The need for a coordinated global Hg monitoring network for global and regional models validation

  • Gerald J. Keeler
  • Nicola Pirrone
  • Russel Bullock
  • Sanford Sillman


Currently, there is not a coordinated observational network for mercury (Hg) that could be used by the modelling community or for establishing recommendations for protecting human and environmental health on a global scale. Current national networks are inadequate as they lack (1) observations of all forms of Hg in the ambient air and in both wet and dry deposition; (2) long-term measurements of Hg and other air pollutants; (3) comprehensive monitoring sites in the free-troposphere; and (4) measurement sites that permit a careful investigation of inter-hemispheric transport and trends in background concentrations. Programs such as the World Meteorological Organization's Global Atmosphere Watch have made substantial efforts to establish data centers and quality control programs to enhance integration of air quality measurements from different national and regional networks, and to establish observational sites in under-sampled, remote regions around the world. Similarly, the International Global Atmospheric Chemistry project (of the International Geosphere-Biosphere Programme) has strongly endorsed the need for international exchange of calibration standards and has helped coordinate multinational field campaigns to address a variety of important issues related to global air quality. Following the lead of these programs and incorporation of a well-defined Hg monitoring component into the existing network sites would be the most expeditious and efficient approach. Close coordination of the global modelling community with the global measurement community would lead to major advances in the global models and advance our understanding of the Hg science while decreasing the uncertainties in global assessments for Hg.


Emission Inventory Marine Boundary Layer National Atmospheric Deposition Program National Atmospheric Deposition Program Atmospheric Mercury 
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Copyright information

© Springer-Verlag New York 2009

Authors and Affiliations

  • Gerald J. Keeler
    • 1
  • Nicola Pirrone
    • 2
  • Russel Bullock
    • 3
  • Sanford Sillman
    • 4
  1. 1.Department of Environmental Health SciencesUniversity of MichiganAnn ArborUSA
  2. 2.CNR-Institute for Atmospheric PollutionRomeItaly
  3. 3.NOAA, Air Resources LaboratoryUSA
  4. 4.University of MichiganDep. Atmospheric SciencesUSA

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