Characteristics of ozone vertical profile observed in the boundary layer aroundBeijing in autumn
Zhiqiang Ma , Xiaoling Zhang , Jing Xu , Xiujuan Zhao , Wei Meng
DOI:
Received September 06, 2010,Revised March 08, 2011, Accepted , Available online
Volume 23,2011,Pages 1316-1324
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In the autumn of 2008, the vertical profiles of ozone and meteorological parameters in the low troposphere (0–1000 m) were observed
at two sites around Beijing, specifically urban Nanjiao and rural Shangdianzi. At night and early morning, the lower troposphere divided
into two stratified layers due to temperature inversion. Ozone in the lower layer showed a large gradient due to the titration of NO. Air
flow from the southwest brought ozone-rich air to Beijing, and the ozone profiles were marked by a continuous increase in the residual
layer at night. The accumulated ozone in the upper layer played an important role in the next day’s surface peak ozone concentration,
and caused a rapid increase in surface ozone in the morning. Wind direction shear and wind speed shear exhibited different influences
on ozone profiles and resulted in different surface ozone concentrations in Beijing.
