| 摘要: |
| 基于2015—2020年近地面NO2质量浓度数据和2019年哨兵-5P TROPOMI卫星探测的对流层NO2柱浓度数据，采用相关性分析、趋势分析等方法探究新疆天山北坡经济带6个城市NO2污染的时空分布特征。结果表明：（1）从年均值来看，天山北坡经济带NO2质量浓度总体呈下降趋势，尤其2018—2020年下降明显。其中乌鲁木齐NO2质量浓度值最高、博乐最低。（2）从季度均值和月均值来看，各城市NO2质量浓度季节变化明显，其中夏季最低、冬季最高；月均值呈“中间低、两头高”的变化特征。（3）从日均值来看，各城市NO2质量浓度大多呈现双峰型分布,分别出现在早上10:00和晚上23:00。（4）从空间分布来看，NO2柱浓度高值区多分布在人口密集和工业发达的城市地区，尤其是乌鲁木齐、昌吉、五家渠、石河子污染最为严重。 |
| 关键词: 天山北坡经济带 二氧化氮 时空分布 大气污染 TROPOMI数据 |
| DOI： |
| 分类号:X823;P422.1 |
| 基金项目:中国沙漠气象科学研究基金项目（Sqj2021011，Sqj2019004，Sqj2017013）；中央级公益性科研院所基本科研业务费专项资金项目（IDM2020001）；国家自然科学基金项目（41575011） |
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| Spatial and Temporal Variations of NO2 in Urbans along the Northern Slope Economic Belt of Tianshan Mountains |
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YU Zhi-xiang, LI Xia, ZHENG Bo-hua1,2,3
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1.Institute of Desert Meteorology, Chinese Meteorological Administration, Urumqi ,Xinjiang Uygur Autonomous Region 830002, China;2.Urumqi Meteorological Satellite Ground Station, Urumqi ,Xinjiang Uygur Autonomous Region 830011, China;3.Xinjiang Weather Modification Office, Urumqi ,Xinjiang Uygur Autonomous Region 830002, China
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| Abstract: |
| Based on the ground observation from 6 stations along the Northern Slope Economic Belt of Tianshan during 2015—2020 and the Sentinel-5P TROPOMI data in 2019, the spatial temporal distribution characteristics of nitrogen dioxide (NO2) were investigated, by using the correlation and trend analysis methods. The results showed that: (1) The NO2 concentration presents a decreasing tendency during 2015—2020, particularly obvious during 2018—2020. NO2concentration is the highest in Urumqi and the lowest in Bole. (2) In terms of annual cycle, the monthly mean NO2 concentration is characterized by a “U” type, reaching the lowest in summer and the highest in winter. (3) As for diurnal cycle, the NO2 concentration presents a significant double peak distribution, occurring at 10:00 in the morning and 23:00 at night, respectively. (4) From the spatial distribution, high values of NO2 column are located at those densely populated and industrially developed urban regions, particularly in the cities of Urumqi, Changji, Wujiaqu, Shihezi. |
| Key words: North Slope Economic Belt of Tianshan NO2 Spatial and temporal distribution Atmospheric pollution TROPOMI data |
