摘要
基于环境空气质量站点数据及卫星遥感数据,研究了河南省近地面臭氧(O_(3))2015~2020年变化特征、趋势和生成敏感性.结果表明,2015~2020年,河南省近地面O_(3)浓度先上升后下降,2018年浓度最高,O_(3)日最大8 h滑动平均值(MDA8)年均值为110.70μg·m^(-3),各站点间的MDA8值差异逐渐缩小;河南省月均MDA8时间序列表现为上升趋势,增长速率为2.46μg·(m^(3)·a)^(-1),经Mann-Kendall趋势检验,除漯河、南阳和平顶山市外其它地市上升趋势均具有显著性意义(P<0.05);6 a间四季MDA8浓度也呈增长趋势,增长大小为:秋季(19.31%)>冬季(17.09%)>春季(16.82%)>夏季(7.24%);2015~2019年河南省对流层NO_(2)高值集中在西北部,浓度呈下降趋势,下降速率为0.34×10^(15) molecules·(cm^(2)·a)^(-1),对流层HCHO呈缓慢上升趋势,年增速为0.19×10^(15)molecules·(cm^(2)·a)^(-1),空间上北部城市城区浓度较高;O_(3)生成敏感性控制区表明,河南省东部大部分城市属于VOCs控制区.
Based on air quality station data and satellite remote sensing data,the interannual variation characteristics and seasonal variation trends of near-surface ozone(O_(3))in Henan province were studied,and the variation in O_(3)sensitivity was analyzed.The results showed that the O_(3)concentration near the surface of Henan province increased first and then decreased from 2015 to 2020.The highest O_(3)concentration was found in 2018,and the annual mean of the maximum daily 8 h moving mean(MDA8)of O_(3)was 110.70μg·m^(-3).The difference in MDA8 values among different stations gradually decreased.From 2015 to 2020,the average monthly MDA8 in Henan province showed an upward trend,with a growth rate of 2.46μg·(m^(3)·a)^(-1).According to the MK trend test,except for in Luohe,Nanyang,and Pingdingshan,the rising trend in other cities was significant(P<0.05).The concentration of MDA8 in the four seasons also showed an increasing trend during the 6 years as follows:autumn(19.31%)>winter(17.09%)>spring(16.82%)>summer(7.24%).From 2015 to 2019,the high value of tropospheric NO_(2) was concentrated in the northwest of Henan province,and the concentration showed a decreasing trend with a decreasing rate of 0.34×10^(15) molecules·(cm^(2)·a)^(-1),whereas the tropospheric HCHO showed a slow rising trend with an annual growth rate of 0.19×10^(15)molecules·(cm^(2)·a)^(-1),with a higher concentration in the northern urban area.The O_(3)sensitivity control area from 2015 to 2019 showed that most of the eastern part of Henan province belonged to the VOCs limited category.
作者
晏洋洋
尹沙沙
何秦
秦凯
张瑞芹
YAN Yang-yang;YIN Sha-sha;HE Qin;QIN Kai;ZHANG Rui-qin(College of Chemistry,Zhengzhou University,Zhengzhou 450001,China;School of Ecology and Environment,Zhengzhou University,Zhengzhou 450001,China;School of Environment and Spatial Informatics,China University of Mining and Technology,Xuzhou 221008,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2022年第6期2947-2956,共10页
Environmental Science
基金
国家重点研发计划项目(2017YFC0212403)
国家自然科学基金青年科学基金项目(41907187)。
