Simultaneous Measurements of Atmospheric Pollutants and Visibility with a Long-Path DOAS System in Urban Areas |
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| Authors: | Jeong Soon Lee Young J Kim Bongjae Kuk Andreas Geyer Ulrich Platt |
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| Institution: | (1) Air Quality Laboratory, Advanced Environmental Monitoring Research Center, Kwangju Institute of Science and Technology (K-JIST), 1 Oryongdong Buk-gu, Gwangju, Korea;(2) Satellite Technology Research Center, Korea Advanced Institute of Science and Technology (KAIST), Gusungdong, Yusunggu, Daejeon, Korea;(3) Space Center, Korea Aerospace Research Institute, Daejeon, Korea;(4) Department of Atmospheric Sciences, University of California at Los Angeles, 7129 Math Sciences Bldg., Los Angeles, California, U.S.A.;(5) Institut für Umweltphysik, Ruprecht-Karls University Heidelberg, Im Neuenheimer Feld 229, Heidelberg, Germany |
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| Abstract: | In this paper, the applicability of a Long-Path Differential Optical Absorption Spectroscopy (LP-DOAS) system was checked for the feasibility of the simultaneous measurement of trace gases (such as O3, NO2, SO2, and HCHO) and atmospheric visibility (light extinction by aerosols) in Asian urban areas. Field studies show that an LP-DOAS system can simultaneously measure the key pollutants (such as O3, NO2, SO2, and HCHO) at detection limits in the ppb/sub-ppb range as well as the Mie extinction coefficient with an uncertainty of  0.1 km–1 at time resolution of a few minutes. It is thus concluded that the use of LP-DOAS system is feasible for simultaneous measurement of gaseous pollutants as well as an atmospheric extinction coefficient which is tightly bound to fine particulate concentration. |
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| Keywords: | DOAS extinction coefficient optical monitoring spectroscopy visibility |
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