Natural emissions of volatile organohalogens in Arctic and
Subarctic terrestrial systems
A study of the Arctic’s role in the atmospheric organohalogen budget
During the summer of 2012, emission and consumption of volatile organohalogens from soil were investigated in Kangerlussuaq, western Greenland (66°58’ N; 50°28’ W), Narsarsuaq, southern Greenland (61°09’ N; 45°23’ W), and Abisko, northern Sweden (68°22’ N, 18°44’ E). These three locations are representative of Arctic and Subarctic environments.
Aims of the project
While the high impact of volatile organohalogens on atmospheric chemistry is generally recognized, key uncertainties still remain concerning the emission and distribution of the natural fraction of these compounds, especially regarding the fate and emissions from arctic and subarctic landmasses.
This project will address these uncertainties by investigating the natural production and consumption of volatile organohalogens in arctic and subarctic landscapes. Estimates of net emission factors and the general fate of volatile organohalogens will be assessed through field measurements and laboratory studies, combined with simple model simulations. The emission factors will be evaluated according to the IPCC global warming scenarios.
The specific aims of the proposed project are two-fold:
1) To give estimates of the net emission of naturally produced volatile organohalogens in Arctic and Subarctic landscapes;
2) To clarify the biological pathways and the environmental factors involved in the formation and degradation of organohalogens in arctic and subarctic landscapes.