Modelling of Mercury in the Arctic with the Danish Eulerian Hemispheric Model J. H. Christensen, J. Brandt, L. M. Frohn, and H. Skov National Environmental Research Institute, Frederiksborgvej 399, 4000 Roskilde, Denmark
Abstract. A new 3-D mercury model has been developed within the Danish Arctic
Monitoring and Assessment Programme (AMAP). The model is based on the Danish
Eulerian Hemispheric Model, which in the original version has been used to
study the transport of SO2, SO42- and Pb into the Arctic. It
was developed for sulphur in 1990 and in 1999 also lead was included. For
the current study a chemical scheme for mercury has been included and the
model is now applied to the mercury transport problem. Some experiments with
the formulation of the mercury chemistry during the Polar Sunrise are
carried out in order to investigate the observed depletion. Some of the main
conclusions of the work described in this paper are that atmospheric
transport of mercury is a very important pathway into the Arctic and that
mercury depletion in the Arctic troposphere during the Polar Sunrise
contributes considerably to the deposition of mercury in the Arctic.
Citation: Christensen, J. H., Brandt, J., Frohn, L. M., and Skov, H.: Modelling of Mercury in the Arctic with the Danish Eulerian Hemispheric Model, Atmos. Chem. Phys., 4, 2251-2257, doi:10.5194/acp-4-2251-2004, 2004.