天山北坡经济带城市NO<sub>2</sub>污染的时空分布特征

于志翔<sup>1; 2</sup>; 李霞<sup>1*</sup>; 郑博华<sup>3</sup>

引用本文:	于志翔,李霞,郑博华.天山北坡经济带城市NO₂污染的时空分布特征[J].环境监控与预警,2023,15(1):36-43
	YU Zhi-xiang, LI Xia, ZHENG Bo-hua.Spatial and Temporal Variations of NO₂ in Urbans along the Northern Slope Economic Belt of Tianshan Mountains[J].Environmental Monitoring and Forewarning,2023,15(1):36-43

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天山北坡经济带城市NO₂污染的时空分布特征
于志翔,李霞,郑博华^1,2,3
1.中国气象局乌鲁木齐沙漠气象研究所，新疆维吾尔自治区乌鲁木齐 830002;2.乌鲁木齐气象卫星地面站，新疆维吾尔自治区乌鲁木齐 830011;3.新疆维吾尔自治区人工影响天气办公室，新疆维吾尔自治区乌鲁木齐 830002

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）

Spatial and Temporal Variations of NO₂ in Urbans along the Northern Slope Economic Belt of Tianshan Mountains

YU Zhi-xiang, LI Xia, ZHENG Bo-hua^1,2,3

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

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