Office of Research and Development Publications

National Risk Management Research Laboratory (NRMRL) Research Publications

See all EPA publications for John Walker, Jr. Include records from any date Include records from any EPA source

Records 26 to 34 of 34 records from [ORD-NRMRL] published between 10/22/2012 and 10/22/2017 from author John Walker, Jr.

2014

WALKER, JR., J. T., W. P. Robarge, AND R. Austin. Modeling of ammonia dry deposition downwind of a large poultry facility. SCIENCE. American Association for the Advancement of Science (AAAS), Washington, DC, 185:161-175, (2011).

2013

Walker, Johnt. Bias in modeled bi-directional NH3 fluxes associated with temporal averaging of atmospheric NH3 concentrations. Spring meeting of the National Atmospheric Deposition Program, Madison, WI, April 22 - 25, 2013.

Novick, K., Johnt Walker, S. Chan, C. Sobek, AND J. Vose. Eddy covariance measurements in complex terrain with a new fast response, closed-path analyzer: spectral characteristics and cross-system comparisons. AGRICULTURAL AND FOREST METEOROLOGY. Elsevier Science Ltd, New York, NY, 181:17-32, (2013).

George, I., R. Black, Johnt Walker, M. Hays, D. Tabor, AND B. Gullett. Emissions of volatile organic compounds and particulate matter from small-scale peat fire. American Geophysical Union Fall Meeting, San Francisco, CA, December 09 - 13, 2013.

George, I., R. Black, Johnt Walker, M. Hays, B. Preston, D. Tabor, AND B. Gullett. Emissions of volatile organic compounds and particulate matter from small-scale peat fires. American Geophysical Union Fall Meeting, San Francisco, CA, December 09 - 13, 2013.

Pillai, P., A. Khlystov, Johnt Walker, AND V. Aneja. Observation and Analysis of Particle Nucleation at a Forest Site in Southeastern US. Atmospheric Pollution Research. Turkish National Committee for Air Pollution Research and Control, Izmir, Turkey, 4(2):72-93, (2013).

Walker, Johnt, M. Jones, J. Bash, L. Myles, T. Meyers, D. Schwede, J. Herrick, E. Nemitz, AND W. Robarge. Processes of Ammonia Air-Surface Exchange in a Fertilized Zea Mays Canopy. Biogeosciences. Copernicus Publications, Katlenburg-Lindau, Germany, 10(2):981-998, (2013).

Samy, S., J. Robinson, I. Rumsey, Johnt Walker, AND M. Hays. Speciation and Trends of Organic Nitrogen in Southeastern U.S. Fine Particulate Matter (PM2.5). JOURNAL OF GEOPHYSICAL RESEARCH: ATMOSPHERES. American Geophysical Union, Washington, DC, 118(4):1996-2006, (2013).

2012

Theobald, M. R., P. Lofstrom, J. T. WALKER, JR., H. V. Andersen, P. Pedersen, A. Vallejo, AND M. A. Sutton. An intercomparison of models used to simulate the short-range atmospheric dispersion of agricultural ammonia emissions. ENVIRONMENTAL MODELLING AND SOFTWARE. Elsevier Science Ltd, New York, NY, 37:90-102, (2012).