Ground-based intercomparison of path-integrated DOAS measurements and conventional point measurements of ambient trace-gas concentrations

Eric S. Ringler; Viney P. Aneja

doi:10.1117/12.140189

12 February 1993 Ground-based intercomparison of path-integrated DOAS measurements and conventional point measurements of ambient trace-gas concentrations

Eric S. Ringler, Viney P. Aneja

Author Affiliations +

Proceedings Volume 1715, Optical Methods in Atmospheric Chemistry; (1993) https://doi.org/10.1117/12.140189
Event: Environmental Sensing '92, 1992, Berlin, Germany

Abstract

During the summer of 1991, simultaneous measurements of O₃, NO, NO₂, and SO₂ were obtained by an open path differential optical absorption spectrometer (DOAS) and conventional point methods at two sites (one urban and one rural) in the central Piedmont of North Carolina. The monitoring was conducted as part of the Southern Oxidant Study (SOS) program. In addition, the DOAS was configured to measure HNO₂, NH₃ HCHO, benzene, toluene, and p-xylene. The DOAS measurements were each integrated over a one minute period and the full set of measurements was obtained over a seven minute cycle time. NO and NH₃ were measured over a 200 meter folded path. The remaining gases were measured over a 400 meter folded path. Additional point measurements included continuous measurements of NO_y, H₂O₂, and integrated measurements of speciated hydrocarbons, aldehydes, and HNO₃. This paper examines the relationship between the path integrated, and point measurements of O₃, NO, NO₂, and SO₂.

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Eric S. Ringler and Viney P. Aneja "Ground-based intercomparison of path-integrated DOAS measurements and conventional point measurements of ambient trace-gas concentrations", Proc. SPIE 1715, Optical Methods in Atmospheric Chemistry, (12 February 1993); https://doi.org/10.1117/12.140189

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