[Meteorological Influences on Annual Variation and Trend of Autumn Surface Ozone in the Pearl River Delta].
Huan Jing Ke Xue
; 45(7): 3808-3814, 2024 Jul 08.
Article
en Zh
| MEDLINE
| ID: mdl-39022929
ABSTRACT
Based on the ozone ï¼O3ï¼ monitoring data of the Pearl River Delta ï¼PRDï¼ from 2015 to 2022 and the reanalysis of meteorological data, the impact of meteorological conditions on the annual variation and trends of the maximum daily 8-hour average O3 concentration ï¼MDA8-O3ï¼ were quantified using multiple linear regression ï¼MLRï¼ and LMG methods. The results indicated that the MLR model constructed using meteorological parameters from individual months in autumn better simulated the variation in MDA8-O3 compared to that in the model built using meteorological parameters from the entire autumn season. The combined influence of total cloud cover, relative humidity, 2 m maximum temperature, and 850 hPa zonal wind led to a reduction of 34.1 µg·m-3 in MAD8-O3 in 2020 compared to that in 2019, with contributions of 31.3%, 45.2%, 15.8%, and 6.7%, respectively. The observed trends of MDA8-O3 in the PRD for September, October, November, and the autumn season during 2015-2022 were 7.3, 5.2, 4.8, and 5.8 µg·ï¼m3·aï¼-1, respectively. Among these, the trends driven by meteorological factors were 3.6, 2.4, 2.4, and 3.1 µg·ï¼m3·aï¼-1. Overall, meteorological conditions contributed 53.4% to the variations in autumn MDA8-O3 in the PRD from 2015 to 2022.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
Zh
Revista:
Huan Jing Ke Xue
Año:
2024
Tipo del documento:
Article
País de afiliación:
China