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

  • Xianyu YANG ,
  • Bingzheng BEN ,
  • Yaqiong Lü ,
  • Song WANG ,
  • Wenlei WANG ,
  • Qin HU ,
  • Jun WEN ,
  • Tong YANG ,
  • Ziyi WANG ,
  • Meixia LI
Expand
  • 1. Plateau Atmosphere and Environment Key Laboratory of Sichuan Province,School of Atmospheric Sciences,Chengdu University of Information Technology,Chengdu 610225,Sichuan,China
    2. Institute of Mountain Hazards and Environment,Chinese Academic Science,Chengdu 610041,Sichuan,China
    3. Jining District Garden Sanitation Service Center,Inner Mongolia Ulanqab,Ulanqab 012000,Inner Mongolia,China

Received date: 2023-10-19

  Revised date: 2024-03-11

  Online published: 2024-11-23

Abstract

This study utilizes a high-resolution emission inventory and the WRF-CMAQ modeling system to analyze the temporal and spatial evolution of tropospheric NO? vertical column density (VCD) derived from TROPOMI satellite data. It also provides a preliminary assessment of the uncertainty in the NO? emission inventory for the Sichuan Basin in 2019. The findings reveal elevated tropospheric NO? VCD in areas with intense anthropogenic activity, including the Chengdu Plain, southern Sichuan's urban clusters, and Chongqing, while the central Sichuan Basin remains relatively clean. Seasonal variations, influenced by both meteorological conditions and anthropogenic emissions, show significantly higher NO? 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 regions, though TROPOMI reports notably higher NO? VCD in high-emission cities such as Chengdu and Chongqing, suggesting that the emission inventory may underestimate NO? emissions in megacities. This work underscores the need for stringent NO? emission controls in major cities, such as Chengdu and Chongqing, while also emphasizing the urgency of enhancing emission controls in medium-sized cities across the Sichuan Basin.

Cite this article

Xianyu YANG , Bingzheng BEN , Yaqiong Lü , Song WANG , Wenlei WANG , Qin HU , Jun WEN , Tong YANG , Ziyi WANG , Meixia LI . Characterization of NO2 Emissions in the Sichuan Basin based on TROPOMI Data[J]. Plateau Meteorology, 2024 , 43(6) : 1550 -1558 . DOI: 10.7522/j.issn.1000-0534.2024.00033

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