Journal ArticleDOI
OH ‐ Radicals in the lower troposphere
TLDR
The detection limit depended on the quality of the photographic exposure and reached 2 · 106 cm−3 in the most favourable cases as mentioned in this paper, while the average detection limit remained below 4 · 106cm−3.Abstract:
OH has been detected in the lower troposphere by optical absorption of the Q1 2 (A²Σ+, v = O, X²Π, v = O) line at 307.995 nm along a 7.8 km path above Julich (51° North, 6° East). The detection limit depended on the quality of the photographic exposure and reached 2 · 106 cm−3 in the most favourable cases.
OH generally remained below 4 · 106 cm−3, the average detection limit. But on several occasions during the observation period from mid August to November 1975 concentrations up to 7 · 106 cm−3 were observed.read more
Citations
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Journal ArticleDOI
Tropospheric chemistry: A global perspective
TL;DR: A model for the photochemistry of the global troposphere constrained by observed concentrations of H2O, O3, CO, CH4, NO, NO2, and HNO3 is presented in this paper.
Journal ArticleDOI
Simultaneous measurement of atmospheric CH2O, O3, and NO2 by differential optical absorption
TL;DR: In this paper, the authors used a ground-based UV-optical absorption technique which allowed the simultaneous determination of CH2O, NO2, and O3 with detection limits of 0.1, 1, and 1 ppb, respectively, for rural areas around Julich and for maritime air at the north coast of Germany.
Journal ArticleDOI
Multi axis differential optical absorption spectroscopy (MAX-DOAS)
TL;DR: In this paper, a Monte Carlo RTM is applied to calculate Airmass Factors (AMF) for the various viewing geometries of MAX-DOAS, which can be used to quantify the light path length within the absorber layers.
Journal ArticleDOI
Iodine: Its possible role in tropospheric photochemistry
TL;DR: A detailed study of the photochemistry of iodine and its oxides indicates that iodine species may play an important role in the tropospheric photochemical system as mentioned in this paper, which can lead to the catalytic removal of troposphere O3, the enhancement of the NO2/NO ratio, the destruction of HxOy free radicals, and the conversion of HO2 to OH.
Journal ArticleDOI
Measurement of OH and HO2 in the Troposphere
References
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