midlatitude lower stratosphere"J.Geophys.Res.. 105. 1417-1424 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Koike, M.et al.: "Assessment of the uncertainties in the NO_2 and O_3 measurements by visible spectrometers"J.Atmos.Chem.. 32. 121-145 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Koike, 他23名: "A comparison of Arctic HNO_3 profiles measured by ILAS and balloon-borne sensors"J.Geophys.Res.. 105. 6761-6772 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Koike, 他14名: "Impact of aircraft emissions on reactive nitrogen over the North Atlantic Flight Corridor region"J.Geophys.Res.. 105. 3665-3677 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Koike, 他3名: "Denitrification and nitrification in the Arctic stratosphere during the winter of 1996-1997"Geophys.Res.Lett.. 27. 337-340 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Koike, 他8名: "Partitioning of reactive nitrogen in the midlatitude lower stratosphere"Geophys.Res.Lett.,. (in press). (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] M.Koike, 他10名: "Assessment of the uncertainties in the NO_2 and O_3 measurements by visible spectrometers"J.Atmos.Chem.. 32. 121-145 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] Koike,M., et al.: "A comparison of Arctic HNO_3 profiles measured by ILAS and balloon-borne sensors"Journal of Geophysical Research.

    • Related Report
      1999 Annual Research Report
  • [Publications] Koike, M., et al.: "Impact of aircraft emissions on reactive nitrogen over the North Atlantic Flight Corridor region"Geophysical Research Letters.

    • Related Report
      1999 Annual Research Report
  • [Publications] Kondo, Y., et al.: "Denitrification and nitrification in the Arctic stratosphere during the winter of 1996-1997"Geophysical Research Letters. 27. 337-340 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kondo, Y., et al.: "Partitioning of reactive nitrogen in the midlatitude lower stratosphere"Geophysical Research Letters.

    • Related Report
      1999 Annual Research Report
  • [Publications] Koike, M., et al.: "Assessment of the uncertainties in the NO_2 and O_3 measurements by visible spectrometers"J. Atmos. Chem.. 32. 121-145 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kondo, Y., et al.: "Impact of aircraft emissions on No_x in the lowermost stratosphere at northern midlatitudes"Geophysical Research Letters. 26. 3065-3068 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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