Atmospheric Perspective on Toxic Metal Deposition
to Water Bodies and Water Sheds
This page finalized October 2, 2006.
Chair’s Air Pollution Seminar Series
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Thursday, October
26, 2006
10:30 a.m. - 12 Noon
Coastal Hearing Room, Second Floor
1001 I Street, Sacramento
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Webcast
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Atmospheric
Perspective on Toxic Metal Deposition
to Water Bodies and Water Sheds
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James J. Schauer, Ph.D., P.E.
Associate Professor
University of Wisconsin-Madison
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Although atmospheric deposition of toxic metals are
believed to be important contributors to the total burden of metal inputs to many water bodies and water sheds,
it is often difficult to quantify the total atmospheric deposition of these metals and their sources. Athough wet
deposition fluxes are relatively easy to measure, it is much harder to identify the sources of the depositing metals.
Dry deposition fluxes are much more difficult to quantify and therefore also present changes for source attribution.
Most efforts to link sources of depositing toxic metals seek to directly link the deposition fluxes to sources
without measurement of atmospheric concentrations. The advantages of decoupling atmospheric transport and source
apportionment from deposition velocity rates allows tools developed in the atmospheric sciences fields to better
quantity sources of deposition that can typically be obtained from a direct measurement of only deposition rates.
The atmospheric measurement and analysis tools that can help understand the sources and deposition of metals that
impact water bodies will be discussed.
To highlight the importance of understanding the atmospheric source-receptor relationships in quantifying sources
of toxic metal deposition, two recent atmospheric studies will be presented. The first study examines the emissions
of toxic metals from mobile sources, which provides important inputs to atmospheric transport models to predict
toxic metal deposition and provides insight into the speciation of metals emitted from mobile sources. The second
study exams the dynamics and sources of atmospheric mercury in LA Basin. |
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| James J. Schauer, Ph.D., P.E., is an Associate Professor in the Environmental Chemistry
and Technology Program and the Civil and Environmental Engineering Program at the University of Wisconsin-Madison,
and serves as the Director of the Water Science and Engineering Laboratory at the University of Wisconsin. He received
his Ph.D. in Environmental Engineering Science from the California Institute of Technology, his MS in Environmental
Engineering from the University of California at Berkeley and his BS degree in Chemical and Petroleum Refining
Engineering from the Colorado School of Mines. Dr. Schauer has previously worked in the chemical and petroleum
refining industry as a Chemical Process Engineer and has helped commission and start-up large chemical facilities
in Asia, Europe, North America, and Africa. Dr. Schauer currently leads an internationally recognized research
team that employs advanced chemical analysis and air pollution sampling techniques to understand the chemical composition
of source emissions and atmospheric pollutant concentrations. These methods are being used to understand the origin
of impact of air pollutants in the urban atmosphere, human health, the ecosystems, and global climate change. Dr.
Schauer has authored and co-authored more than 60 peer reviewed manuscripts in leading environmental science, environmental
engineering, and air pollution journals in the past 8 years. Prof. Schauer is the 2002 recipient of the Health
Effect Institute Rosenblith Award and the 2006 recipient of the American Association for Aerosol Research Kenneth
T. Whitby Award. Dr Schauer is honored as a Guest Professor at Peking University (formerly Beijing University)
in Beijing, China. |
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For more information on this
Seminar please contact Eileen McCauley at (916) 323-1534 or send email to: emccaule@arb.ca.gov
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For a complete listing of
the ARB Chairman's Series and the related documentation for each one of the series please check this page
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Note: for a print friendly
version of this page please click on the "Print Friendly" option at the very top of this page.
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Main Seminar Series Page
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Research
Activities
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