Abstract:
:In China, fine particulate matter (PM2.5) and ground-level ozone (O3) are anticipated to continuously affect large populations in the coming decades. Simulations of the levels of these pollutants largely depend on emissions inputs, which are highly uncertain both in magnitude and spatial distribution. Our goal was to explore sensitivities of projected changes in PM2.5- and O3-related short-term health impacts in mainland China to emissions and other model inputs. We simulated winter PM2.5 and summer O3 concentrations using the Weather Research and Forecasting model coupled with Chemistry (WRF-Chem) for both 2008 and 2050. We used three emission inventories in 2008 and four emissions scenarios in 2050. The resulting air pollutant concentrations were combined with eight population projections and three concentration-response functions (CRFs) to estimate future PM2.5- and O3-related health impacts including total, cardiovascular, and respiratory mortalities in mainland China. Multivariate analysis of variance was used to apportion the uncertainty due to different model parameters. Combinations of different parameters produced a wide range of national PM2.5- and O3-related mortalities. CRFs and present emissions each contribute 38%-56% and 20%-28% of the total sum of squares for PM2.5-related mortalities. Future emissions are the largest source of uncertainty in O3-related mortality estimates, contributing 24%-48% of total sum of squares. Our results suggest that conducting more epidemiological studies and constraining the present day emissions are essential for projecting future air pollutant-related health impacts in mainland China.
journal_name
Environ Intjournal_title
Environment internationalauthors
Zhong M,Chen F,Saikawa Edoi
10.1016/j.envint.2018.12.002subject
Has Abstractpub_date
2019-02-01 00:00:00pages
256-264eissn
0160-4120issn
1873-6750pii
S0160-4120(18)31154-1journal_volume
123pub_type
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