This research article analyzes trends in PM2.5 concentrations in five major Chinese cities between 1999-2008. The study finds that PM2.5 levels decreased overall during this period, especially in warmer seasons, but remained highest during evening hours and winter months. Additionally, PM2.5 concentrations were still above Chinese national air quality standards, particularly in northern regions during winter. Stronger government measures are needed to reduce emissions, especially in northern China during colder periods.
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TitleResearch article Trends of PM2.5 concentrations in China A l.docx
1. Title:Research article: Trends of PM2.5 concentrations in
China: A long term approachAuthors:Fontes, Tânia a, b, c, ∗
Li, Peilin a
Barros, Nelson b
Zhao, Pengjun aAffiliation:a Centre for Urban Planning and
Transport Studies, Peking University, Beijing, China
b CIAGEB - Global Change, Energy, Environment and
Bioengineering Center, University Fernando Pessoa, Porto,
Portugal
c INESC TEC – INESC Technology and Science and FEUP-
Faculty of Engineering, University of Porto, Porto,
PortugalSource:In Journal of Environmental Management 1 July
2017 196:719-732Publisher:Elsevier LtdAbstract:The fast
economic growth of China along the last two decades has
created a strong impact on the environment. The occurrence of
heavy haze pollution days is the most visible effect. Although
many researchers have studied such problem, a high number of
spatio-temporal limitations in the recent studies were identified.
From our best knowledge the long trends of PM2.5
concentrations were not fully investigated in China, in
particular the year-to-year trends and the seasonal and daily
cycles. Therefore, in this work the PM2.5 concentrations
collected from automatic monitors from five urban sites located
in megacities with different climatic zones in China were
analysed: Beijing (40°N), Chengdu (31°N), Guangzhou (23°N),
Shanghai (31°N) and Shenyang (43°N). For an inter-comparison
a meta-analysis was carried out. An evaluation conducted since
1999 demonstrates that PM2.5 concentrations have been reduced
until 2008, period which match with the occurrence of the
Olympic Games. However, a seasonal analysis highlight that
3. investment: Evidence from ChinaAuthors:Liu, Yiming a, f
Hao, Yu a, b, c, d, e, ⁎, 1
Gao, Yixuan a, gAffiliation:a Center for Energy and
Environmental Policy Research, Beijing Institute of
Technology, Beijing 100081, China
b School of Management and Economics, Beijing Institute of
Technology, Beijing 100081, China
c Sustainable Development Research Institute for Economy and
Society of Beijing, Beijing 100081, China
d Collaborative Innovation Center of Electric Vehicles in
Beijing, Beijing 100081, China
e Beijing Key Lab of Energy Economics and Environmental
Management, Beijing 100081, China
f Department of Building, School of Design and Environment,
National University of Singapore,
4 Architecture Drive, Singapore
S117566, Singapore
g Department of Natural Resources and the Environment,
University of New Hampshire,
56 College Road, Durham, NH 03824, USA
Source:In Energy Policy September 2017 108:271-
280Publisher:Elsevier LtdTopics:ENENAbstract:Fixed asset
investment (FAI) and foreign indirect investment (FDI) have
important influences on economic development and
environmental quality. Because environmental performance is
related with economic development, FAI and FDI may affect
environment indirectly through their impacts on economic
growth. In this study, the direct and indirect effects of both FAI