Lori A. Del Negro

Associate Professor of Chemistry

Specialization

Analytical Chemistry and Instrumental Methods
Atmospheric Chemistry:
  Air Toxics and Photochemistry
  Reactive nitrogen and halocarbon species
  Stratospheric Ozone Loss

Interests

Ozone Depletion
Climate Change
Carbon dioxide emissions inventories and mitigation
Urban Air pollution
Science writing for a general audience

Education

National Research Council Postdoctoral Fellow, NOAA Climate Monitoring and Diagnostics Laboratory

PhD, Analytical Atmospheric Chemistry, University of Colorado at Boulder
BS, Chemistry, Hartwick College

Courses Taught

Chemistry 102: Chemistry and the Environment
Chemistry 110: General Chemistry I
Chemistry 111: General Chemistry II
Chemistry 410: Instrumental Analysis
Environmental Studies 480: The Scientific, Economic, and Institutional Challenges of Alternative Energy
Environmental Studies 480: The Future of Nuclear Power in the U.S.

Articles

Comparison of Aircraft Benzene Measurements with Ground-based measurements and Emission Inventories in Houston, TX

L. A. Del Negro, C. Warneke, J.A. de Gouw, E. Atlas, X. Zhu, L. Pope, S. Schauffler, R. Hendershot, R. Washenfelder, D. Richter, J. A. Walega, P. Weibring, and A. Fried
      Environmental Science and Technology, undergoing co-author review, 2009.

Biogenic Emission Measurement and Inventories: Determination of Biogenic Emissions in the Eastern United States and Texas and Comparison with Biogenic Emission Inventories

C. Warneke, J. A. de Gouw, L. A. Del Negro, J. Brioude, S. McKeen, H. Stark, W. C. Kuster, P.D. Goldan, M. Trainer, F. C. Fehsenfeld, C. Wiedinmyer, A. B. Guenther, A. Hansel, A. Wisthaler, E. Atlas, J. S. Holloway, T.B. Ryerson, J. Peischl, L.G. Huey, A.T. Case Hanks
     Journal of Geophysical Research, in press, doi: 10.1029/2009JD012445, 2010. 

Measurement of the mixing state, mass, and optical size of individual black carbon particles in urban and biomass burning emissions

J. P. Schwarz, R. S. Gao, J. R. Spackman, L. A. Watts, D. S. Thomson, D. W. Fahey, T. B. Ryerson, J. Peischl, J. S. Holloway, M. Trainer, G. J. Frost, T. Baynard, D. A. Lack, J. A. de Gouw, C. Warneke, L. A. Del Negro
     Geophysical Research Letters, 35, doi:10.1029/2008GL033968, 2008.

JNO2 at high solar zenith angles in the lower stratosphere

R. S. Gao, L. A. Del Negro, W. H. Swartz, R. J. Salawitch, S. A. Lloyd, M. H. Proffitt, D. W. Fahey, S. G. Donnelly, J. A. Neuman, R. M. Stimpfle, T. P. Bui
Geophysical Research Letters, 28, 2405-2408, 2001.

An examination of the NOx-HNO3 system in the lower stratosphere: Insights from in situ measurements and implications of the JHNO3-[OH] relationship

K. K. Perkins, T. F. Hanisco, R. C. Cohen, L. C. Koch, R. M. Stimpfle, P. B. Voss, G. P. Bonne, E. J. Lanzendorf, J. G. Anderson, P. O. Wennberg, R.-S. Gao, L. A. Del Negro, R. J. Salawitch, C. T. McElroy, E. J. Hintsa, M. Loewenstein, and T. P. Bui
Journal of Physical Chemistry, 105, 1521-1534, 2001.

Quantitative constraints on the atmospheric chemistry of nitrogen oxides: An analysis along chemical coordinates

R. C. Cohen, K. K. Perkins, L. C. Koch, R. M. Stimpfle, P. O. Wennberg, T. F. Hanisco, E. J. Lanzendorf, G. P. Bonne, P. B. Voss, R. J. Salawitch, L. A. Del Negro, J. C. Wilson, C. T. McElroy, and T. P. Bui
Journal of Geophysical Research, 105, 24283-24304, 2000.

Ozone destruction and production rates in the spring and summer Arctic stratosphere

D. W. Fahey, R.-S. Gao, L. A. Del Negro, S. G. Donnelly, E. R. Keim, R. J. Salawitch, P. O. Wennberg, T. F. Hanisco, E. J. Lanzendorf, M. H. Proffitt, J. J. Margitan, J. C. Wilson, R. M. Stimpfle, R. C. Cohen, C. T. McElroy, C. R. Webster, M. Loewenstein, J. W. Elkins, T. P. Bui, S. A. Lloyd, S. R. Kawa, and P. A. Newman
Geophysical Research Letters, 27, 2605-2608, 2000.

Comparison of MkIV balloon and ER-2 aircraft measurements of atmospheric trace gases

G. C. Toon, J. -F. Blavier, B. Sen, J. J. Margitan, C. R. Webster, R. D. May, D. Fahey, R. Gao, L. Del Negro, M. Proffitt, J. Elkins, P. A. Romashkin, D. F. Hurst, S. Oltmanns, E. Atlas, S. Schauffler, F. Flocke, T. P. Bui, R. M. Stimpfle, G. P. Bonne, P. B. Voss, and R. C. Cohen
Journal of Geophysical Research 104, 26779-26790, 1999.

The coupling of ClONO2, ClO, and NO2 in the lower stratosphere from in situ observations using the NASA ER-2 aircraft

R. M. Stimpfle, R. C. Cohen, G. P. Bonne, P. B. Voss, K. K. Perkins, L. C. Koch, J. G. Anderson, R. J. Salawitch, S. A. Lloyd, R.-S. Gao, L. A. Del Negro, E. R. Keim, and T. P. Bui
Journal of Geophysical Research 104, 26705-26714, 1999.

Comparison of modeled and observed values of NO2 and JNO2 during the Photochemistry of Ozone Loss in the Arctic Region In Summer (POLARIS) mission

L. A. Del Negro, D. W. Fahey, R.-S. Gao, S. G. Donnelly, E. R. Keim, J. A. Neuman, R. C. Cohen, K. K. Perkins, L. C. Koch, R. J. Salawitch, S. A. Lloyd, M. H. Proffitt, J. J. Margitan, R. M. Stimpfle, G. P. Bonne, P. B. Voss, P. O. Wennberg, C. T. McElroy, W. H. Swartz, T. L. Kusterer, D. E. Anderson, L. R. Lait, and T. P. Bui
Journal of Geophysical Research 104, 26687-26704, 1999.

A comparison of observations and model simulations of NOx/NOy in the lower stratosphere

R.-S. Gao, D. W. Fahey, L. A. Del Negro, S. G. Donnelly, E. R. Keim, J. A. Neuman, E. Teverovskaia, P. O. Wennberg, T. F. Hanisco, E. J. Lanzendorf, M. H. Proffitt, J. J. Margitan, J. C. Wilson, J. W. Elkins, R. M. Stimpfle, R. C. Cohen, C. T. McElroy, T. P. Bui, R. J. Salawitch, S. S. Brown, A. R. Ravishankara, R. W. Portmann, M. K. W. Ko, D. K. Weisenstein, and P. A. Newman
Geophysical Research Letters 26, 1153-1156, 1999.

Comparison between DC-8 and ER-2 species measurements in the tropical middle troposphere: NO, NOy, O3, CO2, and N2O

A. J. Weinheimer, D. D. Montzka, T. L. Campos, J. G. Walega, B. A. Ridley, S. G. Donnelly, E. R. Keim, L. A. Del Negro, M. H. Proffitt, J. J. Margitan, K. A. Boering, A. E. Andrews, B. C. Daube, S. C. Wofsy, B. E. Anderson, J. E. Collins, G. W. Sachse, S. A. Vay, J. W. Elkins, P. R. Wamsley, E. L. Atlas, F. Flocke, S. Schauffler, C. R. Webster, R. D. May, M. Loewenstein, J. R. Podolske, T. P. Bui, K. R. Chan, S. W. Bowen, M. R. Schoeberl, L. R. Lait, and P. A. Newman
Journal of Geophysical Research 103, 22087-22096, 1998.

Hydrogen radicals, nitrogen radicals, and the production of O3 in the upper troposphere

P. O. Wennberg, T. F. Hanisco, L. Jaegle, D. J. Jacob, E. J. Hintsa, E. J. Lanzendorf, J. G. Anderson, R.-S. Gao, E. R. Keim, S. G. Donnelly, L. A. Del Negro, D. W. Fahey, S. A. McKeen, R. J. Salawitch, C. R. Webster, R. D. May, R. L. Herman, M. H. Proffitt, J. J. Margitan, E. L. Atlas, S. M. Schauffler, F. Flocke, C. T. McElroy, and T. P. Bui
Science 279, 49-53, 1998.

Evaluating the role of NAT, NAD, and liquid H2SO4/H2O/HNO3 solutions in Antarctic polar stratospheric cloud aerosol: Observations and implications

L. A. Del Negro, D. W. Fahey, S. G. Donnelly, R.-S. Gao, E. R. Keim, R. C. Wamsley, E. L. Woodbridge, J. E. Dye, D. Baumgardner, B. W. Gandrud, J. C. Wilson, H. H. Jonsson, M. Loewenstein, J. R. Podolske, C. R. Webster, R. D. May, D. R. Worsnop, A. Tabazadeh, M. A. Tolbert, K. K. Kelly, and K. R. Chan
Journal of Geophysical Research 102, 13255-13282, 1997.

Measurements of the NOy-N2O correlation in the lower stratosphere: Latitudinal and seasonal changes and model comparisons

E. R. Keim, M. Loewenstein, J. R. Podolske, D. W. Fahey, R.-S. Gao, E. L. Woodbridge, R. C. Wamsley, S. G. Donnelly, L. A. Del Negro, C. D. Nevison, S. Solomon, K. H. Rosenlof, C. J. Scott, M. K. W. Ko, D. Weisenstein, and K. R. Chan
Journal of Geophysical Research 102, 13193-13212, 1997.

Influence of Antarctic denitrification on two-dimensional model NOy/N2O correlations in the lower stratosphere

C. D. Nevison, S. Solomon, R. R. Garcia, D. W. Fahey, E. R. Keim, M. Loewenstein, J. R. Podolske, R.-S. Gao, R. C. Wamsley, S. G. Donnelly, and L. A. Del Negro
Journal of Geophysical Research 102, 13183-13192, 1997.

Partitioning of the reactive nitrogen reservoir in the lower stratosphere of the southern hemisphere: Observations and modeling

R.-S. Gao, D. W. Fahey, R. J. Salawitch, S. A. Lloyd, D. E. Anderson, R. DeMajistre, C. T. McElroy, E. L. Woodbridge, R. C. Wamsley, S. G. Donnelly, L. A. Del Negro, M. H. Proffitt, R. M. Stimpfle, D. W. Kohn, S. R. Kawa, L. R. Lait, M. Loewenstein, J. R. Podolske, E. R. Keim, J. E. Dye, J. C. Wilson, and K. R. Chan
Journal of Geophysical Research 102, 3935-3949, 1997.

The role of HOx in super- and subsonic aircraft exhaust plumes

T. F. Hanisco, P. O. Wennberg, R. C. Cohen, J. G. Anderson, D. W. Fahey, E. R. Keim, R.-S. Gao, R. C. Wamsley, S. G. Donnelly, L. A. Del Negro, R. J. Salawitch, K. K. Kelly, and M. H. Proffitt
Geophysical Research Letters 24, 65-68, 1997.

Observations of large reductions in the NO/NOy ratio near the mid-latitude tropopause and the role of heterogeneous chemistry

E. R. Keim, D. W. Fahey, L. A. Del Negro, E. L. Woodbridge, R.-S. Gao, P.O. Wennberg, R. C. Cohen, R. M. Stimpfle, K. K. Kelly, E. J. Hintsa, J. C. Wilson, H. H. Jonsson, J. E. Dye, D. Baumgardner, S. R. Kawa, R. J. Salawitch, M. H. Proffitt, M. Loewenstein, J. R. Podolske, and K. R. Chan
Geophysical Research Letters 23, 3223-3226, 1996.

In-situ observations of an Antarctic polar stratospheric cloud: Similarities with Arctic observations

J. E. Dye, D. Baumgardner, B. W. Gandrud, K. Drdla, K. Barr, D. W. Fahey, L. A. Del Negro, A. Tabazadeh, H. H. Jonsson, J. C. Wilson, M. Loewenstein, J. R. Podolske, and K. R. Chan
Geophysical Research Letters 23, 1913-1916. 1996.

In situ observations of NOy, O3, and the NOy/O3 ratio in the lower stratosphere

D. W. Fahey, S. G. Donnelly, E. R. Keim, R.-S. Gao, R. C. Wamsley, L. A. Del Negro, E. L. Woodbridge, M. H. Proffitt, K. H. Rosenlof, M. K. W. Ko, D. K. Weisenstein, C. J. Scott, C. Nevison, S. Solomon, and K. R. Chan
Geophysical Research Letters 23, 1653-1656, 1996.

Emission measurements of the Concorde supersonic aircraft in the lower stratosphere

D. W. Fahey, E. R. Keim, K. A. Boering, C. A. Brock, J. C. Wilson, H. H. Jonsson, S. Anthony, T. F. Hanisco, P. O. Wennberg, R. C. Miake-Lye, R. J. Salawitch, N. Louisnard, E. L. Woodbridge, R.-S. Gao, S. G. Donnelly, R. C. Wamsley, L. A. Del Negro, S. Solomon, B. C. Daube, S. C. Wofsy, C. R. Webster, R. D. May, K. K. Kelly, M. Loewenstein, J. R. Podolske, and K. R. Chan
Science 270, 70-74, 1995.

Invited Talks

“Preliminary Attempts to Identify Plume VOC sources in the Houston Ship Channel,” TexAQS 2006/GoMACCS Rapid Science Synthesis Meeting, Houston, TX, September 2006. “Studying the Chemistry and Physics of the Atmosphere,” Peggy Notebaert Nature Museum and Chicago Botanic Garden 2005 Teens Career Fair, Chicago, IL, April 2005. “Five Things to Know About Climate Change,” Boys & Girls Club of Fox Valley Earth Day Presentation, Appleton, WI, April 2004.

“Solutions: What’s Being Done About Global Warming.  Examples from a corporation, a community, and a college - how people and ideas can turn the corner on the greatest threat humans have ever faced…,” interview for DVD produced by Clean Air - Cool Planet with major funding provided by the Alida R. Messenger Charitable Lead Trust and additional support from the Emily Hall Tremaine Foundation, the Henry P. Kendall Foundation, and the New York Community Trust, copyright 2002.

“Dow Chemical, Dr. Seuss, Nike, and Environmental Molecular Design,” Middlebury College Howard E. Woodin Environmental Studies Colloquium Series, Middlebury, VT, September 2002.

“Verifying the steady state between NO and NO2: a small piece in the big picture of stratospheric ozone loss,” Hartwick College Chemistry Club and Department of Chemistry, Oneonta, NY, September 1999.

“Comparison of modeled and observed values of NO2 and JNO2 during the POLARIS mission,” Atmospheric Chemistry Colloquium for Emerging Senior Scientists (ACCESS), Univerisity of Rhode Island, Kingston, RI, June 1999.

“The photochemistry of reactive nitrogen in the high latitude summer stratosphere,” University of Colorado/CIRES Atmospheric Chemistry Symposium, Boulder, CO, November 1997.

“Evaluating the composition and reactivity of aerosols in the lower stratosphere using aircraft measurements,” Annual Conference of the Federation of Analytical Chemistry and Spectroscopy Societies, Providence, RI, October 1997.

Posters

“Concentrations of Benzene and Other Air Toxics Encountered in the Vicinity of Houston, TX,”  L.A. Del Negro, J. A. deGouw, C. Warneke, TexAQS II Principal Findings Data Analysis Workshop, Austin, TX, May 2007.

“Emissions of HCFC-141b from newly constructed buildings on the Middlebury College Campus,” M. Douglas Dagan and L.A. Del Negro, Council on Undergraduate Research “Posters on the Hill” symposium, Washington, DC, April 2003.

“Production of methyl halides in Vermont Soils,” Michelle F. Clasquin and L.A. Del Negro, 225th National Meeting of the American Chemical Society, New Orleans, LA, March 2003.

“Comparison of modeled and observed values of NO2 and JNO2 during the POLARIS mission,” Atmospheric Chemistry Gordon Research Conference, Salve Regina University, Newport, RI, June 1999.

“Characterization of the NO2 steady-state assumption using POLARIS observations,” STRAT/OMS/POLARIS Science Team Meeting, Snowmass, CO, June 1998.

“Reactive nitrogen observations at high latitudes in summer,” Spring Meeting of the American Geophysical Union, Boston, MA, May 1998.

“In-situ measurements of NO2 in POLARIS: Changes within the reactive nitrogen reservoir,” Fall Meeting of the American Geophysical Union, San Francisco, CA, December 1997.

“NAT, NAD, and liquid STS in Antarctic PSC aerosol,” Quadrennial Ozone Symposium, L’Aquila, Italy, September 1996.

Awards and Honors

National Aeronautics and Space Administration Group Achievement Award, Photochemistry of Ozone Loss in the Arctic Region In Summer (POLARIS) Project Team, Washington, D.C., May 1998.

American Geophysical Union Outstanding Student Presentation Award, AGU 1997 Fall Meeting, San Francisco, CA, December 1997.

Environmental Research Laboratories of the National Oceanic and Atmospheric Administration and United States Department of Commerce Outstanding Scientific Paper Award for “Emission measurements of the Concorde supersonic aircraft in the lower stratosphere” (Science, 270, 70-74, 1995), December 1995.

National Aeronautics and Space Administration Group Achievement Award, Airborne Southern Hemisphere Ozone Experiment/Measurements for Assessing the Effects of Stratospheric Aircraft (ASHOE/MAESA) Experiment Team, Washington, D.C., March 1995.