Assessing
Long-Term Trend of Particulate Matter Pollution
in the Pearl River Delta Region Using Satellite Remote Sensing
Ying Li
Changqing Lin
Alexis K. H. Lau
Chenghao Liao
Yongbo Zhang
Wutao Zeng
Chengcai Li
Jimmy C. H. Fung
Tim K. T. Tse
10.1021/acs.est.5b02776.s001
https://acs.figshare.com/articles/journal_contribution/Assessing_Long_Term_Trend_of_Particulate_Matter_Pollution_in_the_Pearl_River_Delta_Region_Using_Satellite_Remote_Sensing/2125360
Serious particulate matter (PM) pollution
problems in many polluted
regions of China have been frequently reported in recent years. Long-term
exposure to ambient PM pollution is significantly associated with
adverse health effects. Characterizing the long-term trends and variation
in PM pollution is a basic requirement for evaluating long-term exposure
and for guiding future policies to reduce the effects of air pollution
on health. However, long-term, ground-based PM measurements are only
available at a few fixed stations. In this study, an algorithm is
developed and validated to estimate PM concentrations based on the
satellite atmospheric optical depth with 1 km spatial resolution.
The long-term trends of PM<sub>10</sub> concentrations in the entire
Pearl River Delta (PRD) region and different cities are quantified
and discussed. From 2001 to 2013, the PM<sub>10</sub> pollution of
the entire PRD region was dominated by a decreasing trend of −0.15
± 0.23 μg/m<sup>3</sup>·yr. This decreasing PM<sub>10</sub> trend was apparent over 75% of the PRD area, with the most
significant decreases observed in the center of the region. However,
the remaining 25%, mostly located in the outskirts of the region,
showed an increasing PM<sub>10</sub> trend. This overall decreasing
trend indicates the effectiveness of the control measures applied
in the past decade for the primary pollutants.
2015-10-06 00:00:00
PM 10 trend
1 km
control measures
PRD region
Pearl River Delta Region
Particulate Matter Pollution
ambient PM pollution
Pearl River Delta
PM pollution
PM 10 pollution
pollution problems
Satellite Remote SensingSerious
PRD area
PM 10 concentrations
estimate PM concentrations
PM measurements
health effects
air pollution
future policies