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New indicators for air quality and distribution characteristics of pollutants in China

机译：中国空气质量和污染物分布特征的新指标

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摘要

China has been suffering from an increasingly worse issue of air pollution over these years, which has not only caused a severe impact on the indoor environment, but also presented a tough challenge to clean production and a serious threat to human health. At present, China continues to adopt Air Quality Index (AQI) for the assessment of outdoor air pollution, which takes into consideration only the most serious pollutant and thus neglects the effects of other pollutants during the same period. In consideration of the wide-ranging impact of various pollutants, a new Total Air Quality Index (TAQI) is proposed to describe the widespread effects of six criteria pollutants on air quality. Based on the current indicators applied in China, TAQI could reveal the contribution made by each kind of pollutant to the overall air quality as indicated by Contribution Rate (CR). In this study, the daily average values for the concentration of six pollutants across 103 individual cities nationwide as collected from 2015 to 2017 are taken as the data source. According to the new indicators, the CRs of six pollutants in China are first explored. Then, the pollution situation facing these 103 cities within three years is categorized into five different groups by cluster analysis, and the characteristics of each group are summarized. Finally, the five most representative cities are identified by correlation analysis to explore the seasonal variation characteristics of pollutants. As revealed by this study, particulate matter and NO2 are the primary pollutants, which exhibit a range of obvious spatial and temporal variation characteristics. The findings of this study are expected to draw public attention to the gaseous contaminants (especially NO2), guide the control measures of indoor and outdoor pollutants, and assist with the design of clean air conditioning system.
机译：这些年来，中国一直遭受着越来越严重的空气污染问题，这不仅对室内环境造成了严重影响，而且对清洁生产提出了严峻挑战，对人类健康构成了严重威胁。目前，中国继续采用空气质量指数（AQI）来评估室外空气污染，该指数仅考虑了最严重的污染物，因此忽略了同期其他污染物的影响。考虑到各种污染物的广泛影响，提出了一种新的总空气质量指数（TAQI），以描述六种标准污染物对空气质量的广泛影响。根据中国目前使用的指标，TAQI可以显示出每种污染物对总体空气质量的贡献，如贡献率（CR）所示。在本研究中，以2015年至2017年收集的全国103个单个城市的六种污染物的日均浓度作为数据来源。根据新指标，首先探索了中国六种污染物的残留限量。然后，通过聚类分析，将这103个城市在三年内面临的污染状况分为五个不同的类别，并总结每个类别的特征。最后，通过相关性分析确定了五个最具代表性的城市，以探索污染物的季节变化特征。正如这项研究所揭示的那样，颗粒物和NO2是主要污染物，它们表现出一系列明显的时空变化特征。这项研究的结果有望引起公众对气态污染物（尤其是NO2）的关注，指导室内和室外污染物的控制措施，并协助设计清洁的空调系统。

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  • 来源
    《Building and Environment》 |2020年第4期|106723.1-106723.10|共10页
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  • 作者单位

    Beijing Univ Technol Beijing Key Lab Green Built Environm & Energy Eff Beijing Peoples R China|Tianjin Univ Sch Environm Sci & Engn Tianjin Key Lab Indoor Air Environm Qual Control Tianjin Peoples R China;

    Beijing Univ Technol Beijing Key Lab Green Built Environm & Energy Eff Beijing Peoples R China;

    Beijing Univ Technol Beijing Key Lab Green Built Environm & Energy Eff Beijing Peoples R China|Room 308 Green Bldg 100 Pingleyuan Beijing 100124 Peoples R China;

    Shanghai Jiao Tong Univ Sch Int & Publ Affairs Shanghai Peoples R China;

    Zhengzhou Univ Sch Civil Engn Zhengzhou Peoples R China;

    Tianjin Univ Sch Environm Sci & Engn Tianjin Key Lab Indoor Air Environm Qual Control Tianjin Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Air pollution; Comprehensive air quality index; Classification of pollution situation; Distribution characteristics; Spatial and temporal variations;

    机译：空气污染;综合空气质量指数;污染情况分类;分布特征;时空变化;

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