摘要
基于卫星观测具有实时大范围的优势,利用OMI传感器观测数据得到阅兵期间(8.1~9.20)华北地区边界层SO_2柱浓度和对流层NO_2垂直柱浓度,分析2015年减排前(8.1~8.19)、周边减排(8.20~8.27)、全面减排(8.28~9.3)、减排后(9.4~9.20)的SO_2、NO_2浓度变化情况,以及相比于前3年同期分布的变化,评价了阅兵期间北京及周边7省区市联防联控减排措施的效果。研究发现:2015年华北地区SO_2、NO_2浓度均在全面减排期间达到最低值,与前三年同期相比,全面减排期间京津冀地区SO2浓度下降46%,NO_2浓度下降18%;外围地区SO_2浓度下降37%,NO_2浓度下降10%。减排措施取消后,与前三年同期相比,京津冀地区SO2浓度回升到前三年的水平,NO_2浓度增加19%,表明华北地区联动减排措施有效降低了SO_2、NO_2的浓度。卫星凭借实时、大范围的优势,可有效监测污染物的时空分布,为减排措施的制定与评估提供有力的依据。
During the military parade 2015（September 3rd）,emission control measures were implemented in Beijing and surrounding areas.To evaluate the effect of these measures,we use theplanetary boundary layer SO2 column densities and tropospheric NO2 column densities observed from the satellite instruments OMI in this study.We preprocessed satellite data and calculated the average of time and space from August 1 to September 20 in Beijing,Jing-Jin-Ji region and surrounding regions（Shandong,Henan,Shanxi and Inner Mongolia）.Finally,we plotted SO2 and NO2 space distributions of Beijing and North China Plain.We analyzed the space distribution of North China Plain SO2 and NO2 concentration during the period of the military parade 2015.It shows that both SO2 column densities and NO2 column densities reach the minimum during the period of the across-the-board emission reductions.Compared to the past three years（2012-2014）,NO2 and SO2 column densities were found to manifest significant reductions over North China Plain.During the period of emission reductions（Aug.20-Sep.3）,the study showed about 18% and 46% reduction of NO2 and SO2 concentration in the Jing-Jin-Ji region and decrease of NO2 by 10% and SO2 by 37% in the surrounding regions.However,air quality plummeted after the lifting of local and regional joint emission source control measures.Compared to the past three years,it showed increase of NO2 by 19% and SO2 by 1%in the Jing-Jin-Jiregion.SO2 concentration increased by 30% over Beijing especially.It suggests the effectiveness of regional joint emission source control measures.Our study indicates that the emission source control measures were effective in Beijing and surrounding provinces during the military parade.With the advantage of real-time and large-scale,observation from space could be applied to atmospheric pollution monitoring and assessment of emission control measures.
出处
《遥感技术与应用》
CSCD
北大核心
2017年第4期734-742,共9页
Remote Sensing Technology and Application
基金
高分辨率对地观测系统重大专项项目(05-Y20A16-9001-15/17-1)
国家自然科学基金项目(41501476)
关键词
阅兵蓝
卫星遥感
区域大气污染
减排措施
Parade blue
Remote sensing
Regional atmosphere pollutants
Emission control
