MAX-DOAS observations of pollutant distribution and transboundary transport in typical regions of China.

Studying the spatiotemporal distribution and transboundary transport of aerosols, NO, SO, and HCHO in typical regions is crucial for understanding regional pollution causes. In a 2-year study using multi-axis differential optical absorption spectroscopy in Qingdao, Shanghai, Xi'an, and Kunming, we investigated pollutant distribution and transport across Eastern China-Ocean, Tibetan Plateau-Central and Eastern China, and China-Southeast Asia interfaces. First, pollutant distribution was analyzed.

Evaluation and measurement of tropospheric glyoxal retrieved from MAX-DOAS in Shenzhen, China.

Glyoxal is one of the representative oxygenated volatile organic compounds in the atmosphere. Its accurate measurement has high significance for the determination of VOC emission sources and the calculation of the global budget of secondary organic aerosol. We investigated the spatio-temporal variation characteristics of glyoxal through observations over a 23-day period.