Xie, M., X. Chen, M. Hays, AND A. Holder. Composition and light absorption of N-containing aromatic compounds in organic aerosols from laboratory biomass burning. Atmospheric Chemistry and Physics. Copernicus Publications, Katlenburg-Lindau, Germany, 19(5):2899-2915, (2019). https://doi.org/10.5194/acp-19-2899-2019

Xie, M., X. Chen, A. Holder, M. Hays, M. Lewandowski, J. Offenberg, Tad Kleindienst, M. Jaoui, AND M. Hannigan. Light Absorption of Organic Carbon and its Sources at Southeastern U.S. Locations in Summer. ENVIRONMENTAL POLLUTION. Elsevier Science Ltd, New York, NY, 244:38-46, (2018). https://doi.org/10.1016/j.envpol.2018.09.125

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.

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

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., Johnt Walker, AND Chris Geron. Chromatography related performance of the Monitor for Aerosols and Gases in Ambient Air (MARGA): laboratory and field based evaluation. Atmospheric Measurement Techniques. Copernicus Publications, Katlenburg-Lindau, Germany, 10:3893-3908, (2017). https://doi.org/10.5194/amt-10-3893-2017

Wu, Z., D. Tomer, Johnt Walker, X. Chen, C. Oishi, D. Schwede, AND J. Iiames. Estimation of in-canopy flux distributions of reactive nitrogen and sulfur within a mixed hardwood forest in southern Appalachia. American Geophysical Union, New Orleans, LA, December 11 - 15, 2017.

Chen, X. AND Johnt Walker. Laboratory and field based evaluation of chromatography related performance of the Monitor for AeRosols and Gases in ambient Air (MARGA). 2017 AAAR, Raleigh, North Carolina, October 16 - 20, 2017.

Chen, X. AND Johnt Walker. Laboratory and field based evaluations of chromatography related performance of the Monitor for AeRosols and GAses in ambient Air (MARGA). AAAR 2017, Raleigh, NC, October 16 - 20, 2017.

Xie, M., X. Chen, M. Hays, M. Lewandowski, J. Offenberg, Tad Kleindienst, AND A. Holder. Light absorption of secondary organic aerosol: Composition and contribution of nitro-aromatic compounds. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 51(20):11607-11616, (2017).

Walker, Johnt, X. Chen, M. Xie, M. Hays, E. Edgerton, AND D. Schwede. Organic nitrogen in aerosols at a forest site in southern Appalachia. National Atmospheric Deposition Program Fall Meeting, San Diego, CA, October 30 - November 03, 2017.

Walker, Johnt, X. Chen, D. Schwede, R. Daly, A. Djurkovic, D. Kirchgessner, C. Oishi, AND M. Puchalski. Investigation of ammonia air-surface exchange processes in a deciduous montane forest in the southeastern U.S. Presented at National Atmospheric Deposition Program Fall Meeting, Santa Fe, New Mexico, October 31 - November 04, 2016.

Chen, X., Johnt Walker, AND Chris Geron. Laboratory and field based evaluation of chromatography related performance of the Monitor for Aerosols and Gases in Ambient Air (MARGA). Presented at National Atmospheric Deposition Program Fall Meeting, Santa Fe, New Mexico, October 31 - November 04, 2016.

Li, Y., B. Schichtel, Johnt Walker, D. Schwede, X. Chen, C. Lehmann, M. Puchalski, D. Gay, AND J. Collett, Jr. The Increasing Importance of Deposition of Reduced Nitrogen in the United States. PNAS (PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES). National Academy of Sciences, WASHINGTON, DC, 113(21):5874-5879, (2016).