For the capital, there are more blue sky (the struggler is youth)

In the main building of the Beijing Ecological Environment Monitoring Center, a special calendar is hung, which condenses the concentration of PM2.5 (fine particles) every day since 2013.

"The darker the color, the more red, the worse the air quality; the lighter the color, the better the air quality, the better the air quality." Liu Baoxian, director of the Beijing Ecological Environment Monitoring Center, said that through this calendar map The better, the blue sky and white clouds are more, and the "temperament" continues to improve.

Following the first comprehensive standards last year, the air quality in Beijing has been further improved since this year. In the first half of the year, the average PM2.5 concentration of Beijing PM2.5 fell to 31 micrograms/cubic meter, a year -on -year decrease of 24.4%. Liu Baoxian and colleagues gave full play to the role of "sentinel", providing scientific and technological support and decision -making reference for Beijing's air pollution control and ecological environmental protection.

With a tough practice, it is too hard to practice

To be an excellent ecological environment monitoring worker, you must have a strong monitoring technology. In 2008, Liu Baoxian, 25, graduated from Beijing University of Chemical Engineering and came to the Beijing Ecological Environment Monitoring Center. In order to master the corresponding skills as soon as possible, he worked hard.

During the day, after completing the business work, Liu Baoxian tirelessly exercised the operating method of "stable". It was often one day in laboratory to practice one day. In the evening, he read and learned various environmental monitoring books to supplement theoretical knowledge. With this toughness, Liu Baoxian won the championship one year later in Beijing's environmental monitoring professional and technical personnel.

In 2013, my country implemented a new "Environmental Air Quality Standard" and included PM2.5 into the scope of monitoring. At that time, the domestic PM2.5 source analysis related fields were still blank.

Liu Baoxian took the initiative to lead the team to take on this difficult task. "What is the composition of PM2.5 and what instruments are used to collect. Foreign experience is difficult to copy, everything must be from scratch." Liu Baoxian said.

In the early days of the study, Liu Baoxian and the team learned from the research plan of PM10 (inhaled particle) source analysis technology system. However, the pollution characteristics of PM2.5 and PM10 were very different. One after another, research was in trouble.

"We underestimate the difficulty of PM2.5 source analysis." Liu Baoxian took responsibility and led the team to continue research. From the beginning of 2012 to the end of 2013, in the past two years, they collected pollutants in urban, suburbs, industrial areas, roads and other places, placed and collected tens of thousands of filter membranes, analyzed pollutant components, carried out chemical analysis and chemical analysis and After the model calculation, after doing a lot of work, it broke through multiple technical problems, and finally developed the monitoring method of more than 200 compounds in PM2.5.

In 2014, Beijing first released the results of PM2.5 source analysis research, which became the first city in the country to release PM2.5 source analysis report.

Lead the team to build a high -density air quality monitoring network

The governance of air pollution has gradually shifted to refinement, and higher requirements for monitoring networks.

Prior to 2012, the air quality automatic monitoring system in Beijing was established with traditional technology. Only more than 30 points were used to evaluate the quality of urban air quality, and it was difficult to support the needs of refined management. In particular, it was difficult to cover the management of the streets, towns and villages, and other management. ", Law enforcement teams can only turn around the street to check pollution.

"Adopt traditional technology, spread the Internet to more than 300 streets and towns in the city. It covers a large area and needs to invest huge funds. It is impractical." Liu Baoxian believed.

Liu Baoxian and colleagues thought that using small, intelligent, and relatively low -cost sensor monitoring terminals, as an important supplement and extension of the original automatic monitoring system, "from manual to intelligence, through cognitive computing and Internet of Things technology to achieve high -density monitoring ","

The biggest challenge is the quality of data. "R & D to do scene testing, the worse the weather conditions, the better." Liu Baoxian said.

In the early morning of the day, the rainfall was severe, and the weather was bad, but in Liu Baozheng's eyes, this was a good time to study the quality control model under high humidity weather. He quickly called the team members to debug the equipment in the heavy rain, sort out and summarize the data, and finally solved the quality control problems of the equipment in the special environment.

In this way, during the day after day, the first independent high -density air quality monitoring network was put into use in Beijing. Since 2015, Liu Baoxian led the team to set up more than 1,000 small sensors, covering more than 300 streets and towns in the city, as if installing a high -precision "CT machine" for the diagnosis of Beijing's atmospheric conditions.

Under the massive data provided by the high -density monitoring network, Liu Baoxian led the team to combine information such as meteorological, geography, pollution sources and other information to establish a traceability system that traces the cause of pollution to the cause of pollution.

"Through this system, it can accurately identify the high -value zone emitted in Beijing, expose them, and provide a direct basis for precise law enforcement and targeted pollution control." Liu Baoxian said that now, law enforcement team members "check one quasi" , Greatly improved law enforcement efficiency.

"The confidence gains more and more blue sky" "

"Monitoring data is the basis for environmental decisions. No matter what the situation is facing, the monitoring data cannot be interrupted or wrong." Liu Baoxian said.

During the work, Liu Baoxian always strictly asked himself to influence the people around him with every move. For difficulty projects such as phosphate fog and volatile organic matter monitoring, he is not afraid of the cold and summer, climb stairs and smoke tubs again and again; he is not afraid of boring, repeat the experimental steps over and over again. Since his work, Liu Baoxian has maintained a record of "zero errors" of millions of environmental monitoring data for more than 10 years. Today, Liu Baoxian has a new topic task. Since 2013, Beijing has carried out three rounds of PM2.5 pollution source analysis, laying the foundation for pollution prevention and control. "On the basis of the phased results of air pollution control, a new round of pollution source analysis will focus on PM2.5 and ozone pollution collaborative governance to further consolidate the results of air quality and improve." , Also pay more attention to their preface -volatile organic matter.

"At present, the effectiveness of air pollution control in Beijing is still unstable. To achieve long -term stability and compliance, we still need to persist in and long for a long time." Liu Baoxian said, "In the future, we will deepen the" one micrograms "action, focusing on promoting pollution reduction and falling and falling. Carbon collaboration, PM2.5 and ozone coordinated control, Beijing and surrounding regions collaborative control. With everyone's joint efforts, we have confidence to gain more and more blue sky. "

For the beautiful Chinese dreams of blue, green mountains, and more clear water, Liu Baoxian and his colleagues just worked hard. (Source: People's Daily)

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