Greg Barron-Gafford
Assistant Professor for Research with B2Earthscience at the University of Arizona
Barron-Gafford's page
PhD, Ecology and Evolutionary Biology, University of Arizona, 2010
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.
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CZO Publications
Papers/Books
2020
Vegetation source water identification using isotopic and hydrometric observations from a subhumid mountain catchment. Dwivedi R., Eastoe C., Knowles J.F., Wright W.E., Hamann L., Minor R., Mitra B., Meixner T., McIntosh J., Ferre P.A.T., Castro C., Niu G.-Y., Barron‐Gafford G.A., Abramson N., Papuga S.A., Stanley M., Hu J., Chorover J. (2020): Ecohydrology 13(1): e2167
2020
Ubiquitous Fractal Scaling and Filtering Behavior of Hydrologic Fluxes and Storages from A Mountain Headwater Catchment. Dwivedi R., Knowles J.F., Eastoe C., Minor R., Abramson N., Mitra B., Wright W.E., McIntosh J., Meixner T., Ferre P.A.T., Castro C., Niu G.-Y., Barron-Gafford G.A., Stanley M., and Chorover J. (2020): Water 12(2): 613
2020
Montane forest productivity across a semiarid climatic gradient. Knowles J.F., Scott R.L., Biederman J.A., Blanken P.D., Burns S.P., Dore S., Kolb T.E., Litvak M.E., Barron‐Gafford G.A. (2020): Global Change Biology (online)
2020
Ecosystem carbon and water cycling from a sky island montane forest. Knowles J.F., Scott R.L., Minor R.L., Barron-Gafford G.A. (2020): Agricultural and Forest Meteorology 281: 107835
2020
Critical Zone Science in the Anthropocene: Opportunities for biogeographic and ecological theory and praxis to drive earth science integration. Minor J., Pearl J.K., Barnes M.L., Colella T.R., Murphy P.C., Mann S., Barron-Gafford G.A. (2020): Progress in Physical Geography: Earth and Environment 44(1): 50–69
2020
Topography influences species-specific patterns of seasonal primary productivity in a semiarid montane forest. Murphy P.C., Knowles J.F., Moore D.J.P., Anchukaitis K., Potts D.L., Barron-Gafford G.A. (2020): Tree Physiology 40(10): 1343–1354
2019
Hydrologic functioning of the deep critical zone and contributions to streamflow in a high‐elevation catchment: Testing of multiple conceptual models. Dwivedi R., Meixner T., McIntosh J.C., Ferré P.A.T., Eastoe C.J., Niu G.-Y., Minor R.L., Barron-Gafford G.A., Chorover J. (2019): Hydrological Processes 33(4): 476-494
2019
Soil Fluid Biogeochemical Response to Climatic Events. Olshansky Y., Knowles J.F., Barron‐Gafford G.A., Rasmussen C., Abramson N., Chorover J. (2019): Journal of Geophysical Research: Biogeosciences 124(9): 2866-2882
2018
Why Do Large‐Scale Land Surface Models Produce a Low Ratio of Transpiration to Evapotranspiration?. Chang L.-L., Dwivedi R., Knowles J.F., Fang Y.-H., Niu G.-Y., Pelletier J.D., Rasmussen C., Durcik M., Barron‐Gafford G.A., Meixner T. (2018): Journal of Geophysical Research: Atmospheres 123(17): 9109-9130
2018
Impact of Hydraulic Redistribution on Multispecies Vegetation Water Use in a Semiarid Savanna Ecosystem: An Experimental and Modeling Synthesis. Lee, E., Kumar, P., Barron-Gafford, G.A., Hendryx, S.M., Sanchez-Canete, E.P., Minor, R.L., Colella, T., and Scott, R.L. (2018): Water Resources Research Cross-CZO
2018
Which way do you lean? Using slope aspect variations to understand Critical Zone processes and feedbacks. Pelletier J. D., Barron‐Gafford G. A., Gutiérrez‐Jurado H., Hinckley E.‐L. S., Istanbulluoglu E., McGuire L. A., Niu G.‐Y., Poulos M. J., Rasmussen C., Richardson P., Swetnam T. L., and Tucker G. E. (2018): Earth Surface Processes and Landforms, 43(5): 1133–1154 Cross-CZO
2018
A considerable fraction of soil-respired CO2 is not emitted directly to the atmosphere. Sánchez-Cañete E.P., Barron-Gafford G.A. & Chorover J. (2018): Scientific Reports 8: 13518
2018
Controlled Experiments of Hillslope Coevolution at the Biosphere 2 Landscape Evolution Observatory: Toward Prediction of Coupled Hydrological, Biogeochemical, and Ecological Change. Volkmann T.H.M., Sengupta A., Pangle L.A., Dontsova K., Barron-Gafford G.A., Harman C.J., Niu G.-Y., Meredith L.K., Abramson N., Meira Neto A.A., Wang Y., Adams J.R., Breshears D.D., Bugaj A., Chorover J., Cueva A., DeLong S.B., Durcik M., Ferre T.P.A., Hunt E.A., Huxman T.E., Kim M., Maier R.M., Monson R.K., Pelletier J.D., Pohlmann M., Rasmussen C., Ruiz J., Saleska S.R., Schaap M.G., Sibayan M., Tuller M., van Haren J.L.M., Zeng X. and Troch P.A. (2018): in: Hydrology of Artificial and Controlled Experiments (eds. Jiu-Fu Liu and Wei-Zu Gu), IntechOpen, pp. 25-74
2017
The temperature response surface for mortality risk of tree species with future drought. Adams H.D., Barron-Gafford G.A., Minor R.L., Gardea A.A., Bentley L.P., Law D.J., Breshears D.D., McDowell N.G., Huxman T.E. (2017): Environmental Research Letters 12(11): 115014
2017
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
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 Cross-CZO
2017
Impacts of Hydraulic Redistribution on Grass-tree Competition vs Facilitation in a Semi-arid Savanna. Barron-Gafford, G.A., Sanchez-Canete, 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
2017
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
2017
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
2015
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.A., 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
Chapter 8 – Ecohydrology and the Critical Zone: Processes and Patterns Across Scales. Moore G., McGuire K., Troch P., Barron-Gafford G. (2015): Developments in Earth Surface Processes 19: 239-266
2015
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 Cross-CZO
2015
Climatic and landscape influences on soil moisture are primary determinants of soil carbon fluxes in seasonally snow-covered forest ecosystems. Stielstra C.M., Lohse K.A., Chorover J., McIntosh J.C., Barron-Gafford G.A., Perdrial J.N., Litvak M., Barnard H.R., Brooks P.D. (2015): Biogeochemistry 123(3): 447–465 Cross-CZO
2015
Sensitivity of regional evapotranspiration partitioning to variation in woody plant cover: insights from experimental dryland tree mosaics. Villegas J.C., Dominguez F., Barron-Gafford G.A., Adams H.D., Guardiola-Claramonte M., Sommer E.D., Selvey A.W., Espeleta J.F., Zou C.B., Breshears D.D. and Huxman T.E. (2015): Global Ecology and Biogeography 24(9): 1040-1048
2014
Influence of snow cover duration on soil evaporation and respiration efflux in mixed-conifer ecosystems. Nelson K., Kurc S.A., John G., Minor R. and Barron-Gafford G.A. (2014): Ecohydrology 7(2): 869–880
2014
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., and Pavao-Zuckerman M. (2014): Geophysical Research Letters 41(18): 6428–6434
2013
Nonstructural leaf carbohydrate dynamics of Pinus edulis during drought-induced tree mortality reveal role for carbon metabolism in mortality mechanism. Adams H.A., Germino M.J., Breshears D.D., Barron-Gafford G.A., Guardiola-Claramonte M., Zou C.B., and Huxman T.E. (2013): New Phytologist 197: 1142–1151
2013
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(2): 741-758
Papers and books that explicitly acknowledge a CZO grant are highlighted in PALE ORANGE.
Other CZO Publications
2018
An improved and practical approach for estimating catchment-scale response functions through power spectral analysis. Dwivedi, R., Meixner, T., Mcintosh, J.C., Ferre, T.P.A., Eastoe, C.J., Castro, C.L., Wright, W.E., Niu, G.-Y., Minor, R.L., Knowles, J.F., Barron-Gafford, G., Abramson, N., Mitra, B., Stanley, M., Chorover, J. (2018): Abstract H13J-1876 presented at 2018 AGU Fall Meeting, Washington, D.C., 10-14 Dec
2018
Comparing the Impact of Hydraulic Redistribution on Co-existing Vegetation Interaction in Semi-arid Upland and Riparian Sites. Lee, E., Kumar, P., Barron-Gafford, G., Scott, R.L. (2018): Abstract H11A-08 presented at 2018 AGU Fall Meeting, Washington, D.C., 10-14 Dec Cross-CZO
2018
Quantifying plant physiological response to water stress with high-frequency, near-surface observations of chlorophyll fluorescence and photochemical reflectivity. Yan, D., Scott, R.L., Biederman, J.A., Barron-Gafford, G., Yang, X., Moore, D.J.P., Dannenberg, M.P., Wang, X., Knowles, J.F., Yang, J., Smith, W.K. (2018): Abstract B31N-2694 presented at 2018 AGU Fall Meeting, Washington, D.C., 10-14 Dec
2015
Complex terrain in the Critical Zone: How topography drives ecohydrological patterns of soil and plant carbon exchange in a semiarid mountainous system. Barron-Gafford G., Minor R., Heard M., Sutter L., Yang J., Potts D. (2015): Abstract H23J-01 presented at 2015 Fall Meeting, AGU, San Francisco, CA, 14-18 Dec.
2015
Determining the Role of Hydraulic Redistribution Regimes in the Critical Zone. Lee E., Kumar P., Barron-Gafford G., Scott R., Hendryx S., Sanchez-Canete E. (2015): Abstract H53E-1701 presented at 2015 Fall Meeting, AGU, San Francisco, CA, 14-18 Dec. Cross-CZO
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.
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
The Coupling of Ecosystem Productivity and Water Availability in Dryland Regions (Invited). Scott R., Biederman J., Barron-Gafford G. (2014): Abstract H54A-07 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.
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
Bridging from Soil to Ecosystem Goods and Services Provided by the Critical Zone. Field J.P., Breshears D.D., Law D.J., Brooks P.D., Chorover J., Pelletier J.D., Troch P.A., López-Hoffman L., Rasmussen C., Papuga S., Harpold A., Biederman J.A., Barron-Gafford G.A., McIntosh J.C., Litvak M. (2013): Abstract presented at AGU Chapman Conference on Soil-mediated Drivers of Coupled Biogeochemical and Hydrological Processes Across Scales, Biosphere 2, Tucson, Arizona, 21-24 October 2013 (Poster) Cross-CZO
2013
Modeling the “Birch Effect” Using a Microbial Enzyme Based Soil Organic Carbon Decomposition and Gas Transport Model. Niu G., 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
Examining the Physical Drivers of Photosynthetic Temperature Sensitivity Within a Sub-alpine Mixed Conifer Forest. Yang J., Barron-Gafford G., Minor R., Heard M. (2013): Abstract EP13C-0877 presented at 2013 Fall Meeting, AGU, San Francisco, CA, 9-13 Dec.
2012
Influence of understory greenness on trace gas and energy exchange in forested ecosystems. Swetish J., Papuga S. A., Litvak M. E., Barron-Gafford G. A., Mitra B. (2012): Abstract B51B-0511 presented at 2012 Fall Meeting, AGU, San Francisco, Calif., 3-7 Dec (Poster)
2011
Influence of Snow Cover Duration on Soil Evaporation and Respiration Efflux in Mixed-conifer Ecosystems . Nelson, K., Papuga, S.A., John, G.P., Minor, R., Barron-Gafford, G.A. (2011): AGU Fall Meeting Presentations (Poster) Abstract B41A-0205.
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News
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Events
SWES Colloquium Series 2013-2014
Woody plant encroachment: Influence of landscape change on soil carbon fluxes, weathering, and ecosystem function
Marley 230.
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