Related Experiment Video
Updated: Aug 17, 2026
Façade-Level Monitoring of CO2 Variability under Urban Heat Island Conditions using Low-Cost Sensor Data Loggers
Published on: December 12, 2025
Simultaneous measurements of atmospheric pollutants and visibility with a Long-Path DOAS system in urban areas
Jeong Soon Lee1, Young J Kim, Bongjae Kuk
1Air Quality Laboratory, Advanced Environmental Monitoring Research Center, Kwangju Institute of Science and Technology (K-JIST), 1 Oryongdong Buk-gu, Gwangju, Korea.
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 03, 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 approximately 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.
