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

Journals >Journal of Atmospheric and Environmental Optics >Volume 20 >Issue 1 >Page 47 > Article

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

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

YANG Kunpeng^1,*, LIU Haoran^1,2, XING Chengzhi³, SU Wenjing⁴..., HONG Qianqian⁵, LI Qihua¹, JI Xiangguang² and LIU Cheng^3,6|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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DOI: 10.3969/j.issn.1673-6141.2025.01.004 Cite this Article

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 Copy Citation Text

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

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

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

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

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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

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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