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兰州冬季大气污染来源分析

刘 娜 余 晔 何建军 赵素平

刘 娜, 余 晔, 何建军, 赵素平. 兰州冬季大气污染来源分析[J]. 环境科学研究, 2015, 28(4): 509-516.
引用本文: 刘 娜, 余 晔, 何建军, 赵素平. 兰州冬季大气污染来源分析[J]. 环境科学研究, 2015, 28(4): 509-516.
LIU Na, YU Ye, HE Jianjun, ZHAO Suping. Analysis of Air Pollutant Transport in Winter in Lanzhou[J]. Research of Environmental Sciences, 2015, 28(4): 509-516.
Citation: LIU Na, YU Ye, HE Jianjun, ZHAO Suping. Analysis of Air Pollutant Transport in Winter in Lanzhou[J]. Research of Environmental Sciences, 2015, 28(4): 509-516.

兰州冬季大气污染来源分析

基金项目: 中国科学院“百人计划”项目(29O837631);兰州市科技攻关计划项目(2009KJLQ)

Analysis of Air Pollutant Transport in Winter in Lanzhou

  • 摘要: 利用WRF(天气研究与预报模式)输出的高分辨率气象数据驱动HYSPLIT_4.9(混合单粒子拉格朗日轨迹模式),结合PSCF(潜在源贡献因子)和CWT(权重浓度轨迹分析)模拟研究复杂地形下兰州城市尺度大气污染物局地输送特征、潜在源区及其对空气质量的影响. 结果表明:2002—2008年影响兰州城区冬季12月空气质量的轨迹可分为5类,输送类型可分为城区内输送和城区外输送. 第1、3类轨迹出现频率均大于20%且污染轨迹出现频率均大于38%,是污染物的主要输送路径,对应潜在源区为兰州城关区东北部和榆中县东部,这2个源区对ρ(PM10)的影响最大,对ρ(SO2)的影响最小,对ρ(PM10)、ρ(SO2)和ρ(NO2)的贡献分别超过200、80和60 μg/m3. 来自榆中县的第4类轨迹和兰州西固区的第5类轨迹易造成大气重污染,而来自皋兰县的第2类轨迹属于清洁轨迹. 兰州冬季污染既受局地输送的影响,也与地面天气形势密切相关.

     

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  • 刊出日期:  2015-04-25

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