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基于细模态AOT的中国PM0.5时空分布特征

尉 鹏 任阵海 王文杰 苏福庆 高庆先

尉 鹏, 任阵海, 王文杰, 苏福庆, 高庆先. 基于细模态AOT的中国PM0.5时空分布特征[J]. 环境科学研究, 2014, 27(9): 943-950.
引用本文: 尉 鹏, 任阵海, 王文杰, 苏福庆, 高庆先. 基于细模态AOT的中国PM0.5时空分布特征[J]. 环境科学研究, 2014, 27(9): 943-950.
WEI Peng, REN Zhen-hai, WANG Wen-jie, SU Fu-qing, GAO Qing-xian. Temporal and Spatial Distributions of PM0.5 in China Based on Fine Mode Aerosol Optical Thickness[J]. Research of Environmental Sciences, 2014, 27(9): 943-950.
Citation: WEI Peng, REN Zhen-hai, WANG Wen-jie, SU Fu-qing, GAO Qing-xian. Temporal and Spatial Distributions of PM0.5 in China Based on Fine Mode Aerosol Optical Thickness[J]. Research of Environmental Sciences, 2014, 27(9): 943-950.

基于细模态AOT的中国PM0.5时空分布特征

基金项目: 中央级公益性科研院所基本科研业务专项(2013YSKY-05)

Temporal and Spatial Distributions of PM0.5 in China Based on Fine Mode Aerosol Optical Thickness

  • 摘要: 利用2006—2011年PARASOL卫星细模态AOT(aerosol optical thickness,气溶胶光学厚度)的观测值,探讨中国PM0.5.5浓度的时空分布特征,并对中国与全球PM0.5的空间分布进行对比分析. 结果表明:细模态AOT高值出现在中国、非洲中部和南美洲,分别为0.5~1.0、0.4~0.9和0.4~0.6,反映出这些地区PM0.5污染严重. 在中国范围内,细模态AOT高值区主要分布在6个区域,包括重庆市、四川省成都市及其周边地区,华北平原地区,湖北省和湖南省的两湖平原地区,广西壮族自治区,珠三角地区,陕西渭河平原以及山西汾河河谷地区,各区域细模态AOT最大值分别为1.1、0.9、1.0、1.0、1.1和0.8,这些PM0.5污染严重地区的分布与SO2、OC、VOC、NOx等的污染源及其排放强度分布特征相一致,并且PM0.5浓度呈逐年升高趋势. 2006—2011年,冬、春季细模态AOT平均值升高了18.09%,而夏、秋季平均值升高了9.00%,表明冬、春季PM0.5浓度显著高于夏、秋季. 细模态AOT的多年月均值变化表明,其较高值出现在1月、3月,分别为0.37、0.36,最低值(0.18)出现在8月. 但在局部地区,如华北地区(115°E~125°E、33°N~42°N),细模态AOT表现为夏季高于冬季. 主要原因是华北地区受夏季副热带高压以及太阳辐射的影响,加强了南方污染物的长距离输送以及大气光化学反应,致使该地区夏季PM0.5浓度增高.

     

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  • 收稿日期:  2014-02-11
  • 修回日期:  2014-06-09
  • 刊出日期:  2014-09-25

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