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Distribution of Fine Particulate Matter Pollution in Winter over Eastern China Affected by Synoptic Conditions.
- Source :
- Atmosphere; Jul2024, Vol. 15 Issue 7, p821, 18p
- Publication Year :
- 2024
-
Abstract
- Based on the mean sea level pressure field and 10-meter wind field across eastern China, weather patterns were classified using principal component analysis in the T-model (T-PCA), and four weather conditions were identified. Weather conditions and meteorological factors affecting the winter PM<subscript>2.5</subscript> concentration in the Beijing–Tianjin–Hebei (BTH) region and the Yangtze River Delta (YRD) were also analyzed. The results showed that there were significant differences in the PM<subscript>2.5</subscript> distribution between BTH and the YRD under different weather conditions. The intensity and path of cold air played important roles in regulating the PM<subscript>2.5</subscript> concentration distribution in eastern China. For the BTH region, under type 2 and type 4 conditions, the weather was stable, and heavy pollution frequently occurred; however, under type 1 and type 3 conditions, cold air was active, and the air quality improved. For the YRD, both type 1 and type 4 conditions lead to high PM<subscript>2.5</subscript> concentrations in this region. Type 1 cold air flows southward along the northwestern path and is beneficial for transporting pollutants from BTH to the YRD, causing a high probability of PM<subscript>2.5</subscript> pollution. Conversely, the southward movement of type 3 cold air along the eastern path was beneficial for pollutant diffusion in the YRD. [ABSTRACT FROM AUTHOR]
- Subjects :
- WEATHER
PRINCIPAL components analysis
PARTICULATE matter
AIR flow
AIR quality
Subjects
Details
- Language :
- English
- ISSN :
- 20734433
- Volume :
- 15
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Atmosphere
- Publication Type :
- Academic Journal
- Accession number :
- 178698295
- Full Text :
- https://doi.org/10.3390/atmos15070821