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GLIN==> IADN Loadings Report and other IADN information available online






The Steering Committee of the Integrated Atmospheric Deposition Network
(IADN), an air network measuring toxic pollutants in the air of the
Great Lakes, would like to announce the online availability of two
documents, as well as other useful sources of recent IADN results.

The following reports are available online at
http://www.epa.gov/glnpo/monitoring/air/iadn/iadn.html:

   Our latest atmospheric loadings report, Atmospheric Deposition of
   Toxic Substances to the Great Lakes:  IADN Results Through 2000.
   The Technical Summary of Progress of the IADN, a useful and
   comprehensive document on IADN’s history and mandate, current status,
   results, and related research activities.

Those interested in an analysis of temporal trends of concentrations of
IADN pollutants may wish to consult the following publication:

Buehler, S.S. et al.  2004.  Causes of Variability in Pesticide and PCB
Concentrations in Air near the Great Lakes.  Environmental Science and
Technology 38(2):  414 -422.
(Available online via subscription)

Less technical information on IADN is also available online:

U.S. Government Performance and Results Act (GPRA) webpage on
Atmospheric Deposition of Toxic Pollutants
http://www.epa.gov/glnpo/glindicators/air/airb.html

State of the Lakes Ecosystem Conference (SOLEC) Draft Indicator Report
#117 Atmospheric Deposition of Toxic Chemicals
http://www.solecregistration.ca/en/reports/default.asp

The IADN website, which includes an online data request form
http://www.msc.ec.gc.ca/iadn/

The purpose of IADN, called for under Annex 15 of the Canada-U.S. Great
Lakes Water Quality Agreement, is to determine atmospheric loadings of
toxic contaminants to the Great Lakes.  In order to calculate
atmospheric loadings, the network measures concentrations of persistent
toxic pollutants in the air (gas phase and particulate) and
precipitation of the Great Lakes.  IADN examines differences in
atmospheric deposition among the Lakes and trends in loadings and
concentrations over time.  IADN has been in operation since 1990 under a
partnership between Environment Canada and the U.S. EPA Great Lakes
National Program Office.  Indiana University (Dr. Ron Hites) is the
current U.S. grantee for IADN sampling and analysis.

Substances measured by the network include polychlorinated biphenyls
(PCBs), polycyclic aromatic hydrocarbons (PAHs), trace metals, and
organochlorine pesticides including DDT, chlordane, aldrin, and lindane.

The loadings report includes loadings to the Great Lakes for the years
1999 and 2000, updates past loadings based on recent changes in the
loadings calculation, and is the sixth loadings report produced by the
IADN program.  Loadings are based on data from the five master stations
located in remote areas next to each of the Great Lakes.  The report
also discusses the influence of urban areas through use of data from a
satellite station at Chicago.

Questions on the loadings report may be directed to:
Dr. Pierrette Blanchard, Environment Canada
Pierrette.Blanchard@ec.gc.ca

Regards,

The IADN Steering Committee



^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Melissa Hulting
IADN Program Manager
U.S. EPA Great Lakes National Program Office (GLNPO)
77 W Jackson Blvd, Mail Code G-17J
Chicago, IL  60604
312.886.2265
fax 312.353.2018
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