Application Research On Haze Pollution In Changzhou Area Based On Equipment Of Laser Radar And Wind Profile Radar

Changzhou is located in the heart of the Yangtze River Delta,haze pollution.In this paper,Jiangsu Province(Jintan)meteorological comprehensive observation station is selected.The site integrates routine ground observation(observation of physical and chemical properties)and various ground-based remote sensing devices to carry out omni-directional observation of haze and so on.It is the leading observatory of the same kind in China.In this paper,the data results from observation equipment such as N02,03,S02,PM10 and PM2.5,laser radar,wind profiler radar and other observational equipment are used.Combined with various observation methods and research methods,Conduct in-depth research.The article studies the components of smog composite pollution,pollutant transport flux and pollutant transport channel in the area,and obtains the following results:1.A preliminary analysis of the haze pollution in the region in 2016 showed that the annual air quality index AQI represented winter,spring,summer and autumn,with Grade II and above accounting for 65%of the annual total.The annual air quality of the region was excellent Mainly.2.The seasonal,monthly and diurnal changes of gaseous pollutants N02 and S02 are consistent:the performance of winter and spring>summer and autumn.The trend of 03 is exactly the opposite.The concentrations of gaseous pollutants in the area are generally low,while the diurnal variations of PM 10 and PM2.5 have obvious bimodal variations.The seasonal and monthly variations are consistent with each other,and there is a clear positive correlation between them.Spring>winter>summer>autumn.Analysis of haze pollution in the area shows that it is not caused by gaseous pollutants and is almost always affected by PM10and PM2.5.3.Annual smog pollution days accounted for 35%,mainly due to particulate matter pollution.The article uses the equipment data such as laser radar and wind profiler radar to analyze the pollution transportation process.As a result,it was found that when the pollution process started in early March,the increase of the particulate matter concentration was caused by the external dust transport.Northwest airflow carrying dust particles at about 3 km altitude transmission to reach the site.The descending airflow over the sky caused dust particles to settle to near ground,resulting in a significant uplift of the mass concentration of particulate matter.This indicates that there is a significant positive transport flux at a high altitude external input with a flux strength of up to 600 g/m3/S.Although near the ground also has outward output,but the outward output is weak,the intensity is far less than the external input.Integral flux intensity appears positive as significantly greater than negative and the input is greater than the output.In this study,the state of haze pollution,seasonal distribution and pollution level of Jintan,Changzhou,in 2016 were studied by means of statistical analysis.Through the analysis of gaseous matter and particulate matter,it was found that smog pollution was an important factor.Secondly,The reasons for the change,identify the local sources and foreign sources of transport;at the same time study the haze pollutant delivery flux,determine the source and transport intensity of the region(inter)pollutants,to provide a theoretical basis for the development of regional air pollution control programs,but also It provides a feasible monitoring scheme and research ideas for the research of air pollution transmission channel in the Yangtze River Delta.