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Impact of Climate and Land Cover Changes on Tropospheric Ozone Air Quality and Public Health in East Asia Between 1980 and 2010 : Volume 15, Issue 17 (09/09/2015)

By Fu, Y.

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Book Id: WPLBN0004023489
Format Type: PDF Article :
File Size: Pages 14
Reproduction Date: 2015

Title: Impact of Climate and Land Cover Changes on Tropospheric Ozone Air Quality and Public Health in East Asia Between 1980 and 2010 : Volume 15, Issue 17 (09/09/2015)  
Author: Fu, Y.
Volume: Vol. 15, Issue 17
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Fu, Y., & K. Ta, A. P. (2015). Impact of Climate and Land Cover Changes on Tropospheric Ozone Air Quality and Public Health in East Asia Between 1980 and 2010 : Volume 15, Issue 17 (09/09/2015). Retrieved from

Description: Earth System Science Programme and Graduate Division of Earth and Atmospheric Sciences, Faculty of Science, The Chinese University of Hong Kong, Hong Kong, China. Understanding how historical climate and land cover changes have affected tropospheric ozone in East Asia would help constrain the large uncertainties associated with future East Asian air quality projections. We perform a series of simulations using a global chemical transport model driven by assimilated meteorological data and a suite of land cover and land use data to examine the public health effects associated with changes in climate, land cover, land use, and anthropogenic emissions between the 5-year periods 1981–1985 and 2007–2011 in East Asia. We find that between these two periods land cover change alone could lead to a decrease in summertime surface ozone by up to 4 ppbv in East Asia and ~ 2000 fewer ozone-related premature deaths per year, driven mostly by enhanced dry deposition resulting from climate- and CO2-induced increase in vegetation density, which more than offsets the effect of reduced isoprene emission arising from cropland expansion. Climate change alone could lead to an increase in summertime ozone by 2–10 ppbv in most regions of East Asia and ~ 6000 more premature deaths annually, mostly attributable to warming. The combined impacts (−2 to +12 ppbv) show that while the effect of climate change is more pronounced, land cover change could offset part of the climate effect and lead to a previously unknown public health benefit. While the changes in anthropogenic emissions remain the largest contributor to deteriorating ozone air quality in East Asia over the past 30 years, we show that climate change and land cover changes could lead to a substantial modification of ozone levels, and thus should come into consideration when formulating future air quality management strategies. We also show that the sensitivity of surface ozone to land cover change is more dependent on dry deposition than on isoprene emission in most of East Asia, leading to ozone responses that are quite distinct from that in North America, where most ozone-vegetation sensitivity studies to date have been conducted.

Impact of climate and land cover changes on tropospheric ozone air quality and public health in East Asia between 1980 and 2010

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