2014—2017年四川盆地与京津冀地区冬季空气停滞特征及大气质量改善评估对比分析

被引:14
作者
欧阳正午 [1 ]
廖婷婷 [1 ]
陈科艺 [1 ]
罗浩林 [1 ]
陈智海 [1 ]
胡成媛 [1 ]
桂柯 [2 ]
吴佳奇 [1 ]
刘星辉 [1 ]
吴锴 [1 ]
机构
[1] 成都信息工程大学大气科学学院高原大气与环境四川省重点实验室
[2] 中国气象科学研究院大气成分研究所
基金
国家自然科学基金重大研究计划; 国家重点研发计划;
关键词
空气停滞; PM2.5; 京津冀地区; 四川盆地; 大气质量改善评估;
D O I
10.13671/j.hjkxxb.2019.0117
中图分类号
X513 [粒状污染物]; X824 [水质评价];
学科分类号
0706 ; 070602 ; 071012 ; 0713 ; 083002 ;
摘要
对2014—2017年四川盆地和京津冀地区气象数据和污染物浓度数据进行综合评估,在原有全球空气停滞日判别标准基础上发展出本地化空气停滞指数阈值,并以提高两个区域空气质量优良天数为目的建立模型,计算各城市空气停滞发生时PM2.5污染上限浓度参考值.本研究得出,四川盆地和京津冀地区本地化空气停滞日判别标准分别为地面风速<2.5 m·s-1、边界层高度<500 m和地面风速<3 m·s-1、边界层高度<300 m.四川盆地冬季空气停滞发生频率四周高,中心小,空气停滞对空气质量的影响西部高于东部;京津冀中部和南部空气停滞频率发生高,空气停滞对空气质量的影响呈现显著的南北差异.四川盆地以成都为中心城市群及京津冀中部和南部地区的高污染排放强度和高空气停滞频率导致重污染事件的频发.本文对我国两个冬季重污染高发的区域进行深入研究,更为客观、量化地评估4年来区域空气质量实际改善程度并初步建立空气质量目标管理模型,以期为区域空气质量达标管理提供可靠的科学依据.
引用
收藏
页码:2353 / 2361
页数:9
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