MA Siqi, CHEN Weiwei, ZHANG Shichun, TONG Quansong, BAO Qiuyang, GAO Zongting. Characteristics and Cause Analysis of Heavy Haze in Changchun City in Northeast China[J]. Chinese Geographical Science, 2017, 27(6): 989-1002. doi: 10.1007/s11769-017-0922-6
Citation: MA Siqi, CHEN Weiwei, ZHANG Shichun, TONG Quansong, BAO Qiuyang, GAO Zongting. Characteristics and Cause Analysis of Heavy Haze in Changchun City in Northeast China[J]. Chinese Geographical Science, 2017, 27(6): 989-1002. doi: 10.1007/s11769-017-0922-6

Characteristics and Cause Analysis of Heavy Haze in Changchun City in Northeast China

doi: 10.1007/s11769-017-0922-6
Funds:  Under the auspices of National Key Research and Development Project (No. 2017YFC0212300), Youth Innovation Promotion Association CAS (No. 2017275), Frontier Science Research Plan CAS (No. QYZDB-SSW-DQC045)
  • Received Date: 2017-01-09
  • Rev Recd Date: 2017-03-30
  • Publish Date: 2017-12-27
  • Northeast China has been reported as having serious air pollution in China with increasing occurrences of severe haze episodes. Changchun City, as the center of Northeast China, has longstanding industry and is an important agricultural base. Additionally, Changchun City has a long winter requiring heating of buildings emitting pollution into the air. These factors contribute to the complexity of haze pollution in this area. In order to analyze the causes of heavy haze, surface air quality has been monitored from 2013 to 2015. By using satellite and meteorological data, atmospheric pollution status, spatio-temporal variations and formation have been analyzed. Results indicated that the air quality in 88.9% of days exceeding air quality index (AQI) level-1 standard (AQI >50) according to the National Ambient Air Quality Standard (NAAQS) of China. Conversely, 33.7% of the days showed a higher level with AQI > 100. Extreme haze events (AQI > 300) occurred frequently during agricultural harvesting period (from October 10 to November 10), intensive winter heating period (from Late-December to February) and period of spring windblown dust (April and May). Most daily concentrations of gaseous pollutants, i.e., NO2 (43.8 μg/m3), CO (0.9 mg/m3), SO2 (37.9 μg/m3), and O3 (74.9 μg/m3) were evaluated within level-1 concentration limits of NAAQS standards. However, particulate matter (PM2.5 and PM10) concentrations (67.3 μg/m3 and 115.2 μg/m3, respectively) were significantly higher than their level-1 limits. Severe haze in spring was caused by offsite transported dust and windblown surface soil. Heavy haze periods during fall and winter were mainly formed by intensive emissions of atmospheric pollutants and steady weather conditions (i.e., low wind speed and inversion layer). The overlay emissions of widespread straw burning and coal combustion for heating were the dominant factors contributing to haze in autumn, while intensive coal burning during the coldest time was the primary component of total emissions. In addition, general emissions including automobile exhaust, road and construction dust, residential and industrial activities, have significantly increased in recent years, making heavy haze a more frequent occurrence. Therefore, both improved technological strategies and optimized pollution management on a regional scale are necessary to minimize emissions in specified seasons in Changchun City, as well as comprehensive control measures in Northeast China.
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Characteristics and Cause Analysis of Heavy Haze in Changchun City in Northeast China

doi: 10.1007/s11769-017-0922-6
Funds:  Under the auspices of National Key Research and Development Project (No. 2017YFC0212300), Youth Innovation Promotion Association CAS (No. 2017275), Frontier Science Research Plan CAS (No. QYZDB-SSW-DQC045)

Abstract: Northeast China has been reported as having serious air pollution in China with increasing occurrences of severe haze episodes. Changchun City, as the center of Northeast China, has longstanding industry and is an important agricultural base. Additionally, Changchun City has a long winter requiring heating of buildings emitting pollution into the air. These factors contribute to the complexity of haze pollution in this area. In order to analyze the causes of heavy haze, surface air quality has been monitored from 2013 to 2015. By using satellite and meteorological data, atmospheric pollution status, spatio-temporal variations and formation have been analyzed. Results indicated that the air quality in 88.9% of days exceeding air quality index (AQI) level-1 standard (AQI >50) according to the National Ambient Air Quality Standard (NAAQS) of China. Conversely, 33.7% of the days showed a higher level with AQI > 100. Extreme haze events (AQI > 300) occurred frequently during agricultural harvesting period (from October 10 to November 10), intensive winter heating period (from Late-December to February) and period of spring windblown dust (April and May). Most daily concentrations of gaseous pollutants, i.e., NO2 (43.8 μg/m3), CO (0.9 mg/m3), SO2 (37.9 μg/m3), and O3 (74.9 μg/m3) were evaluated within level-1 concentration limits of NAAQS standards. However, particulate matter (PM2.5 and PM10) concentrations (67.3 μg/m3 and 115.2 μg/m3, respectively) were significantly higher than their level-1 limits. Severe haze in spring was caused by offsite transported dust and windblown surface soil. Heavy haze periods during fall and winter were mainly formed by intensive emissions of atmospheric pollutants and steady weather conditions (i.e., low wind speed and inversion layer). The overlay emissions of widespread straw burning and coal combustion for heating were the dominant factors contributing to haze in autumn, while intensive coal burning during the coldest time was the primary component of total emissions. In addition, general emissions including automobile exhaust, road and construction dust, residential and industrial activities, have significantly increased in recent years, making heavy haze a more frequent occurrence. Therefore, both improved technological strategies and optimized pollution management on a regional scale are necessary to minimize emissions in specified seasons in Changchun City, as well as comprehensive control measures in Northeast China.

MA Siqi, CHEN Weiwei, ZHANG Shichun, TONG Quansong, BAO Qiuyang, GAO Zongting. Characteristics and Cause Analysis of Heavy Haze in Changchun City in Northeast China[J]. Chinese Geographical Science, 2017, 27(6): 989-1002. doi: 10.1007/s11769-017-0922-6
Citation: MA Siqi, CHEN Weiwei, ZHANG Shichun, TONG Quansong, BAO Qiuyang, GAO Zongting. Characteristics and Cause Analysis of Heavy Haze in Changchun City in Northeast China[J]. Chinese Geographical Science, 2017, 27(6): 989-1002. doi: 10.1007/s11769-017-0922-6
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