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Titolo:
Assessment of the uncertainties in the NO2 and O-3 measurements by visiblespectrometers
Autore:
Koike, M; Kondo, Y; Matthews, WA; Johnston, PV; Nakajima, H; Kawaguchi, A; Nakane, H; Murata, I; Budiyono, A; Kanada, M; Toriyama, N;
Indirizzi:
Nagoya Univ, Solar Terr Environm Lab, Aichi 442, Japan Nagoya Univ AichiJapan 442 v, Solar Terr Environm Lab, Aichi 442, Japan Natlaland Water & Atmospher Res, NIWA Lauder, Omakau, Central Otago, New Ze Natl Inst Water & Atmospher Res Omakau Central Otago New Zealand New Ze Natl Inst Environm Studies, Tsukuba, Ibaraki 305, Japan Natl Inst EnvironmStudies Tsukuba Ibaraki Japan 305 , Ibaraki 305, Japan Tohoku Univ, Dept Astrophys & Geophys, Sendai, Miyagi 98077, Japan Tohoku Univ Sendai Miyagi Japan 98077 eophys, Sendai, Miyagi 98077, Japan LAPAN, Atmospher Res Dev Ctr, Bandung, Indonesia LAPAN Bandung Indonesia APAN, Atmospher Res Dev Ctr, Bandung, Indonesia
Titolo Testata:
JOURNAL OF ATMOSPHERIC CHEMISTRY
fascicolo: 1, volume: 32, anno: 1999,
pagine: 121 - 145
SICI:
0167-7764(199901)32:1<121:AOTUIT>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
AIR-MASS FACTORS; PINATUBO VOLCANIC AEROSOLS; RADIATIVE-TRANSFER MODELS; GROUND-BASED MEASUREMENTS; ZENITH-SKY SPECTROMETERS; STRATOSPHERIC NO2; MID-LATITUDE; OZONE; ANTARCTICA; SPECTROSCOPY;
Keywords:
nitrogen dioxide; ozone; visible spectrometer; NDSC;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Physical, Chemical & Earth Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Koike, M Nagoya Univ, Solar Terr Environm Lab, 3-13 Honohara, Aichi 442, Japan Nagoya Univ 3-13 Honohara Aichi Japan 442 hara, Aichi 442, Japan
Citazione:
M. Koike et al., "Assessment of the uncertainties in the NO2 and O-3 measurements by visiblespectrometers", J ATMOS CH, 32(1), 1999, pp. 121-145

Abstract

The column amounts of nitrogen dioxide (NO2) and ozone (O-3) were measuredusing a visible spectrometer based on the twilight zenith-sky technique attwo observatories located at similar latitudes in the northern part of Japan separated by a distance of 150 km. The measurements began in April 1991 at the Moshiri Observatory (44.4 degrees N, 142.3 degrees E) and in April 1994 at the Rikubetsu Observatory (43.5 degrees N, 143.8 degrees E). Since weather conditions and the possible influence from tropospheric pollution were not always identical at these two observatories, the overall accuracy ofthe measurements was studied comparing these data sets. The first year data obtained at a solar zenith angle of 90 degrees indicated that the NO2 slant column values at sunrise and sunset agreed within 0.36 and 0.54 x 10(16)cm(-2), respectively, corresponding to 5 % (June) and to 12 % (December) of the columns. The O-3 values agreed within 0.76 x 10(19) cm(-2), corresponding to 4 % (March) similar to 6 % (August) of the columns, although a partof the difference was systematic. The O-3 column amounts were also compared to those obtained by the. Dobson spectrometer at Sapporo (43.5 degrees N,143.8 degrees E), whose latitude is similar to these observatories. When an air mass factor of 17.5 was used, the two-year Moshiri vertical column values agreed with the Dobson direct sun values to within 15 Dobson Units, or3 similar to 6 % Of the column. The difference between the two values was found to be due partly to the change in the air mass factor caused by seasonal and day-to-day changes in the shape of the O-3 vertical profiles. Theseresults confirm the reliability of the NO2 and O-3 measurements by visiblespectrometers at these sites for the Network for the Detection of Stratospheric Change (NDSC).

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Documento generato il 06/04/20 alle ore 01:44:38