Spatiotemporal Heterogeneity and the Key Influencing Factors of PM2.5 and PM10 in Heilongjiang, China from 2014 to 2018
Date:2025-06-02 clicks:
Impact Factor:4.614
DOI number:10.3390/ijerph191811627
Journal:International Journal of Environmental Research and Public Health
Key Words:PCA; GTWR; GWR; TWR; particulate matter; meteorological factors; NDVI
Abstract:Particulate matter (PM) degrades air quality and negatively impacts human health. The spatial–temporal heterogeneity of PM (PM2.5 and PM10) concentration in Heilongjiang Province during 2014–2018 and the key impacting factors were investigated based on principal component analysis-based ordinary least square regression (PCA-OLS), PCA-based geographically weighted regression (PCA-GWR), PCA-based temporally weighted regression (PCA-TWR), and PCA-based geographically and temporally weighted regression (PCA-GTWR). Results showed that six principal components represented the temperature, wind speed, air pressure, atmospheric pollution, humidity, and vegetation cover factor, respectively, contributing 87% of original variables. All the local models (PCA-GWR, PCA-TWR, and PCA-GTWR) were superior to the global model (PCA-OLS), and PCAGTWR has the best performance. PM had greater temporal than spatial heterogeneity due to seasonal periodicity. Air pollutants (i.e., SO2, NO2, and CO) and pressure were promoted whereas temperature, wind speed, and vegetation cover inhibited the PM concentration. The downward trend of annual PM concentration is obvious, especially after 2017, and the hot spot gradually changed from southwestern to southeastern cities. This study laid the foundation for precise local government prevention and control by addressing both excessive effect factors (i.e., meteorological factors, air pollutants, vegetation cover) and spatial-temporal heterogeneity of PM.
Co-author:Qibang Wang,Jianhui Li,Huiran Jin
First Author:Q1, Longhui Fu
Indexed by:Journal paper
Correspondence Author:Qingbin Wei*,Zhen Zhen*
Volume:19
Issue:18
Page Number:11627
ISSN No.:1660-4601
Translation or Not:no
Date of Publication:2022-01-01
Included Journals:SCI