Samuel Levis's Home Page

Samuel Levis

I am a project scientist in the Terrestrial Sciences Section of NCAR's Climate and Global Dynamics Division. As a member of Dr. Bonan's research team, I am involved in the development of the Community Land Model (CLM). In parallel to the development work, I support collaborating users of the land model, by providing them the code and data sets necessary to run. Other users may contact me with questions about the land model.

Since 1/99 I have accomplished the following:

- Coupled the CLM to the global river routing scheme of Branstetter and Erickson (2003)
- Tested coupling the land model to the high-resolution river routing scheme of Coe (2000)
- Added to the land model the dust emissions and turbulent dry deposition model of Zender (2003)
- Added to the land model volatile organic compound emissions according to the model of Guenther et al (1995) (Levis et al, 2003)
- Put together new data sets of land cover and soil texture as part of the land model's boundary conditions (Bonan et al, 2002)
- Coupled the land model to the Dynamic Global Vegetation Model of Sitch et al (2003) (Bonan et al, 2003)

Of the above progress, items 1 and 5 have made it into the May 17th 2002 release of CCSM2.

Education

Ph.D., Climate, People, and Environment Program, Atmospheric and Oceanic Sciences, University of Wisconsin - Madison, 1999, Thesis: "Bi-directional interactions simulated by a synchronously coupled atmosphere-vegetation model."
M.S., Climate, People, and Environment Program, Atmospheric and Oceanic Sciences, University of Wisconsin - Madison, 1995, Thesis: "The simulated terrestrial hydrologic budget of a land surface model bounded by observed climatology."
B.A., Physics/Atmospheric Sciences, Cornell University, 1992

Post-Doctoral Employment

Project Scientist I, Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, Colorado, 8/02-present
Associate Scientist II, Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, Colorado, 1/99-7/02

Address

National Center for Atmospheric Research

P.O. Box 3000

Boulder, Colorado 80307-3000

e-mail: slevis@ucar.edu

tel. (303) 497 1627

fax. (303) 497 1695

office: at Center Green through 4/03

References mentioned in this web page

Bonan, G.B., S. Levis, L. Kergoat, and K.W. Oleson, Landscapes as patches of plant functional types: An integrating concept for climate and ecosystem models. Global Biogeochem. Cycles, 16, doi:10.1029/2000GB001360, 2002.

Bonan, G.B., S. Levis, S. Sitch, M. Vertenstein, K.W. Oleson, A dynamic global vegetation model for use with climate models: concepts and description of simulated vegetation dynamics, Global Change Biol., 9, 1543-1566, 2003.

Branstetter, M.L. and D.J. Erickson III, Continental runoff dynamics in the Community Climate System Model (CCSM2) control simulation, J. Geophys. Res., 108, Doi:10.1029/2003JD003212, 2003

Coe, M.T., Modeling terrestrial hydrological systems at the continental scale: Testing the accuracy of an atmospheric GCM, J. Climate, 13, 686-704, 2000

Guenther, A., C. N. Hewitt, D. Erickson, R. Fall, C. Geron, T. Graedel, P. Harley, L. Klinger, M. Lerdau, W. McKay, T. Pierce, B. Scholes, R. Steinbrecher, R. Tallamraju, J. Taylor and P. Zimmerman, A global model of natural volatile organic compound emissions. J. Geophys. Res. 100, 8873-8892, 1995.

Levis, S., C. Wiedinmyer, G. Bonan, A. Guenther, Simulating biogenic volatile organic compound emissions in the Community Climate System Model, J. Geophys. Res.-Atmos., 108(D21), Art. No. 4659, 2003

Sitch, S., B. Smith, I.C. Prentice, A. Arneth, A. Bondeau, W. Cramer, J.O. Kaplan, S. Levis, W. Lucht, M.T. Sykes, K. Thonicke, and S. Venevsky, Evaluation of ecosystem dynamics, plant geography and terrestrial carbon cycling in the LPJ dynamic global vegetation model. Global Change Biol., 9, 161-185, 2003.

Zender, C.S., H. Bian, D. Newman, Mineral Dust Entrainment And Deposition (DEAD) model: Description and 1990's dust climatology, J. Geophys. Res., 108(D14), 4416, doi:10.1029/2002JD002775, 2003