 |
Louisa EmmonsSenior ScientistUCAR staff pageAtmospheric Chemistry Observations and Modeling (ACOM) Laboratory National Center for Atmospheric Research |
Biography
Louisa Emmons is a Senior Scientist in the Atmospheric Chemistry Observations and Modeling Laboratory of NCAR. Louisa received her Bachelor's Degree in Physics at Haverford College and her Master's and Ph.D. Degrees at the State University of New York at Stony Brook, also in Physics. Her graduate research focused on remote sensing measurements of stratospheric ozone depletion, using ground-based mm-wave spectroscopy to study the Antarctic ozone hole and the Arctic springtime stratosphere. Her research since then has encompassed both measurements and modeling of tropospheric chemistry, and has resulted in 138 published journal articles since starting her PhD research.
Louisa's research interests lie in the integration of measurements with models to investigate the impact of sources and their chemical evolution on tropospheric composition. This work includes the evaluation, and improvement, of models with observations, and the interpretation of observations with model results. Louisa developed the first climatologies of tropospheric ozone and its precursors based on many individual aircraft measurements and ground-based observations, which have been used to evaluate global models at NCAR and throughout the community. Louisa has also worked extensively with satellite observations of tropospheric constituents and published the first validation of the carbon monoxide (CO) retrievals from the Measurements Of Pollution In The Troposphere (MOPITT) instrument on the Terra satellite using airborne in situ measurements.
Louisa played a key role in the development of the NCAR community model MOZART (Model of OZone and Related Chemical Tracers), and led the publication and community release of Version 4 of MOZART in 2010. Real-time chemical forecasts using MOZART-4 were maintained by Louisa for many years to provide global chemical forecasts of ozone, carbon monoxide and other compounds. Louisa has been an active participant in NCAR-led field campaigns, including TOPSE, MIRAGE, DC3, NOMADSS and FRAPPE, using MOPITT and MOZART results to assist flight planning during the campaign and post-mission analysis. In addition, Louisa has successfully proposed to provide forecasting and flight planning support in several NASA field campaigns: ASIA-AQ, FIREX-AQ, KORUS-AQ, SEAC4RS, ARCTAS, INTEX-B, INTEX-A.
Current Research Activities
Publications
Publications before 2000
Emmons, L.K., D.A. Hauglustaine, J-F. Müller, M.A. Carroll, G.P. Brasseur, D. Brunner, J. Stahelin, V. Thouret, A. Marenco, Data composites of airborne observations of tropospheric ozone and its precursors, J. Geophys. Res., 105, 20,497-20,538, 2000. doi:10.1029/2000JD900232 [PDF]
Hauglustaine, D.A., G.P. Brasseur, S. Walters, P.J. Rasch, J.-F. Müller, L.K. Emmons and M.A. Carroll, MOZART: A global chemical transport model for ozone and related chemical tracers, part 2: Model results and evaluation, J. Geophys. Res., 103, 28,291-28,335, 1998.
Emmons, L.K., M.A. Carroll, D.A. Hauglustaine, G.P. Brasseur, C. Atherton, J. Penner, S. Sillman, H. Levy II, F. Rohrer, W.M.F. Wauben, P.F.J. van Velthoven, Y. Wang, D. Jacob, P. Bakwin, R. Dickerson, B. Doddridge, C. Gerbig, R. Honrath, G. Hubler, D. Jaffe, Y. Kondo, J.W. Munger, A. Torres, A. Volz-Thomas, Climatologies of NOx and NOy: A comparison of data and models, Atmos. Env., 31, 1851, 1997.
Emmons, L.K., D.T. Shindell, J.M. Reeves and R.L. de Zafra, Stratospheric ClO profiles from McMurdo Station, Antarctica, spring 1992, J. Geophys. Res., 100, 3049, 1995.
Shindell, D.T., J.M. Reeves, L.K. Emmons and R.L. de Zafra, Arctic chlorine monoxide observations during spring 1993 over Thule, Greenland, and implications for ozone depletion, J. Geophys. Res, 99, 25,697, 1994.
Emmons, L.K., J.M. Reeves, D.T. Shindell and R.L. de Zafra, N2O as an indicator of Arctic vortex dynamics: Correlations with O3 over Thule, Greenland in February and March, 1992, Geophys. Res. Lett., 21, 1275, 1994.
de Zafra, R.L., L.K. Emmons, J.M. Reeves, and D.T. Shindell, An overview of millimeter-wave spectroscopic measurements of chlorine monoxide at Thule, Greenland, February-March, 1992: Vertical profiles, diurnal variation, and long-term trends, Geophys. Res. Lett., 21, 1271, 1993.
Emmons, Louisa K. and Robert L. de Zafra, Observation of a strong inverse temperature dependence for the opacity of atmospheric water vapor in the mm continuum near 280 GHz, Int. J. IR and mm Waves, 11, 469, 1990.
de Zafra, R.L., M. Jaramillo, J. Barrett, L.K. Emmons, P.M. Solomon, and A. Parrish, New observations of large concentrations of ClO in the lower springtime stratosphere over Antarctica and its implications for ozone-depleting chemistry, J. Geophys. Res., 94, 11423, 1989.
Barrett, J.W., P.M. Solomon, R.L. de Zafra, M. Jaramillo, L. Emmons, and A. Parrish, Formation of the Antarctic ozone hole by the ClO dimer mechanism, Nature, 336, 455, 1988.
Thesis: Measurement and Analysis of Polar Stratospheric ClO and N2O by Ground-based mm-Wave Spectroscopy, (Robert L. de Zafra, advisor), 1994.