| 引用本文: | WANG Aiping,CHEN Cheng,LU Weiqing,MAO Jingjing,YANG Xue.NO2 Pollution Characteristics in Autumn and Winter of Jiangsu Province in 2020—2021[J].Environmental Monitoring and Forewarning,2024,16(6):87~92 |
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| 摘要: |
| 基于二氧化氮（NO2）地面监测数据，结合对流层观测仪（TROPOMI）卫星观测结果，分析了新型冠状病毒流行期间（2020—2021年）江苏省NO2污染特征，并使用气象-空气质量-源解析（WRF-CAMQ-ISAM）数值模式对NO2进行溯源分析。结果表明：2020和2021年江苏省NO2年均质量浓度均为29 μg/m3，同比2019年下降了21.6%，但秋、冬季（11—12月）仍然是NO2管控的艰难期。TROPOMI卫星和地面观测结果均表明，NO2质量浓度高值区集中在沿江8市。2021年秋、冬季NO2首要污染物天数超过2019年同期，秋、冬季NO2首要污染物情况仍会出现反弹。气象-空气质量（WRF-CAMQ）数值模式给出的管控效果评估表明，2021年秋、冬季气象和人为因素是共同促进江苏省NO2浓度升高的原因，与2020年相比，其气象和人为因素将2021年NO2质量浓度分别抬升了3.1，0.9 μg/m3。沿江8市对NO2浓度人为贡献多为正值，NO2质量浓度变化值介于-0.6～6.7 μg/m3；苏北5市人为贡献多为负值，NO2质量浓度变化值介于-4.6～1.7 μg/m3。行业贡献结果表明，秋、冬季NO2来源主要是道路移动源、工业源、非道路移动源，贡献占比分别为39.2%，33.0%，20.8%，船舶和居民源贡献均为3.5%。 |
| 关键词: 二氧化氮 秋冬季 污染特征 源解析 江苏 |
| DOI：DOI：10.3969/j.issn.1674-6732.2024.06.014 |
| 分类号:X512 |
| 基金项目:江苏省环境监测科研基金项目（2109） |
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| NO2 Pollution Characteristics in Autumn and Winter of Jiangsu Province in 2020—2021 |
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WANG Aiping1， CHEN Cheng2， LU Weiqing1， MAO Jingjing1， YANG Xue2
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1. Jiangsu Provincial Environmental Monitoring Center，Nanjing，Jiangsu 210019，China；2.Jiangsu Suli Environmental Technology Co.， Ltd.， Nanjing，Jiangsu 210019， China
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| Abstract: |
| Based on NO2 ground monitoring data and combined with the observation results of TROPOMI satellite， the characteristics of NO2 pollution in Jiangsu Province during the covid-19 pandemic from 2020 to 2021 were analyzed. Using WRF-CMAQ-ISAM system model，the characteristics of NO2 were analyzed. The results showed that： The NO2 concentration in Jiangsu province was 29 μg/m3 in 2020 and 2021， showing a significant decrease of 21.6% compared with that in 2014—2019. However， autumn and winter（November-December） are still a difficult period for NO2 control. TROPOMI satellite and ground observations showed that high NO2 values in autumn and winter were concentrated in 8 cities along the Yangtze River. From November to December 2021， the number of days of NO2 primary pollutants exceeded the same period in 2019， which showed that pollution by NO2 as the primary pollutant in autumn and winter still rebounding. The WRF-CMAQ model indicated that both meteorological and anthropogenic factors in autumn and winter of 2021 jointly contributed to the increase in NO2 concentration across Jiangsu Province. Compared with that in 2020， meteorological and human-related factors have increased the concentration of NO2 by 3.1 and 0.9 μg/m3， respectively. In the 8 cities located along the Yangtze River， the anthropogenic influence on the NO2 concentration is predominantly positive， ranging from -0.6 to 6.7 μg/m3. Conversely， in the 5 cities in northern Jiangsu， the anthropogenic impact is predominantly negative， with contribution values ranging from -4.6 to 1.7 μg/m3. The contribution results of different industries showed that the NO2 sources were mainly road mobile sources， industrial sources and non-road mobile sources， accounting for 39.2%， 33.0% and 20.8% respectively， and ships and residential sources accounted for 3.5%. |
| Key words: Nitrogen dioxide Autumn and winter Pollution characteristics Source analysis Jiangsu Province |
