Cooperative Institute for Research in Environmental Sciences

Tom Chase Group

Tom Chase Group


The Chase research group focuses on modeling and observational studies of the effects of the land surface and changing landcover (for example, deforestation, desertification, and irrigation) and their effects on regional and global climate. 

The Chase Research Group focues on modeling and observational studies of the effects of the land surfance and changing landcover (for example, deforestation, desertification, and irrigation) and their effects on regional and global climate. Tropical and sub-Tropical Monsoon systems have been a particular area of study. We also have projects in the general area of non-linear geophysics such as examining climate feedbacks in the hydrological cycle and the effects of a variable sun on climate model simulations 

Current Projects

Tropical/subtropical Monsoons

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Non-linear Geophysics

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Global Landcover change

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Climate model land surface datasets

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Climate Change Observations

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Peer Reviewed Publications

Lawrence, Peter J., Thomas N. Chase, Investigating the Climate Impacts of Global Land Cover Change in the Community Climate System Model (CCSM 3.0), International Journal of Climatology (In Press)

Herman, Ben, Michael Barlage, Thomas N. Chase, Roger A. Pielke Sr. A update on a proposed mechanism for the regulation of mid tropospheric Arctic temperatures, J. Geophys. Res – Atmos., 113, D24101, doi: 10.1029/2008JD009799.

Lee Eungul, Thomas N. Chase, Peter J. Lawrence, Balaji Rajagopalan, Model assessment of the observed relationship between El Nino and the northern East Asian summer monsoon using the CCSM3, J. Geophys. Res. –Atmospheres, 113, D20118, doi10.1029/2008JD009926.

Lee, E., T. N. Chase, and B. Rajagopalan , Highly improved predictive skill in the forecasting of the northern East Asian summer monsoon, Water Resources Research, 44, W10422, doi:10.1029/2007WR006514

- highlighted in Nature, "Prediction with Plants" Nature 456, 144c, Nov., 2008.

Chase, T. N., K. Wolter, R. A. Pielke, Sr., and I. Rasool, 2008. Reply to comment by W. M. Connolley on; Was the 2003 European summer heat wave unusual in a global context?;, Geophys. Res. Lett., 35,
L02704, doi:10.1029/2007GL031574.

Herman, Ben, Michael Barlage, Thomas N. Chase, Roger A. Pielke Sr. A update on a proposed mechanism for the regulation of mid troposphericArctic temperatures, J. Geophys. Res – Atmospheres (In Press)

Lee Eungul, Thomas N. Chase, Peter J. Lawrence, Balaji Rajagopalan, Model assessment of the observed relationjship between El Nino and the northern East Asian summer monsoon using the CCSM3, J. Geophys. Res. – Atmospheres (in press)

Lee, E., T. N. Chase, and B. Rajagopalan , Highly improved predictive skill in the forecasting of the northern East Asian summer monsoon,Water Resources Research (In Press)

Chase, T. N., K. Wolter, R. A. Pielke, Sr., and I. Rasool, 2008. Reply to comment by W. M. Connolley on; Was the 2003 European summer heat wave unusual in a global context?;, Geophys. Res. Lett., 35, L02704, doi:10.1029/2007GL031574.

Biggs, Trent W., Christopher A. Scott, Anju Gaur, Eungul Lee, Thomas Chase, Irrigation dominates atmospheric forcing of decadal trends in heat fluxes and surface cooling, Krishna Basin, India. Water Resour. Res., 44, W12415, doi:10.1029/2008WR006847

Lee, Eungul, Thomas N Chase, Balaji Rajagopalan, R.J. Barry, Trent Biggs, Peter J. Lawrence, 2008. Effect of irrigation and spring vegetation activity on early Indian summer monsoon variability. Int. J Clim DOI:10.1002/joc1721.

Leavitt, Steven W., Thomas N. Chase, Balaji Rajagopalan, Eungul Lee, Peter J. Lawrence, 2008. Environmental signals inherent in carbon isotope indices from Southwestern pinyon tree rings. Geophys. Res. Lett., Vol. 35, L12704, doi:10:1029/2008GL033894.

Lawrence, Peter J. and Thomas N. Chase. Climate impacts on the Community Climate System Model (CCSM 3.0) of making the surface hydrology of the Community Land Model (CLM 3.0) consistent with the Simple Biosphere (SiB 2.0). Journal of Hydrometeorology Volume 10, Issue 2 (April 2009) pp. 374–394, DOI: 10.1175/2008JHM987

Davey, Christopher, Roger A. Pielke Sr., Thomas N. Chase, Annual and seasonal tropospheric temperature trend comparisons of radiosonde and reanalysis data at regional scales. National Weather Digest (In Press)

Lee, Eungul, Thomas N. Chase, Balaji Rajagopalan, 2008. Seasonal forecasting of East Asian summer monsoon based on oceanic heat sources. Int. J. Clim. 28: 667-678.

Pielke, R.A. Sr., J. Adegoke, T. Chase, C. Marshall, T. Matsui, D. Nyogi, 2007. A new paradigm for assesssing the role of agriculture in the climate system and in climate change. Agric. Forest Meteor., Special Issue 132: 234-254.

Leavitt, S.W., T.N. Chase, B. Rajagopalan, E. Lee, P.J. Lawrence, C.A. Woodhouse, 2007. Southwestern U.S. drought maps from Pinyon tree-ring delC13. EOS Transactions 88: 39.

Chase, T. N., K. Wolter, R. A. Pielke, Sr., and I. Rasool (2006), Was the 2003 European summer heat wave unusual in a global context?, Geophys. Res. Lett., 33, L23709, doi:10.1029/2006GL027470.

Lawrence, Peter J., Thomas N. Chase, 2007. Representing new MODIS consistent land surface in the Community Land Model (CLM 3.0). Jour. Geophys. Res.: Biogeochemical cycles: 112, G01023, doi 10.1029/2006JG000168.

Nordstrom, K., V. Gupta, T.N. Chase, 2005. Role of the hydrological cycle in regulating the planetary climate system in a simple nonlinear dynamical model. Nonlinear Processes in Geophysics 0000, 1-13, Sref ID 1607-7946/npg/2005/0000-1.

Chase, Thomas N., Roger A. Pielke Sr., Roni Avissar, 2005. Teleconnections in the Earth System. Chapter 183 in: Encyclopedia of the Hydrologic Sciences. Malcolm Anderson and Jeffrey McDonald Eds. John Wiley and Sons. 3456 pp.

Tsukernik, Maria, T. N. Chase, M.C. Serreze, R.G. Barry, R. Pielke Sr., B. Herman, X. Zeng, 2004. On the regulation of minimum mid-tropospheric temperatures in the Arctic. Geophys. Res. Lett., Vol. 31, No. 6, L06112, 10.1029/2003GL018831.

Pielke, R.A. Sr., Thomas N. Chase, 2004. Technical Comment on "Contributions of Anthropogenic and Natural Forcing toRecent Tropopause Height Changes". Science 303: 1771.

Chase, T.N., R.A. Pielke Sr., B. Herman, X. Zeng, 2004. On the likelihood of a strong surface warming unaccompanied by warming in the free troposphere. Climate Research 25: 185-190.

Nordstrom, Keith M., Vijay K. Gupta, Thomas N. Chase, 2004. Salvaging the Daisyworld parable under the Dynamic Area Fraction framework. Scientists Debate Gaia: The Next Century, S.H. Schneider, J. Miller, E. Crist, P. Boston eds. MIT Press, Cambridge.

Chase, Thomas N, John A. Knaff, Roger A. Pielke Sr., Eugenia Kalnay, 2003. Changes in global monsoon circulations since 1950. Natural Hazards 29: 229-254.

Pielke Sr., Roger A., Greg Marland, Richard Betts, Thomas N. Chase, Joseph L.Eastman, John O. Niles, Dev Niyogi, Steven W. Running, 2002. The influence of land-use change and landscape dynamics on the climate system - Relevance to climate change policy beyond the radiative effect of greenhouse gasses. Philosophical Transactions of the Royal Society of London (Series A) 360: 1-15.

Chase, T. N., B. Herman, R. A. Pielke Sr., X. Zeng, M. Leuthold, 2002. A proposed mechanism for the regulation of mid-tropospheric temperatures in the Arctic. J. Geophys. Res.- Atmospheres: 107: NO. 0, 10.1029/2001JD001425.

Otterman, J., R. Atlas, S.-H. Chou, J.C. Jusem, R.A. Pielke Sr., T.N. Chase, J. Rogers, G.L. Russell, S.D. Schubert, Y.C. Sud, and J. Terry, 2002: Are stronger North-Atlantic southwesterlies the forcing to the late winter warming in Europe? Int. J. Climatol., 22, 743-750.

Chase, T.N., R.A. Pielke Sr., M. Zhao, A.J. Pitman, T.G.F. Kittel, S.R. Running, R.R. Nemani, 2002. The Relative Climatic Effects of Landcover Change and Elevated Carbon Dioxide Combined with Aerosols: A Comparison of Model Results and Observations. J. Geophys. Res. 106: 31,685-31,691.

Gregory, P.J., J S Ingram, R Andersson, R A Betts, V Brovkin, T Chase, A Gray, P Grace, N Hamilton, T B Hardy, M Howden, A Jenkins, M Maybeck, M Olsson, I Ortiz-Monasterio, C A Palm, M Rummukainen, R E Schulze, M Thiem, C Valentin, M J Wilkinson, 2002. Environmental consequences of increasing food and fiber production. Agriculture, Ecosystems and Environment 88: 279-290.

Pielke, R.A. Sr., T.N. Chase, T.G.F. Kittel, J. Knaff, J. Eastman, 2001. Analysis of 200mb wind for the period 1958-1997. Jour. Geophys. Res. 106: 27,287-27,290.

Zhao, M., A.J. Pitman, T.N. Chase, 2001. Climatic effects of landcover change at different carbon dioxide levels. Climate Research: 17: 1-18

Zhao, M., A.J. Pitman, T.N. Chase, 2001. The impact of land cover change on the atmospheric circulation. Clim. Dyn. 17: 467-477.

Chase, Thomas N., Roger A. Pielke Sr., John A. Knaff, Timothy G.F. Kittel, Joseph L. Eastman, 2000. Comparison of Regional Trends in 1979-1997 depth-averaged tropospheric temperatures. International Journal Climatology 20: 503-518.

Chase, Thomas N., Roger A. Pielke Sr., Timothy G.F. Kittel, Ramakrishna Nemani, Steven W. Running, 2000. Simulated impacts of historical land cover changes on global climate in northern winter. Climate Dynamics 16: 93-105.

Chase, Thomas N., Roger A. Pielke, Timothy G.F. Kittel, Jill S. Baron, Thomas J. Stohlgren, 1999. Potential impacts on Colorado Rocky Mountain weather due to land Use Changes on the adjacent Great Plains. Journal of Geophysical Research 104: 16,673-16,690.

Pielke, R.A. Sr., R.L. Walko, L. Steyaert, P.L. Vidale, G.E. Liston, W.A. Lyons, T.N. Chase, 1999. The influence of anthropogenic landscape changes on weather in South Florida. Mon. Weather. Rev.: 127: 1,663-1,673.

Pielke, Roger A., Joseph E. Eastman, Thomas N. Chase, John Knaff, Timothy G.F. Kittel, 1998. Correction to ``1973 - 1996 trends in depth-averaged tropospheric temperature''. Journal of Geophysical Research 103: 28,909-28,911.

Pielke, Roger A., Joseph E. Eastman, Thomas N. Chase, John Knaff, Timothy G.F. Kittel, 1998. 1973 - 1996 trends in depth-averaged tropospheric temperature. Journal of Geophysical Research 103: 16,927-16,933.

Stohlgren, Thomas J., Thomas N. Chase, Roger A. Pielke, Timothy G.F. Kittel, and Jill S. Baron. 1998. Evidence that local land use practices influence regional climate and vegetation patterns in adjacent natural areas. Global Change Biology 4: 495-504.

Chase, T.N., R.A. Pielke, T.G.F. Kittel, R. Nemani, S.R. Running. 1996. The Sensitivity of a General Circulation Model to Large Scale Changes in Leaf Area Index. Journal Geophysical Research 101: 7,393-7,408.

Nemani, Ramakrishna, Steven R. Running, Roger A. Pielke, Thomas N. Chase. 1996. Global vegetation cover changes from coarse resolution satellite data. Journal Geophysical Research 101: 7,157-7,162.

Pielke, R.A., J.S. Baron, T.G.F. Kittel, T.J. Lee, T.N. Chase, and J.M.Cram, 1992. Influence of Landscape Structures on the Hydrologic Cycle and Regional and Global Climate. Proceedings,''Managing Water Resources During Global Change'', American Water Resources Association (AWRA), November 1-5, 1992, Reno, Nevada.

Pielke, R.A., J.S. Baron, T.G.F. Kittel, T.J. Lee, T.N. Chase, and J.M.Cram, 1992. Influence of Landscape Structures on the Hydrologic Cycle and Regional and Global Climate. Proceedings,''Managing Water Resources During Global Change'', American Water Resources Association (AWRA), November 1-5, 1992, Reno, Nevada.and Model (CLM 3.0). J. Geophys. Res.-Biogeosci.: Vol. 112

Book Chapters and Other Publications

Chase et al.

Lawrence, P.J., and T.N. Chase, Representing a MODIS Consistent Land Surface in the Community Land Model (CLM 3.0): Part 1 Generating MODIS Consistent Land Surface Parameters, CIRES, University of Colorado, Boulder, Colorado, 2006.

Lawrence, P.J., and T.N. Chase, Representing a MODIS Consistent Land Surface in the Community Land Model (CLM 3.0): Part 2 Sensitivity Experiments with the Community Climate System Model (CCSM 3.0), CIRES, University of Colorado, Boulder, Colorado, 2006.

Classes Taught

GEOG 5100: Climate System Modeling
This is a hands on research seminar focusing on climate model development from the simplest to most complex models culminating with a final research project designing and analyzing a General Circulation climate model experiment.

GEOG3600/ATOC3601: Introduction to Climate.
A general introduction to climate variables, measurement, variability and circulation, energy flow and climate change.

GEOG3300/ATOC3301: Analysis of Weather and Climate Observations
An introduction to weather and weather forecasting. Analysis of weather observations, identification of patterns in data, understanding the physics of weather.

GEOG 1001: Climate and Vegetation
An introductory survey of the interlinked atmosphere and biosphere.

GEOG=Department of Geography
ATOC=Department of Atmospheric and Oceanic Sciences

Members of Tom Chase's Group: 

Contact

Address

University of Colorado at Boulder
Cooperative Institute for Research in Environmental Sciences
216 UCB, CIRES Department
Boulder, CO 80309
Phone: 303-492-1274
Fax: 303-492-1149
Email
 

CIRES 201 
Phone: 303-492-1274