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2000 Fiscal Year Final Research Report Summary

Development of calibration instrument for precise stratospheric and tropospheric ozone measurement

Research Project

Project/Area Number 11680526
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental dynamic analysis
Research InstitutionTHE UNIVERSITY OF TOKYO

Principal Investigator

KITA Kazuyuki  The University of Tokyo, research center for advanced science and technology, Research associate, 先端科学技術研究センター, 助手 (30221914)

Co-Investigator(Kenkyū-buntansha) KOIKE Makoto  The University of Tokyo, Graduate school of Science, Associate professor, 大学院・理学系研究科, 助教授 (00225343)
IWAGAMI Naomoto  The University of Tokyo, Graduate school of Science, Associate professor, 大学院・理学系研究科, 助教授 (30143374)
Project Period (FY) 1999 – 2000
Keywordsozone / stratospheric chemistry / tropospheric chemistry / instrumentation
Research Abstract

To investigate the ozone decrease in the lower stratosphere and ozone increase in the upper troposphere, the precision of the measurement should be improved significantly. It is crucial to calibrate instruments for ozone measurement under the low-pressure condition similar to the upper troposphere/lower stratosphere. For this purpose, we have developed an instrument for calibration of ozone monitor under low-pressure condition. At first, we used a commercial standard ozone generator as the ozone source and made a Teflon chamber with backward pressure controller to reduce the pressure of ozone from the ozone generator. However, the adjustment of the pressure of the chamber was difficult and critical although the pressure reduction was successful. Thus we have improved this system : 1) pressure-stabilize the inlet and exhaust ports of the ozone generator, 2) flow monitor from ozone generator, 3) some capillaries (instead of needle valve) are used to make pressure drop between ozone generator and the Teflon chamber, and so on. After these improvements, the developed calibration system worked stably. By comparing a precise ozone monitor, this ozone calibration system can calibrate a ozone measurement instrument with an accuracy of 3%. However, for using this system easily in the observation field, the operation should be automated.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] M.Fujiwara 他: "Seasonal variation of tropospheric ozone in Indonesia revealed by 5-year ground-based observations"Journal of Geophysical Research. 105. 1879-1888 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Kita 他: "Increase of ozone and ozone precursor gases in the upper troposphere over the Indonesian Northern Australian region observed during BIBLE-A aircraft observation campaign"Atmospheric Ozone Proceedings of the Quadrennial Ozone Symposium Sapporo 2000. 479-480 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M.Fujiwara et al.: "Seasonal variation of tropospheric ozone in Indonesia revealed by 5-year ground-based observations"Journal of Geophysical Research. 105. 1879-1888 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Kita et al.: "Increase of ozone and ozone precursor gases in the upper troposphere over the Indonesian Northern Australian region observed during BIBLE-A aircraft observation campaign"Atmospheric Ozone-Proceedings of teh Quadrennial Ozone Symposium Sapporo 2000. 479-480 (2000)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2002-03-26  

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