基于数值模拟的长三角污染气象敏感区研析
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摘要
为深入探讨污染气象条件对环境空气质量的影响,识别气象条件驱动下长三角地区易产生污染的区域,利用WRF-CMAQ空气质量数值模型,在区域设置均一大气污染物排放强度的情景下,模拟SO_2、NO_x、PM_(10)、PM_(2.5)等主要大气污染因子在区域内的空间分布,并利用污染气象敏感指数识别长三角地区污染气象敏感区域。结果显示,大气污染物浓度分布总体呈现由沿海到内陆逐渐升高趋势;从区域内部来看,江苏西南部地区、浙江中西部地区污染扩散条件较差,该类污染物易集聚区域应实行更为严格的空间管控。
To assess the influence of meteorological conditions on air quality and identify areas prone to air pollution caused by meteorological conditions, the WRF-CMAQ is applied to simulate the spatial distributions of major atmospheric pollutants(SO_2, NO_x, PM_(10), PM_(2.5)) with uniform emission intensity in each modeling grid. The meteorological pollution sensitivity index is used to identify the areas which are sensitive to the meteorological conditions in the Yangtze River Delta region(YRD). The results show that the distribution of air pollutants concentration generally increased from coast to inland, which indicates diffusion conditions in the inland areas are poor. Moreover, the poor diffusion areas mostly distribute in Southwest Jiangsu and Midwest Zhejiang, which need to take more strict spatial control measures to reduce air pollution.
To assess the influence of meteorological conditions on air quality and identify areas prone to air pollution caused by meteorological conditions, the WRF-CMAQ is applied to simulate the spatial distributions of major atmospheric pollutants(SO_2, NO_x, PM_(10), PM_(2.5)) with uniform emission intensity in each modeling grid. The meteorological pollution sensitivity index is used to identify the areas which are sensitive to the meteorological conditions in the Yangtze River Delta region(YRD). The results show that the distribution of air pollutants concentration generally increased from coast to inland, which indicates diffusion conditions in the inland areas are poor. Moreover, the poor diffusion areas mostly distribute in Southwest Jiangsu and Midwest Zhejiang, which need to take more strict spatial control measures to reduce air pollution.
引文
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[2] 许亚宣,李小敏,于华通,等.长三角区域O3污染分布特征与影响因素[J].环境影响评价,2018,40(5):26- 30.
[3] Skamarock W C.A description of the advanced research WRF version 3[J].Ncar Technical,2006,113:7- 25.
[4] Byun D,Schere K L.Review of the governing equations,computational algorithms,and other components of the models-3 Community Multiscale Air Quality (CMAQ) modeling system[J].Applied Mechanics Reviews,2006,59(2):51- 77.
[5] 安静宇.长三角地区冬季大气细颗粒物来源追踪模拟研究[D].上海:东华大学,2015.
[6] Yarwood G,Rao S,Yocke M,et al.Updates to the Carbon Bond Chemical Mechanism:CB05[R].2005.
[7] Nenes A,Pandis S N,Pilinis C.ISORROPIA:A new thermodynamic equilibrium model for multiphase multicomponent inorganic aerosols[J].Aquatic Geochemistry,1998,4(1):123- 152.