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The Ammonia Workshop took place Oct 22-24, 2003, in Washington, D.C.,  in conjunction with the annual National Atmospheric Deposition Program (NADP) meeting.  This workshop was a follow-up to the 2nd International Nitrogen Conference held October 2001 in Potomac, MD, which recognized the need to improve our understanding of atmospheric ammonia .It was intended for scientists and policy-makers and addressed the state of science of ammonia/ammonium emissions, air concentrations, and atmospheric transport, transformation, and deposition. It consisted of plenary sessions with invited speakers, question-and-answer sessions, and a poster session on Wednesday evening. The presentations included here are from the plenary sessions.

Proceedings, which include abstracts from all presetners of the Annual NADP Meeting are avaliable here: (3.2 MB)






Ammonia and Air Quality
Russell R. Dickerson (e-mail) , University of Maryland

Abstract: (3 KB)           Presentation: (1.9 MB) (3.3 MB)


Effects of Ammonia Deposition
James N. Galloway (e-mail) , University of Virginia

Abstract: (2 KB)           Presentation: (1.3 MB) (2.4 MB)


Effects of Atmospheric Ammonia (NH3) on Terrestrial Vegetation
S.V. Krupa (e-mail) , University of Minnesota

Abstract: (5 KB)           Presentation: (1.3 MB) (10.7 MB)


Managing Ammonia Emissions Cost Effectively
J. Webb (e-mail) , ADAS Research; U. Dämmgen, Federal Agricultural Research

Abstract: (5 KB)           Presentation: (0.6 MB) (4.1 MB)


Managing Ammonia in the U.S.
J.L. Hatfield (e-mail) and J. H. Prueger, U.S. Department of Agriculture

Abstract: (4 KB)           Presentation: (1.4 MB) (11.4 MB)


Are We There Yet? Future Paths from the Past
Gary L. Saunders (e-mail) , North Carolina Department of Environment and Natural Resources

Abstract: (4 KB)           Presentation: (0.9 MB) (14.3 MB)


Regulating Ammonia in Clean Air Act State Implementation Plans -
Do We Know Enough to Proceed?
Dave Mitchell (e-mail) , San Joaquin Valley Air Pollution Control District.

Abstract: (4 KB)           Presentation: (1.2 MB) (2.2 MB)


Measuring Ammonia Emissions from Agricultural Sources: Technical Possibilities, Applicability in Situ, Benefits and Drawbacks
Gert-Jan Monteny and Julio Mosquera (e-mail), IMAG Wageningen University and Research Centre

Abstract: (5 KB)           Presentation: (0.7 MB) (1.0 MB)


Techniques for Measuring Ammonia Emissions from Land Applications of Manure and Fertilizer
T. H. Misselbrook (e-mail) , Institute of Grassland and Environmental Research; F. A. Nicholson, ADAS Gleadthorpe

Abstract: (4 KB)           Presentation: (1.0 MB) (1.9 MB)


Urban Ammonia Source Characterization Using Infrared Quantum Cascade Laser Spectroscopy
Mark S. Zahniser (e-mail) , Aerodyne Research, Inc.

Abstract: (3 KB)           Presentation: (11.4 MB) (14.0 MB)

Videos:   feedlot.mov (127 MB)     traffic.mov (9.7 MB)
Quantifying Ammonia Concentrations and Exchange Fluxes: Process Interactions and Regional Generalization
M.A. Sutton (e-mail), Y. S. Tang, C. Milford, T. Dore, E. Nemitz, M. R. Theobald, U. Dragosits, and D. Fowler, CEH, Edinburgh, UK; A. van Pul, RIVM, Bilthoven, NL; J.W. Erisman, ECN, Petten, NL

Abstract: (4 KB)           Presentation: (1.9 MB)


Measurement of Ammonia Concentrations and Fluxes: Recent Examples Using Denuder and Chemiluminescence Technologies
John Walker (e-mail) , U.S. Environmental Protection Agency

Abstract: (3 KB)           Presentation: (1.3 MB) (5.1 MB)


Application of Micrometeorological Methods for Determining Fluxes of Nitrogen Compounds
Tilden Meyers (e-mail) , National Oceanic and Atmospheric Administration

Abstract: (4 KB)           Presentation: (0.9 MB) (6.3 MB)


Modeling Atmospheric Transport and Deposition of Ammonia
Willem A. H. Asman (e-mail) , Danish Institute of Agricultural Sciences (DIAS)

Abstract: (2 KB)           Presentation: (5.2 MB) (7.7 MB)


Air Quality Modeling of Ammonia: A Regional Modeling Perspective
Robin L. Dennis (e-mail) , U.S. Environmental Protection Agency/NOAA Atmospheric Modeling Division

Abstract: (3 KB)           Presentation: (3.0 MB) (2.0 MB)


Measurement Techniques and Models for Ammonia Emissions At the Farm Level
Lowry A. Harper, Ph.D., P. E. (e-mail), J. Phil Campbell Natural Resources Research Center, U.S. Department of Agriculture

Abstract: (3 KB)           Presentation: (0.9 MB) (56.9 MB)


The Role of Ammonia Measurements in National Routine Ambient Air Monitoring Networks
Richard D. Scheffe (e-mail), U.S. Environmental Protection Agency.

Abstract: (3 KB)           Presentation: (1.0 MB) (1.4 MB)


Adding Ammonia/um Measurements to Routine Monitoring Networks?
Richard Poirot (e-mail) , Vermont Dept. of Environmental Conservation

Abstract: (3 KB)           Presentation: (1.6 MB) (3.8 MB)


Deposition Monitoring Networks: What Monitoring Site Density Is Required to Give Reasonable Estimates of ammonium?
Jan Willem Erisman (e-mail) , and Arjan Hensen, Energy Research Centre of the Netherlands;
Mark Sutton, CEH, Edinburgh, UK;
Addo van Pul,RIVM, Bilthoven, NL

Abstract: (3 KB)           Presentation: (26.4 MB)


Monitoring Chemical Climate Change in America - The Case for Ammonia
Van Bowersox (e-mail) , Christopher Lehmann, and Bob Larson,Illinois State Water Survey

Abstract: (4 KB)           Presentation: (6.5 MB) (7.2 MB)


Perspectives in Designing and Operating A Regional Ammonia Monitoring Network
Gary G. Lear (e-mail) , U.S. Environmental Protection Agency

Abstract: (3 KB)           Presentation: (1.4 MB)


A New Gas-Particle Ion Chromatographic System for the Continuous Monitoring of Soluble Gases and Ionic Constituents of Particulate Matter
Rida Al-Horr (e-mail) , Doublas W. Later, and Robert J. Joyce, Dionex Corporation

Poster Abstract: (3 KB)

Environmental Technology Verification of Ammonia Monitors at Two Animal Feeding Operations
Kenneth Cowen (e-mail) , Ann-Louise Sumner, Amy Dindal, and Karen Riggs, Battelle; Richard Pfeifer, Kenwood Scroggins, and Jerry Hatfield,U.S. Department of Agriculture; Robert Fuerst, U.S. Environmental Protection Agency

Poster Abstract: (3 KB)

Daily Nitrate and Ammonium Concentration Models for the Chesapeake Bay Watershed
Jeffrey W. Grimm and James A. Lynch (e-mail), The Pennsylvania State University

Poster Abstract: (8 KB)

Trends in Ammonium Concentrations in Relation to Local-Scale Agriculture and Regional Sulfur DIoxide Emissions
Victorial R. Kelly (e-mail) , Gary M. Lovett, Kathleen C. Weathers, and Gene E. Likens, Institute of Ecosystem Studies

Poster Abstract: (3 KB)

Ambient Ammonia Concentrations: A Data Review
Donna Kenski (e-mail) and Michael Korber, Lake michigan Air Directors Consortium; Purnendu Dasgupta, Texas Tech University

Poster Abstract: (3 KB)

Field Study: Intercomparison of Two Continuous Ammonia Monitors
Donna Kenski (e-mail) , Lake Michigan Air Directors Consortium; Michael Pushkarsky, Michael E. Webber, and C. Kumar N. Pate, Pranalytica, Inc.; Purnendu Dasgupta, Texas Tech University

Poster Abstract: (5 KB)

A Field Intercomparison of Eight Ammonia Measurement Techniques
Winston T. Luke (e-mail) , National Oceanic Atmospheric Administration; Jack Meisinger and Charlotte schomburg, U.S. Department of Agriculture; Joseph Scudlark, University of Delaware; Ronald L. Siefert, University of Maryland; Randolph K. Larsen, St. Mary's College of Maryland; Irvin K. Heard, Howard University

Poster Abstract: (5 KB)



The Utilization of Ion Mobility Spectrometry and Annular Denuder Techniques to Explore the Dry Deposition of Ammonia in Costal Ecosystems
LaToya Myles (e-mail) , National Oceanic Atmospheric Administration, Florida A& M University; Larry Robinson, Florida A & M University; Tilden P. Meyers, National Oceanic Atmospheric Administration
Poster Abstract: (3 KB)

Ammonium Wet Deposition in Eastern North America from 1980 to 1999
Chul-Un Ro (e-mail) and Robert Vet, Environment Canada

Poster Abstract: (3 KB)

Atmospheric Nitrogen Inputs to the Delaware Inland Bays: The Importance of Ammonia(um)
J. R. Sculdark (e-mail) , K.B.Savidge, and W.J. Ullman, University of Delaware
Poster Abstract: (5 KB)

Ammonia Measurements at and Iowa Swine Farm Singe Infared Quantum Cascade Laser Absorption Spectroscopy
Joanne H. Shorter (e-mail) , David D. Nelson, J. Barry McManus, and Mark S. Zahniser, Aerodyne Research, Inc.
Poster Abstract: (3 KB)

Characterization of Atmospheric Ammonia Plumes from Commercial Chicken Houses on the Delmarva Peninsula
Ronald L. Siefert (e-mail) and Kirsten A. Simonsen, University of Maryland; Joseph R. Scudlark and Karen B. Savidge, University of Delaware; Amelia G. Potter, University of Maryland Eastern Shore.

Poster Abstract: (4 KB)

Measurements of Ammonia and Related Species at IL11 (Bondville)
Clyde Sweet (e-mail) , David Gay, Allen Williams, and Michael Caughey, Illinois State Water Survey

Poster Abstract: (3 KB)

Early Results from a Study of Ammonium Ion Deposition in the Shenandoah Valley of Virginia
Wyane S. Teel (e-mail) , James Madison University

Poster Abstract: (2 KB)

Evaluating Ammonia Abatement Measures with the Use of Measurements and Models
Addo van Pul (e-mail) and Hans van Jaarsveld, RIVM/National Environmental Assessment Agency

Poster Abstract: (4 KB)

Population Extinction of a Checkerspot Butterfly Driven by Vehicular Ammonia Emissions
Stuart B. Weiss (e-mail) , Creekside Center for Earth Observations

Poster Abstract: (3 KB)