Select Publications

  • Zhang, L., et al., Characterizing sources of high surface ozone events in the southwestern US with intensive field measurements and two global models. Atmospheric Chemistry and Physics, 2020. 20(17): p. 10379-10400.
  • Senff, C., et al., Entrainment and Mixing of Transported Ozone Layers: Implications for Surface Air Quality in the Western Us. 29th International Laser Radar Conference (Ilrc 29), 2020. 237.
  • Langford, A.O., et al., Ozone Production in the Soberanes Smoke Haze: Implications for Air Quality in the San Joaquin Valley During the California Baseline Ozone Transport Study. Journal of Geophysical Research-Atmospheres, 2020. 125(11).
  • Kuang, S., et al., Evaluation of UV aerosol retrievals from an ozone lidar. Atmospheric Measurement Techniques, 2020. 13(10): p. 5277-5292.
  • Faloona, I.C., et al., The California Baseline Ozone Transport Study (CABOTS). Bulletin of the American Meteorological Society, 2020. 101(4): p. E427-E445.
  • Breeden, M.L., et al., The Spring Transition of the North Pacific Jet and its Relation to Deep Stratosphere-to-Troposphere Mass Transport over Western North America. Atmos. Chem. Phys. Discuss., 2020. 2020: p. 1-27.
  • Albers, J.R., et al., Subseasonal prediction of springtime Pacific-North American transport using upper-level wind forecasts. Weather Clim. Dynam. Discuss., 2020. 2020: p. 1-33.
  • Langford, A.O. and C. Senff, Lidar profiling of ozone above the central San Joaquin Valley during the California Baseline Ozone Transport Study (CABOTS), Final Report Contract No. 15RD012 2019, California Air Resources Board: Sacramento, CA.
  • Langford, A.O., et al., Intercomparison of lidar, aircraft, and surface ozone measurements in the San Joaquin Valley during the California Baseline Ozone Transport Study (CABOTS). Atmos. Meas. Tech., 2019. 12(3): p. 1889-1904.
  • Caicedo, V., et al., Bay Breeze and Sea Breeze Circulation Impacts on the Planetary Boundary Layer and Air Quality From an Observed and Modeled DISCOVER-AQ Texas Case Study. Journal of Geophysical Research-Atmospheres, 2019. 124(13): p. 7359-7378.
  • Leblanc, T., et al., Validation of the TOLNet lidars: the Southern California Ozone Observation Project (SCOOP). Atmos. Meas. Tech., 2018. 11(11): p. 6137-6162.
  • Langford, A.O., et al., Coordinated profiling of stratospheric intrusions and transported pollution by the Tropospheric Ozone Lidar Network (TOLNet) and NASA Alpha Jet Atmospheric eXperiment (AJAX): Observations and comparison to HYSPLIT, RAQMS, and FLEXPART. Atmos. Environ., 2018. 174: p. 1-14.
  • Jaffe, D.A., et al., Scientific assessment of background ozone over the U.S.: Implications for air quality management. Elem Sci Anth., 2018. 6(1).
  • Albers, J.R., et al., Mechanisms Governing Interannual Variability of Stratosphere-to-Troposphere Ozone Transport. Journal of Geophysical Research-Atmospheres, 2018. 123(1): p. 234-260.
  • Wang, L.H., et al., Quantifying TOLNet ozone lidar accuracy during the 2014 DISCOVER-AQ and FRAPPE campaigns. Atmospheric Measurement Techniques, 2017. 10(10): p. 3865-3876.
  • Langford, A.O., et al., Entrainment of stratospheric air and Asian pollution by the convective boundary layer in the southwestern U.S. J. Geophys. Res., 2017. 122(2): p. 1312-1337.
  • Sullivan, J.T., et al., Quantifying the contribution of thermally driven recirculation to a high-ozone event along the Colorado Front Range using lidar. Journal of Geophysical Research-Atmospheres, 2016. 121(17): p. 10377-10390.
  • Senff, C.J., et al., Using Ozone Lidar to Investigate Sources of High Ozone Concentrations in the Western United States. 27th International Laser Radar Conference (Ilrc 27), 2016. 119.
  • Ott, L.E., et al., Frequency and impact of summertime stratospheric intrusions over Maryland during DISCOVER-AQ (2011): New evidence from NASA's GEOS-5 simulations. Journal of Geophysical Research-Atmospheres, 2016. 121(7): p. 3687-3706.
  • Newchurch, M.J., et al., TOLNet - A Tropospheric Ozone Lidar Profiling Network for Satellite Continuity and Process Studies. 27th International Laser Radar Conference (Ilrc 27), 2016. 119.
  • Min, K.E., et al., A broadband cavity enhanced absorption spectrometer for aircraft measurements of glyoxal, methylglyoxal, nitrous acid, nitrogen dioxide, and water vapor. Atmospheric Measurement Techniques, 2016. 9(2): p. 423-440.
  • McDuffie, E.E., et al., Influence of oil and gas emissions on summertime ozone in the Colorado Northern Front Range. Journal of Geophysical Research-Atmospheres, 2016. 121(14): p. 8712-8729.
  • Lin, M.Y., et al., Climate variability modulates western US ozone air quality in spring via deep stratospheric intrusions. Nat. Comm., 2015. 6.
  • Langford, A.O., et al., An overview of the 2013 Las Vegas Ozone Study (LVOS): Impact of stratospheric intrusions and long-range transport on surface air quality. Atmos. Environ., 2015. 109: p. 305-322.
  • Langford, A.O., R.B. Pierce, and P.J. Schultz, Stratospheric intrusions, the Santa Ana winds, and wildland fires in Southern California. Geophys. Res. Lett., 2015. 42(14): p. 6091-6097.
  • Cooper, O.R., et al., Challenges of a lowered US ozone standard. Science, 2015. 348(6239): p. 1096-1097.
  • Baidar, S., et al., Weakening of the weekend ozone effect over California's South Coast Air Basin. Geophysical Research Letters, 2015. 42(21): p. 9457-9464.
  • Ahmadov, R., et al., Understanding high wintertime ozone pollution events in an oil- and natural gas-producing region of the western US. Atmospheric Chemistry and Physics, 2015. 15(1): p. 411-429.
  • Edwards, P.M., et al., High winter ozone pollution from carbonyl photolysis in an oil and gas basin. Nature, 2014. 514(7522): p. 351-+.
  • Ryerson, T.B., et al., The 2010 California Research at the Nexus of Air Quality and Climate Change (CalNex) field study. J. Geophys. Res., 2013. 118(11): p. 5830-5866.
  • Berlin, S.R., et al., Magnitude, Decadal Changes, and Impact of Regional Background Ozone Transported into the Greater Houston, Texas, Area. Environmental Science & Technology, 2013. 47(24): p. 13985-13992.
  • Baidar, S., et al., Combining Active and Passive Airborne Remote Sensing to Quantify NO2 and Ox Production near Bakersfield, CA. British Journal of Environment & Climate Change, 2013. 3(4): p. 566-586.
  • Zaveri, R.A., et al., Overview of the 2010 Carbonaceous Aerosols and Radiative Effects Study (CARES). Atmospheric Chemistry and Physics, 2012. 12(16): p. 7647-7687.
  • Lin, M.Y., et al., Springtime high surface ozone events over the western United States: Quantifying the role of stratospheric intrusions. J. Geophys. Res., 2012. 117: p. D00v22.
  • Langford, A.O., et al., Stratospheric influence on surface ozone in the Los Angeles area during late spring and early summer of 2010. J. Geophys. Res., 2012. 117: p. D00V06.
  • Langford, A.O., et al., Comparison between the TOPAZ Airborne Ozone Lidar and In Situ Measurements during TexAQS 2006. J. Atmos. Ocean. Tech., 2011. 28(10): p. 1243-1257.
  • Banta, R.M., et al., Dependence of daily peak O-3 concentrations near Houston, Texas on environmental factors: Wind speed, temperature, and boundary-layer depth. Atmospheric Environment, 2011. 45(1): p. 162-173.
  • Alvarez, R.J., II, et al., Development and Application of a Compact, Tunable, Solid-State Airborne Ozone Lidar System for Boundary Layer Profiling. J. Atmos. Ocean Tech., 2011. 28(10): p. 1258-1272.
  • Tucker, S.C., et al., Relationships of coastal nocturnal boundary layer winds and turbulence to Houston ozone concentrations during TexAQS 2006. Journal of Geophysical Research-Atmospheres, 2010. 115.
  • Senff, C.J., et al., Airborne lidar measurements of ozone flux downwind of Houston and Dallas. J. Geophys. Res., 2010. 115: p. D20307.
  • Langford, A.O., et al., Convective venting and surface ozone in Houston during TexAQS 2006. Journal of Geophysical Research-Atmospheres, 2010. 115.
  • Langford, A.O., et al., Long-range transport of ozone from the Los Angeles Basin: A case study. Geophys. Res. Lett., 2010. 37: p. L06807.
  • Langford, A.O., et al., Regional and local background ozone in Houston during Texas Air Quality Study 2006. Journal of Geophysical Research-Atmospheres, 2009. 114.
  • Langford, A.O., et al., Stratospheric contribution to high surface ozone in Colorado during springtime. Geophys. Res. Lett., 2009. 36: p. doi:10.1029/2009GL038367.
  • Washenfelder, R.A., et al., Measurement of glyoxal using an incoherent broadband cavity enhanced absorption spectrometer. Atmospheric Chemistry and Physics, 2008. 8(24): p. 7779-7793.
  • Melamed, M.L., et al., Sulfur dioxide emission flux measurements from point sources using airborne near ultraviolet spectroscopy during the New England Air Quality Study 2004. Journal of Geophysical Research-Atmospheres, 2008. 113(D2).
  • Schofield, R., et al., Retrieval of effective radius and liquid water path from ground-based instruments: A case study at Barrow, Alaska. Journal of Geophysical Research-Atmospheres, 2007. 112(D21).
  • Langford, A.O., et al., On the variability of the Ring effect in the near ultraviolet: understanding the role of aerosols and multiple scattering. Atmospheric Chemistry and Physics, 2007. 7: p. 575-586.
  • Schwarz, J.P., et al., Single-particle measurements of midlatitude black carbon and light-scattering aerosols from the boundary layer to the lower stratosphere. Journal of Geophysical Research-Atmospheres, 2006. 111(D16).
  • Daniel, J.S., et al., Cloud property estimates from zenith spectral measurements of scattered sunlight between 0.9 and 1.7 mu m. Journal of Geophysical Research-Atmospheres, 2006. 111(D16).
  • Langford, A.O., et al., Retrieval of ice crystal effective diameters from ground-based near-infrared spectra of optically thin cirrus. Journal of Geophysical Research-Atmospheres, 2005. 110(D22).
  • Sierk, B., et al., Field measurements of water vapor continuum absorption in the visible and near-infrared. Journal of Geophysical Research-Atmospheres, 2004. 109(D8).
  • Langford, A.O., et al., Spectroscopic measurements of NO2 in a Colorado thunderstorm: Determination of the mean production by cloud-to-ground lightning flashes. Journal of Geophysical Research-Atmospheres, 2004. 109(D11).
  • Sierk, B., et al., Field test of spectral line intensity parameters for tropospheric water vapor. Journal of Geophysical Research-Atmospheres, 2003. 108(D12).
  • Melamed, M.L., et al., Measuring reactive nitrogen emissions from point sources using visible spectroscopy from aircraft. Journal of Environmental Monitoring, 2003. 5(1): p. 29-34.
  • Hawes, A.K., et al., Airborne observations of vegetation and implications for biogenic emission characterization. Journal of Environmental Monitoring, 2003. 5(6): p. 977-983.
  • Daniel, J.S., et al., Retrieving cloud information from passive measurements of solar radiation absorbed by molecular oxygen and O-2-O-2. Journal of Geophysical Research-Atmospheres, 2003. 108(D16).
  • Solomon, S., et al., Reactive nitrogen emissions from point sources in Houston using visible spectroscopy measurements from aircraft. Fourth Conference on Atmospheric Chemistry: Urban, Regional and Global Scale Impacts of Air Pollutants, 2002: p. 254-257.
  • Daniel, J.S., et al., Cloud liquid water and ice measurements from spectrally resolved near-infrared observations: A new technique. Journal of Geophysical Research-Atmospheres, 2002. 107(D21).
  • Langford, A.O., Stratosphere-troposphere exchange at the subtropical jet: contribution to the tropospheric ozone budget at midlatitudes. Geophys. Res. Lett., 1999. 26(16): p. 2449-2452.
  • Proffitt, M.H. and A.O. Langford, Tropospheric ozone measurements at a mid-latitude site using the RTD-DIAL technique. Optical Remote Sensing for Industry and Environmental Monitoring, 1998. 3504: p. 165-173.
  • Langford, A.O. and S.J. Reid, Dissipation and mixing of a small-scale stratospheric intrusion in the upper troposphere. J. Geophys. Res., 1998. 103(D23): p. 31265-31276.
  • Langford, A.O., et al., Modulation of middle and upper tropospheric ozone at northern midlatitudes by the El Nino Southern Oscillation. Geophys. Res. Lett., 1998. 25(14): p. 2667-2670.
  • Langford, A.O., et al., Rapid profiling of ozone in a tropopause fold following a cut-off low event, in Atmospheric Ozone, R.D. Bojkov and G. Visconti, Editors. 1998, Parco Scientifico e Technologico d'Abruzzo: L'Aquila. p. 143-146.
  • Proffitt, M.H. and A.O. Langford, Ground-based differential absorption lidar system for day or night measurements of ozone throughout the free troposphere. Applied Optics, 1997. 36(12): p. 2568-2585.
  • Langford, A.O., et al., Correction to "Ozone measurements in a tropopause fold associated with a cut-off low system". J. Geophys. Res., 1997. 24(1): p. 109.
  • Langford, A.O., et al., Modulation of tropospheric ozone by a propagating gravity wave. J. Geophys. Res., 1996. 101(D21): p. 26605-26613.
  • Langford, A.O., et al., Ozone measurements in a tropopause fold associated with a cut-off low system. Geophysical Research Letters, 1996. 23(18): p. 2501-2504.
  • Lamarque, J.F., A.O. Langford, and M.H. Proffitt, Cross-tropopause mixing of ozone through gravity wave breaking: Observation and modeling. Journal of Geophysical Research-Atmospheres, 1996. 101(D17): p. 22969-22976.
  • Proffitt, M.H. and A.O. Langford, Profiling of ozone in the free troposphere by the lidar technique. Rev. Laser Eng., 1995. 23(2): p. 104-107.
  • 71. Langford, A.O., et al., Transport of the Pinatubo Volcanic Aerosol to a Northern Midlatitude Site. Journal of Geophysical Research-Atmospheres, 1995. 100(D5): p. 9007-9016.
  • Langford, A.O., Identification and correction of analog-to-digital-converter nonlinearities and their implications for differential absorption lidar measurements. Applied Optics, 1995. 34(36): p. 8330-8340.
  • Hofmann, D.J., et al., Ozone Loss in the Lower Stratosphere over the United-States in 1992-1993 - Evidence for Heterogeneous Chemistry on the Pinatubo Aerosol. Geophysical Research Letters, 1994. 21(1): p. 65-68.
  • Mills, M.J., et al., On the Relationship between Stratospheric Aerosols and Nitrogen-Dioxide. Geophysical Research Letters, 1993. 20(12): p. 1187-1190.
  • Williams, E.J., et al., An Intercomparison of 5 Ammonia Measurement Techniques. Journal of Geophysical Research-Atmospheres, 1992. 97(D11): p. 11591-11611.
  • Post, M.J., et al., Observations of Pinatubo Ejecta over Boulder, Colorado by Lidars of 3 Different Wavelengths. Geophysical Research Letters, 1992. 19(2): p. 195-198.
  • Langford, A.O., et al., Gaseous Ammonia Fluxes and Background Concentrations in Terrestrial Ecosystems of the United States. Global Biogeochemical Cycles, 1992. 6(4): p. 459-483.
  • Langford, A.O. and F.C. Fehsenfeld, Natural Vegetation as a Source or Sink for Atmospheric Ammonia - a Case-Study. Science, 1992. 255(5044): p. 581-583.
  • Proffitt, M.H. and A.O. Langford, Measuring Tropospheric Ozone Using Differential Absorption Lidar Technique. Remote Sensing of Atmosphere Chemistry, 1991. 1491: p. 2-6.
  • Fehsenfeld, F.C., et al., Intercomparison of NO2 Measurement Techniques. Journal of Geophysical Research-Atmospheres, 1990. 95(D4): p. 3579-3597.
  • Langford, A.O., P.D. Goldan, and F.C. Fehsenfeld, A Molybdenum Oxide Annular Denuder System for Gas-Phase Ambient Ammonia Measurements. Journal of Atmospheric Chemistry, 1989. 8(4): p. 359-376.
  • Roberts, J.M., et al., Ammonia Measurements at Niwot Ridge, Colorado and Point Arena, California Using the Tungsten-Oxide Denuder Tube Technique. Journal of Atmospheric Chemistry, 1988. 7(2): p. 137-152.
  • Fehsenfeld, F.C., et al., A Ground-Based Intercomparison of No, Nox, and Noy Measurement Techniques. Journal of Geophysical Research-Atmospheres, 1987. 92(D12): p. 14710-14722.
  • Dressler, R.A., et al., Direct Observation of Ba+ Velocity Distributions in a Drift Tube Using Single-Frequency Laser-Induced Fluorescence. Journal of Chemical Physics, 1987. 87(9): p. 5578-5579.
  • Langford, A.O., V.M. Bierbaum, and S.R. Leone, Branching Ratios for Electronically Excited Oxygen-Atoms Formed in the Reaction of N+ with O2 at 300-K. Journal of Chemical Physics, 1986. 84(4): p. 2158-2166.
  • Langford, A.O., V.M. Bierbaum, and S.R. Leone, Auroral Implications of Recent Measurements on O(1S) and O(1D) Formation in the Reaction of N+ with O-2. Planetary and Space Science, 1985. 33(10): p. 1225-1228.
  • Langford, A.O., V.M. Bierbaum, and S.R. Leone, Flowing Afterglow Infrared Chemi-Luminescence Studies of Vibrational-Energy Disposal in the Ion Molecule Reactions F-+Hbr,Dbr-]Hf,Df+Br-. Journal of Chemical Physics, 1985. 83(8): p. 3913-3918.
  • Langford, A.O. and C.B. Moore, Collision Complex-Formation in the Reactions of Formyl Radicals with Nitric-Oxide and Oxygen. Journal of Chemical Physics, 1984. 80(9): p. 4211-4221.
  • Langford, A.O. and C.B. Moore, Reaction and Relaxation of Vibrationally Excited Formyl Radicals. Journal of Chemical Physics, 1984. 80(9): p. 4204-4210.
  • Langford, A.O., H. Petek, and C.B. Moore, Collisional Removal of CH2(1a1) - Absolute Rate Constants for Atomic and Molecular Collisional Partners at 295 K. Journal of Chemical Physics, 1983. 78(11): p. 6650-6659.
  • Ravishankara, A.R., P.H. Wine, and A.O. Langford, Absolute Rate Constant for the Reaction Oh+HBr=H2O+Br. Chemical Physics Letters, 1979. 63(3): p. 479-484.
  • Ravishankara, A.R., P.H. Wine, and A.O. Langford, Absolute Rate Constant for the Reaction OH(v=0)+O3=HO2+O2 over the Temperature-Range 238-Degrees-K-357-Degrees-K. Journal of Chemical Physics, 1979. 70(2): p. 984-989.