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首页> 外文期刊>The Science of the Total Environment >Air quality changes during the COVID-19 lockdown over the Yangtze River Delta Region: An insight into the impact of human activity pattern changes on air pollution variation
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Air quality changes during the COVID-19 lockdown over the Yangtze River Delta Region: An insight into the impact of human activity pattern changes on air pollution variation

机译：在长江三角洲地区的Covid-19锁定期间空气质量变化：深入了解人类活动模式对空气污染变化的影响

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摘要

The outbreak of COVID-19 has spreaded rapidly across the world. To control the rapid dispersion of the virus, China has imposed national lockdown policies to practise social distancing. This has led to reduced human activities and hence primary air pollutant emissions, which caused improvement of air quality as a side-product. To investigate the air quality changes during the COVID-19 lockdown over the YRD Region, we apply the WRF-CAMx modelling system together with monitoring data to investigate the impact of human activity pattern changes on air quality. Results show that human activities were lowered significantly during the period: industrial operations, VKT, constructions in operation, etc. were significantly reduced, leading to lowered SO_2, NO_x, PM_(2.5) and VOCs emissions by approximately 16-26%, 29-47%, 27-46% and 37-57% during the Level Ⅰ and Level Ⅱ response periods respectively. These emission reduction has played a significant role in the improvement of air quality. Concentrations of PM_(2.5), NO_2 and SO_2 decreased by 31.8%, 45.1% and 20.4% during the Level Ⅰ period; and 33.2%, 27.2% and 7.6% during the Level Ⅱ period compared with 2019. However, ozone did not show any reduction and increased greatly. Our results also show that even during the lockdown, with primary emissions reduction of 15%-61%, the daily average PM_(2.5) concentrations range between 15 and 79 μg m~(-3), which shows that background and residual pollutions are still high. Source apportionment results indicate that the residual pollution of PM_(2.5) comes from industry (32.2-61.1%), mobile (3.9-8.1%), dust (2.6-7.7%), residential sources (2.1-28.5%) in YRD and 14.0-28.6% contribution from long-range transport coming from northern China. This indicates that in spite of the extreme reductions in primary emissions, it cannot fully tackle the current air pollution. Re-organisation of the energy and industrial strategy together with trans-regional joint-control for a full long-term air pollution plan need to be further taken into account.
机译：Covid-19的爆发已经迅速遍布全球。为了控制病毒的快速分散，中国施加了国家锁定政策，练习社会疏散。这导致人类活动减少，因此引发了原发性空气污染物排放，从而提高了空气质量作为副产品。为了调查在YRD区域的Covid-19锁定期间的空气质量变化，我们将WRF-CAMX建模系统与监测数据一起应用，调查人类活动模式对空气质量的影响变化。结果表明，在此期间，人类活动显着降低：工业运营，VKT，操作中的结构等显着降低，导致SO_2，NO_X，PM_（2.5）和VOCS排放量约为16-26％，29- Ⅰ级和Ⅱ级响应期间47％，27-46％和37-57％。这些减少减少在提高空气质量方面发挥了重要作用。 PM_（2.5），NO_2和SO_2浓度在Ⅰ级期间下降了31.8％，45.1％和20.4％;与2019年相比，Ⅱ期内，33.2％，27.2％和7.6％。然而，臭氧没有显示任何减少并大大增加。我们的结果还表明，即使在锁定期间，初级排放量也减少了15％-61％，每日平均PM_（2.5）浓度范围为15至79μgm〜（-3），这表明背景和残余污染仍然很高。源分摊结果表明，PM_（2.5）的剩余污染来自工业（32.2-61.1％），移动（3.9-8.1％），灰尘（2.6-7.7％），住宅源（2.1-28.5％）在yrd和来自中国北方的远程运输贡献14.0-28.6％。这表明尽管初级排放极端减少，但它不能完全解决当前的空气污染。将能源和产业战略的重新组织在一起与全面的长期空气污染计划进行跨区域联合控制，需要进一步考虑到全面的长期空气污染计划。

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  • 来源
    《The Science of the Total Environment》 |2020年第25期|139282.1-139282.11|共11页
  • 作者

    Li Li; Qing Li; Ling Huang; Qian Wang; Ansheng Zhu; Jian Xu; Ziyi Liu; Hongli Li; Lishu Shi; Rui Li; Majid Azari; Yangjun Wang; Xiaojuan Zhang; Zhiqiang Liu; Yonghui Zhu; Kun Zhang; Shuhui Xue; Maggie Chel Gee Ooi; Dongping Zhang; Andy Chan;

  • 作者单位

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    Department of Civil Engineering University of Nottingham Malaysia Semenyih 43500 Selangor Malaysia;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    Department of Civil Engineering University of Nottingham Malaysia Semenyih 43500 Selangor Malaysia Institute of Climate Change (IPI) National University of Malaysia (UKM) 43600 Bangi Selangor Malaysia;

    School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Key Laboratory of Organic Compound Pollution Control Engineering (MOE) Shanghai University Shanghai 200444 China;

    Department of Civil Engineering University of Nottingham Malaysia Semenyih 43500 Selangor Malaysia;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Air quality; COVID-19; Yangtze River Delta;

    机译：空气质量;新冠肺炎;长江三角洲;

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