Characterization of NO2 Emissions in the Sichuan Basin based on TROPOMI Data

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  • 1. Plateau Atmosphere and Environment Key Laboratory of Sichuan ProvinceSchool of Atmospheric SciencesChengdu University of Information TechnologyChengdu 610225SichuanChina
    2. Institute of Mountain Hazards and EnvironmentChinese academic scienceChengdu 610041ChinaHeavy Rain and DroughtFlood Disasters in Plateau and Basin Key Laboratory of Sichuan ProvinceChengdu 610041SichuanChina
    3. Jining district garden sanitation service centerInner Mongolia UlanqabUlanqab 012000Inner MongoliaChina

Online published: 2024-10-21

Abstract

This study utilizes a high-resolution emission inventory and the WRF-CMAQ modeling system to analyze the temporal and spatial evolution of tropospheric NO₂ vertical column densityVCDderived from TRO‐ POMI satellite data. It also provides a preliminary assessment of the uncertainty in the NOemission inventory for the Sichuan Basin in 2019. The findings reveal elevated tropospheric NO₂ VCD in areas with intense anthropogenic activityincluding the Chengdu Plainsouthern Sichuan's urban clustersand Chongqingwhile the central Sichuan Basin remains relatively clean. Seasonal variationsinfluenced by both meteorological conditions and anthropogenic emissionsshow significantly higher NO₂ VCD in winter and spring compared to summer and autumn. A comparison between the WRF-CMAQ model and TROPOMI satellite data for January 2019 indicates strong agreement in cleaner regionsthough TROPOMI reports notably higher NO₂ VCD in high-emission cities such as Chengdu and Chongqingsuggesting that the emission inventory may underestimate NOemissions in megacities. This work underscores the need for stringent NOemission controls in major citiessuch as Chengdu and Chongqingwhile also emphasizing the urgency of enhancing emission controls in medium-sized cities across the Sichuan Basin.

Cite this article

YANG Xianyu, BEN Bingzheng, LÜ Yaqiong, WANG Song, WANG Wenlei, HU Qin, WEN Jun, YANG Tong, WANG Ziyi, LI Meixia . Characterization of NO2 Emissions in the Sichuan Basin based on TROPOMI Data[J]. Plateau Meteorology, 0 : 1 . DOI: 10. 7522/j. issn. 1000-0534. 2024. 00033

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