PARENT SESSION

1L (1) - Exposure Modelling
Hall 4
1:45 PM - 3:30 PM, Wednesday, 30 April 2003
Chair: Lammel, G.¹, ¹
Co-chair: Dachs, J.², ²

(WE4/11) Atmospheric transport of -hexachlorocyclohexane: Development of a 3-D dynamical transport model covering the northern hemisphere.

Hansen, Kaj Mantzius¹, Christensen, Jesper H.¹, Brandt, Jørgen¹, Frohn, Lise M.¹, Geels, Camilla¹, ¹ National Environmental Research Institute, Roskilde, Roskilde, Denmark

ABSTRACT- The Danish Eulerian Hemispheric Model – a 3-D dynamical atmospheric transport model developed to describe the atmospheric transport of sulphur, lead, and mercury to the Arctic – is currently being extended to describe the transport of persistent organic pollutants (POPs). The model is covering the majority of the northern hemisphere and has a horizontal resolution of 150 km x 150 km and 18 vertical layers. Meteorological data from the numerical weather prediction model MM5v2 is used to drive the model. A description of the exchange processes between the land/ocean surfaces and the atmosphere is included in the model to account for the multi-hop transport of POPs. The present model version describes the atmospheric transport of -hexachlorocyclohexane (HCH), and other POPs may be included when proper data on emissions and physicochemical parameters becomes available. The model processes and the first model results are presented. The atmospheric transport of -HCH for the 1990s is well described by the model.

Key words: atmospheric transport model, persistent organic pollutants, hexachlorocyclohexane