Arctic Observing Network Project - Long Term Measurements of Nitrogen Oxides at the GEOSummit Station, Greenland



Project Objectives

This project, funded by NSF(grant #1107398), is to make high quality measurements of nitrogen oxides (NOX=NO+NO2) at the GEOSummit station from summer 2012 through summer 2016. The measurements will provide important information on the concentrations of nitrogen oxides transported to the Arctic, which vary both seasonally and annually and the resulting impact on Arctic ozone levels. The project will contribute to the Arctic Observing Network (AON) and the Study of Environmental Arctic Change (SEARCH). The data will be made available to researchers for studies to improve understanding of current impacts of transported pollution on greenhouse gas levels and estimates of climate change feedbacks within the Arctic.

Pollution from fossil fuel combustion is often transported to the Arctic region from nearby continents resulting in an increase in greenhouse gases. The Arctic climate is particularly sensitive to the effects of greenhouse gases. The initial rise in temperature reduces ice cover, exposing the darker oceans below which absorb more radiation leading to further warming. Monitoring these pollutants in the Arctic is important to understand the changes that have occurred and the impact on the future climate.





GEOSummit Site

The GEOSummit station is at a high elevation (~3200 m altitude) making the site suitable for sampling in the free troposphere and away from local emissions. Measurements of nitrogen oxides both above and within the snowpack have previously been made by the group during the period 2008-2010. The instrument for this project will be installed in June 2012. Preliminary measurements will appear on this site soon.



summitcamp





Recent Measurements

The most recently processed data are shown in the following plot. Note that this plot contains preliminary data, which may change significantly when they are carefully analyzed. In addition, periods of instrument tests may be included. Scientists interested in using data from the station should contact Louisa Kramer for more information.

Shown are hourly averages of NO (green) and NO2 (blue) in pptv







Recent posters and presentations



Louisa Kramer
updated: June 2013