基于OMI数据的新疆地区臭氧柱浓度研究

利用臭氧监测仪（OMI）卫星反演数据，对2005~2018年新疆地区大气臭氧柱浓度数据进行提取及分析，探讨其时空分布格局及影响因素.结果表明：在时间变化上，2005~2018年，新疆地区大气臭氧柱浓度整体呈现逐渐上升趋势.在空间分布上，臭氧柱浓度自北向南逐渐降低，高值区集中分布在阿尔泰、塔城北部以及昌吉北部等区域；低值区集中于和田、巴音郭楞蒙古自治州和喀什的南部大部分地区.在季节变化上，大体呈现出春夏季高于秋冬季，高值区在春夏季交替出现，冬季略高于秋季，但四季的臭氧柱浓度值呈现逐渐上升的趋势.稳定性分析表明：研究区域臭氧柱浓度整体呈现中部及南北部分散、东西部集聚的分布格局.自然因素中，气候因素、风场以及海拔均呈现显著正相关（P<0.01）；通过后向轨迹追踪发现，该区域西北和西部气流是臭氧外来的最主要输送路径，分别占总气流轨迹的78.59%、57.29%.人为因素中，臭氧柱浓度值与地区生产总值、煤炭消耗量、工业废气排放量及机动车保有量均表现出显著的正相关关系（P<0.05）.其中，挥发性有机物（VOC_s）主要来源于工业源，其次是交通源和居民源.总体来看，臭氧浓度的变化受到了诸多因素的综合影响，但气温、VOC_s的排放及吸收性气溶胶是大气臭氧浓度变化的主导因素.

Research on ozone column concentration in Xinjiang based on OMI data

Using Ozone Monitor (OMI) satellite inversion data, the atmospheric ozone column concentration data in Xinjiang from 2005 to 2018 were extracted and analyzed, and its temporal and spatial distribution pattern and influencing factors were discussed. The results showed that:In terms of time changes, in the past 14years, the atmospheric ozone column concentration in Xinjiang had shown a gradual upward trend. In spatial distribution, the concentration of ozone column gradually decreases from north to south, and the high value areas were concentrated in Altai, northern Tacheng and northern Changji. The low-value areas were concentrated in Hotan, Bayinguoleng Mongolia Autonomous Prefecture and most of the southern parts of Kashgar. In seasonal variation, the ozone column concentration in spring and summer was higher than that in autumn and winter, the high value area appeared alternately in spring and summer, and the winter was slightly higher than that in autumn, but the ozone column concentration in the four seasons showed a gradual upward trend. Stability analysis showed that the concentration of ozone column in the study area showed a distribution pattern of dispersion in the middle, south and north, and concentration in the east and west. Among the natural factors, climatic factors, wind field and altitude all showed significant positive correlation (P<0.01); Through backward trajectory tracking, it was found that the northwest and west air flows in the region were the most important transportation routes for ozone, and they accounted for the total airflow trajectories 78.59%, 57.29%. In human factors, the concentration of ozone column had a significant positive correlation with regional GDP, coal consumption, industrial waste gas emission and vehicle ownership (P<0.05). Among them, volatile organic compounds (VOCs) mainly comed from industrial sources, followed by traffic sources and residential sources. Generally speaking, the change of ozone concentration was affected by many factors, but air temperature, VOCs emission and absorbing aerosol were the dominant factors.