Office of Research and Development Publications

Records 1 to 54 of 54

Pleim, Jon, R. Gilliam, David-C Wong, J. Herwehe, R. Bullock, Bill Hutzell, G. Pouliot, C. Hogrefe, W. Appel, L. Ran, AND H. Foroutan. Development of the Next Generation Air Quality Modeling System (20th Joint Conference on the Applications of Air Pollution Meteorology with the A&WMA). 20th Joint Conference on the Applications of Air Pollution Meteorology with the A&WMA, Austin, TX, January 07 - 11, 2018.
Herwehe, J., R. Bullock, R. Gilliam, Jon Pleim, AND H. Foroutan. Implementing subgrid-scale cloudiness into the Model for Prediction Across Scales-Atmosphere (MPAS-A) for next generation global air quality modeling. 16th Annual CMAS Conference, Chapel Hill, North Carolina, October 23 - 25, 2017.
Pleim, Jon, R. Gilliam, David-C Wong, J. Herwehe, R. Bullock, G. Pouliot, C. Hogrefe, W. Appel, Bill Hutzell, D. Kang, L. Ran, AND H. Foroutan. Development of the Next Generation Air Quality Modeling System. 16th Annual CMAS Conference, Chapel Hill, North Carolina, October 23 - 25, 2017.
Bullock, R., R. Gilliam, J. Herwehe, AND H. Foroutan. Refinement and testing of analysis nudging in MPAS-A. 18th Annual WRF Users’ Workshop, Boulder, CO, June 12 - 16, 2017.
Herwehe, J., R. Gilliam, R. Bullock, Jon Pleim, AND H. Foroutan. Progress on Implementing Additional Physics Schemes into MPAS-A v5.1 for Next Generation Air Quality Modeling. 18th Annual WRF Users Workshop, Boulder, CO, June 12 - 16, 2017.
Foroutan, H., David-C Wong, Jon Pleim, R. Bullock, J. Herwehe, G. Pouliot, AND C. Hogrefe. Towards the Next Generation Air Quality Modeling System: Current Progress on Implementing Chemistry into MPAS-A. 18th Annual WRF Users' Workshop, Boulder, CO, June 12 - 16, 2017.
Bullock, R. Adding Four- Dimensional Data Assimilation (a.k.a. grid nudging) to MPAS. 17th Annual WRF Users' Workshop, Boulder, CO, June 27 - July 01, 2016.
Bullock, R., Kiran Alapaty, J. Herwehe, AND J. Kain. A Dynamically Computed Convective Time Scale for the Kain–Fritsch Convective Parameterization Scheme. Monthly Weather Review. American Meteorological Society, Boston, MA, 143(6):2105-2120, (2015).
Bullock, R. AND E. Salmon. Refinement of horizontal resolution in dynamical downscaling of climate information using WRF: Costs, benefits, and lessons learned. American Meteorological Society, Louisiana, NO, January 11 - 12, 2016.
Bash, J., A. Carlton, Bill Hutzell, AND R. Bullock. Regional Air Quality Model Application of the Aqueous-Phase Photo Reduction of Atmospheric Oxidized Mercury by Dicarboxylic Acids. ATMOSPHERE. MDPI AG, Basel, Switzerland, 5(1):1-15, (2014).
Mallard, M., Chris Nolte, T. Spero, R. Bullock, J. Herwehe, AND Kiran Alapaty. : “Developing Regional Modeling Techniques Applicable for Simulating Future Climate Conditions in the Carolinas”. Carolinas Climate resilience Conference, Charolotte, NC, April 28 - 29, 2014.
Spero, T., Chris Nolte, Kiran Alapaty, R. Bullock, M. Mallard, J. Herwehe, AND J. Bowden. Downscaled Regional Climate Information for the Southeastern US. Carolinas Climate Resilience Conference, Charlotte, NC, April 28, 2014.
Nolte, Chris, T. Spero, R. Bullock, J. Herwehe, M. Mallard, J. Bowden, AND Kiran Alapaty. Projecting Changes in Climate & Air Quality for the Southeastern U.S. Carolinas Climate Resilience Conference, Charlotte, NC, April 28 - 29, 2014.
Mallard, M., Chris Nolte, R. Bullock, T. Otte, AND J. Gula. Using a Freshwater Lake Model Coupled with WRF for Dynamical Downscaling Applications. Presented at AMS Annual Meeting, Atlanta, GA, February 04 - 05, 2014.
Mallard, M., Chris Nolte, T. Spero, R. Bullock, Kiran Alapaty, J. Herwehe, J. Gula, AND J. Bowden. Technical Challenges and Solutions in Representing Lakes when using WRF in Downscaling Applications. Geoscientific Model Development . Copernicus Publications, Katlenburg-Lindau, Germany, 8(4):939-1110, (2015).
Mallard, M., C. Nolte, R. Bullock, T. Otte, AND J. Gula. Using a Coupled Lake Model with WRF for Dynamical Downscaling. JOURNAL OF GEOPHYSICAL RESEARCH. American Geophysical Union, Washington, DC, 119(12):7193-7208, (2014).
Mallard, M., Chris Nolte, R. Bullock, T. Otte, J. Herwehe, Kiran Alapaty, AND J. Gula. "The Effect of Alternative Representations of Lake Temperatures and Ice on WRF Regional Climate Simulations". Presented at 12th Annual CMAS Conference, Chapel Hill, NC, October 28 - 30, 2013.
Herwehe, J., Kiran Alapaty, T. Otte, Chris Nolte, AND R. Bullock. Evaluation of cumulus cloud – radiation interaction effects on air quality –relevant meteorological variables from WRF, from a regional climate perspective. Presented at 12th Annual CMAS Conference, Chapel Hill, NC, October 28 - 30, 2013.
Bullock, R., Kiran Alapaty, J. Herwehe, M. Mallard, T. Otte, R. Gilliam, AND Chris Nolte. An Observation-base investigation of nudging in WRF for downscaling surface climate information to 12-km Grid Spacing. JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY. American Meteorological Society, Boston, MA, 53(1):20-33, (2014).
Alapaty, Kiran, R. Bullock, J. Herwehe, R. Gilliam, C. Nolte, T. Otte, J. Kain, AND J. Dudhia. The Kain-Fritsch Scheme: Science Updates & Revisiting Gray-Scale Issues from the NWP & Regional Climatae Perspectives. Presented at Annual Wolf Workshop, Boulder, Co, June 23 - 28, 2013.
Myers, T., D. Atkinson, R. Bullock, AND J. Bash. Investigation of Effects of Varying Model Inputs on Mercury Deposition Estimates in the Southwest US. Atmospheric Chemistry and Physics. Copernicus Publications, Katlenburg-Lindau, Germany, 13(2):997-1009, (2013).
Alapaty, Kiran, J. Herwehe, T. Otte, C. Nolte, R. Bullock, M. Mallard, J. Kain, AND J. Dudhia. Introducing Subrid-scale Cloud Feedbacks to Radiation for Regional Meteorological and Cllimate Modeling. GEOPHYSICAL RESEARCH LETTERS. American Geophysical Union, Washington, DC, 39(24):1-5, (2012).
LINDBERG, S., R. BULLOCK, R. EBINGHAUS, D. ENGSTROM, X. FENG, W. F. FITZGERALD, N. PIRONNE, E. PRESTBO, AND C. SEIGNEUR. A SYNTHESIS OF PROGRESS AND UNCERTAINTIES IN ATTRIBUTING THE SOURCES OF MERCURY IN DEPOSITION. AMBIO. Royal Swedish Academy of Sciences, Stockholm, Sweden, 36(1):19-32, (2007).
MATHUR, R., R. C. GILLIAM, R. BULLOCK, S. J. ROSELLE, J. E. PLEIM, D. C. WONG, F. S. BINKOWSKI, AND D. G. STREETS. Extending the Applicability of the Community Multiscale Air Quality Model to Hemispheric Scales: Motivation, Challenges, and Progress. Chapter 30, Douw G. Steyn & Silvia Trini Gastelli (ed.), NATO/SPS/ITM Air Pollution Modeling and its Application XXI. Springer Netherlands, , Netherlands, C Series:175-179, (2011).
BULLOCK, R. AND L. Jaegle. Importance of a Global Approach to Using Regional Models in the Assessment of Source-Receptor Relationships of Mercury. Chapter 16, N. Pirrone, R. Mason (ed.), Mercury Fate and Transport in the Global Atmosphere: Measurement, models and policy implications. Springer-Verlag, Berlin, Germany, Chapter 16:503-517, (2009).
BULLOCK, R., D. ATKINSON, T. BRAVERMAN, K. Civerolo, A. Dastoor, D. Davignon, J. Ku, K. Lohman, T. MYERS, R. J. Park, C. SEIGNEUR, N. E. SELIN, G. Sistla, AND K. Vijayaraghavan. An Analysis of Simulated Wet Deposition of Mercury from the North American Mercury Model Intercomparison Study. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES. American Geophysical Union, Washington, DC, 114(D08301):1-12, (2009).
BULLOCK, R., D. ATKINSON, T. BRAVERMAN, K. Civerolo, A. Dastoor, D. Davignon, J. Ku, K. Lohman, T. C. Meyer, R. J. Park, C. Seigneur, N. E. SELIN, G. Sistla, AND K. Vijayaraghavan. The North American Mercury Model Intercomparison Study (NAMMIS). Study Description and Model-to-Model Comparison. JOURNAL OF GEOPHYSICAL RESEARCH. American Geophysical Union, Washington, DC, 113(D17310):1-17, (2008).
RYABOSHAPKO, A., R. BULLOCK, J. CHRISTENSEN, M. COHEN, A. DASTOOR, I. ILYIN, G. PETERSEN, D. SYRAKOV, R. S. ARTZ, D. DAVIGNON, R. R. DRAXLER, AND J. MUNTHE. INTERCOMPARISON STUDY OF ATMOSPHERIC MERCURY MODELS: 2. MODELING RESULTS VS. LONG-TERM OBSERVATIONS AND COMPARISON OF COUNTRY ATMOSPHERIC BALANCES. SCIENCE OF THE TOTAL ENVIRONMENT. Elsevier Science Ltd, New York, NY, 377(2-3):319-333, (2007).
RYABOSHAPKO, A., R. BULLOCK, J. CHRISTENSEN, M. COHEN, A. DASTOOR, I. ILYIN, G. PETERSEN, D. SYRAKOV, R. S. ARTZ, D. DAVIGNON, R. R. DRAXLER, AND J. MUNTHE. INTERCOMPARISON STUDY OF ATMOSPHERIC MERCURY MODELS: 1. COMPARISON OF MODELS WITH SHORT-TERM MEASUREMENTS. SCIENCE OF THE TOTAL ENVIRONMENT. Elsevier Science Ltd, New York, NY, 376(1-3):228-240, (2007).
BULLOCK, R. The Effect of Lateral Boundary Values on Atmospheric Mercury Simulations with the CMAQ Model. Chapter 2, Carlos Borrego; Ana Isabel Miranda (ed.), Air Pollution Modeling and its Application XIX. Springer, New York, NY, (Series C):173-181, (2008).
BULLOCK, R. MODELING TRANSPORT AND TRANSFORMATION OF HG COMPOUNDS IN CONTINENTAL AIR MASSES. Chapter 14, Dynamics of Mercury Pollution on Regional and Global Scales. Springer Science and Business Media B.V;Formerly Kluwer Academic Publishers B.V., , Germany, , 319-344, (2005).
PONGPRUEKSA, P., C. LIN, S. LINDBERG, C. JANG, T. BRAVERMAN, R. BULLOCK, T. C. HO, AND H. CHU. SCIENTIFIC UNCERTAINTIES IN ATMOSPHERIC MERCURY MODELS III: BOUNDARY AND INITIAL CONDITIONS, MODEL GRID RESOLUTION, AND HG(II) REDUCTION MECHANISMS. ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, 42(8):1828-1845, (2008).
Mason, R. P., M. L. Abbott, D. Bodaly, O R. Bullock, C. T. Driscoll, D. Evers, S. E. Lindberg, M. Murray, AND E. Swain. MONITORING THE RESPONSE TO CHANGING MERCURY DEPOSITION. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, 1:15A-22A, (2005).
LIN, C., P. PONGPRUEKSA, R. BULLOCK, S. LINDBERG, S. O. PEHKONEN, C. JANG, T. BRAVERMAN, AND T. C. HO. SCIENTIFIC UNCERTAINTIES IN ATMOSPHERIC MERCURY MODELS II: SENSITIVITY ANALYSIS IN THE CONUS DOMAIN. ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, 41(31):6544-6560, (2007).
BULLOCK, R. REGIONAL-SCALE ATMOSPHERIC MERCURY MODELING. Presented at 31st Annual EPA-AWMA Information Exchange, Research Triangle Park, NC, December 05, 2006.
PLEIM, J. E., S. J. ROSELLE, P. BHAVE, R. BULLOCK, W. T. HUTZELL, D. J. LUECKEN, C. G. NOLTE, K. L. SCHERE, J. O. YOUNG, J. M. GODOWITCH, AND W. APPEL. THE 2006 CMAQ RELEASE AND PLANS FOR 2007. Presented at 5rh Annual CMAS Models-3 User's Conference, Chapel Hill, NC, October 16 - 18, 2006.
BULLOCK, R., D. ATKINSON, T. BRAVERMAN, A. DASTOOR, D. DAVIGNON, N. ECKLEY-SELIN, D. JACOB, K. LOHMAN, C. SEIGNEUR, K. VIJAYARAGHAVAN, T. MYERS, K. CIVEROLO, AND C. HOGREFE. THE NORTH AMERICAN MERCURY MODEL INTER-COMPARISON STUDY (NAMMIS). Presented at 28th NATO/CCMS International Technical Meeting, Leipzig, GERMANY, May 15 - 19, 2006.
BULLOCK, R. AND T. BRAVERMAN. SENSITIVITY OF THE CMAQ MERCURY MODEL TO GAS-PHASE OXIDATION CHEMISTRY. Presented at 8th International Conference on Mercury, Madison, WI, August 06 - 11, 2006.
BULLOCK, R., K. LOHMAN, C. SEIGNEUR, K. VIJAYARAGHAVAN, A. DASTOOR, D. DAVIGNON, N. E. SELIN, D. J. JACOB, T. MYERS, K. CIVEROLO, C. HOGREFE, J. KU, G. SISTLA, D. ATKINSON, AND T. BRAVERMAN. RESULTS FROM THE NORTH AMERICAN MERCURY MODEL INTER-COMPARISON STUDY (NAMMIS). Presented at 8th International Conference on Mercury, Madison, WI, August 06 - 11, 2006.
Bullock, O R. THE IMPORTANCE OF EMISSIONS SPECIATION TO THE ATMOSPHERIC TRANSPORT AND DEPOSITION OF MERCURY. Presented at EPA Conference on Assessing and Managing mercury from Historic and Current Mining Activities, San Francisco, CA, November 28-30, 2000.
Bullock, O R. MODELING ASSESSMENT OF TRANSPORT AND DEPOSITION PATTERNS OF MERCURY AIR EMISSIONS FROM THE U.S. AND CANADA. Presented at 5th International Conference on Mercury as a Global Pollutant, Rio de Janeiro, Brazil, May 23-28, 1999.
Bullock, O R. AQUEOUS REDUCTION OF HG2+ TO HG0 BY HO2 IN THE CMAQ-MODEL. Presented at International Conference on Mercury as a Global Pollutant, Ljubljana, Slovinia, June 27-July 2, 2004.
Bullock, O R. ATMOSPHERIC CHEMISTRY AND THE RELATIVE IMPORTANCE OF MERCURY SOURCES. Presented at USGS 2004 Mercury Workshop, Reston, VA, August 17-18, 2004.
Bullock, O R. AQUEOUS REDUCTION OF HG2+ TO HG0 BY HO2 IN THE CMAQ MODEL. Presented at International Conference on Mercury as a Global Pollutant, Ljubljana, Slovenia, June 27-July 2, 2004.
Bullock, O R. MODELING ATMOSPHERIC MERCURY IN CONTINENTAL AIR MASSES. Presented at International Workshop on Harmonization of Mercury Measurements Methods & Models to Assess Source-Receptors Impact on Air Quality & Human Health, Maratea, Italy, May 23-26, 2004.
Bullock, O R., W G. Benjey, AND M. H. Keating. THE MODELING OF REGIONAL-SCALE ATMOSPHERIC MERCURY TRANSPORT AND DEPOSITION USING RELMAP. 15th Annual Meeting of SETAC, Denver, CO, Oct. 3 - Nov 3, 1994.
HOGREFE, C., S.T. RAO, R. BULLOCK, A. GILLILAND, AND P. L. KINNEY. SIMULATING REGIONAL-SCALE AIR QUALITY WITH DYNAMIC CHANGES IN REGIONAL CLIMATE AND CHEMICAL BOUNDARY CONDITIONS. Presented at International Conference on Mesoscale Processes in Atmosphere, Ocean and Environmental Systems (IMPA 2006), New Delhi, INDIA, February 14 - 17, 2006.
BULLOCK, R. ATMOSPHERIC MERCURY TRANSPORT AND DEPOSITION. Presented at 2005 Air Toxics Workshop, RTP, NC, March 31, 2005.
Franson, S E., G P. Toth, R. VanRemortel, O R. Bullock, D J. Luecken, R G. Zepp, AND S L. Bird. AN APPROACH TO THE ASSESSMENT OF THE EXPOSURE OF FORESTS TO MULTIPLE STRESSORS. Presented at SETAC, Seattle, WA, Aug. 17, 1998.
Lunetta, R S., R Araujo, S L. Bird, L A. Burns, O R. Bullock, D. E. Carpenter, R. F. Carsel, K Endres, B H. Hill, K B. Jones, D J. Luecken, AND R G. Zepp. MID-ATLANTIC STRESSOR PROFILE ATLAS. U.S. Environmental Protection Agency, Washington, DC, EPA/600/C-99/003 (NTIS PB2002-101930), 1999.
Bullock, O R. MERCURY MODELING AND MEASUREMENTS AND THEIR SOURCE CONTROL IMPLICATIONS. Presented at 1999 POP and Heavy Metals Workshop, Durham, NC, October 10-11, 1999.
Bullock, O R. AND K. A. Brehme. ATMOSPHERIC MERCURY SIMULATION USING THE CMAQ MODEL: FORMULATION DESCRIPTION AND ANALYSIS OF WET DEPOSITION RESULTS. ATMOSPHERIC ENVIRONMENT 36(13):2135-2146, (2002).
Bullock, O R. CURRENT METHODS AND RESEARCH STRATEGIES FOR MODELING ATMOSPHERIC MERCURY. FUEL PROCESSING TECHNOLOGY 65-66:459-471, (2000).
Bullock, O R., K. A. Brehme, AND G. Mapp. LAGRANGIAN MODELING OF MERCURY AIR EMISSION, TRANSPORT AND DEPOSITION: AN ANALYSIS OF MODEL SENSITIVITY TO EMISSIONS UNCERTAINTY. SCIENCE OF THE TOTAL ENVIRONMENT 213:1-12, (1998).