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Title:
Transpacific Transport of Pollution and its Impact on Atmospheric Composition over North America
Authors:
Pfister, G. G.; Emmons, L. K.; Edwards, D. P.; Hess, P. G.; Arellano, A. F.
Affiliation:
AA(National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States ; ), AB(National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States ; ), AC(National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States ; ), AD(National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States ; ), AE(National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80301, United States ; )
Publication:
American Geophysical Union, Fall Meeting 2007, abstract #A51E-02
Publication Date:
12/2007
Origin:
AGU
AGU Keywords:
0345 Pollution: urban and regional (0305, 0478, 4251), 0365 Troposphere: composition and chemistry, 0368 Troposphere: constituent transport and chemistry
Abstract Copyright:
(c) 2007: American Geophysical Union
Bibliographic Code:
2007AGUFM.A51E..02P

Abstract

We have analyzed the transport of pollution across the Pacific during springtime 2006 and examined how the long-range transport impacts atmospheric composition over North America. Our analysis combines simulations performed with both the chemistry transport model MOZART and the regional air quality model WRF-CHEM with a suite of observations. The observational data set includes aircraft measurements of trace gases and aerosols performed during the INTEX-B campaign (Intercontinental Chemical Transport Experiment), ground-based trace gas and aerosol measurements, and satellite observations of CO from the Measurements of Pollution in the Troposphere (MOPITT) instrument and of aerosol loading from the Moderate Resolution Imaging Spectroradiometer (MODIS). Model tracers are used to examine the contributions of different regions to pollution levels over the Pacific and to estimate the ozone production from NOx sources in Asia to ozone loadings over the Pacific and North America. The MOPITT and MODIS multi-year data series reaching back to 2000 are used to put 2006 into relation to the transpacific transport occurring in other years. The authors acknowledge the INTEX-B team for making their measurements available.
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