With the rapid development of industrialization and urbanization, atmospheric pollution has become increasingly serious. According to the prediction of the Ministry of Ecology and Environment, due to the continuous high temperature and the influence of the near-surface southerly wind transport, on June 4-15, the air conditions in the Yangtze River Delta, South China, Northwest and Northeast China regions are not ideal, and mild to moderate ozone pollution may occur.
Ozone is an allotrope of oxygen. At room temperature, it is a light blue gas with a special odor. When it is at an altitude of 10 to 50 kilometers above the ground, ozone can absorb ultraviolet rays and protect the living creatures on Earth. However, once ozone reaches the ground level of about 10 to 100 meters from the ground, it will become a "healthy killer."
Studies have shown that up to 48% of the ozone pollution in the near-ground layer comes from the photochemical reaction of pollutants such as nitrogen oxides (NOx). Therefore, to control ozone pollution, it is necessary to reduce NOx emissions.
With the deployment of social sustainable development strategies, in recent years, China will accelerate the construction of photochemical monitoring networks and carry out monitoring of volatile organic compounds (VOCs) and NOx in key regions and cities. The state vigorously controls ozone pollution and cuts emissions of nitrogen oxides and volatile organic compounds in certain proportions. Combining local pollution conditions, industrial characteristics, and economic and social development levels, we have adopted strategies to control the atmospheric conditions of different regions.
As a fast online monitoring system for atmospheric fine particles and ozone in space-time distribution with independent intellectual property rights in China, the atmospheric ozone detection laser radar has improved the independent innovation capability and core competitiveness of the laser radar industry in China, and has provided the capability for real-time monitoring of the atmospheric environment in China. Data analysis provides reliable technical means.
Atmospheric ozone detection laser radar uses the difference in the absorption of laser wavelengths by ozone to determine the concentration of ozone on the common path of the pulsed laser, thus realizing the detection of the spatial and temporal distribution of ozone. The system also integrates a variety of mature and stable laser radar core technologies, which not only can effectively monitor the contaminated areas, determine its source and delivery, but also can effectively prevent the occurrence of major pollution incidents. It also provides technical and equipment support for the transboundary transportation of pollutants.
Nowadays, laser radar technology has been extensively equipped in the field of environmental monitoring, providing important technical means and high-end equipment for the study of ashes and photochemical pollution. Since 2013, after the establishment of a stereoscopic monitoring network for atmospheric fine particles and ozone lidar in the Jing-Jin-Ji region, the laser radar technology has maintained a good working status and provided strong technical support for China's atmospheric monitoring.
Lidar technology is not only used in the environmental protection business sector to study the characteristics of atmospheric fine particles and ash formation mechanisms, and to carry out detection of urban photochemical reaction processes; it is also used in meteorological detection departments to study the meteorological and climate change effects of aerosols.
From summer afternoon to evening, the sky is clear and the sky is full of clouds. At this time, the ozone concentration is the highest, and people should reduce their outbound and outdoor activities. When you go out, sensitive people need protection. Appropriate increase in physical activity, physical fitness, and enhanced immunity can also reduce ozone damage to the upper respiratory tract.
The governance of the air environment is a long process. Chinese enterprises should also start from their own, product design is more environmentally friendly, and motor vehicle emissions are cleaner. Everyone has done a meager effort to build our green water and blue sky together.
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