I have specific modeling experience with general circulation
models (GCMs) and regional climate models (RCMs). Most of my research with these models has
focused on paleoclimate simulations and data-model
comparisons, especially during the Holocene and Last Glacial Maximum
(LGM). I used the National Center for
Atmospheric Research (NCAR) Community Climate Model Version 1 (CCM1) to explore
the sensitivity of the climate system to different forcing mechanisms, such as
ice sheets, orbital insolation, and atmospheric CO2 increases (Felzer et al., 1995, 1996, 1998, 1999) and the GENESIS
model to study the hydrology of the paleoArctic
environment (Felzer et al., 2000; Felzer,
2001). During my postdoctoral research
In my role as a Climate Scenarios Coordinator for the U.S.
National Assessment, I was responsible for interacting with scientists and
stakeholders from regions across the
Below are results from Lee et al. (2013) in which we used the latest NCAR model, CESM, on my own Beowulf cluster, Lehigh’s Corona cluster, and NSF’s Yellowstone cluster. These experiments involve changes to the CLM-CN land model to explore the role of carbon dynamics in the coupled land-atmosphere system.
Figure 1: Improvement of CLM4-CN by using N-limited GPP for determination of stomatal conductance, and comparions to observed runoff values from GSWP2 (Global Soil Wetness Project 2). Evaluations of CLM4-CN control and downregulation with GSWP2 for total runoff (mm/year), a) FLUXNET MTE, b) Control, c) Control – FLUXNET MTE, d) Downregulation – Control.
I am also currently working with graduate student Travis Andrews to test the hypothesis that irrigation in the Great Plains and Midwestern U.S. has an impact on precipitation in the Northeast U.S., using the NCAR CESM model (CAM-CLM) by conducting experiments with and without irrigation.
Felzer, B., R. J. Oglesby, H. Shao, T. Webb III, D. Hyman, W. L. Prell and J. E. Kutzbach (1995). "A systematic study of GCM sensitivity to latitudinal changes in solar radiation." Journal of Climate 8: 877-887.
Felzer, B., R.J. Oglesby, T. Webb III, and D. Hyman (1996). "Sensitivity of a general circulation model to changes in northern hemisphere ice sheets", Journal of Geophysical Research 101(D14): 19077-19092.
Felzer, B.,T. Webb III, and R.J. Oglesby (1998). "The impact of ice sheets, CO2, and orbital insolation on late Quaternary climates: Sensitivity experiments with a general circulation model", Quaternary Science Reviews, 17: 507-534.
Felzer, B., T. Webb III, and R. J. Oglesby (1999). "Climate model sensitivity to changes in boundary conditions during the Last Glacial Maximum", Paleoclimates: Data and Modeling, 3(4): 257-278 .
Felzer, B. and P. S. Heard (1999). "Precipitation differences amongst GCMs used for the U.S. National Assessment", Journal of the American Water Resources Association, 35(6): 1327-1339.
Felzer, B., Thompson, S. L., Pollard, D., and J. C. Bergengren. (2000). "GCM-simulated hydrology in the Arctic during the past 21,000 years", Journal of Paleolimnology, 24: 15-28.
Felzer, B. (2001). "Climate impacts of an ice sheet in East Siberia during the Last Glacial Maximum", Quaternary Science Reviews, 20: 437-447.
Felzer, B. and S. L. Thompson. (2001). “Evaluation of a regional
climate model for paleoclimate applications in the
MacCracken, M. C., Barron, E. J., Easterling, D. R., Felzer, B. S., and Karl, T. R. (2003). “Climate change scenarios for the U.S. National Assessment”, Bulletin of the American Meteorological Society, DOI: 10.1175/BAMS-84-12-1711.
National Assessment Synthesis Team. (2000). “Climate change
impacts on the
Lee, E., Barford, C. L., Kucharik, C. J., Felzer, B. S., Foley, J. A. 2011. Role of turbulent heat fluxes over land in the monsoon over East Asia. International Journal of Geosciences, 2: 420-431.
Lee, E. and Felzer, B. S. 2013. Effects of Nitrogen Limitation on Hydrological Processes in CLM4-CN. Journal of Advances in Modeling Earth Systems. 5(4): 741-754. doi:10.1002/jame.20046.