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Measurements of nitrogen dioxide in Greenland using Palmes diffusion tubes
T S Hansen1, M Kruse, H Nissen
1University of Southern Denmark, Department of Chemistry, Odense M. tsh@chem.sdu.dk
Journal of Environmental Monitoring : JEM
|March 17, 2001
Summary
Pollution levels in Greenland towns are comparable to Denmark. Nitrogen dioxide pollution is mainly from local car traffic, not long-range transport.
Area of Science:
- Environmental Science
- Atmospheric Chemistry
Background:
- Greenland's remote Arctic environment faces increasing development and potential pollution.
- Understanding air quality is crucial for assessing environmental and health impacts.
Purpose of the Study:
- To measure nitrogen dioxide (NO2) levels in three west Greenland towns: Uummannaq, Aasiaat, and Nuuk.
- To identify sources and patterns of NO2 pollution in the region.
Main Methods:
- Utilized Palmes diffusion tubes for passive sampling of nitrogen dioxide.
- Conducted measurements across various locations within towns, including traffic sites, residential areas, and outskirts.
Main Results:
- NO2 concentrations at heavily impacted sites in Greenland were comparable to larger Danish towns.
- Peak NO2 levels (up to 16 ppbv) were found near car traffic, with lower levels in residential (2-6 ppbv) and background areas (1-2 ppbv).
- Remote site measurements (Akia, 25 km from Nuuk) showed very low NO2 (<0.1 ppbv), suggesting limited long-range transport.
Conclusions:
- Local sources, primarily vehicle emissions, are the dominant contributors to NO2 pollution in west Greenland.
- Long-range atmospheric transport plays a minor role in NO2 levels in this region.
- The findings highlight the need for local pollution management strategies in Greenland's developing communities.