Analysis of tropospheric ozone characterization in Pearl River Delta region based on TROPOMI

YANG Kunpeng; LIU Haoran; XING Chengzhi; SU Wenjing; HONG Qianqian; LI Qihua; JI Xiangguang; LIU Cheng

doi:10.3969/j.issn.1673-6141.2025.01.004

Journal of Atmospheric and Environmental Optics, Volume. 20, Issue 1, 47(2025)

Analysis of tropospheric ozone characterization in Pearl River Delta region based on TROPOMI

YANG Kunpeng1,*... LIU Haoran1,2, XING Chengzhi3, SU Wenjing4, HONG Qianqian5, LI Qihua1, JI Xiangguang2, and LIU Cheng36 |Show fewer author(s)

Author Affiliations

¹Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China

²Information Materials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei 230601, China

³Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China

⁴Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China

⁵School of Atmosphere and Remote Sensing, Wuxi University, Wuxi 214105, China

⁶Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei 230026, China

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Fig. 1. Correlation analysis of tropospheric VCD measured by TROPOMI and Shenzhen MAX-DOAS station. (a) NO₂; (b) HCHO

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Fig. 2. The average VCD distribution of tropospheric NO₂ (a) and HCHO (b) in PRD from September 2019 to February 2020

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Fig. 3. The average tropospheric VCD variation of NO₂ (a) and HCHO (b) in PRD from September 2019 to February 2020

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Fig. 4. The monthly relative changes of industrial NO_x emissions (relative to September 2019) in PRD from September 2019 to February 2020

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Fig. 5. The average VCD distribution of tropospheric O₃ in PRD from September 2019 to February 2020

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Fig. 6. The average tropospheric VCD variation of O₃ in PRD from September 2019 to February 2020

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Fig. 7. The averaged ozone formation sensitivity regime in autumn (September 2019 to November 2019) (a) and winter (December 2019 to February 2020) (b) time of the PRD region

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Fig. 8. The averaged ozone formation sensitivity regime in urban (a) and rural (b) areas of the PRD region from September 2019 to February 2020

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Table 1. Ozone formation sensitivity regimes' thresholds and VCD correlation analysis of HCHO，NO₂ with O₃
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Table 1. Ozone formation sensitivity regimes' thresholds and VCD correlation analysis of HCHO，NO₂ with O₃
Regime Thresholds HCHO VCD with O₃ VCD NO₂ VCD with O₃ VCD
Slope R² Slope R²
VOCs-limited < 1.0 28.63 0.84 3.56 0.31
Transition 1.0–2.0 3.60 0.14 4.29 0.15
NO_x-limited > 2.0 4.09 0.12 10.81 0.30

Table 2. The VCD of ozone and its precursor and proportion of each ozone formation sensitivity regime in urban and rural areas in PRD by month

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Table 2. The VCD of ozone and its precursor and proportion of each ozone formation sensitivity regime in urban and rural areas in PRD by month

Time	Urban areas						Rural areas
Time	NO₂VCD/ (molec·cm^-2)	HCHO VCD/ (molec·cm^-2)	O₃ VCD /DU	VOCs-limited regime/%	Transition regime/%	NO_x-limited regime /%	NO₂ VCD/ (molec·cm^-2)	HCHO VCD/ (molec·cm^-2)	O₃ VCD/DU	VOCs-limited regime /%	Transition regime/%	NO_x-limited regime /%
2019-09	7.49 × 10¹⁵	1.62 × 10¹⁶	38.23	0.11	31.02	68.86	3.37 × 10¹⁵	1.22 × 10¹⁶	36.43	0.02	1.66	98.31
2019-10	8.36 × 10¹⁵	1.70 × 10¹⁶	45.94	0.70	39.45	59.85	3.73 × 10¹⁵	1.15 × 10¹⁶	44.03	0.14	3.63	96.23
2019-11	1.35 × 10¹⁶	1.42 × 10¹⁶	38.82	37.23	52.96	9.81	4.62 × 10¹⁵	1.01 × 10¹⁶	37.04	2.97	19.95	77.07
2019-12	1.79 × 10¹⁶	9.12 × 10¹⁵	36.65	77.80	17.09	5.12	4.84 × 10¹⁵	7.59 × 10¹⁵	35.83	13.62	21.80	64.58
2020-01	9.59 × 10¹⁵	9.47 × 10¹⁵	38.71	45.81	42.59	11.60	3.16 × 10¹⁵	7.76 × 10¹⁵	38.70	2.90	17.45	79.66
2020-02	5.31 × 10¹⁵	9.34 × 10¹⁵	43.78	1.34	55.96	42.70	2.25 × 10¹⁵	7.88 × 10¹⁵	44.01	0.15	5.92	93.94

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Kunpeng YANG, Haoran LIU, Chengzhi XING, Wenjing SU, Qianqian HONG, Qihua LI, Xiangguang JI, Cheng LIU. Analysis of tropospheric ozone characterization in Pearl River Delta region based on TROPOMI[J]. Journal of Atmospheric and Environmental Optics, 2025, 20(1): 47

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Paper Information

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Received: Jan. 14, 2023

Accepted: --

Published Online: Feb. 21, 2025

The Author Email: Kunpeng YANG (kpy@stu.ahu.edu.cn)

DOI:10.3969/j.issn.1673-6141.2025.01.004

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Instrumentation, Measurement and Metrology

Table 1. Ozone formation sensitivity regimes' thresholds and VCD correlation analysis of HCHO，NO2 with O3

Table 1. Ozone formation sensitivity regimes' thresholds and VCD correlation analysis of HCHO，NO2 with O3

Table 2. The VCD of ozone and its precursor and proportion of each ozone formation sensitivity regime in urban and rural areas in PRD by month

Table 2. The VCD of ozone and its precursor and proportion of each ozone formation sensitivity regime in urban and rural areas in PRD by month

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Table 1. Ozone formation sensitivity regimes' thresholds and VCD correlation analysis of HCHO，NO₂ with O₃

Table 1. Ozone formation sensitivity regimes' thresholds and VCD correlation analysis of HCHO，NO₂ with O₃