| PM2.5和O3污染协同防控区的遥感精细划定与分析 |
| 摘要点击 3778 全文点击 1512 投稿时间：2021-12-07 修订日期：2022-02-24 |
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| 中文关键词 大气污染 大气遥感 PM2.5 臭氧(O3) 协同防控 |
| 英文关键词 air pollution atmospheric remote sensing PM2.5 ozone(O3) synergetic prevention and control |
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| 中文摘要 |
| 针对地面站点监测数据难以支撑大气PM2.5与O3污染防控区边界划定的问题，融合大气污染浓度遥感估算建模与GIS统计分析模型，提出了一种基于PM2.5和O3浓度遥感估算结果的协同防控区精细划定方法，开展了2015~2020年月和年尺度的全国PM2.5与O3污染协同防控成效定量分析与防控区精细划定研究.结果表明，2015~2020年，我国PM2.5浓度总体下降显著但O3浓度基本持平，PM2.5污染在秋冬超标严重，O3污染则在春夏；同时PM2.5与O3浓度变化在空间上的不一致性显著，其中PM2.5下降且O3上升、PM2.5与O3均下降、PM2.5与O3均上升和PM2.5上升O3下降的面积占比分别为38.34%、35.12%、15.24%和10.89%.遥感精细划定范围显示，PM2.5和O3协同防控区域的边界具有显著动态变化特征，在时间变化上呈现先扩大后缩小的趋势，主体范围集中在"2+26"城市、汾渭平原、长三角北部和山东半岛.以PM2.5或O3单一防控为主的区域范围较为稳定，辽吉、鄂湘赣、成渝和塔克拉玛干沙漠-河西走廊区域需以PM2.5防控为主，珠三角、长三角和环渤海湾部分区域则应以O3防控为主.基于卫星遥感手段的PM2.5和O3协同防控区域边界精细划定方法可更好辅助国家PM2.5和O3协同防控策略制定需求. |
| 英文摘要 |
| Site-based air pollution monitoring data cannot support the regionalization of air pollution prevention and control areas. Faced with this problem, this study proposed a method of regionalizing synergetic prevention and control areas based on multi-source remote sensing data and GIS spatial statistical analysis methods and carried out quantitative analyses of PM2.5 and O3 air pollution in China from 2015 to 2020. The results showed that there was an obvious decrease in PM2.5 concentrations, and O3concentrations remained stable; PM2.5 pollution mostly occurred in autumn and winter, and O3 pollution occurred in spring and summer. A significant spatial inconsistency was shown between the change rate of PM2.5 and O3 concentrations, in which the proportions of PM2.5 decreasing and O3 increasing, PM2.5 and O3 both decreasing, PM2.5 and O3 both increasing, and PM2.5 increasing and O3 decreasing accounted for 38.34%, 35.12%, 15.24%, and 10.89%, respectively. The results also showed that the boundary of PM2.5 and O3 synergetic prevention and control areas was dynamic during 2015 and 2020, showing a trend of expanding from 2015 to 2018 and then becoming smaller after 2019. Generally, the scope of PM2.5 and O3 synergetic prevention and control areas was concentrated in "2+26" cities, Fenwei plain, north of the Yangtze River Delta, and Shandong. In contrast, the regional scopes of "PM2.5 first" and "O3 first" were relatively stable. Areas of "PM2.5 first" were mainly carried out in Liaoning-Jilin, Hubei-Hunan-Jiangxi, Chengdu-Chongqing, and Taklimakan-Hexi Corridor, whereas "O3 first" areas were mainly in specific regions of the Pearl River Delta, Yangtze River Delta, and surrounding areas of Bohai Bay. Remote sensing-based PM2.5 and O3 mapping has the advantages of full-coverage and fine spatial simulation, which can support the regionalization of synergetic prevention and control areas and implementation of policies. |
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