Andrew Gettelman

General Information

ACD - TIIMES - CGD
Project Scientist
UTLS

Contact Information:
PO Box 3000, Boulder, CO 80307-3000
Office: ML - 300b & FL0-2162
Tel: 303-497-1887
Email: andrew@ucar.edu
Home Page - Vita

Research Focus FY08:

My work focuses on the upper troposphere and lower stratosphere, and extends into understanding the representation of clouds of all types in the atmosphere, especially ice and mixed clouds. This region of the atmosphere sets the chemical boundary conditions of the stratosphere (with impacts on the stratospheric ozone layer) and also is important for the impact of clouds and water vapor in this region on the earth's energy balance (and hence climate). My work encompasses both models and measurements. I work extensively with observations and simulation of ice and mixed phase clouds, and have been also working on understanding aerosol indirect effects for liquid and ice clouds.

Community Service FY08:

• Assistant Editor-Special Session: Journal of Geophysical Research - Atmospheres
• Member: Atmospheric Chemistry and Climate, Stratospheric Processes And their Role in Climate (SPARC)
• Communications secretary: Atmospheric Sciences Execuctive Committee, American Geophysical Union (AGU)
• Co-coordinator: Chemistry Climate Model Validation Activity (CCMVal), Stratospheric Processes And their Role in Climate (SPARC)
• Member: Middle Atmosphere Committee, American Meteorological Society (AMS)
• Member: Steering Committee: Atmospheric Chemistry and Climate Project, Stratospheric Processes And their Role in Climate (SPARC) - International Global Atmospheric Chemistry (IGAC)
• Coordinator: Tropopause Initiative, Stratospheric Processes And their Role in Climate (SPARC)
• Graduate Research Advisor & Thesis Committee: Qiong Yang, University of Washington, Seattle, WA

Scientific Talks FY08:

• Evaluation of Coupled Chemistry-Climate Models in the Upper Troposphere and Lower Stratosphere (Boulder, CO, January 2008)
• Structure of the Tropical Tropopause Layer and processes that maintain the TTL (San Francisco, CA, December 2007)
• The impact of supersaturation on climate and chemistry (Boulder, CO, March 2008)
• The tropical tropopause layer and the impact of supersaturation on the atmosphere (Munich, Germany, January 2008)
• The tropical tropopause layer and the impact of supersaturation on the atmosphere (Boulder, CO, April 2008)

Publications FY08 (abstracts):

Latham, J., P. J. Rasch, C.-C. Chen, L. Kettles, A. Gadian, A. Gettelman, H. Morrison, S. Salter, 2008: Global temperature stabilization via controlled albedo enhancement of low-level maritime clouds. Phil. Trans. R. Soc. A. (Accepted)4

Burkhardt, U., B. Kaercher, M. Ponater, K. Gierens, A. Gettelman, 2008: Contrail cirrus supporting areas in model and observations. Geophys. Res. Lett., 35, L16808, doi: 10.1029/2008GL034056.3

Field, P. R., A. Gettelman, R. B. Neale, R. Wood, P. J. Rasch, H. Morrison, 2008: Midlatitude cyclone compositing to constrain climate model behavior using satellite observations. J. Climate, doi: 10.1175/2008JCLI2235.1. (In Press)2

Morrison, H., A. Gettelman, 2008: A new two-moment bulk stratiform cloud microphysics scheme in the Community Atmosphere Model, version 3 (CAM3). Part I: Description and numerical tests. J. Climate, 21, 3642-3659, doi: 10.1175/2008JCLI2105.1.1

Gettelman, A., H. Morrison, S. J. Ghan, 2008: A new two-moment bulk stratiform cloud microphysics scheme in the Community Atmosphere Model, Version 3 (CAM3). Part II: Single-column and global results. J. Climate, 21, 3660-3679, doi: 10.1175/2008JCLI2116.1.3

Gettelman, A., Q. Fu, 2008: Observed and Simulated Upper-Tropospheric Water Vapor Feedback. J. Climate, 21, 3282-3289, doi: 10.1175/2007JCLI2142.1.2

Kahn, B. H., C. K. Liang, A. Eldering, A. Gettelman, Q. Yue, K. N. Liou, 2008: Tropical thin cirrus and relative humidity observed by the Atmospheric Infrared Sounder. Atmos. Chem. Phys., 8, 1501-1518.4

Kay, J. E., A. Gettelman, G. Stephens, 2008: The contribution of cloud and radiation anomalies to the 2007 Arctic sea ice extent minimum. Geophys. Res. Lett., 35, L08503, doi: 10.1029/2008GL033451.2

Ryoo, J., D. W. Waugh, A. Gettelman, 2008: Variability of subtropical upper tropospheric humidity. Atmos. Chem. Phys. Discuss., 8, 1041-1067.4

Gettelman, A., T. Birner, V. Eyring, H. Akiyoshi, D. A. Plummer, M. Dameris, S. Bekki, F. Lefevre, F. Lott, C. Bruhl, K. Shibata, E. Rozanov, E. Mancini, G. Pitari, H. Struthers, W. Tian, D. E. Kinnison, 2008: The Tropical Tropopause Layer 1960-2100. Atmos. Chem. Phys. Discuss., 8, 1367-1413.4

Gettelman, A., T. Birner, 2007: Insights into Tropical Tropopause Layer processes using global models. J. Geophys. Res., 112, D23104, doi: 10.1029/2007JD008945.2

Nassar, R., P. F. Bernath, C. D. Boone, A. Gettelman, S. D. McLeod, C. P. Rinsland, 2008: Variability in HDO/H2O abundance ratios in the tropical tropopause layer. J. Geophys. Res., 112, D21305, doi: 10.1029/2007JD008417.4

Kinnison, D. E., G. P. Brasseur, S. Walters, R. R. Garcia, D. R. Marsh, F. Sassi, V. L. Harvey, C. E. Randall, L. Emmons, J.-F. Lamarque, P. Hess, J. J. Orlando, X. X. Tie, W. Randel, L. L. Pan, A. Gettelman, C. Granier, T. Diehl, U. Niemeier, A. J. Simmons, 2007: Sensitivity of chemical tracers to meteorological parameters in the MOZART-3 chemical transport model. J. Geophys. Res., 112, D20302, doi: 10.1029/2006JD007879.4