Dr. Morris studies air quality using weather balloons. His Houston project includes more than 500 flights since 2004 involving over 40 students, mostly undergraduates. His air quality work has taken him to Panama, Costa Rica, and Japan. Dr. Morris arrived at St. Ed's in July 2014 as Dean of NSCI.
Dr. Morris teaches physics, astronomy, meteorology & earth science. He held a Dept. of Energy Global Change Graduate Fellowship and a National Research Council Post-Doctoral Fellowship at NASA studying the ozone layer before becoming a research faculty member at UMBC. He began studying ozone pollution while a Weiss Instructor of Physics at Rice (2000 - 2004), where he started his weather balloon project, then taught at Valparaiso U. from 2004 - 2010 before becoming Associate Dean there. During 2008 and 2009 he was a Fulbright Scholar in Japan studying the influence of Chinese pollution before, during, and after the Olympics. Dr. Morris became Dean of Natural Sciences at SEU in July 2014.
My research focuses on measurements and modeling of air quality (particularly ozone) and physics education research. My air quality research has centered on Houston, Texas since 2004, resulting in the largest megacity ozonesonde profile dataset in the world (>500 profiles). My air quality project website can be found at http://physics.valpo.edu/ozone. I also had the chance to pursue a Fulbright Scholar research project in Japan (2008 - 2009, blog at http://polympics.wordpress.com.)
1. Stauffer, R.M., G.A. Morris, A.M. Thompson, E. Joseph, and G.J.R. Coetzee, Propagation of radiosonde pressure sensor errors to ozonesonde measurements, Atmos. Meas. Tech. Discuss., 6, 7771 – 7810, 2013 and Atmos. Meas. Tech., 7, 65 – 79, 2014.
2. Morris, G.A., G. Labow, H. Akimoto, M. Takigawa, M. Fujiwara, F. Hasebe, J. Hirokawa, and T. Koide, On the use of the correction factor with Japanese ozonesonde data, Atmos. Chem. Phys. Discuss., 12, 15,597 – 15,638, 2012; Atmos. Chem. Phys., 13, 1243 – 1260, 2013.
3. Morris, G.A., L. Branum-Martin, N. Harshman, E. Mazur, T. Mzoughi, and S.D. Baker, An Item Response Curves analysis of the Force Concept Inventory, Am. J. Phys., 80(9), 825 – 831, 2012.
4. Haman, C.L., B. Lefer, and G.A. Morris, Seasonal variability in the diurnal evolution of the boundary layer in a near coastal urban environment, J. Atmos. Ocean. Tech., 29 (5), 697 – 710, 2012.
5. Tang, W., D.S. Cohan, G.A. Morris, D.W. Byun, W.T. Luke, Influence of vertical mixing uncertainties on ozone simulation in CMAQ, Atmos. Environ., 45 (17), 2898 – 2909, 2011.
6. Morris, G.A., W. Komhyr, J. Hirokawa, J. Flynn, N. Krotkov, and B. Lefer, A balloon sounding technique for measuring SO2 plumes, J. Atmos. Ocean. Tech., 27 (8), 1318 – 1330, 2010.
7. Morris, G.A., A.M. Thompson, K.E. Pickering, S. Chen, E.J. Bucsela, and P.A. Kucera, Observations of ozone production in a dissipating tropical convective cell during TC4, Atmos. Chem. Phys. Discuss., 10, 18,953 – 19,004, 2010; Atmos. Chem. Phys., 10, 11,189 – 11,208, 2010.
8. Krotkov, N.A., M.R. Schoeberl, G.A. Morris, S. Carn, and K. Yang, Dispersion and lifetime of the SO2 cloud from the August 2008 Kasatochi eruption, J. Geophys. Res., 115, D00L20, doi:10.1029/2010JD013984, 2010.
9. Thompson, A.M., A.M. MacFarlane,G.A. Morris, J.E. Yorks, S.K. Miller, B.F. Taubman, G. Verver, H. Vomel, M.A. Avery, J.W. Hair, G.S. Diskin, E.V. Browell, J.V. Canossa, T.L. Kucsera, C.A. Klich, and D.L. Hlavka, Convective wave signatures in ozone profiles over the equatorial Americas: Views from TC4 (2007) and SHADOZ, J. Geophys. Res., 115, D00J23, doi:10.1029/2009JD012909, 2010.
10. Morris, G.A., B. Ford, B. Rappengluck, A.M. Thompson, A. Mefferd, F. Ngan, and B. Lefer, An evaluation of the interaction of morning residual layer and afternoon mixed layer ozone in Houston using ozonesonde data, Atmos. Environ., 44, doi:10.1016/j.atmosenv.2009.06.057, 4024 – 4034, 2010.
11. Pierce, R.B., J. Al-Saadi, C. Kittaka, T. Schaack, A. Lenzen, K. Bowman, J. Szykman, A. Soja, T. Ryerson, A.M. Thompson, P. Bhartia, and G.A. Morris, Impacts of background ozone production on Houston and Dallas, TX air quality during the TexAQS field mission, J. Geophys. Res., 114, D00F09, doi:10.1029/2008JD011337, 2009.
12. Rappenglück, B., R. Perna, S. Zhong, and G.A. Morris, An analysis of the vertical structure of the atmosphere and the upper-level meteorology and their impact on surface ozone levels in Houston, TX, J. Geophys. Res., 113, D17315, doi:10.1029/2007JD009745, 2008.
13. Fishman, J., K.W. Bowman, J.P. Burrows, A. Richter, K.V. Chance, D.P. Edwards, R.V. Martin, G.A. Morris, R.B. Pierce, J.R. Ziemke, J.A. Al-Saadi, T.K. Schaack, and A.M. Thompson, Remote sensing of tropospheric pollution from space, Bull. Am. Meteorol. Soc., 89, 6, 805 – 821, 2008.
14. Thompson, A.M., J.E. Yorks, S.K. Miller, J.C. Witte, K.M. Dougherty, G.A. Morris, D. Baumgardner, L. Ladino, and B. Rappenglück, Free tropospheric ozone sources and wave activity over Mexico City and Houston during MILAGRO/Intercontinental Transport Experiment (INTEX-B) ozonesonde network study, 2006 (IONS-06), Atmos. Chem. Phys., 8, 5113 – 5125, 2008.
15. Nassar, R., J.A. Logan, H.M. Worden, I.A. Megretskaia, K.W. Bowman, G.B. Osterman, A.M. Thompson, D.W. Tarasick, S. Austin, H. Claude, M.K. Dubey, W.K. Hocking, B.J. Johnson, E. Joseph, J. Merrill, G.A. Morris, M. Newchurch, S.J. Otlmans, F. Posny, F.J. Schmidlin, H. Vömel, D.N. Whiteman, J.C. Witte, Validation of Tropospheric Emission Spectrometer (TES) Nadir Ozone Profiles Using Ozonesonde Measurements, J. Geophys. Res., 113, D15S17, doi:10.1029/2007JD008819, 2008.
16. Cooper, O.R, M. Trainer, A.M. Thompson, S.J. Oltmans, D.W. Tarasick, J.C. Witte, A. Stohl, S. Eckhardt, J. Lelieveld, M.J. Newchurch, B.J. Johnson, R. W. Portmann, L. Kalnajs, M.K. Dubey, T. Leblanc, I.S. McDermid, G. Forbes, D. Wolfe, T. Carey-Smith, G.A. Morris, B. Lefer, B. Rappenglück, E. Joseph, F. Schmidlin, J. Meagher, F.C. Fehsenfeld, T.J. Keating, R.A. VanCuren, and K. Minschwaner, Evidence for a recurring eastern North America upper tropospheric ozone maximum during summer, J. Geophys. Res., 112, D23304, doi: 10.1029/2007JD008710, 2007.
17. Jiang, Y.B., L. Froidevaux, A. Lambert, N.J. Livesey, W.G. Read, J.W. Waters, B. Bojkov, T. Leblanc, I.S. McDermid, S. Godin-Beckmann, M.J. Filipiak, R.S. Harwood, R.A. Fuller, W.H. Daffer, B.J. Drouin, R.E. Cofield, D.T. Cuddy, R.F. Jarnot, B.W. Knosp, V.S. Perun, M.J. Schwartz, W.V. Snyder, P.C. Stek, R.P. Thurstans, P.A. Wagner, M. Allaart, S.B. Andersen, G. Bodeker, B. Calpini, H. Claude, G. Coetzee, J. Davies, H. De Backer, H. Dier, M. Fujiwara, B. Johnson, H. Kelder, N.P. Leme, G. König-Langlo, E. Kyro, G. Laneve, L.S. Fook, J. Merrill, G. Morris, M. Newchurch, S. Oltmans, M.C. Parronondos, F. Posny, F. Schmidlin, P. Skrivankova, R. Stubi, D. Tarasick, A. Thompson, V. Thouret, P. Viatte, H. Vömel, P. von der Gathen, M. Yela, and G. Zablocki, Validation of Aura Microwave Limb Sounder ozone by ozonesonde and lidar measurements, J. Geophy. Res., 112, D24S34, doi: 10.1029/2007JD008776, 2007.
18. Schoeberl, M.R., J.R. Ziemke, B. Bojkov, N. Livesey, B. Duncan, S. Strahan, L. Froidevaux, S. Kulawik, P.K. Bhartia, S. Chandra, P.F. Levelt, J.C. Witte, A.M. Thompson, E. Cuevas, A. Redondas, D.W. Tarasick, J. Davies, G. Bodeker, G. Hansen, B.J. Johnson, S.J. Oltmans, H. Vomel, M. Allaart, H. Kelder, M. Newchurch, S. Goldin-Beekmann, G. Ancellet, H. Claude, S.B. Andersen, E. Kyro, M. Parrondons, M. Yela, G. Zablocki, D. Moore, H. Dier, P. von der Gathen, P. Viatte, R. Stubi, B. Calpini, P. Skrivankova, V. Dorokhov, H. de Backer, F. J. Schmidlin, G. Coetzee, M. Fujiwara, V. Thoret, F. Posny, G. Morris, J. Merrill, C.P. Leong, G. König-Langlo, and E. Joseph, A trajectory-based estimate of the tropospheric column ozone column using the residual method, J. Geophys. Res., 112, D18105, doi: 10.1029/2007JD008773, 2007.
19. Tarasick, D.W., M.D. Moran, A. Thompson, T. Carey-Smith, Y. Rochon, V.S. Bouchet, W. Gong, P.A. Makar, C. Stroud, S. Ménard, L.-P. Crevier, S. Cousineau, J.A. Pudykiewicz, A. Kallaur, R. Moffet, R. Ménard, A. Robichaud, O.R. Cooper, S.J. Oltmans, J.C. Witte, G. Forbes, B.J. Johnson, J. Merrill, G. Morris, M.J. Newchurch, F.J. Schmidlin, and E. Joseph, Comparison of Canadian air quality forecast models with tropospheric ozone profile measurements above mid-latitude North America during IONS/ICARTT campaign: Evidence for stratospheric input, J. Geophys. Res., 112, D12S22, doi:10.1029/2006JD007782, 2007.
20. Thompson, A.M., J.B. Stone, J.C. Witte, S.K. Miller, R.B. Pierce, R.B. Chatfield, S.J. Oltmans, O.R. Cooper, A.L. Loucks, B.F. Taubman, B.J. Johnson, E. Joseph, T.L. Kucsera, J.T. Merrill, G.A. Morris, S. Hersey, G. Forbes, M.J. Newchurch, F.J. Schmidlin, D.W. Tarasick, V. Thouret, J.-P. Cammas, Intercontinental Chemical Transport Experiment Ozonesonde Network Study (IONS) 2004: 1 Summertime upper troposphere/lower stratosphere ozone over northeastern North America, J. Geophys. Res., 112, D12S12, doi:10.1029/2006JD007441, 2007.
21. Morris, G.A., S. Hersey, A.M. Thompson, S. Pawson, J. Eric Nielsen, P.R. Colarco, W.W. McMillan, A. Stohl, S. Turquety, J. Warner, B.J. Johnson, T.L. Kucsera, D.E. Larko, S.J. Oltmans, and J.C. Witte, Alaskan and Canadian forest fires exacerbate ozone pollution over Houston, Texas, on 19 and 20 July 2004, J. Geophys. Res., 111, D24S03, doi:10.1029/2006JD007090, 2006.
22. Morris, G.A., L. Branum-Martin, N. Harshman, S.D. Baker, E. Mazur, S. Dutta, T. Mzoughi, and V. McCauley, Testing the test: Item response curves and test quality, Am. J. Phys., 74, 449 – 453, 2006.
23. Cooper, O.R., A. Stohl, M. Trainer, A. Thompson, J.C. Witte, S.J. Oltmans, B.J. Johnson, J. Merrill, J.L. Moody, G. Morris, D. Trasick, G. Forbes, P. Nedelec, F.C. Fehsenfeld, J. Meagher, M.J. Newchurch, F.J. Schmidlin, S. Turquety, J.H. Crawford, K.E. Pickering, R.C. Cohen, T. Bertarm, P. Wooldrige, and W.H. Brune, Large upper tropospheric ozone enhancement sabove mid-latitude North America during summer: In situ evidence from the IONS and MOZAIC ozone monitoring network, J. Geophys. Res., 111, D24S05, doi: 10.1029/2006JD007306, 2006.
24. Morris, G.A., M.R. Schoeberl, B. Bojkov, and L.R. Lait, A review of the Match technique as applied to SOLVE/THESEO and AASE-2/EASOE, Atmos. Chem. Phys. Disc., 4, 4665 – 4717, 2004; Atmos. Chem. Phys., 5, 2571 – 2592, 2005.
25. Morris, G.A., M.R. Schoeberl, J.E. Rosenfield, and C.H. Jackman, The potential impact of subsonic and supersonic aircraft exhaust on water vapor in the lower stratosphere assessed via a trajectory model, J. Geophys. Res., 108 (D3), 10.1029/2002JD002614, 06 February 2003.
26. Morris, G.A., J.F. Gleason, J.M. Russell, III, M.R. Schoeberl, and J.P. McCormick, A comparison of HALOE V19 with SAGE II V6.00 ozone observations using trajectory mapping, J. Geophys. Res., 107 (D13), 10.1029/2001JD000847, 12 July 2002.
29. Morris, G.A., S.R. Kawa, A.R. Douglass, M.R. Schoeberl, L. Froidevaux, and J. Waters, Low ozone “pockets” explained, J. Geophys. Res., 103, 3599-3610, 1998.
30. Morris, G.A., D.B. Considine, A.E. Dessler, S.R. Kawa, A.E. Roche, J. Kumer, and J.M. Russell, III, Nitrogen partitioning in the middle stratosphere as observed by the Upper Atmosphere Research Satellite, J. Geophys. Res., 102, 8955-8965, 1997.
31. Dessler, A.E., D.B. Considine, G.A. Morris, M.R. Schoeberl, A.E. Roche, J.L. Mergenthaler, J.M. Russell, J.W. Waters, J.C. Gille, and G.K. Yue, Correlated observations of HCl and ClONO2 from UARS and implications for stratospheric chlorine partitioning, Geophys. Res. Lett., 22, 1721-1724,1995.
32. Morris, G.A., M.R. Schoeberl, L. Sparling, P.A. Newman, L.R. Lait, L. Elson, J. Waters, A.E. Roche, J. Kumer, and J.M. Russell, III, Trajectory mapping and applications to data from the Upper Atmosphere Research Satellite, J. Geophys. Res., 100, 16,491-16,505, 1995.
33. Byrne, G.J., J.R. Benbrook, E.A. Bering, A.A. Few, G.A. Morris, W.J. Trabucco, and E.W. Paschal, Ground-based instrumentation for measurements of atmospheric conduction current and electric field at the South Pole, J. Geophys. Res., 98, 2611-2618, 1993.
27. Morris, G.A., J. Ziemke, J. Gleason, and M.R. Schoeberl, Trajectory mapping: A tool for satellite data validation, J. Geophys. Res., 105, 17,875-17,894, 2000.
28. Schoeberl, M.R., and G. A. Morris, A Lagrangian simulation of subsonic and supersonic aircraft exhaust emissions, J. Geophys. Res., 105, 11,833-11,839, 2000.
1. Morris, G.A., A. Gettelman, and F. Hasebe, Coordinating Observational Campaigns to Study the Tropical Tropopause Layer, EOS, 94 (9), 91, 26 Feb. 2013.
2. Gettelman, A., K.P. Hamilton, G.A. Morris, F. Hasebe, and H.B. Selkirk, U.S.-Japan Bilateral Workshop on the Tropical Tropopause Layer: State of the Current Science and Future Observational Needs, 15 – 19 October 2012, Honolulu, HI, USA, SPARC newsletter, 40, 37 – 47, January 2013.
3. Gettelman, A., G.A. Morris, K.P. Hamilton, H.B. Selkirk, and F. Hasebe, U.S.-Japan Workshop on the Tropical Tropopause Layer: State of Current Science and Future Observational Needs, IGAC News, 48 (November), 39 – 40, 2012.
4. Muller, R., R. J. Salawitch, et al., contributors include G.A. Morris, Chapter 6: Upper Stratospheric Processes in Scientific Assessment of Ozone Depletion: 1998, WMO, 44, 1999.
5. Russell, J.M., H.G.J. Smit, et al., co-authors include G.A. Morris, Chapter 2: Data Quality in Assessment of Trends in the Vertical Distribution of Ozone, WCRP-SPARC, 1, 1998.
6. Morris, G.A. “A Demonstration and Evaluation of Trajectory Mapping.” Ph.D. Thesis, Rice University, August 1994.
7. Bering, E.A., J.R. Benbrook, R. Chadwick, G.J. Byrne, A.A. Few, and G.A. Morris, Feasibility of long term vertical electric current measurements in the Antarctic, Antarctic J. of the U.S., XXVIII, 5, 314-317, 1993.
8. Morris, G.A. “Background and Early Results for the Atmospheric Electrical Current Sensor Project.” Master's Thesis, Rice University, 1992.
9. Bering, E.A., J.R. Benbrook, R. Chadwick, G.J. Byrne, A.A. Few, and G.A. Morris, Magnetospheric influences on atmospheric electricity at the South Pole Station, Proceedings of the Ninth International Conference on Atmospheric Electricity 1992, Volume 1, 476-479, A.I. Voeikor Main Geophysical Observatory, St. Petersburg, Russia, 1992.
10. Few, A.A., G.A. Morris, E.A. Bering, J.R. Benbrook, R. Chadwick, and G.J. Byrne, Maxwell current measurements at the South Pole: Evaluation of measurements and instrument performance, Proceedings of the Ninth International Conference on Atmospheric Electricity 1992, Volume 1, 23-26, A.I. Voeikor Main Geophysical Observatory, St. Petersburg, Russia, 1992.
11. Few, A.A., G.A. Morris, E.A. Bering, J.R. Benbrook, R. Chadwick, and G. J. Byrne, Surface observations of global atmospheric electric phenomena at Amundsen-Scott South Pole Station, Antarctic J. of the U.S., XXVII, 5, 307-309, 1992.
12. Byrne, G.J., E.A. Bering, A.A. Few, and G.A. Morris, Measurements of atmospheric conduction currents and electric fields at the South Pole, Antarctic J. of the U.S., XXVI, 5, 291-294, 1991.
13. Bering, E.A., G.J. Byrne, A.A. Few, and G.A. Morris, Initial results from measurements of atmospheric conduction currents and electric fields at the South Pole, Antarctic J. of the U.S., XXVI, 5, 294-296, 1991.
1. Morris, G.A., An Overview of the Tropospheric Ozone Pollution Project (TOPP): Ozone and SO2 sondes from 2004 – 2014, Texas Air Quality Symposium, University of Texas – Pickle Center, 10 April 2015.
2. Morris, G.A., B.L. Lefer, A.M. Thompson, A.J. Weinheimer, H.B. Selkirk, D.K. Martins, and A. Kotsakis, Urban-scale boundary layer and lower free tropospheric ozone variability in Houston during DISCOVER-AQ (September 2013), 2014 Fall Meeting, AGU, San Francisco, CA, 15 – 19 December 2014.
3. Wilkins, J.L., G. Morris, B. deFoy, and J. Fishman, An Analysis of Seacions Ozonesonde Measurements from St. Louis MO: Providing Insight into How Cross Country, Wildfires and Descending Stratospheric Air over the Great Plains Impact Regional Air Quality, 2014 Fall Meeting, AGU, San Francisco, CA, 15 – 19 December 2014.
4. Kenyon, A.L., S. Schill, N. Heath, G. Morris, B.L. Lefer, and T. Bertram, Ozone in the Free Troposphere: The Impact of Synoptic Meteorology on Ozone Transport to Southern California, 2014 Fall Meeting, AGU, San Francisco, CA, 15 – 19 December 2014.
5. Kotsakis, A., B.L. Lefer, G.A. Morris, A.M. Thompson, D.K. Martins, A.J. Weinheimer, and R.E. Orville, Sources of Ozone in the Free Troposphere in Houston During DISCOVER-AQ 2013, 2014 Fall Meeting, AGU, San Francisco, CA, 15 – 19 December 2014.
7. Selkirk, H.B., N.A. Krotkov, C. Li, G. Morris, J.A. Diaz, S.A. Carn, H. Voemel, P.M. Nord, and K. Larson, Profiling the SO2 Plume from Volcan Turrialba: Ticosonde Balloon Measurements Compared with OMI and OMPS Retrievals,2014 Fall Meeting, AGU, San Francisco, CA, 15 – 19 December 2014.
8. Thompson, A.M., L.E. Ott, B.N. Duncan, S.K. Miller, J.C. Witte, H.B. Selkirk, G.A. Morris, R.M. Stauffer, H.E. Fuelberg, J. Fishman, K.R. Minschwaner, B.J. Johnson, and M. Newchurch, An Overview of Ozone Variability during SEAC4RS from the Seacions Ozonesonde Network,2014 Fall Meeting, AGU, San Francisco, CA, 15 – 19 December 2014.
11. Thompson, A.M., S.K. Miller, J.C. Witte, H.B. Selkirk, G.A. Morris, H.E. Fuelberg, B.J. Johnson, K.R. Minschwaner, J. Fishman, and M. Newchurch, An overview of ozone variability during SEAC4RS from the SEACIONS Ozonesonde Network, NASA SEAC4RS Science Team Meeting, Boulder, Colorado, 15 – 18 April 2014.
12. Clark, R., M. Desjarlais, T. Kolba, K. Leach, G. Morris, J. Westrick, and J. Cunningham, Building an integrative community to develop and retain MSEED Scholars, STEP Grantees Meeting, Washington, DC, 6 – 7 March 2014.
13. Martins, D., H. Halliday, R. Stauffer, G. Morris, A. Thompson, H. Selkirk, and R. Herman, Ozone vertical variability over Houston, NASA DISCOVER-AQ Science Team Meeting, Hampton, Virginia, 24 – 28 March 2014.
14. Morris, G.A., and B.L. Lefer, Tropospheric Ozone Pollution Project (TOPP) Overview: A context for DISCOVER-AQ Houston 2013, NASA DISCOVER-AQ Science Team Meeting, Hampton, Virginia, 24 – 28 March 2014.
17. Morris, G.A., and B. Lefer, Late summer ozonesonde observations in Houston: SEAC4RS and DISCOVER-AQ soundings (Aug. – Sept. 2013) in the context of ozonesonde observations from 2004 – 2012, NASA Air Quality Applied Science Team Meeting #6, Rice University, Houston, Texas, 15 – 17 January 2014.