Science Inventory

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Wu, Z., JohnT Walker, X. Chen, C. Oishi, T. Duman, AND D. Schwede. Estimating Sources, Sinks, and Fluxes of Reactive Nitrogen and Sulfur within a Mixed Forest Canopy using Eulerian and Lagrangian Inverse Models. National Atmospheric Deposition Program Fall Science Symposium, Boulder, Colorado, November 04 - 08, 2019.

Walker, J. AND G. Beachley. Evolution of monitoring and modeling of reactive nitrogen deposition in the U.S. ENVIRONMENTAL MANAGEMENT. Springer-Verlag, New York, NY, , 0, (2019).

Wu, Z., L. Zhang, J. Walker, P. Makar, T. Nguyen, AND X. Wang. Extension of a gaseous dry deposition algorithm to oxidized volatile organic compounds. Gordon Research Conference, Newry, Maine, July 29 - August 02, 2019.

Beachley, G., C. Rogers, T. Lavery, J. Walker, AND M. Puchalski. Long-term trends in reactive N deposition in the U.S. ENVIRONMENTAL MANAGEMENT. Springer-Verlag, New York, NY, , 0, (2019).

Lichiheb, N., E. Personne, J. Walker, R. Saylor, Z. Wu, X. Chen, D. Schwede, AND C. Oishi. Modeling bi-directional fluxes of NH3 in a forest ecosystem using SURFATM-NH3 model: A study with a dataset from a deciduous montane forest in the southeastern U.S. American Meteorological Society, Phoenix,AZ, January 06 - 11, 2019.

Puchalski, M., J. Walker, G. Beachley, M. Zondlo, K. Benedict, R. Grant, B. Schichtel, C. Rogers, A. Leytem, J. Rice, K. Morris, J. Schauer, AND R. Wang. Need for Improved Monitoring of Spatial and Temporal Trends of Reduced Nitrogen. ENVIRONMENTAL MANAGEMENT. Springer-Verlag, New York, NY, , 0, (2019).

Walker, JohnT, X. Chen, D. Schwede, Z. Wu, J. Bash, R. Daly, A. Djurkovic, C. Oishi, E. Edgerton, J. Knoepp, M. Puchalski, AND C. Miniat. Nitrogen deposition budget for a southern Appalachian deciduous forest. National Atmospheric Deposition Program 2019 Fall Science Symposium, Boulder, Colorado, November 04 - 07, 2019.

Walker, J., G. Beachley, H. Amos, J. Baron, J. Bash, R. Baumgardner, M. Bell, K. Benedict, X. Chen, D. Clow, A. Cole, J. Coughlin, K. Cruz, R. Daly, S. Decina, E. Elliott, M. Fenn, L. Ganzeveld, K. Gebhart, S. Isil, B. Kerschner, B. Larson, T. Lavery, G. Lear, T. Macy, A. Mast, K. Mishoe, K. Morris, p. Padgett, R. Pouyat, M. Puchalski, H. Pye, A. Rea, M. Rhodes, C. Rogers, R. Saylor, B. Schichtel, D. Schwede, G. Sexstone, B. Sive, R. Sosa, P. Templar, T. Thompson, D. Tong, G. Wetherbee, T. Whitlow, Z. Wu, Z. Yu, AND Z. Leiming. Published Paper: Toward the improvement of total nitrogen deposition budgets in the United States. SCIENCE OF THE TOTAL ENVIRONMENT. Elsevier BV, AMSTERDAM, Netherlands, 691:1328-1352, (2019). https://doi.org/10.1016/j.scitotenv.2019.07.058

Walker, Johnt, G. Beachley, A. Helen, J. Baron, J. Bash, R. Baumgardner, M. Bell, K. Benedict, X. Chen, D. Clow, A. Cole, J. Coughlin, K. Cruz, R. Daly, S. Decina, E. Elliott, M. Fenn, L. Ganzeveld, K. Gebhart, S. Isil, B. Kerschner, B. Larson, T. Lavery, G. Lear, T. Macy, A. Mast, K. Mishoe, K. Morris, P. Padgett, R. Pouyat, M. Puchalski, H. Pye, A. Rea, M. Rhodes, C. Rogers, R. Saylor, B. Schichtel, D. Schwede, G. Sexstone, B. Sive, P. Templar, T. Thompson, D. Tong, G. Wetherbee, T. Whitlow, Z. Wu, Z. Yu, L. Zhang, AND R. Scheffe. Science needs for continued development of total nitrogen deposition budgets in the United States. U.S. Environmental Protection Agency, Office of Research and Development, National Center for Environmental Assessment, Washington, DC, EPA/600/R-18/383, 2019.

Walker, J. AND G. Beachley. Toward the improvement of total nitrogen deposition budgets in the United States. Panorama Actual de las Ciencias Atmosféricas, Mexico City, MEXICO, August 20, 2019.

Walker, Johnt, K. Mishoe, C. Rogers, Z. Wu, T. Macy, M. Puchalski, D. Schwede, K. Hutchison, R. Baumgardner, AND W. Robarge. AMoN Site Characterization Study: Phase I Field Measurements. National Atmospheric Deposition Program 2017 Fall Meeting, San Diego, CA, October 30 - November 03, 2017.

Walker, Johnt, M. Bell, D. Schwede, A. Cole, G. Beachley, G. Lear, AND Z. Wu. Assessing uncertainty in total reactive nitrogen deposition estimates for North American critical load applications. National Atmospheric Deposition Program 2018 Fall Science Symposium, Albany, New York, November 07 - 08, 2018.

Nahas, A., Johnt Walker, F. Yelverton, AND V. Aneja. Characterization of Reactive Nitrogen Emissions from Turfgrass. American Geophysical Union, Washington,DC, December 10 - 14, 2018.

Chen, X., M. Xie, M. Hays, E. Edgerton, D. Schwede, AND Johnt Walker. Characterization of organic nitrogen in aerosols at a forest site in the southern Appalachian Mountains. IAC2018, St. Louis, Missouri, September 02 - 07, 2018.

Chen, X., X. Mingjie, M. Hays, E. Edgerton, D. Schwede, AND Johnt Walker. Characterization of organic nitrogen in aerosols at a forest site in the southern Appalachian Mountains. Atmospheric Chemistry and Physics. Copernicus Publications, Katlenburg-Lindau, Germany, 18(9):6829-6846, (2018). https://doi.org/10.5194/acp-18-6829-2018

Waldo, S., J. Beaulieu, W. Barnett, AND Johnt Walker. Comparing near-shore and mid-lake eddy covariance measurements of methane and carbon dioxide fluxes. Presented at Ameriflux PI Meeting 2018, Bloomington, Indiana, October 23 - 25, 2018.

Guo, X., D. Pan, J. McSpiritt, L. Tao, Johnt Walker, R. Daly, AND M. Zondlo. Eddy Covariance-derived Ammonia Emission and Deposition in Adjacent Natural Ecosystems. American Geophysical Union, Washington,DC, December 10 - 14, 2018.

Beaulieu, J., A. Balz, M. Birchfield, J. Harrison, C. Nietch, M. Platz, W. C. SQUIER, S. Waldo, Johnt Walker, K. White, AND J. Young. Effects of an experimental water-level drawdown on methane emissions from a eutrophic reservoir. ECOSYSTEMS. Springer, New York, NY, 21(4):657-674, (2018).

Wu, Z., D. Schwede, R. Vet, Johnt Walker, M. Shaw, R. Staebler, AND L. Zhang. Evaluation and Intercomparison of Five North American Dry Deposition Algorithms at a Mixed Forest Site. Journal of Advances in Modeling Earth Systems. John Wiley & Sons, Inc., Hoboken, NJ, 10(7):1571-1586, (2018). https://doi.org/10.1029/2017MS001231

Bash, J., Johnt Walker, D. Schwede, P. Campbell, T. Spero, W. Appel, M. Shephard, K. Cady-Pereira, R. Pinder, H. Pye, B. Murphy, AND K. Fahey. Introducing the Surface Tiled Aerosol and Gaseous Exchange (STAGE) Dry Deposition Option for CMAQ V5.3. 2018 CMAS Annual Conference, Chapel Hill, NC, October 22 - 24, 2018.

Schwede, D., J. Bash, Jon Pleim, L. Ran, J. Rice, Johnt Walker, N. Watkins, M. Puchalski, AND A. Cole. MODELING PROCESSES, TRANSPORT AND DEPOSITION OF AMMONIA IN THE US. US-Canada Ammonia Workshop, Ottawa, CA, CANADA, October 10, 2018.

Guo, X., D. Pan, Johnt Walker, R. Daly, AND M. Zondlo. Measurements of Ammonia Emission and Deposition in Adjacent Natural Ecosystems. National Atmospheric Deposition Program, Albany,NY, November 05 - 08, 2018.

Waldo, S., J. Beaulieu, W. Barnett, AND Johnt Walker. Methane Emissions from a Eutrophic Reservoir: Using Non-Linear Models to Gap Fill and Assess Biophysical Drivers. American Meteorological Society Fourth Conference on Biogeosciences, Boise,ID, May 13 - 18, 2018.

Bash, J., V. Rao, I. Rumsey, Johnt Walker, P. Campbell, T. Spero, W. Appel, M. Shephard, AND K. Cady-Pereira. Runtime NH3 emission estimates using the Surface Tiled Aerosol and Gaseous Exchange (STAGE) dry deposition option in the Community Multiscale Air Quality (CMAQ) Model v5.3. 2018 AGU Fall Meeting, Washington, DC, December 10 - 14, 2018.

Waldo, S., J. Beaulieu, W. Barnett, AND Johnt Walker. Sediment Temperature Control on Methane Ebullition in a Small Eutrophic Reservoir. Presented at American Geophysical Union Fall Metting, Washington, D.C., D.C, December 10 - 14, 2018.