Greg A. Barron-Gafford

Phone: 
Email: 
gregbg@email.arizona.edu
Website: 
Degrees/Affiliations: 
PhD, Ecology and Evolutionary Biology, University of Arizona, 2010
Title & Affiliation: 
Assistant Professor, Biosphere 2 and School of Geography and Development, University of Arizona 
Adjunct Faculty, School of Natural Resources & the Environment, University of Arizona

My research group focuses on understanding the ecohydrological implications of environmental and climatic change on semiarid ecosystem functioning. In particular, we examine leaf, soil, and whole-ecosystem carbon and water dynamics in areas undergoing vegetative change through woody plant encroachment and in montane forests characterized by complex terrain. Our work involves an interdisciplinary approach for extensive field sampling, ecosystem monitoring, and cross-scale modeling efforts.

We use Biosphere 2 to study the Water-Climate linkages within the LEO landscapes and through experiments nestled within this highly-controllable environment.  In conducting experiments within Biosphere 2 we get to both (i) disentangle environmental variation that exists in the natural world and (ii) work in view of the public – translating our science in real time.

Publications

2017 (Published)

CO2 diffusion into pore spaces limits weathering rate of an experimental basalt landscape . van Haren, J., Dontsova, K., Barron-Gafford, G. A., Troch, P. A., Chorover, J., Delong, S. B., Breshears, D. D., Huxman, T. E., Pelletier J. D., Saleska, S. R., Xeng, X., and Ruiz, J. (2017): Geology 45(3): 203-206.

2017 (Published)

Improving the accuracy of the gradient method for determining soil carbon dioxide efflux . Sánchez-Cañete, E. P., Scott, R. L., van Haren, J., and Barron-Gafford, G. A. (2017): Journal of Geophysical Research: Biogeosciences 122(1): 50-64.

2017 (Published)

Impacts of hydraulic redistribution on grass–tree competition vs facilitation in a semi-arid savanna . Barron-Gafford, G. A., Sanchez-Cañete, E. P., Minor, R. L., Hendryx, S. M., Lee, E., Sutter, L. F., Tran, N., Parra, E., Colella, T., Murphy, P. C., Hamerlynck, E. P., Kumar, P. and Scott, R. L. (2017): New Phytologist 215(4): 1451–1461.

2017 (Published)

A multi-species synthesis of physiological mechanisms in drought-induced tree mortality . Adams, H.D., Zeppel, M.J.B., Anderegg, W.R.L., Hartmann, H., Landhausser, S.M., Tissue, D.T., Huxman, T.E., Hudson, P.J., Franz, T.E., Allen, C.D., Anderegg, L.D.L., Barron-Gafford, G.A., Beerling, D.J., Breshears, D.D., Brodribb, T.J., Bugmann, H., Cobb, R.C., Collins, A.D., Dickman, L.T., Duan, H., Ewers, B.E., Galiano, L., Galvez, D.A., Garcia-Forner, N., Gaylord, M.L., Germino, M.J., Gessler, A., Hacke, U.G., Hakamada, R., Hector, A., Jenkins, M.W., Kane, J.M., Kolb, T.E., Law, D.J., Lewis, J.D., Limousin, J-M., Love, D.M., Macalady, A.K., Marti­nez-Vilalta, J., Mencuccini, M., Mitchell, P.J., Muss, J.D., O'Brien, M.J., O'Grady, A.P., Pangle, R.E., Pinkard, E.A., Piper, F.I., Plaut, J.A., Pockman, W.T., Quirk, J., Reinhardt, K., Ripullone, F., Ryan, M.G., Sala, A., Sevanto, S., Sperry, J.S., Vargas, R., Vennetier, M., Way, D.A., Xu, C., Yepez, E.A., and McDowell, N.G. (2017): Nature Ecology & Evolution 1: 1285–1291.

2017 (Published)

Photosynthetic phenological variation may promote coexistence among co-dominant tree species in a Madrean sky island mixed conifer forest . Potts, D.L., Minor, R.L., Braun, Z., Barron-Gafford, G.A. (2017): Tree Physiology 37(9): 1229–1238.

2016 (Published)

The carbon balance pivot point of southwestern U.S. semiarid ecosystems: Insights from the 21st century drought . Scott, R. L., Biederman, J. A., Hamerlynck, E. P., and Barron-Gafford, G. A. (2016): Journal of Geophysical Research: Biogeosciences 120(12): 2612–2624.

2016 (Published)

The Photovoltaic Heat Island Effect: Larger solar power plants increase local temperatures . Barron-Gafford, G. A., Minor, R. L., Allen, N. A., Cronin, A. D., Brooks, A. E., and Pavao-Zuckerman, M. A. (2016): Scientific Reports 6: 35070.

2015 (Published)

The Landscape Evolution Observatory: A large-scale controllable infrastructure to study coupled Earth-surface processes . Pangle, L.A., DeLong, S.B., Abramson, N., Adams, J., Barron-Gafford, G.A., Breshears, D.D., Brooks, P.D., Chorover, J., Dietrich, W.E., Dontsova, K., Durcik, M., Espeleta, J., Ferre, T.P.A., Ferriere, R., Henderson, W., Hunt, E.A., Huxman, T.E., Millar, D., Murphy, B., Niu, G-Y., Pavao-Zuckerman, M., Pelletier, J.D., Rasmussen, C., Ruiz, J., Saleska, S., Schaap, M., Sibayan, M., Troch, P.A., Tuller, M., van Haren, J., Zeng, X. (2015): Geomorphology 244: 190-203.

2015 (Published)

Critical zone services: expanding context, constraints, and currency beyond ecosystem services . Field, J. P., Breshears, D.D, Law, D. J., Villegas, J. C., López-Hoffman, L., Brooks, P. D., Chorover, J., Barron-Gafford, G. A., Gallery, R. E., Litvak, M. E., Lybrand, R., McIntosh, J. C., Meixner, T., Niu, G.-Y., Papuga, S. A., Pelletier, J. D., Rasmussen, C. R., and Troch, P.A. (2015): Vadose Zone Journal 14(1).

2015 (Published)

Does the Production of Isoprene Affect the Productivity of Poplars? . McFarland, E.J., Parra, E.A., Barron-Gafford, G., Minor, R.L., and Heard M. (2015): STAR (STEM Teacher and Researcher) Program Posters.

2014 (Published)

Assessing five evolving microbial enzyme models against field measurements from a semiarid savannah – what are the mechanisms of soil respiration pulses? . Zhang, X., Niu, G.-Y., Elshall, A. S., Ye, M., Barron-Gafford, G. A., Pavao-Zuckerman, M. (2014): Geophysical Research Letter 41(18): 6428–6434.

2014

Rapid CO2 consumption during incipient weathering of a granular basaltic hillslope in the Landscape Evolution Observatory, Biosphere 2 . Ruiz, J., Van Haren, J., Dontsova, K., Barron-Gafford, G., Troch, P., Chorover J. (2014): Abstract V23A-4778 presented at 2014 Fall Meeting, AGU, San Francisco, CA, 15-19 Dec.

2014

Monitoring and Modeling Water, Energy and Carbon Fluxes at the Hillslope Scale in the Landscape Evolution Observatory . Troch, P., Barron-Gafford, G., Dontsova, K., Fang, Y., Niu, G.-Y., Pangle, L., Tuller, M., Van Haren, J. (2014): Abstract H43L-1128 presented at 2014 Fall Meeting, AGU, San Francisco, CA, 15-19 Dec.

2014

Quantification of Model Uncertainty in Modeling Mechanisms of Soil Microbial Respiration Pulses to Simulate Birch Effect . Elshall, A., Ye, M., Niu, G.-Y., Barron-Gafford, G. (2014): Abstract IN43B-3695 presented at 2014 Fall Meeting, AGU, San Francisco, CA, 15-19 Dec.

2013

Modeling the "Birch Effect" Using a Microbial Enzyme Based Soil Organic Carbon Decomposition and Gas Transport Model . Niu, G.-Y., Zhang, X., Barron-Gafford, G., Pavao-Zuckerman, M. (2013): Abstract B33C-0496 presented at 2013 Fall Meeting, AGU, San Francisco, CA, 9-13 Dec.

2013

Precipitation pulse dynamics of carbon sequestration and efflux in highly weatherable soils . Barron-Gafford, G., Minor, R., Van Haren, J.L., Dontsova, K., Troch, P.A. (2013): Abstract EP13C-0879 presented at 2013 Fall Meeting, AGU, San Francisco, CA, 9-13 Dec.

2013 (Published)

Coevolution of nonlinear trends in vegetation, soils, and topography with elevation and slope aspect: A case study in the sky islands of southern Arizona . Pelletier, J. D., Barron-Gafford, G. A., Breshears, D. D., Brooks, P. D., Chorover, J., Durcik, M., Harman, C. J., Huxman, T. E., Lohse, K. A., Lybrand, R., Meixner, T., McIntosh, J. C., Papuga, S. A., Rasmussen, C., Schaap, M., Swetnam, T. L., and Troch, P. A. (2013): Journal of Geophysical Research: Earth Surface 118: 741-758.

2012 (Published)

Green leaf volatiles and oxygenated metabolite emission bursts from mesquite branches following light–dark transitions . Jardine, K., Barron-Gafford, G. A., Norman, J. P., Abrell, L., Monson, R. K., Meyers, K. T., Pavao-Zuckerman, M., Dontsova, K., Kleist, E., Werner, C., Huxman, T. E. (2012): Photosynthesis Research 113(1): 321-333.