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Holloway, T., Sakurai, T., Han, Z., Ehlers, S., Spak, S. N., Horowitz, L. W., . . . Amann, M. (2008). MICS-Asia II: Impact of global emissions on regional air quality in Asia. Atmospheric Environment, 42(15), 3543-3561
Open this publication in new window or tab >>MICS-Asia II: Impact of global emissions on regional air quality in Asia
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2008 (English)In: Atmospheric Environment, ISSN 1352-2310, E-ISSN 1873-2844, Vol. 42, no 15, p. 3543-3561Article in journal (Refereed) Published
Abstract [en]

This study quantifies the seasonality and geographic variability of global pollutant inflow to Asia. Asia is often looked to as a major source of intercontinental air pollution transport with rising emissions and efficient pollutant export processes. However, the degree to which foreign emissions have been imported to Asia has not been thoroughly examined. The Model Inter-Comparison Study for Asia (MICS-Asia) is an international collaboration to study air pollution transport and chemistry in Asia. Using the global atmospheric chemistry Model of Ozone and Related Tracers (MOZART v. 2.4), and comparing results with a suite of regional models participating in MICS-Asia, we find that imported O-3 contributes significantly throughout Asia. The choice of upper boundary condition is found to be particularly important for O-3, even for surface concentrations. Both North America and Europe contribute to ground-level O-3 concentrations throughout the region, though the seasonality of these two sources varies. North American contributions peak at over 10% of monthly mean O-3 during winter months in East Asia, compared to Europe's spring- and autumn-maxima (5-8%). In comparison to observed data from the Acid Deposition Monitoring Network in East Asia (EANET), MOZART concentrations for 03 generally fall within the range of the MICS models, but MOZART is unable to capture the fine spatial variability of shorter-lived species as well as the regional models. (C) 2007 Elsevier Ltd. All rights reserved.

MICS-Asia, inter-comparison, hemispheric transport, air pollution, ozone, carbon monoxide
National Category
Environmental Sciences
Research subject
urn:nbn:se:smhi:diva-878 (URN)10.1016/j.atmosenv.2007.10.022 (DOI)000256552600006 ()
Available from: 2015-04-28 Created: 2015-04-27 Last updated: 2020-05-04Bibliographically approved

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