Tom O'Halloran

Assistant Professor
Forestry and Environmental Conservation Department, Baruch Institute of Coastal Ecology and Forest Science

Office: BICEFS
Phone: 843-546-1013
Fax: 843-546-6296

Personal Website:

 Educational Background

Ph.D. Environmental Sciences
University of Virginia 2008

M.S. Environmental Sciences
University of Virginia 2004

B.A. Environmental Sciences
University of Virginia 2001

 Courses Taught

Introductory Micrometeorology


Dr. O'Halloran joined the faculty at Clemson in 2016 as an assistant professor stationed at the Baruch Institute of Coastal Ecology and Forest Science. Broadly, Dr. O'Halloran is interested in understanding the role of forests in the climate system, and his research crosses the disciplines of Landscape Ecology, Biometeorology and Forestry. Prior to Clemson, Dr. O'Halloran was research faculty at Virginia Tech and Sweet Briar College, where he taught courses in Environmental Science and founded the SBC Land-Atmosphere Research Station.

 Research Interests

Forestry, carbon sequestration and cycling, biometeorology, biogeophysics and albedo radiative forcing, disturbances and land management, biofuels, aerosols and new particle formation, coastal carbon cycling.


Seyednasrollah, B., et al. [incl. T.L. O'Halloran] 2019. PhenoCam Dataset v2.0: Vegetation Phenology from Digital Camera Imagery, 2000-2018. ORNL DAAC, Oak Ridge, Tennessee, USA. [DATASET]

Bright, R. M. and O'Halloran, T. L.: Developing a monthly radiative kernel for surface albedo change from satellite climatologies of Earth's shortwave radiation budget: CACK v1.0, Geosci. Model Dev., 12, 3975–3990,, 2019.

Bright R. M. and T. L. O'Halloran. 2019. A monthly shortwave radiative forcing kernel for surface albedo change using CERES satellite data. Environmental Data Initiative. [DATASET].

Chu, H., D.D. Baldocchi, C. Poindexter, M. Abraha, A.R. Desai, G. Bohrer, M. Altaf Arain, T. Griffis, P.D. Blanken, T.L. O'Halloran, R.Q. Thomas, Q. Zhang, S. Burns, J.M. Frank, D. Christian, S. Brown, T.A. Black, C.M. Gough, B.E. Law, X. Lee, J.n Chen, D.E. Reed, W.J. Massman, K. Clark, J. Hatfield, J. Prueger, R. Bracho, J.M. Bake, T.A. Martin. 2018..Temporal dynamics of aerodynamic canopy height derived from eddy covariance momentum flux data across North American Flux Networks. Geophysical Research Letters. doi: 10.1029/2018GL079306

Bright, R.M., Davin, E., O'Halloran, T.L., Pongratz, J., Zhao, K., and A. Cescatti. Local temperature response to land cover and management change driven by non-radiative processes. Nature Climate Change. 2017. doi:10.1038/nclimate3250.

O'Halloran, T.L. and R. M. Bright. More diverse benefits from timber versus dedicated bioenergy plantations for terrestrial carbon dioxide removal. Environmental Research Letters. 2017.

O'Halloran, T.L., Fuentes, J.D., Tao, W.-K., and Li, X. Sensitivity of convection to observed variation in aerosol size and composition at a rural site in the southeastern United States. Journal of Atmospheric Chemistry. 2015. 10.1007/s10874-015-9300-x.

O'Halloran, T.L., Joerger, V., Law, B.E., Acker, S., Kertis, J. Post-fire influences of snag attrition on albedo and radiative forcing. Geophysical Research Letters. 2014. DOI: 10.1002/2014GL062024

Kathilankal, J. C., O'Halloran, T. L., Schmidt, A., Hanson, C. V., and Law, B. E.: Development of a semi-parametric PAR (Photosynthetically Active Radiation) partitioning model for the contiguous United States, version 1.0., Geosci. Model Dev.,7, 2477-2484, doi:10.5194/gmd-7-2477-2014, 2014.

Rivera-Monroy, V. H., E. Castaneda-Moya, J. G. Barr, V. Engel, J. D. Fuentes, T. G. Troxler, R. Twilley, S. Bouillon, T. J. Smith, and T. L.O'Halloran. Current methods to evaluate net primary production and carbon budgets in mangrove forests. In Methods in Biogeochemistry of Wetlands. 2013. ISBN-13: 978-0891189602. R.D. DeLaune, K.R. Reddy, C.J. Richardson, and J.P. Megonigal, eds.

J. G. Barr, J. D. Fuentes, M. S. DeLonge, T. L. O'Halloran, D. Barr, and J. C. Zieman. 2013. Influences of tidal energy advection on the surface energy balance in a mangrove forest. Biogeosciences, 10, 501-511

O'Halloran, T.L., Law, B.E., Wang, Z., Barr, J.G., Schaaf, C., Brown, M., Goulden, M.L., Fuentes, J.D., Göckede, M., Black, A., Engel, V. 2012. Radiative forcing of natural forest disturbances. Global Change Biology. 18, 555-565.

Goetz, S.J, Bond-Lamberty, B., Law, B., Hicke, J., McNulty, S., O'Halloran, T.L., Meddens, A.J.H., Pfeifer, E.M., Mildrexler, D., Kasischke, E. 2012. Observations and assessment of forest carbon dynamics following disturbance in North America. Journal of Geophysical Research, Biogeosciences. 117, G02022. doi:10.1029/2011JG001733

Shuman, J.K., Shugart, H.H., O'Halloran, T.L. 2011. Sensitivity of Siberian larch forests to climate change. Global Change Biology. 17, 2370-2384.

Barr, J. G., V. Engel, J. D. Fuentes, J. C. Zieman, T. L. O'Halloran, T.L., J. Smith III, and G. H. Anderson. 2010. Controls on mangrove forest-atmosphere carbon dioxide exchanges in western Everglades National Park, J. Geophys. Res., 115, G02020, doi:10.1029/2009JG001186.

Anderson, R.G., Canadell, J.G., Randerson, J.T., Jackson, R.B., Hungate, B.A., Baldocchi, D.D., Ban-Weiss, G.A., Bonan, G.B., Caldeira, K., Cao, L., Diffenbaugh, N.S., Gurney, K.R., Kueppers, L.M., Law, B.E., Luyssaert, S., O'Halloran, T.L. 2010. Biophysical considerations in forestry for climate protection. Frontiers in Ecology and the Environment. doi:10.1890/090179

O'Halloran, T.L., Fuentes, J.D., Collins, D.R., Cleveland, M.J., and Keene, W.C. Influence of air mass source region on nanoparticle events and hygroscopicity in central Virginia, U.S. 2009. Atmospheric Environment, 43, 3586-3595.

Keene, W.C., Long, M.S., Pszenny, A.A.P., Sander, R., Maben, J.R., Wall, A.J., O’Halloran, T.L., Kerkweg, A., Fischer, E.V., and Schrems, O. 2009. Latitudinal variation in the multiphase chemical processing of inorganic halogens and related species over the eastern North and South Atlantic Oceans, Atmospheric Chemistry and Physics, 9, 7361-7385.


O'Halloran AmeriFlux sites in Virginia
NPR station WVTF interview
USDA grant press release: switchgrass and loblolly
O'Halloran Lab website
Nature Climate Change paper: mapping vegetation climate impacts