Yan XIANG, Tian-shu ZHANG, Guang-qiang FAN, et al. Differential absorption lidar combined with numerical model used for detecting distribution of ozone during summer in Hangzhou[J]. Optics and precision engineering, 2018, 26(8): 1882-1887.
DOI:
Yan XIANG, Tian-shu ZHANG, Guang-qiang FAN, et al. Differential absorption lidar combined with numerical model used for detecting distribution of ozone during summer in Hangzhou[J]. Optics and precision engineering, 2018, 26(8): 1882-1887. DOI: 10.3788/OPE.20182608.1882.
Differential absorption lidar combined with numerical model used for detecting distribution of ozone during summer in Hangzhou
An ozone differential absorption lidar (DIAL) was used to carry out observations of the spatial and temporal distribution of summer ozone concentrations in Hangzhou
China
and to study how they are influenced by meteorological elements. The WRF-Chem model was used to simulate the characteristics of the ozone distribution
and for the analysis of meteorological factors. The simulated values for ozone concentration were in good agreement with the observed values obtained using the DIAL. In the summer of 2016
ozone pollution occurred on four occasions in 18 days
with each occasion lasting between two to five days
and with the highest concentration of 550 nL/L detected. There was a highly concentrated ozone layer at an altitude of one to two km
with vertical and horizontal movement having a significant influence on the ozone pollution near the ground. The lowest mean value of ozone concentration near the ground was 75 nL/L
which occurred around 2:00 am
while the average highest value was 90 nL/L
which occurred at 12:00 am. The daily ozone concentration near ground level exhibited diurnal variation
a pattern not apparent in the upper air. The DIAL system was reliable for the detection of ozone. Conditions of strong solar radiation
high temperature
and low humidity were seen as being conducive to the formation of ozone
while strong winds and rain had a diffusing effect.
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