Spatiotemporal characteristics of ozone pollution and policy implications in Northeast China
Spatiotemporal characteristics of ozone pollution and policy implications in Northeast China
复制标题
东北地区臭氧污染时空特征及政策启示
DOI：
10.1016/j.apr.2019.11.008
复制
发表时间：
2020-02-01
影响因子：
4.5
通讯作者：
Zhang, Shichun
中科院分区：
文献类型：
--
作者：
Gao, Chao;Xiu, Aijun;Zhang, Shichun
The ground-level ozone (O-3) pollution has become an emerging air quality issue in China. To effectively mitigate ozone pollution in Northeast China (NEC), this study focuses on its characteristics based on the surface ozone, meteorological data, and Ozone Monitoring Instrument (OMI) satellite data. Statistical methods are applied to analyze the effects of meteorology on O-3 pollution. The results show that the area and annual averaged maximum 8-h average O-3 concentrations rose from 81.3 to 87.4 mu g/m(3) during 2015-2018 and the nonattainment days kept increasing. The ground-observed O-3 concentrations and OMI ozone vertical column densities (VCDs) displayed the pattern of highs in the southwest and lows the northeast of the NEC region with the exceedance areas mainly located over the Liaoning and Jilin provinces in spring and summer. The long-term series of O-3, HCHO and NO2 VCDs averaged over NEC all exhibited annual upward trends. Indicated by the OMI HCHO/NO2 ratio, the seasonal and spatial O-3 -VOCs-NO sensitivities in NEC provide the control measure guidance for government agencies. Also the ozone control measure needs to consider the biogenic emissions along with the anthropogenic VOCs emissions due to the vast forest areas and large-scale agricultural production in NEC. The ozone pollution episodes in NEC were correlated with weather conditions of high temperature, low relative humidity, long sunshine duration and southwesterly wind in summer and the impact of the East Asia summer monsoon cannot be ignored. Future investigation into VOCs' measurements and emission inventories are much needed for ozone pollution control in NEC.
