Articles | Volume 20, issue 5
https://doi.org/10.5194/bg-20-971-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-20-971-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
09 Mar 2023
Research article |
| 09 Mar 2023
| 09 Mar 2023
Atmospheric deposition of reactive nitrogen to a deciduous forest in the southern Appalachian Mountains
John T. Walker
CORRESPONDING AUTHOR
U.S. Environmental Protection Agency, Office of Research and Development, Durham, NC, USA
Xi Chen
U.S. Environmental Protection Agency, Office of Research and Development, Durham, NC, USA
now at: U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Durham, NC, USA
Zhiyong Wu
U.S. Environmental Protection Agency, Office of Research and Development, Durham, NC, USA
now at: RTI International, Durham, NC, USA
Donna Schwede
U.S. Environmental Protection Agency, Office of Research and Development, Durham, NC, USA
retired
Ryan Daly
U.S. Environmental Protection Agency, Office of Research and Development, Durham, NC, USA
now at: Boulder A.I.R. LLC, Boulder, CO, USA
Aleksandra Djurkovic
U.S. Environmental Protection Agency, Office of Research and Development, Durham, NC, USA
A. Christopher Oishi
U.S. Department of Agriculture, Forest Service, Southern Research Station, Coweeta Hydrologic Laboratory, Otto, NC, USA
Eric Edgerton
Atmospheric Research & Analysis, Inc., Cary, NC, USA
Jesse Bash
U.S. Environmental Protection Agency, Office of Research and Development, Durham, NC, USA
Jennifer Knoepp
U.S. Department of Agriculture, Forest Service, Southern Research Station, Coweeta Hydrologic Laboratory, Otto, NC, USA
retired
Melissa Puchalski
U.S. Environmental Protection Agency, Office of Air and Radiation, Washington, DC, USA
John Iiames
U.S. Environmental Protection Agency, Office of Research and Development, Durham, NC, USA
Chelcy F. Miniat
U.S. Department of Agriculture, Forest Service, Southern Research Station, Coweeta Hydrologic Laboratory, Otto, NC, USA
now at: U.S. Department of Agriculture, Forest Service, Albuquerque, NM, USA
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Qian Shu, Benjamin Murphy, Jonathan E. Pleim, Donna Schwede, Barron H. Henderson, Havala O.T. Pye, Keith Wyat Appel, Tanvir R. Khan, and Judith A. Perlinger
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Preprint withdrawn
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Yilin Chen, Huizhong Shen, Jennifer Kaiser, Yongtao Hu, Shannon L. Capps, Shunliu Zhao, Amir Hakami, Jhih-Shyang Shih, Gertrude K. Pavur, Matthew D. Turner, Daven K. Henze, Jaroslav Resler, Athanasios Nenes, Sergey L. Napelenok, Jesse O. Bash, Kathleen M. Fahey, Gregory R. Carmichael, Tianfeng Chai, Lieven Clarisse, Pierre-François Coheur, Martin Van Damme, and Armistead G. Russell
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Mingjie Xie, Zhenzhen Zhao, Amara L. Holder, Michael D. Hays, Xi Chen, Guofeng Shen, James J. Jetter, Wyatt M. Champion, and Qin'geng Wang
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Yiqi Zheng, Joel A. Thornton, Nga Lee Ng, Hansen Cao, Daven K. Henze, Erin E. McDuffie, Weiwei Hu, Jose L. Jimenez, Eloise A. Marais, Eric Edgerton, and Jingqiu Mao
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Short summary
Short summary
This study aims to address a challenge in biosphere–atmosphere interactions: to what extent can biogenic organic aerosol (OA) be modified through human activities? From three surface network observations, we show OA is weakly dependent on sulfate and aerosol acidity in the summer southeast US, on both long-term trends and monthly variability. The results are in strong contrast to a global model, GEOS-Chem, suggesting the need to revisit the representation of aqueous-phase secondary OA formation.
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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.
Better estimates of atmospheric nitrogen (N) deposition are needed to accurately assess...
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