Articles | Volume 20, issue 5
https://doi.org/10.5194/bg-20-971-2023
https://doi.org/10.5194/bg-20-971-2023
Research article
 | 
09 Mar 2023
Research article |  | 09 Mar 2023

Atmospheric deposition of reactive nitrogen to a deciduous forest in the southern Appalachian Mountains

John T. Walker, Xi Chen, Zhiyong Wu, Donna Schwede, Ryan Daly, Aleksandra Djurkovic, A. Christopher Oishi, Eric Edgerton, Jesse Bash, Jennifer Knoepp, Melissa Puchalski, John Iiames, and Chelcy F. Miniat

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Cited articles

Altieri, K. E., Hastings, M. G., Peters, A. J., and Sigman, D. M.: Molecular characterization of water soluble organic nitrogen in marine rainwater by ultra-high resolution electrospray ionization mass spectrometry, Atmos. Chem. Phys., 12, 3557–3571, https://doi.org/10.5194/acp-12-3557-2012, 2012. 
Altieri, K. E., Turpin, B. J., and Seitzinger, S. P.: Composition of dissolved organic nitrogen in continental precipitation investigated by Ultra-High Resolution FT-ICR Mass Spectrometry, Environ. Sci. Technol., 43, 6950–6955, https://doi.org/10.1021/es9007849, 2018. 
Asman, W. A. H.: Parameterization of below-cloud scavenging of highly soluble gases under convective conditions, Atmos. Environ., 29, 1359–1368, https://doi.org/10.1016/1352-2310(95)00065-7,1995. 
Bash, J. O., Walker, J. T., Katul, G. G., Jones, M. R., Nemitz, E., and Robarge, W. P.: Estimation of in-canopy ammonia sources and sinks in a fertilized Zea mays field, Environ. Sci. Technol., 44, 1683–1689, https://doi.org/10.1021/es9037269, 2010. 
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Short summary
Better estimates of atmospheric nitrogen (N) deposition are needed to accurately assess ecosystem risk and impacts from deposition of nutrients and acidity. Using measurements and modeling, we estimate total N deposition of 6.7 kg N ha−1 yr−1 at a forest site in the southern Appalachian Mountains, a region sensitive to atmospheric deposition. Reductions in deposition of reduced forms of N (ammonia and ammonium) will be needed to meet the lowest estimates of N critical loads for the region.
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