Articles | Volume 15, issue 2
Biogeosciences, 15, 529–550, 2018
https://doi.org/10.5194/bg-15-529-2018
Biogeosciences, 15, 529–550, 2018
https://doi.org/10.5194/bg-15-529-2018
Research article
29 Jan 2018
Research article | 29 Jan 2018

Spatial variations in snowpack chemistry, isotopic composition of NO3 and nitrogen deposition from the ice sheet margin to the coast of western Greenland

Chris J. Curtis et al.

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AMAP: AMAP Assessment 2006: Acidifying Pollutants, Arctic Haze and Acidification in the Arctic, Arctic Monitoring and Assessment Programme (AMAP), Oslo, Norway, xii + 112 pp., 2006.
Bates, D., Maechler, M., Bolker, B., and Walker, S.: Fitting Linear Mixed-Effects Models Using lme4, J. Stat. Softw., 67, 1–48, https://doi.org/10.18637/jss.v067.i01, 2015.
Berhanu, T. A., Savarino, J., Erbland, J., Vicars, W. C., Preunkert, S., Martins, J. F., and Johnson, M. S.: Isotopic effects of nitrate photochemistry in snow: a field study at Dome C, Antarctica, Atmos. Chem. Phys., 15, 11243–11256, https://doi.org/10.5194/acp-15-11243-2015, 2015.
Bergström, A. K. and Jansson, M.: Atmospheric nitrogen deposition has caused nitrogen enrichment and eutrophication of lakes in the northern hemisphere, Glob. Change Biol., 12, 635–643, 2006.
Beyn, F., Matthias, V., Aulinger, A., and Dähnke, K.: Do N-isotopes in atmospheric nitrate deposition reflect air pollution levels?, Atmos. Environ., 107, 281–288, 2015.
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Few studies have investigated the atmospheric deposition of nitrate in the Arctic or its impacts on Arctic ecosystems. We collected late-season snowpack from three regions in western Greenland from the coast to the edge of the ice sheet. We found major differences in nitrate concentrations (lower at the coast) and deposition load (higher). Nitrate in snowpack undergoes losses and isotopic enrichment which are greatest in inland areas; hence deposition impacts may be greatest at the coast.
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