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Modeling ambient air quality in the Detroit-Windsor airshed.

机译:在底特律-温莎流域模拟环境空气质量。

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摘要

The spatial variability of airborne contaminants in an international airshed was investigated using geostatistics and air dispersion modeling. Analyses were conducted on contaminant species measured in Detroit and Windsor over a two-week period during September 2008. Ordinary kriging with anisotropy and cokriging of measurements with different scales of support were expected to improve estimates generated with autocorrelated ordinary kriging models. Available emissions and meteorological data were also integrated into an air dispersion model to test the feasibility of predicting spatial variability using emissions inventories and traffic estimates for two of the sampled air pollutants, benzene and nitrogen dioxide (NO2).;Results showed no improvement for models incorporating anisotropy. Cokriging improved correlation coefficients and reduced residual statistics for some pollutant concentration estimates compared to ordinary kriging. This suggests that, under favorable conditions, secondary data can be used to increase the spatial resolution of concentration estimates while improving model agreement with field measurements.
机译:使用地统计学和空气扩散模型研究了国际流域中空气传播污染物的空间变异性。在2008年9月的两周内,对在底特律和温莎测量的污染物种类进行了分析。具有各向异性的普通克里格法和在不同支持水平下共同测量的克瑞格法有望改善自动相关的普通克里格法模型产生的估计值。可用的排放量和气象数据也被整合到一个空气扩散模型中,以测试使用排放清单和两种采样空气污染物苯和二氧化氮(NO2)的流量估算来预测空间变异性的可行性;结果表明该模型没有改善纳入各向异性。与普通克里金法相比,共同克里金法提高了相关系数,并减少了某些污染物浓度估算值的残留统计量。这表明,在有利的条件下,可以使用辅助数据来提高浓度估算值的空间分辨率,同时改善与现场测量的模型一致性。

著录项

  • 作者

    Molaroni, Shannon M.;

  • 作者单位

    Wayne State University.;

  • 授予单位 Wayne State University.;
  • 学科 Environmental Geology.;Atmospheric Sciences.
  • 学位 M.S.
  • 年度 2010
  • 页码 158 p.
  • 总页数 158
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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