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Real-Time Source Apportionment of PM 2.5 Highlights the Importance of Joint Controls on Atmospheric Pollution in Cold Region of China.
- Source :
- Remote Sensing; Aug2022, Vol. 14 Issue 15, p3770-3770, 17p
- Publication Year :
- 2022
-
Abstract
- Harbin is a northmost megacity in the cold regions of China and experiences severe PM<subscript>2.5</subscript> pollution. However, comprehensive investigations for severe haze formation are few. In this study, we simultaneously measured aerosol composition in real time to assess the sources apportionment, regional transport and its interaction with meteorology from 1 October 2018 to 1 May 2019 by using the single particle aerosol mass spectrometer (SPAMS). The daily average PM<subscript>2.5</subscript> concentration was 51.21 µg/m<superscript>3</superscript> with the hourly maximum of 900.45 µg/m<superscript>3</superscript>. Winter coal combustion was the largest source of PM<subscript>2.5</subscript> aerosols during this period. Open straw burning from surrounding and adjacent areas by short-distance transport could aggravate air quality deterioration in Harbin. Three extreme haze events (i.e., Ep1, Ep2 and Ep3) were observed in this study, showing the typical characteristics of local winter pollution. The pollutants of PM<subscript>2.5</subscript> and SO<subscript>2</subscript> emitted from coal combustion played an important role in haze episode during Ep1, whereas Ep2 was caused by the joint effect of coal combustion and straw burning. Ep3 was characterized by long-distance transport of windblown dust from southeast Inner Mongolia and northwest Harbin. Real-time source apportionment of fine particulate matter highlights the importance of joint control of coal and straw burning from the surrounding cities of Harbin. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20724292
- Volume :
- 14
- Issue :
- 15
- Database :
- Complementary Index
- Journal :
- Remote Sensing
- Publication Type :
- Academic Journal
- Accession number :
- 158523829
- Full Text :
- https://doi.org/10.3390/rs14153770