Mercury, primarily because of its existence and bioaccumulation
as methylmercury in aquatic organisms, is a concern for the health
of higher trophic level organisms, or to their consumers. This is
the major factor driving current research in mercury globally and
in environmental regulation, and is the driver for the current UNEP
Global Partnership for Mercury Transport and Fate Research (UNEP
F&T) initiative. The overall focus of the UNEP F&T report
is to assess the relative importance of different
processes/mechanisms affecting the transfer of mercury (Hg) from
emission sources to aquatic and terrestrial receptors and provide
possible source-receptor relationships. This transfer occurs
through atmospheric transport, chemical transformations and
subsequent deposition, and involves the intermittent recycling
between reservoirs that occurs prior to ultimate removal of Hg from
the atmosphere. Understanding the sources, the global Hg transport
and fate, and the impact of human activity on the biosphere,
requires improved knowledge of Hg movement and transformation in
the atmosphere. An improved understanding of Hg emission sources,
fate and transport is important if there is to be a focused and
concerted effort to set priorities and goals for Hg emission
management and reduction at the national, regional and global
levels; and to develop and implement such policies and strategies.
To achieve this, a series of coordinated scientific endeavors
focused on the estimation of sources, measurement and validation of
concentrations and processes, and modeling, coupled with
interpretation of the results within a policy framework, is likely
to be required.
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