Gretchen Keppel-Aleks

Carbon Cycle Research Group

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Butterfield, Z, W. Buermann, G. Keppel-Aleks , "Satellite observations reveal seasonal redistribution of northern ecosystem productivity in response to interannual climate variability", Remote Sensing of Environment.

Basile, S. J., X. Lin, W. R. Wieder, M. D. Hartman, G. Keppel-Aleks, "Leveraging the signature of heterotrophic respiration on atmospheric CO2 for model benchmarking", Biogeosciences.

Gerlein-Safdi, C., G. Keppel-Aleks , F. Wang, S. Frolking, D. L. Mauzerall, "Satellite monitoring of natural reforestation efforts in China's drylands", One Earth.


Lawrence, D. M. , R.A., Fisher, C. D. Koven, K W. Oleson, S. C. Swenson, G. Bonan, N. Collier, B. Ghimire, L. van Kampenhout, D. Kennedy, E. Kluzek, P. J. Lawrence, F. Li, H. Li, D. Lombardozzi, W. J. Riley, W. J. Sacks, M. Shi, M. Vertenstein, W. R. Wieder, C. Xu, A. A. Ali, A. M. Badger, G. Bisht, M. A. Brunke, S. P. Burns, J. Buzan, M. Clark, A. Craig, K. Dahlin, B. Drewniak, J. B. Fisher, M. Flanner, A. M. Fox, P. Gentine, F. Hoffman, G. Keppel- Aleks , R. Knox, S. Kumar, J. Lenaerts, L. R. Leung, W. H. Lipscomb, Y. Lu, A. Pandey, J. D. Pelletier, J. Perket, J. T. Randerson, D. M. RIcciuto, B. M. Sanderson, A. Slater, Z. M. Subin, J. Tang, R. Q. Thomas, M. Val Martin, X. Zeng, "The Community Land Model version 5: Description of new features, benchmarking, and impact of forcing uncertainty", Journal of Advances in Modeling the Earth System.

Zhu, P., S. J. Cheng, Z. Butterfield, G. Keppel-Aleks, A. L. Steiner, "The Global Influence of Cloud Optical Thickness on Terrestrial Carbon Uptake",Earth Interactions.

Torres, A. D., G. Keppel-Aleks, S. C. Doney, M. A. Fendrock, K. Luis, M. de Maziere, F. Hase, C. Petri, D. F. Pollard, C. M. Roehl, R. Sussman, V. A. Velazco, T. Warneke, D. Wunch "A geostatistical framework for quantifying the imprint of mesoscale at- mospheric transport on satellite trace gas retrievals". Journal of Geophysical Research-Atmosphere.


Collier, N., F. M. Hoffman, D. M. Lawrence, G. Keppel-Aleks, C. D. Koven, W. J. Riley, M. Mu, and J. T. Randerson, The ILAMB benchmarking system: Design, theory, and implementation, J. Advances in Modeling Earth Systems, 10, 2731-2754,2018, doi://10.1029/

Hamilton, M, A. P. Fischer, S. D. Guikema, G. Keppel-Aleks: Behavioral adaptation to climate change in wildfire-prone forests, WIREs Climate Change, doi:10.1002/wcc.554, 2018. link

Keppel-Aleks, G., S. J. Basile, and F. M. Hoffman: A functional response metric for the temperature sensitivity of tropical ecosystems, Earth Interactions, 7, doi:10.1175/EI-D-17-0017.1, 2018. link


J. Liptak, G. Keppel-Aleks, and K. Lindsay: Drivers of multi-century trends in the atmospheric CO2 mean annual cycle in a prognostic ESM, Biogeosciences, 14, 1383-1401, 2017/ link


G. Keppel-Aleks and R. A. Washenfelder: The effect of atmospheric sulfate reductions on diffuse radiation and photosynthesis in the United States during 1995-2013, Geophysical Research Letters, 43, 9984-9993, 2016. link
link to EOS article about research


G. Keppel-Aleks, A. S. Wolf, M. Mu, S. C. Doney, D. C. Morton, P. S. Kasibhatla, J. B. Miller, E. J. Dlugokencky, and J. T. Randerson: Separating the influence of temperature, drought, and fire on interannual variability in atmospheric CO2, Global Biogeochemical Cycles, 28, 1295-1310, 2014. link


Wunch, D., P.O. Wennberg, J. Messerschmidt, N. Parazoo, G.C. Toon, N.M. Deutscher, G. Keppel-Aleks, C.M. Roehl, J. T. Randerson, T. Warneke, J. Notholt, and A. Jacobson: The covariation of northern hemisphere XCO2 seasonal cycle minima with high- latitude surface temperature, Biogeosciences, in press.

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. link

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


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. link


Wunch, D., P.O. Wennberg, G.C. Toon, B.J. Connor, B. Fisher, G.B. Osterman, C. Frankenberg, L. Mandrake, 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. Robinson, 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. link

Keppel-Aleks, G., P.O. Wennberg, and T. Schneider, (2011), "Sources of variations in total column carbon dioxide", Atmos. Chem. Phys, 10. link

Butz, A. and coauthors, (2011), "Toward accurate CO2 and CH4 observations from GOSAT", Geophys. Res. Lett., 38. link

Reuter, M. and coauthors, (2011), "Retrieval of atmospheric CO2 with enhanced accuracy and precision from SCIAMACHY: Validation with FTS measurements and comparison with model results", J. Geophys. Res. link


Wunch, D. and coauthors, (2010), "Calibration of the Total Carbon Column Observing Network against aircraft profile data", Atmos. Meas. Tech., 3. link Deutscher, N.M. and coauthors, (2010), "Total column CO2 measurements at Darwin, Australia - site description and calibration against in situ aircraft profiles," Atmos. Meas. Tech., 3. link

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

Keppel-Aleks, G., G. C. Toon, P. O. Wennberg, and N. M. Deutscher, (2007), "Reducing the impact of source brightness fluctuations on spectra obtained by Fourier-transform spectrometry," Appl. Opt. 46, 4774-4779. link

Yang, Z., R. A. Washenfelder, G. Keppel-Aleks, N. Y. Krakauer, J. T. Randerson, P. P. Tans, C. Sweeney, and P. O. Wennberg, (2007), "New constraints on Northern Hemisphere growing season net flux", Geophys. Res. Lett., 34, L12807, doi:10.1029/2007GL029742. link

Zuberi, B., K. S. Johnson, G. K. Aleks, L. T. Molina, M. J. Molina, and A. Laskin, (2005), "Hydrophilic properties of aged soot", Geophys. Res. Lett., 32, L01807, doi:10.1029/2004GL021496. link