Kristi Gebhart
Research Physical Scientist
Office: CIRA, Rm 102
Phone: 970-491-3684
Fax: 970-491-8598
Email:
Mailing Address:
Kristi Gebhart
National Park Service, Air Resources Division
Cooperative Institute for Research in the Atmosphere
Colorado State University
1375 Campus Delivery
Fort Collins, CO 80523-1375
Selected Publications
  • Connell, B. H., Gebhart, K. A., 2012: Golden words from elementary kids: Can I show you my observation!, 21st Symposium on Education/AMS.January 22-26, 2012, New Orleans, LA
  • Rivera-Rivera, N. I., Fitzgerald, R. M., Gebhart, K. A., Gill, T. E., Hand, J. L., Novlan, D. J., 2009: Analysis of air transport patterns bringing dust storms to El Paso, Texas, American Meteorological Society 89th Annual Conference.January 10-15, 2009, Phoenix, AZ
  • Gebhart, K. A., Barna, M. G., Malm, W. C., Rodriguez, M. A., Schichtel, B. A., 2009: Comparison of MM5 winds to Estes Park profiler and MM5 Hysplit back trajectories for source attribution, Ad-Hoc Meteorological Modeling Group Meeting.June 25-26, 2009, National Center for Atmospheric Research, Boulder, CO
  • Rodriguez, M. A., Barna, M. G., Gebhart, K. A., Hand, J. L., 2009: Regional air quality simulation of the Rocky Mountain Atmospheric Nitrogen and Sulfur study (RoMANS): Model diagnosis using integrated process analysis, International Aerosol Modeling Algorithms (IAMA) Conference.December, Davis, CA
  • Malm, W. C., Barna, M. G., Beem, K. B., Carrico, C. M., Collett, J. L. Jr., Day, D. E., Gebhart, K. A., Hand, J. L., Kreidenweis, S. M., Lee, Taehyoung (T.), Levin, E. J. T., McDade, C. E., McMeeking, G. R., Molenar, J. V., Raja, S., Rodriguez, M. A., Schichtel, B. A., Schwandner, F. M., Sullivan, A. P., Taylor, C., 2009: RoMANS: Rocky Mountain Atmospheric Nitrogen and Sulfur Study Report, .,
  • Rivera-Rivera, N. I., Bleiweiss, M. P., Fitzgerald, R. M., Gebhart, K. A., Gill, T. E., Hand, J. L., 2009: Wind modeling of Chihuahuan Desert dust outbreaks , Atmospheric Environment, vol. 43, 347-354
  • Barna, M. G., Gebhart, K. A., Malm, W. C., Rodriguez, M. A., Schichtel, B. A., 2008: Predicting total nitrogen deposition at national parks, The Air & Waste Management Association Visibility Specialty Conference.April 28-May 2, 2008, Moab, UT
  • Gebhart, K. A., Barna, M. G., Carrico, C. M., Collett, J. L. Jr., Hand, J. L., Lee, Taehyoung (T.), Malm, W. C., Rodriguez, M. A., Schichtel, B. A., Sullivan, A. P., 2008: Preliminary back trajectory-based source assessments for airborne particulate matter and deposited ions at Rocky Mountain National Park, CO, Air and Waste Management Association Specialty Conference on Aerosol and Atmospheric Optics: Visual Air Quality and Radiation.April 28-May 2, 2008, Moab, UT
  • Rodriguez, M. A., Barna, M. G., Gebhart, K. A., Malm, W. C., Schichtel, B. A., 2008: Regional air quality model simulation of the Rocky Mountain Atmospheric Nitrogen and Sulfur study: Preliminary results and analysis, Air & Waste Management Association Visibility Specialty Conference.April 28-May 2, 2008, Moab, UT
  • Schichtel, B. A., Barna, M. G., Beem, K. B., Carrico, C. M., Collett, J. L. Jr., Day, D. E., Gebhart, K. A., Hand, J. L., Kreidenweis, S. M., Lee, Taehyoung (T.), Mack, L., Malm, W. C., McMeeking, G. R., Raja, S., Rodriguez, M. A., Schwandner, F. M., Sullivan, A. P., Taylor, C., 2008: Rocky Mountain Atmospheric Nitrogen and Sulfur study (RoMANS): Current results and status, Colorado Air Quality Control Commission Meeting.October 17, 2008, Denver, CO
  • Barna, M. G., Gebhart, K. A., Malm, W. C., Rodriguez, M. A., Schichtel, B. A., 2008: Simulating nitrogen tracers from regional sources for RoMANS, The Air & Waste Management Association Visibility Specialty Conference.April 28-May 2, 2008, Moab, UT
  • Malm, W. C., Barna, M. G., Carrico, C. M., Collett, J. L. Jr., Gebhart, K. A., Schichtel, B. A., 2008: Source apportionment of sulfur and nitrogen species at Rocky Mountain National Park using modeled conservative tracer releases and tracers of opportunity, American Geophysical Union, Fall Meeting.December 15-19, 2008, San Francisco, CA
  • Schichtel, B. A., Barna, M. G., Collett, J. L. Jr., Gebhart, K. A., Kreidenweis, S. M., Malm, W. C., 2008: Source apportionment of sulfur and nitrogen species at Rocky Mountain National Park using modeled conservative tracer releases and tracers of opportunity, American Geophysical Union Fall 2008 Meeting.December 15-19, 2008, San Francisco, CA
  • Malm, W. C., Barna, M. G., Carrico, C. M., Collett, J. L. Jr., Gebhart, K. A., Schichtel, B. A., 2008: Source apportionment of sulfur and nitrogen species at Rocky Mountain National Park using modeled conservative tracer releases and tracers of opportunity , Air & Waste Management Association Visibility Specialty Conference.April 28-May 2, 2008, Moab, UT
  • Malm, W. C., Barna, M. G., Collett, J. L. Jr., Gebhart, K. A., Kreidenweis, S. M., Schichtel, B. A., 2008: Source apportionment of sulfur and nitrogen species at Rocky Mountain National Park using modeled conservative tracer releases and tracers of opportunity , National Atmospheric Deposition Program Annual Meeting.October 14-16, 2008, Madison, WI
  • Hand, J. L., Beem, K. B., Carrico, C. M., Collett, J. L. Jr., Day, D. E., Gebhart, K. A., Kreidenweis, S. M., Lee, Taehyoung (T.), Malm, W. C., McMeeking, G. R., Raja, S., Schwandner, F. M., Sullivan, A. P., Taylor, C., 2008: Spatial patterns in wet deposition during the 2006 Rocky Mountain Atmospheric Nitrogen and Sulfur Study (RoMANS), Air and Waste Management Association Specialty Conference on Aerosol and Atmospheric Optics: Visual Air Quality and Radiation.April 28-May 2, 2008, Moab, UT
  • Rivera-Rivera, N. I., Bleiweiss, M. P., Fitzgerald, R. M., Gebhart, K. A., Gill, T. E., Hand, J. L., 2008: Wind modeling of Chihuahuan Desert dust outbreaks, Air & Waste Management Association Visibility Specialty Conference.April 28-May 2, 2008, Moab, UT
  • Carrico, C. M., Barna, M. G., Beem, K. B., Collett, J. L. Jr., Day, D. E., Gebhart, K. A., Gorin, C. A., Hand, J. L., Kreidenweis, S. M., Lee, Taehyoung (T.), Malm, W. C., McMeeking, G. R., Raja, S., Rodriguez, M. A., Schichtel, B. A., Sullivan, A. P., 2007: Air quality observations during the 2006 Rocky Mountain Atmospheric Nitrogen and Sulfur Study (RoMANS), The Rocky Mountain States Section Air and Waste Management Conference.May 17, 2007, Golden, CO
  • Malm, W. C., Barna, M. G., Carrico, C. M., Collett, J. L. Jr., Day, D. E., Gebhart, K. A., Gorin, C. A., Kreidenweis, S. M., Lee, Taehyoung (T.), Raja, S., Schichtel, B. A., Schwandner, F. M., Sullivan, A. P., 2007: An overview of the Rocky Mountain Atmospheric Nitrogen and Sulfur Study (RoMANS), Air & Waste Management Association 100th Annual Meeting.June 26-29, 2007, Pittsburgh, PA
  • Carrico, C. M., Collett, J. L. Jr., Day, D. E., DeMott, P., Gebhart, K. A., Hand, J. L., Holden, A. S., Kreidenweis, S. M., Lee, Taehyoung (T.), Malm, W. C., McMeeking, G. R., Petters, M. D., Prenni, A. J., Schichtel, B. A., Sullivan, A. P., 2007: Investigation of the properties of smoke from wildland fires: The relationship to visual impacts of smoke, The International Association of Wildland Fires Human Dimensions Conference.October 23-25, 2007, Fort Collins, CO
  • Carrico, C. M., Barna, M. G., Beem, K. B., Collett, J. L. Jr., Day, D. E., Gebhart, K. A., Hand, J. L., Kreidenweis, S. M., Lee, Taehyoung (T.), Malm, W. C., McMeeking, G. R., Raja, S., Rodriguez, M. A., Schichtel, B. A., Schwandner, F. M., Sullivan, A. P., Taylor, C., 2007: The Rocky Mountain Atmospheric Nitrogen and Sulfur (RoMANS) Study of 2006, The Improve Newsletter, vol. ,
  • Schichtel, B. A., Barna, M. G., Gebhart, K. A., Knipping, E. M., Malm, W. C., 2006: A hybrid source apportionment model integrating measured data and air quality model results, Journal of Geophysical Research, vol. 111,
  • Schichtel, B. A., Barna, M. G., Gebhart, K. A., Malm, W. C., 2006: Association of airmass transport patterns and particulate sulfur concentrations at Big Bend National Park, Texas, Atmospheric Environment, vol. 40, 992-1006
  • Collett, J. L. Jr., Carrico, C. M., Day, D. E., Gebhart, K. A., Hand, J. L., Kreidenweis, S. M., Lee, Taehyoung (T.), Malm, W. C., Raja, S., Schichtel, B. A., Xiao-Ying, Y., 2006: Findings from the 2005 Rocky Mountain National Park Pilot Study, .,
  • Schichtel, B. A., Barna, M. G., Gebhart, K. A., Rodriguez, M. A., 2006: Integrating air quality data and modeling results to refine source appportionment estimates (poster), CIRA Science Symposium.May 16-17, 2006, Fort Collins, CO
  • Barna, M. G., Gebhart, K. A., Malm, W. C., Schichtel, B. A., 2006: Modeling regional sulfate during the BRAVO study: Part 1. Base emissions simulation and performance evaluation, Atmospheric Environment, vol. 40, 2436-2448
  • Barna, M. G., Gebhart, K. A., Malm, W. C., Schichtel, B. A., 2006: Modeling regional sulfate during the BRAVO study: Part 2. Emission sensitivity simulations and source apportionment, Atmospheric Environment, vol. 40, 2423-2435
  • Collett, J. L. Jr., Carrico, C. M., Day, D. E., Gebhart, K. A., Hand, J. L., Kreidenweis, S. M., Lee, Taehyoung (T.), Malm, W. C., Raja, S., Schichtel, B. A., Xiao-Ying, Y., 2006: Preliminary report of findings from the 2005 Rocky Mountain National Park Pilot Study, .,
  • Gebhart, K. A., Barna, M. G., Malm, W. C., Schichtel, B. A., 2006: Qualitative back-trajectory apportionment of sources of particulate sulfate at Big Bend National Park, TX, Atmospheric Environment, vol. 40, 2823-2834
  • Gebhart, K. A., Barna, M. G., Malm, W. C., Schichtel, B. A., 2006: Quantitative back-trajectory apportionment of sources of particulate sulfate at Big Bend National Park, TX, Atmospheric Environment, vol. 40, 2823-2834
  • Rodriguez, M. A., Barna, M. G., Gebhart, K. A., Schichtel, B. A., 2006: Regional modeling using CAMx: Evaluation of the air quality in the western national parks, CIRA Science Symposium.May 16-17, 2006, Fort Collins, CO
  • Barna, M. G., Gebhart, K. A., Rodriguez, M. A., Schichtel, B. A., 2006: Simulating sulfur and nitrogen deposition at western national parks, 99th Air & Waste Management Association Annual Conference.June 20-23, 2006, New Orleans, LA
  • Green, M. C., Eatough, D., Farber, R., Gebhart, K. A., Iyer, H. K., Lien, N., Molenar, J. V., 2005: Assessing changes in grand canyon haze when a regional point source reduces emissions, Journal of the Air and Waste Mangement Association (submitted)
  • Gebhart, K. A., 2005: Background meteorology and climatology, Meeting of Scientists Interested in the Rocky Mountain Naitonal Park Study: Fate and Origins of Nitrogen and Sulfur.March 30, 2005, Fort Collins, CO
  • Gebhart, K. A., Barna, M. G., Schichtel, B. A., 2005: Directional biases in back trajectories caused by model and input data, Journal of the Air & Waste Management Association, vol. 55, 1649-1662
  • Barna, M. G., Gebhart, K. A., Rodriguez, M. A., Schichtel, B. A., 2005: Evaluating the linearity of sulfate formation in response to change in sulfur dioxide emissions within a regional air quality model, NOAA/EPA Golden Jubilee Symposium on Air Qualtiy Modeling and Its Applications.2005, Durham, NC
  • Schichtel, B. A., Barna, M. G., Gebhart, K. A., Malm, W. C., 2005: Evaluation of a Eulerian and Lagrangian air quality model using perfluorocarbon tracers released in Texas for the BRAVO haze study, Atmoospheric Environment, vol. 39, 7044-7062
  • Gebhart, K. A., 2005: Plans for air quality modeling for the Rocky Mountain special study, Meeting of Scientists Interested in the Rocky Mountain Naitonal Park Study: Fate and Origins of Nitrogen and Sulfur.April 25, 2005, Denver, CO
  • Gebhart, K. A., 2005: Plans for meteorological modeling, Meeting of Scientists Interested in the Rocky Mountain Naitonal Park Study: Fate and Origins of Nitrogen and Sulfur.March 30, 2005, Fort Collins, CO
  • Schichtel, B. A., Barna, M. G., Gebhart, K. A., Knipping, E. M., Malm, W. C., Pitchford, M. L., Tombach, I. H., 2005: Reconciliation and interpretation of Big Bend National Park particulate sulfur source apportionment: Results from the Big Bend Regional Aerosol and Visibility Observational Study: Part I, Journal of the Air & Waste Management Association, vol. 55, 1709-1725
  • Pitchford, M. L., Barna, M. G., Gebhart, K. A., Knipping, E. M., Malm, W. C., Schichtel, B. A., Tombach, I. H., 2005: Reconciliation and interpretation of the Big Bend National Park light extinction source apportionment: Results from the Big Bend Regional Aerosol and Visibility Observational study: Part II, Journal of the Air & Waste Management Association, vol. 55, 1726-1732
  • Gebhart, K. A., Ashbaugh, L. L., Malm, W. C., 2005: Spatial, temporal, and interspecies patterns in fine particulate matter in Texas, Journal of the Air & Waste Management Association, vol. 55, 1636-1648
  • Green, M. C., Eatough, D., Farber, R., Gebhart, K. A., Iyer, H. K., Lien, N., Molenar, J. V., 2005: The effects of scrubber installation at the Navajo generating station on particulate sulfur and visibility levels in the Grand Canyon, Journal of the Air & Waste Management Asssociation, vol. 55, 1675-1682
  • Farber, R., Gebhart, K. A., Green, M. C., Iyer, H. K., Lien, N., Molenar, J. V., 2004: Assessing changes in Grand Canyon haze when a regional point source reduces emissions, Air and Waste Management Association Specialty Conference.October 25-29, 2004, Ashville, NC
  • Gebhart, K. A., 2004: Big Bend Regional Aerosol and Visibility (BRAVO) study, Presented to the National Park Service Air Resources Division staff.2004, Lakewood, CO
  • Pitchford, M. L., Barna, M. G., Gebhart, K. A., Green, M. C., Knipping, E. M., Kumar, N., Malm, W. C., Pun, B., Schichtel, B. A., Seigneur, C., Tombach, I. H., 2004: Big Bend Regional Aerosol and Visibility Observational (BRAVO) Study: Official Report
  • Gebhart, K. A., 2004: Big Bend Regional Visibility Observational (BRAVO) study, Presented to Committee on Envrionment and Natural Resources (CENR) Air Quality Research Subcommittee (AQRS ) Meeting.2004, Washington, D.C.
  • Schichtel, B. A., Barna, M. G., Day, D. E., Gebhart, K. A., Kreidenweis, S. M., Malm, W. C., 2004: Big Bend regional aerosol and visibility observational (BRAVO) study results: Air quality data and source attribution analyses results from the National Park Service/Cooperative Institute for Research in the Atmosphere
  • Pitchford, M. L., Barna, M. G., Gebhart, K. A., Knipping, E. M., Malm, W. C., Schichtel, B. A., Tombach, I. H., 2004: Causes of haze at Big Bend National Park: Results of the BRAVO study and more, Air and Waste Management Association Specialty Conference.October 25-29, 2004, Ashville, NC
  • Husar, R. B., Gebhart, K. A., Hoijarvi, K., Kayin, S., Malm, W. C., Poirot, R. L., Schichtel, B. A., 2004: Combineed Aerosol Trajectory Tool, CATT: Status report on tools development and use, Air and Waste Management Association Specialty Conference.October 25-29, 2004, Ashville, NC
  • Gebhart, K. A., Barna, M. G., Schichtel, B. A., 2004: Directional biases in back-trajectories due to model and input data, Air and Waste Management Association Specialty Conference.October 25-29, 2004, Ashville, NC
  • Barna, M. G., Gebhart, K. A., Malm, W. C., Schichtel, B. A., 2004: Evaluation of REMSAD-BRAVO simulation using tracer data and synthesized modeling, Particulate Matter Model Performance Workshop.2004, Research Triangle Park, NC
  • Gebhart, K. A., 2004: Hybrid trajectory/grid models applied to BRAVO study data, Lake Michigan Air Directors Consortium (LADCO) Meeting on Trajectories and Source Apportionment.2004, Des Plaines, IL
  • Gebhart, K. A., 2004: Introduction to visibility science, Bureau of Land Management (BLM) National Interagency Fire Center (NIFC) Training Course RX410, Smoke Management Techniques.2004, Boise, ID
  • Schichtel, B. A., Barna, M. G., Gebhart, K. A., Malm, W. C., Pitchford, M. L., 2004: Reconciliation of particulate sulfate source apportionment during the BRAVO study, Air and Waste Management Association Specialty Conference.October 25-29, 2004, Ashville, NC
  • Barna, M. G., Gebhart, K. A., Malm, W. C., Schichtel, B. A., 2004: Regional simulation of sulfate aerosol for the BRAVO study, Electric Utilities Environmental Conference, Air Quality, Global Climate Change and Renewable Energy.2004, Tucson, AZ
  • Barna, M. G., Gebhart, K. A., Malm, W. C., Schichtel, B. A., 2004: Simulating sulfate contributions from regional sources at six national parks during the BRAVO study, Air and Waste Management Association Specialty Conference.October 25-29, 2004, Ashville, NC
  • Gebhart, K. A., Ashbaugh, L. L., Malm, W. C., 2004: Summary of spatial, temporal, and inter-species patterns in fine particulate data in Texas, Air and Waste Management Association Specialty Conference.October 25-29, 2004, Ashville, NC
  • Hand, J. L., Gebhart, K. A., Malm, W. C., Schichtel, B. A., 2004: The contribution of mineral aerosols to visibility estimates in the western U.S. during the Asian dust event of Spring 2001, Electric Utilities Environmental Conference, Air Quality, Global Climate Change and Renewable Energy.2004, Tucson, AZ
  • Barna, M. G., Fox, D. G., Gebhart, K. A., Malm, W. C., Schichtel, B. A., 2003: Assessing the impact of regional pollutant sources on air quality and visibility at Big Bend National Park with REMSAD, 96th Annual AWMA Conference.2003, San Diego, CA
  • Schichtel, B. A., Barna, M. G., Gebhart, K. A., Malm, W. C., 2003: Assessment of the source receptor relationship at Big Bend, TX, using forward airmass histories, 96th Annual AWMA Conference.2003, San Diego, CA
  • Gebhart, K. A., 2003: Big Bend Regional Aerosol and Visibility (BRAVO) study, Presented to the Big Bend National Park management and staff.2003, Big Bend National Park, TX
  • Gebhart, K. A., Barna, M. G., Schichtel, B. A., 2003: Comparison of results of back-trajectory modeling using several combinations of models and input wind fields during the BRAVO study, 96th Annual AWMA Conference.2003, San Diego, CA
  • Schichtel, B. A., Barna, M. G., Gebhart, K. A., Malm, W. C., 2003: Integrating air quality data and Eulerian modeling results to apportion Big Bend Texas' sulfate among sources in the United States and Mexico, AGU Fall Meeting.2003, San Francisco, CA
  • Barna, M. G., Gebhart, K. A., Malm, W. C., Schichtel, B. A., 2003: Investigating pollutant sources that contribute sulfate aerosol to Big Bend National Park with the REMSAD air quality model, Presented to the Big Bend National Park management and staff.2003, Big Bend National Park, TX
  • Schichtel, B. A., Barna, M. G., Gebhart, K. A., Malm, W. C., 2003: Source apportionment of particulate sulfur at Big Bend National Park using an inverse modeling technique, Air and Waste Management Association Conference.2003, San Diego, CA
  • Gebhart, K. A., Barna, M. G., Schichtel, B. A., 2003: Source apportionment of sulfate and unique tracers at Big Bend National Park using a back-trajectory receptor model and measurements from the BRAVO study, 96th Annual AWMA Conference.2003, San Diego, CA
  • Schichtel, B. A., Barna, M. G., Gebhart, K. A., Malm, W. C., 2003: Transport patterns during high and low sulfur concentrations at Big Bend, Texas during BRAVO, 96th Annual Air and Waste Management Association Conference.2003, San Diego, CA
  • Malm, W. C., Ames, R. B., Gebhart, K. A., Schichtel, B. A., 2002: A ten-year spatial and temporal trend of sulfate across the United States, J. Geophys. Res., vol. 107, 4626
  • Gebhart, K. A., 2002: BRAVO source apportionment and wind field/model evaluation, Big Bend Regional Aerosol and Visibility Observational Study (BRAVO) .2002, Lakewood, CO
  • Gebhart, K. A., 2002: Back trajectory techniques used for the Big Bend National Park BRAVO study, Lake Michigan Air Directors Cooperative (LADCO) Workshop: Trajectories and Source Apportionment.2002, Des Plaines, IL
  • Gebhart, K. A., 2002: NPS receptor modeling techniques, Western States Air Resources Council (WESTAR) Technical Conference.2002, Riverside, CA
  • Gebhart, K. A., 2002: Receptor modeling techniques, WESTAR Regionally Attributable Best Available Retrofit Technology (REBART) Committee Meeting.2002, Tempe, AZ
  • Barna, M. G., Gebhart, K. A., Green, M. C., Schichtel, B. A., 2002: Simulation of the transport and dispersion of perfluorocarbon tracers released in Texas using multiple assimilated meteorological wind fields, AGU Annual Conference.2002, San Francisco, CA
  • Gebhart, K. A., Malm, W. C., Schichtel, B. A., 2001: Analysis of several back-trajectory methods for potential use in source apportionment studies for the BRAVO project, Specialty Conference of the Air and Waste Management Association.October 2-5, 2001, Bend, OR
  • Schichtel, B. A., Gebhart, K. A., Malm, W. C., 2001: Assessment of the source receptor relationship at Big Bend, TX, using forward airmass histories: Methodology and evaluation, AWMA/AGU Regional Haze and Global Radiation Balance Conference.October 2-5, 2001, Bend, OR
  • Gebhart, K. A., Copeland, S. A., Malm, W. C., 2001: Diurnal and seasonal patterns in light scattering, extinction, and relative humidity, Atmospheric Environment, vol. 35, 5177-5191
  • Gebhart, K. A., Copeland, S. A., 2001: Diurnal patterns in light scattering, extinction, and relative humidity, Atmos. Environ., vol. 35, 5177-5191
  • Gebhart, K. A., Ashbaugh, L. L., Malm, W. C., Schichtel, B. A., 2001: Empirical orthogonal function (EOF) analysis of BRAVO particulate data, International Specialty Conference of the Air and Waste Management Association.October 2-5, 2001, Bend, OR
  • Schichtel, B. A., Gebhart, K. A., 2001: Source oriented regional scale transport analyses to Big Bend, Texas, during the Big Bend Regional Aerosol and Visibility study, International Specialty Conference of the Air and Waste Management Association.October 2-5, 2001, Bend, OR
  • Schichtel, B. A., Gebhart, K. A., 2001: Transport patterns associated with high and low sulfate concentration at Big Bend, Texas during the Big Bend Regional Aerosol and Visibility study, International Specialty Conference of the Air and Waste Management Association.October 2-5, 2001, Bend, OR
  • Schichtel, B. A., Gebhart, K. A., Malm, W. C., 2001: Transport patterns during high and low sulfur concentrations at Big Bend, Texas during BRAVO, AWMA/AGU Regional Haze and Global Radiation Balance Conference.October 2-5, 2001, Bend, OR
  • Malm, W. C., Ames, R. B., Ashbaugh, L. L., Collett, J. L. Jr., Copeland, S., Gebhart, K. A., Lebens, R., Molenar, J. V., Schichtel, B. A., Sisler, J. F., Vimont, J., 2001: WESTAR/NPS visibility monitoring data analysis, WESTAR/NPS Visibility Monitoring Data Analysis Workshop.August 28-29, 2001, Fort Collins, CO
  • Gebhart, K. A., Flores, M., Malm, W. C., 2000: A preliminary look at source-receptor relationships in the Texas-Mexico border area, Journal of the Air and Waste Management Association, vol. 50, 858-868
  • Gebhart, K. A., Kreidenweis, S. M., Malm, W. C., 2000: Back-trajectory analyses of fine particulate matter measured at Big Bend National Park in the historical database and the 1996 scoping study, The Science of Total Environment, vol. 276, 185-204
  • Gebhart, K. A., Copeland, S. A., 2000: Diurnal patterns in light scattering, extinction, and relative humidity, Conference on Visibility, Aerosols, and Atmospheric Optics.September 11-15, 2000, Vienna, Austria
  • Malm, W. C., Ames, R. B., Copeland, S. A., Day, D. E., Gebhart, K. A., Pitchford, M. L., Sisler, J. F., 2000: Spatial and seasonal patterns and temporal variability of haze and its constituents in the United States: Report III
  • Sherman, D. E., Collett, J. L. Jr., Day, D. E., Gebhart, K. A., Hand, J. L., Kreidenweis, S. M., Lee, Taehyoung (T.), Malm, W. C., 2000: The influence of meteorological conditions on ambient particle concentrations during BRAVO, 19th Annual American Association for Aerosol Research Conference.November 6-10, 2000, St. Louis, MO
  • Golestani, Y., Gebhart, K. A., Malm, W. C., 2000: Visual air quality plume simulation and contrast measurements, 93rd Annual Conference of the Air and Waste Management Association.June 18-22, 2000, Salt Lake City, UT
  • Gebhart, K. A., Flores, M., Malm, W. C., 1997: A preliminary look at source-receptor relationships in the Texas-Mexico border area, Visual Air Quality Aerosols and Global Radiation Balance Conference.September 1997, Bartlett, NH
  • Malm, W. C., Gebhart, K. A., 1997: Source apportionment of sulfur and light extinction using receptor modeling techniques, J. Air Waste Mgmt. Assn., vol. 47, 250-268
  • Gebhart, K. A., Malm, W. C., 1997: Spatial and temporal patterns in particle data measured during the MOHAVE study, J. Air Waste Mgmt. Assn., vol. 47, 119-135
  • Malm, W. C., Gebhart, K. A., 1996: Source apportionment of organic and light absorbing carbon using receptor modeling techniques, Atmos. Environ., vol. 30, 843-855
  • Gebhart, K. A., Malm, W. C., 1994: Estimation of emission rates in Mexico by receptor modeling, International Specialty Conference.1994, Snowbird, UT
  • Gebhart, K. A., Day, D. E., Malm, W. C., 1994: Examination of the effects of sulfate acidity and relative humidity on light scattering at Shenandoah National Park, Atmos. Environ., vol. 28, 841-849
  • Malm, W. C., Gebhart, K. A., 1994: Source apportionment of secondary aerosols and light extinction using receptor modeling techniques, International Specialty Conference.1994, Snowbird, UT
  • Gebhart, K. A., Malm, W. C., 1994: Source attribution and statistical summary of data measured at Grand Canyon National Park during 1989-1991, International Specialty Conference.1994, Snowbird, UT
  • Gebhart, K. A., Malm, W. C., 1994: Spatial and temporal patterns in particle data measured during the MOHAVE study, International Specialty Conference.1994, Snowbird, UT
  • Gebhart, K. A., Iyer, H. K., Malm, W. C., 1993: Comparison of two back trajectory techniques for source apportionment, 86th Annual Meeting of the Air and Waste Management Association.1993, Denver, CO
  • Malm, W. C., Cahill, T. A., Eldred, R. A., Gebhart, K. A., Huffman, D., Molenar, J. V., 1993: Examining the relationship between atmospheric aerosol and light extinction at Mount Rainier and North Cascades National Parks, Atmos. Environ., vol. 28, 347-360
  • Malm, W. C., Gebhart, K. A., 1993: Source apportionment of organic and light absorbing carbon using receptor modeling techniques, 86th Annual Meeting of the Air and Waste Management Association., Denver, CO
  • Malm, W. C., Cahill, T. A., Eldred, R. A., Gebhart, K. A., Molenar, J. V., 1992: Apportionment of aerosol extinction at Mount Rainier and North Cascades National Parks, 85th Annual Meeting of the Air and Waste Management Association.June 16-21, 1992, Kansas City, MO
  • Gebhart, K. A., Day, D. E., Malm, W. C., 1992: Examination of the effects of sulfate acidity and relative humidity on light scattering at Shenandoah National Park, Conference on Visibility and Fine Particles.September 1992, Vienna, Austria
  • Gebhart, K. A., Malm, W. C., 1992: Spatial and temporal patterns of several particulate species in Washington State during the summer of 1990, 85th Annual Meeting of the Air and Waste Management Association.June 16-21, 1992, Kansas City, MO
  • Sisler, J. F., Cahill, T. A., Gebhart, K. A., Malm, W. C., Molenar, J. V., 1992: The effect of relative humidity on visibility: Continental distributions, 85th Annual Air and Waste Management Association.June 16-21, 1992, Kansas City, MO
  • Malm, W. C., Gebhart, K. A., Golestani, Y., Yao, M., 1991: Characteristics of haze in Shenandoah National Park, 84th Annual Meeting of the Air and Waste Management Association.June 16-21, 1991, Vancouver, British Columbia
  • Malm, W. C., Cahill, T. A., Eldred, R. A., Gebhart, K. A., Golestani, Y., Poirot, R. L., 1991: Estimation of aerosol acidity in the Eastern United States, 84th Annual Meeting of the Air and Waste Management Association.June 16-21, 1991, Vancouver, British Columbia
  • Gebhart, K. A., Malm, W. C., 1991: Examination of source regions and transport pathways of organic and light absorbing carbon into remote areas of the United States, 84th Annual Meeting of the Air and Waste Management Association.June 16-21, 1991, Vancouver, British Columbia
  • Dattore, R. E., Flores, M., Gebhart, K. A., Malm, W. C., 1991: Use of an atmospheric trajectory model to explore the source regions affecting ozone concentrations at five eastern U.S. national parks, 84th Annual Meeting of the Air and Waste Management Association.June 16-21, 1991, Vancouver, British Columbia
  • Gebhart, K. A., Ahlbrandt, R. A., Iyer, H. K., Malm, W. C., 1988: Estimating the fractional contribution of secondary aerosols from different source areas on a regional scale, AMS 81st Annual Meeting of the Air Pollution Control Association.19-24 June 1988, Dallas, TX
  • Malm, W. C., Gebhart, K. A., 1988: Optical characteristics of aerosols at three national parks, 81st Annual Meeting of the Air Pollution Control Association.June 19-24, 1988, Dallas, TX
  • Malm, W. C., Gebhart, K. A., Henry, R. C., 1988: Source areas of fine sulfur in the Western United States as investigated by principal component analysis and residence time analysis, 81st Annual Meeting of the Air Pollution Control Association.June 19-24, 1988, Dallas, TX
  • Sisler, J. F., Gebhart, K. A., Malm, W. C., 1988: Sources of ions producing acidic rain and visibility impairment at Grand Canyon, Arizona, 81st Annual Meeting of the Air Pollution Control Association.June 19-24, 1988, Dallas, TX
  • Bresch, J. F., Gebhart, K. A., Iyer, H. K., Klitch, M. A., Malm, W. C., Reiter, E. R., 1987: Origins of sulfur-laden air at national parks in the continental United States
  • Bresch, J. F., Gebhart, K. A., Iyer, H. K., Klitch, M. A., Malm, W. C., Reiter, E. R., 1986: Origins of sulfur-laden air at national parks in the continental United States, Air Pollution Control Association Transactions, International Specialty Conference on Atmospheric Visibility.September 1986, Grand Teton National Park
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