DEVELOPMENT OF THE METHOD TO MEASURE TOTAL REACTIVE NITROGEN IN THE MIDDLE ATMOSPHERE
Project/Area Number |
63540319
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Research Category |
Grant-in-Aid for General Scientific Research (C)
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Allocation Type | Single-year Grants |
Research Field |
Space and upper atmospheric physics
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Research Institution | NAGOYA UNIVERSITY |
Principal Investigator |
KONDO Yutaka NAGOYA UNIVERSITY, RESEARCH INSTITUTE OF ATMOSPHERICS, ASSISTANT PROFESSOR, 空電研究所, 助教授 (20110752)
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Co-Investigator(Kenkyū-buntansha) |
IWATA Akira NAGOYA UNIVERSITY, RESEARCH INSTITUTE OF ATMOSPHERICS, RESEARCH ASSOCIATE, 空電研究所, 助手 (40023676)
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Project Period (FY) |
1988 – 1989
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Project Status |
Completed (Fiscal Year 1989)
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Budget Amount *help |
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1989: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1988: ¥1,100,000 (Direct Cost: ¥1,100,000)
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Keywords | Total reactive nitrogen / Middle atmosphere / Gold converter / Carbon monoxide / NOy / オゾン / 成層圏 |
Research Abstract |
A gold converter system to reduce total reactive nitrogen (NO_y) into NO has been developed. Purified carbon monoxide (CO), passed through charcoal and Teflon filters, is mixed with the sample air to maintain a high conversion efficiency. our balloon- borne converter consists of nineteen gold tubes with an inner diameter of 6 mm. Each tube is 0.2 mm thick and 30 cm long. They are tied together and mounted in a 50 cm long stainless steel tube with an inner diameter of 30 mm. The temperature of the converter is controlled to be 300 <plus-minus>1゚C. The efficiency of conversion of NO_2 into NO at stratospheric pressures was measured in the laboratory. NO_2 in purified air with concentrations between 10 and 100 ppbv was prepared by oxidizing NO with ozone produced by a mercury UV lamp. The average value of all the data has been found to be 0.99 with a two sigma standard deviation of 0.02. It is unaffected by ozone.
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Report
(3 results)
Research Products
(21 results)
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[Publications] Kondo, Y., A. Iwata, M. Pirre, R. Ramaroson, C. Delannoy, W.A. Matthews, M. Koike, and K. Suzuki: "Diurnal variation of nitric oxide at 26 km" Geophys. Res. Lett., 16, 867-870, 1989.
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Related Report
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[Publications] Hofmann, D.J., T.L. Deshler, P. Aimedieu, W.A. Matthews, P.V. Jhonston, Y. Kondo, W.R. Sheldon, G.J. Byrne, and J.R. Benbrook: Nature, 340, 117-121, 1989.
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「研究成果報告書概要(欧文)」より
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[Publications] Kondo, Y., Y. Iwasaka, T. Oguti, N. Toriyama, A. Iwata, P. Aimedieu, W.A. Matthews, P.V. Johnston, W.R. Sheldon, J.R. Benbrook, D.J. Hofmann, and B. Hultqvist: Bull. Inst. Space Astro. Sci., 1989.
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「研究成果報告書概要(欧文)」より
Related Report
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[Publications] Kondo, Y., P. Aimedieu, W.A. Matthews, D.W. Fahey, D.G. Murcray, D.J. Hofmann, P.V. Johnston, Y. Iwasaka, A. Iwata, and W.R. Sheldon: "Balloon-borne measurements of total reactive nitrogen, nitric acid, and aerosol in the cold Arctic stratosphere" Geophys. Res. Lett., 1990.
Description
「研究成果報告書概要(欧文)」より
Related Report
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