【摘要】 利用OMI传感器卫星反演数据分析2006—2016年宁夏地区大气臭氧时空分布变化趋势及其影响因素,结果表明,时间分布上,11 a间臭氧柱浓度年际变化呈先上升后下降的趋势,2010年达最大值,为368. 23 DU; 2016年达最小值,为287. 57 DU; 2010年之前臭氧柱年均增长率为2. 95%,2010年之后臭氧柱年均减少率为3. 2%。季节上具有明显的变化特征,每年季均浓度值都为春季最大,秋季最小。且11 a平均季均浓度值依然是春季(325. 61 DU)>冬季(290. 92 DU)>夏季(268. 19 DU)>秋季(265. 61 DU);空间分布上,受主导风向北风大气传输的作用,臭氧柱浓度高值区主要分布在研究区北部及西南部地区,并且随着年际变化,臭氧柱浓度高值区表现出由北向南、由东向西移动的变化特征;研究区臭氧柱浓度与几项人为因素相关系数均不高,与大气NO2柱浓度呈负相关,决定系数为0. 683,受前体物光化学反应作用以及主导风向大气传输作用显著。更多还原

【Abstract】 The spatial and temporal distribution tendency,as well as the influencing factors of atmospheric O3 in Ningxia region from 2006 to 2016 were analyzed using the OMI sensor satellite inversion data. For the time distribution,the interannual variation of ozone column concentration increased during the years before 2010,reaching to maximum value of368. 23 DU,and then decreased with the years,reaching a minimum value of 287. 57 DU in 2016. The average annual growth rate of ozone column before 2010 was 2. 95% and then the average annual reduction rate is 3. 2%. The ozone column concentration had an obvious season change characteristics. The seasonal mean concentration was the highest in spring and was the lowest in autumn. The mean seasonal values in 11 years had the same order of spring( 325. 61 DU) > winter( 290. 92 DU) > summer( 268. 19 DU) > autumn( 265. 61 DU). For the spatial distribution,due to the effect of the prevailing wind of the northern atmosphere,the high ozone column concentration areas were mainly distributed in the northern and southwestern regions in the study area. With the interannual changes,the high ozone column concentration areas had the characteristic moving tendency of from north to south and from east to west. The ozone column concentration in the study areas was little affected by several human factors,and it was negatively correlated with atmospheric NO2 column concentration with the correlation coefficient of 0. 683. It was greatly affected by the photochemical reaction of precursors,as well as and atmospheric transport of prevailing wind and north wind.更多还原