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A new approach to estimate pollutant emissions based on trajectory modeling and its application in the North China Plain

机译：基于轨迹模型的污染物排放估算新方法及其在华北平原的应用

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摘要

Emission information is crucial for air quality modeling and air quality management. In this study, a new approach based on the understanding of the relationship between emissions and measured pollutant concentrations has been proposed to estimate pollutant emissions and source contributions. The retrieval can be made with single point in-situ measurements combined with backward trajectory analyses. The method takes into consideration the effect of planetary boundary layer height on pollutant mixing and transport. It is independent of energy statistics and therefore can provide frequent updates on emission information. The spatial coverage can be further improved by using measurements from several sites and combining the derived emission fields. The method was applied to yield the source distributions of black carbon (BC) and CO in the North China Plain (NCP) using in-situ measurements from the HaChi (Haze in China) Campaign and to evaluate contributions from specific areas to local concentrations at the measurement site.Results show an emission field for the NCP that is comparable to the INTEX-B inventory can be retrieved and directly applied to quantify areal source contributions. Compared to emissions in 2006, increased CO and BC emissions were found. Uncertainty analyses show that in-situ measurements of CO and BC bear errors below 0.1 ppm and 12%, respectively. WRF model underestimates the PBLH under stable conditions. On average, an error of 1% in the modeled PBLH results in 1% variation in the derived emissions. The trajectory displacement errors are mostly within 1.5 times the grid size.
机译：排放信息对于空气质量建模和空气质量管理至关重要。在这项研究中，提出了一种基于对排放量与污染物浓度之间关系的理解的新方法来估算污染物排放量和污染源。可以通过单点原位测量与后向轨迹分析相结合来进行检索。该方法考虑了行星边界层高度对污染物混合和运输的影响。它独立于能源统计信息，因此可以提供有关排放信息的频繁更新。通过使用几个站点的测量值并结合派生的发射场，可以进一步提高空间覆盖率。该方法用于通过HaChi（中国烟霾）运动的原位测量得出华北平原（NCP）的黑碳（BC）和一氧化碳的源分布，并评估特定地区对当地浓度在当地的贡献。结果显示，可以检索到与INTEX-B库存相当的NCP发射场，并可以直接将其用于量化面源贡献。与2006年的排放量相比，发现CO和BC排放量增加了。不确定性分析表明，CO和BC的原位测量误差分别低于0.1 ppm和12％。 WRF模型在稳定条件下低估了PBLH。平均而言，在模型化的PBLH中误差为1％会导致派生排放量变化1％。轨迹位移误差大多在网格尺寸的1.5倍以内。

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  • 来源
    《Atmospheric environment》 |2013年第6期|75-83|共9页
  • 作者

    W.Y. Xu; C.S. Zhao; L. Ran; Z.Z. Deng; N. Ma; P.F. Liu; W.L. Lin; P. Yan; X.B. Xu;

  • 作者单位

    Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, China;

    Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, China;

    Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China;

    Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China;

    Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, China;

    Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, China;

    Meteorological Observation Center, China Meteorological Administration, Beijing 100081, China;

    Meteorological Observation Center, China Meteorological Administration, Beijing 100081, China;

    Key Laboratory for Atmospheric Chemistry, Centre for Atmosphere Watch and Services, Chinese Academy of Meteorological Sciences,China Meteorological Administration, Beijing 100081, China;

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

    emission; source; trajectory; retrieval; black carbon; carbon monoxide;

    机译：排放;源;轨迹;回收;黑碳;一氧化碳;

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