Atmospheric Concentrations and Distributions of CF&lt;sub&gt;2&lt;/sub&gt;Cl&lt;sub&gt;2&lt;/sub&gt;, CFCl&lt;sub&gt;3&lt;/sub&gt; and N&lt;sub&gt;2&lt;/sub&gt;O over Japan between 1979 and 1986

Hirota, Michio; Muramatsu, Hisafumi; Sasaki, Toru; Makino, Yukio; Asahi, M.

doi:10.2151/jmsj1965.66.5_703

Cited by 2 publications

(2 citation statements)

References 16 publications

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“…The difference between the two profiles on November 8, 1988 andJanuary 6, 1989 is very small. This result is consistent with the behavior of N2O concentration shown in the literature (Cicerone et al, 1978;Coffey et al, 1981;Hirota et al, 1988). A comparison was made with the balloon experiment at Sanriku (39*09'N, 141*49'E), about 130 km northeast from Sendai, on September 3, 1985(Nakazawa, private communication, 1988.…”

Section: Resultssupporting

confidence: 88%

“…The mixing ratio of nitrous oxide was assumed to be 310 ppbv at the ground. This value was adopted from the observed concentration and increasing rate of tropospheric nitrous oxide over Japan reported by Hirota et al (1988). The volume mixing ratios in the altitude range from 15 to 30 km for ozone and 10 to 35 km for nitrous oxide are definitely determined by the inversion method.…”

Section: Inversion Methodsmentioning

confidence: 99%

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Remote Sounding of Vertical Profiles of Atmospheric Ozone and Nitrous Oxide with a Tunable Diode Laser Heterodyne Spectrometer

Taguchi

Okano

Fukunishi

1990

Journal of the Meteorological Society of Japan

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Observations of atmospheric ozone and nitrous oxide were performed with a laser heterodyne spectrometer using a tunable diode laser as a local oscillator at Sendai (38*15'N, 140*51'E), Japan from November 1988 to June 1989. The absorption line spectra measured with ultra high resolution of 0.0013 or 0.0027 cm-1 (40 or 80 MHz) were inverted by a conventional inversion method to retrieve vertical distribution profiles. The observed altitude range is from 5 to 30 km for ozone and from 1 to 35 km for nitrous oxide and the vertical resolution is*5 km. Total column densities were also obtained by integrating the vertical profiles.Errors in the retrieved mixing ratio profiles were estimated by computer simulations for all the plausible causes: <10 % arising from uncertainties in line parameters, *3 % from random noise in the spectra when SNR=500, and <3 % from difference between model and actual temperature profiles. For total column densities, the random error is <3 %, while systematic error due to uncertainty in the line strength is <10 %.The retrieved vertical profiles of ozone from January to June 1989 show seasonal and day-to-day variations usually seen in middle latitudes. The total column densities were compared with those measured by Dobson spectrophotometers at Tateno and Sapporo. The result is consistent with the latitudinal dependence of total column density of ozone. The vertical profiles of nitrous oxide were also obtained by the same procedure as for ozone. The result for nitrous oxide agrees with the data obtained by a balloon observation at Sanriku (39*09'N, 141*49'E).

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Section: Resultssupporting

confidence: 88%

Section: Inversion Methodsmentioning

confidence: 99%