长三角城市群臭氧浓度的时空分异及驱动因素

被引:35
作者
黄小刚 [1 ,2 ]
邵天杰 [1 ]
赵景波 [1 ,3 ]
曹军骥 [3 ]
宋永永 [1 ]
机构
[1] 陕西师范大学地理科学与旅游学院
[2] 山西师范大学地理科学学院
[3] 中国科学院地球环境研究所气溶胶化学与物理重点实验室
关键词
臭氧浓度; 时空分异; 驱动因素; 地理探测器; 长三角城市群;
D O I
暂无
中图分类号
X515 [光化学烟雾];
学科分类号
摘要
运用克里金插值、空间自相关分析、冷热点分析和地理探测等定量分析方法,对长三角城市群2015~2017年O3浓度的时空分异特征及驱动因素进行了探讨。结果表明:(1)2015~2017年长三角城市群O3浓度呈上升趋势,O3日最大8 h滑动平均值第90百分位数平均浓度由149μg/m3上升到166μg/m3,平均超标率由9.3%上升到12.1%,以O3为首要污染物的天数占超标总天数的比例由32.3%上升到46.4%。(2)受气温和降水量年际波动的影响,各年份O3月均浓度变化曲线形状不同。但O3超标都主要发生在4~9月,超标天数分别占2015、2016、2017年的88.3%、98.2%和97.0%。(3)由于安徽O3浓度快速上升,长三角城市群O3浓度空间分布格局由东高西低演变为北高南低,且同质化增强、异质性减弱。(4)随着O3浓度的上升,O3浓度热点区由环太湖地区向南京都市圈扩展,冷点区在安徽有明显收缩。(5)地理探测表明,长三角城市群O3浓度空间分异主要受经济规模、城市化和排放源等社会经济因素驱动,且均呈正向影响。自然因素中的降水量和风速呈负向影响,分别对O3有显著的清除和扩散作用。
引用
收藏
页码:1434 / 1445
页数:12
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