Department of Climate and Space Sciences and Engineering in the College of Engineering at the University of Michigan


Gretchen Keppel-Aleks
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Gretchen Keppel-Aleks

Assistant Professor

Office: 2516 SRB
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PhD California Institute of Technology; Environmental Science and Engineering 

MS California Institute of Technology; Environmental Science and Engineering

SB Massachusetts Institute of Technology; Chemical Engineering 


  • Carbon cycle-climate interactions
  • Remote sensing of atmospheric trace gases and vegetation properties
  • Earth System modeling
  • Atmospheric tracer transport

Honors, Awards and Accomplishments

NOAA Climate and Global Change Postdoctoral Fellowship, 2011-2013
American Association of University Women dissertation fellowship, 2009-2010
NSF Graduate Research Fellowship, 2006-2009
Vito Vanoni Graduate Fellowship, 2004-2005

Professional Service

Member of the American Geophysical Union


Selected Publications

Keppel-Aleks, G., J. T. Randerson, K. Lindsay, B. B. Stephens, J. K. Moore, S. C. Doney, P. E. Thornton, N. M. Mahowald, F. M. Hoffman, C. Sweeney, P. P. Tans, P. O. Wennberg, S. C. Wofsy: Atmospheric carbon dioxide variability in the Community Earth System Model: Evaluation and transient dynamic during the 20th and 21st centuries, J. Climate, 26, 4447-4475, 2013.

Keppel-Aleks, G., P. O. Wennberg, C. W. O’Dell, and D. Wunch: Towards constraints on fossil fuel emis- sions from total column carbon dioxide, Atmos. Chem. Phys. 13, 4349-4357, 2013.

Keppel-Aleks, G., P.O. Wennberg, T. Schneider, R.A. Washenfelder, D. Wunch, G.C. Toon, R.J. Andres, J.-F. Blavier, B. Connor, K.J. Davis, A.R. Desai, J. Messerschmidt, J. Notholt, C.M. Roehl, V. Sherlock, B.B. Stephens, S.A. Vay, and S.C. Wofsy: The imprint of surface fluxes and atmospheric transport on variations in total column carbon dioxide, Biogeosciences, 9, 875–891, 2012.

Wunch, D., P.O. Wennberg, G.C. Toon, B.J. Connor, B. Fisher, G.B. Osterman, C. Frankenberg, L. Man- drake, C. O’Dell, P. Ahonen, S.C. Biraud, R. Casano, N. Cressie, D. Crisp, N.M. Deutscher, A. Eldering, M.L. Fisher, D.W.T. Griffith, M. Gunson, P. Heikkinen, G. Keppel-Aleks, E. Kyro, R. Lindenmaier, R. Macatangay, J. Messerschmidt, C.E. Miller, I. Morino, J. Notholt, F.A. Oyafuso, M. Rettinger, J. Robin- son, C.M. Roehl, R.J. Salawitch, V. Sherlock, K. Strong, R. Sussmann, T. Tanaka, D.R. Thompson, O. Uchino, T. Warneke, and S.C. Wofsy: A method for evaluating bias in global measurements of CO2 from space, Atmos. Chem. Phys, 11, 12317–12337, 2011. 

Keppel-Aleks, G., P.O. Wennberg, and T. Schneider: Sources of variations in total column carbon dioxide, Atmos. Chem. Phys., 11, 3581–3593, 2011.

Wunch, D., G.C. Toon, P.O. Wennberg, S.C. Wofsy, B. B. Stephens, M.L. Fischer, O. Uchino, J.B. Abshire, P. Bernath, S.C. Biraud, J.F. Blavier, C. Boone, K.P. Bowman, E.V. Browell, T. Campos, B.J. Connor, B.C. Daube, N.M. Deutscher, M. Diao, J.W. Elkins, C. Gerbig, E. Gottlieb, D.W.T. Griffith, D.F. Hurst, R. Jimenez, G. Keppel-Aleks, E. A. Kort, R. Macatangay, T. Machida, H. Matsueda, F. Moore, I. Morino, S. Park, J. Robinson, C.M. Roehl, Y. Sawa, V. Sherlock, C. Sweeney, T. Tanaka, and M.A. Zondlo: Calibration of the Total Carbon Column Observing Network using aircraft profile data, Atmos. Meas. Tech., 3, 1351–1362, 2010.

Wunch, D., P.O. Wennberg, G.C. Toon, G. Keppel-Aleks, Y.G. Yavin: Emissions of greenhouse gases from a North American megacity, Geophys. Res. Lett., 36, L15810, 2009.

Keppel-Aleks, G., G.C. Toon, P.O. Wennberg, N.M. Deutscher: Reducing the impact of source brightness fluctuations on spectra obtained by Fourier Transform Spectrometry, Appl. Optics, 46, 4774–4779, 2007.

Yang, Z., R.A. Washenfelder, G. Keppel-Aleks, N.Y. Krakauer, J.T. Randerson, P.P. Tans, C. Sweeney, P.O. Wennberg: New constraints on Northern Hemisphere growing season net flux, Geophys. Res. Lett, 34, L12807, 2007. 

Updated: 2014-09-18