Search Results - "Hanson, P. J"

Massive peatland carbon banks vulnerable to rising temperatures by Hopple, A. M., Wilson, R. M., Kolton, M., Zalman, C. A., Chanton, J. P., Kostka, J., Hanson, P. J., Keller, J. K., Bridgham, S. D.

“…Peatlands contain one-third of the world’s soil carbon (C). If destabilized, decomposition of this vast C bank could accelerate climate warming; however, the…”
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Stability of peatland carbon to rising temperatures by Wilson, R. M., Hopple, A. M., Tfaily, M. M., Sebestyen, S. D., Schadt, C. W., Pfeifer-Meister, L., Medvedeff, C., McFarlane, K. J., Kostka, J. E., Kolton, M., Kolka, R.K., Kluber, L. A., Keller, J. K., Guilderson, T. P., Griffiths, N. A., Chanton, J. P., Bridgham, S. D., Hanson, P. J.

“…Peatlands contain one-third of soil carbon (C), mostly buried in deep, saturated anoxic zones (catotelm). The response of catotelm C to climate forcing is…”
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Representing northern peatland microtopography and hydrology within the Community Land Model by Shi, X., Thornton, P. E., Ricciuto, D. M., Hanson, P. J., Mao, J., Sebestyen, S. D., Griffiths, N. A., Bisht, G.

“…Predictive understanding of northern peatland hydrology is a necessary precursor to understanding the fate of massive carbon stores in these systems under the…”
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Incorporating Microtopography in a Land Surface Model and Quantifying the Effect on the Carbon Cycle by Graham, J. D., Ricciuto, D. M., Glenn, N. F., Hanson, P. J.

“…Northern peatlands are a terrestrial carbon store, with an annual sink of 0.1 Pg C yr−1 and a total storage estimate of 547 Pg C. Northern peatlands are also…”
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Can current moisture responses predict soil CO2 efflux under altered precipitation regimes? A synthesis of manipulation experiments by Vicca, S, Bahn, M, Estiarte, M, van Loon, E. E, Vargas, R, Alberti, G, Ambus, P, Arain, M. A, Beier, C, Bentley, L. P, Borken, W, Buchmann, N, Collins, S. L, de Dato, G, Dukes, J. S, Escolar, C, Fay, P, Guidolotti, G, Hanson, P. J, Kahmen, A, Kröel-Dulay, G, Ladreiter-Knauss, T, Larsen, K. S, Lellei-Kovacs, E, Lebrija-Trejos, E, Maestre, F. T, Marhan, S, Marshall, M, Meir, P, Miao, Y, Muhr, J, Niklaus, P. A, Ogaya, R, Peñuelas, J, Poll, C, Rustad, L. E, Savage, K, Schindlbacher, A, Schmidt, I. K, Smith, A. R, Sotta, E. D, Suseela, V, Tietema, A, van Gestel, N, van Straaten, O, Wan, S, Weber, U, Janssens, I. A

“…As a key component of the carbon cycle, soil CO2 efflux (SCE) is increasingly studied to improve our mechanistic understanding of the important carbon flux…”
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Leaf age affects the seasonal pattern of photosynthetic capacity and net ecosystem exchange of carbon in a deciduous forest by WILSON, K. B, BALDOCCHI, D. D, HANSON, P. J

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Oak forest carbon and water simulations: model intercomparisons and evaluations against independent data by Hanson, P.J, Amthor, J.S, Wullschleger, S.D, Wilson, K.B, Grant, R.F, Hartley, A, Hui, D, Hunt, E.R. Jr, Johnson, D.W, Kimball, J.S

“…Models represent our primary method for integration of small-scale, process-level phenomena into a comprehensive description of forest-stand or ecosystem…”
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Sensitivity of Stomatal and Canopy Conductance to Elevated CO2 Concentration: Interacting Variables and Perspectives of Scale by Wullschleger, Stan D., Gunderson, C. A., Hanson, P. J., Wilson, K. B., Norby, R. J.

“…• The hydrological response of forests to rising CO2 is a critical biotic feedback in the study of global climate change. Few studies, however, have…”
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Use of stored carbon reserves in growth of temperate tree roots and leaf buds: analyses using radiocarbon measurements and modeling by GAUDINSKI, J.B, TORN, M.S, RILEY, W.J, SWANSTON, C, TRUMBORE, S.E, JOSLIN, J.D, MAJDI, H, DAWSON, T.E, HANSON, P.J

“…Characterizing the use of carbon (C) reserves in trees is important for understanding regional and global C cycles, stress responses, asynchrony between…”
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Separating Root and Soil Microbial Contributions to Soil Respiration: A Review of Methods and Observations by Hanson, P. J., Edwards, N. T., Garten, C. T., Andrews, J. A.

“…Forest soil respiration is the sum of heterotrophic (microbes, soil fauna) and autotrophic (root) respiration. The contribution of each group needs to be…”
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Transpiration from a multi-species deciduous forest as estimated by xylem sap flow techniques by Wullschleger, Stan D, Hanson, P.J, Todd, D.E

“…Thermal dissipation probes inserted into hydro-active sapwood were used to measure rates of xylem sap flow for six major hardwood species growing in an upland…”
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Low Dissolved Organic Carbon Input from Fresh Litter to Deep Mineral Soils by Fröberg, M., Jardine, P. M., Hanson, P. J., Swanston, C. W., Todd, D. E., Tarver, J. R., Garten, C. T.

“…Dissolved organic carbon (DOC) leached from recent litter in the forest floor has been suggested to be an important source of C to the mineral soil of forest…”
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Environmental and stomatal control of photosynthetic enhancement in the canopy of a sweetgum (Liquidambar styraciflua L.) plantation during 3 years of CO2 enrichment by Gunderson, C. A., Sholtis, J. D., Wullschleger, S. D., Tissue, D. T., Hanson, P. J., Norby, R. J.

“…Light‐saturated photosynthetic and stomatal responses to elevated CO2 were measured in upper and mid‐canopy foliage of a sweetgum (Liquidambar styraciflua L)…”
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Air/surface exchange of mercury vapor over forests—the need for a reassessment of continental biogenic emissions by Lindberg, S.E., Hanson, P.J., Meyers, T.P., Kim, K.-H.

“…Atmospheric sources are significant in the cycling of Hg in the biosphere, but there are few reliable data on air/surface exchange of Hg in terrestrial…”
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Factors controlling the timing of root elongation intensity in a mature upland oak stand by Joslin, J. D., Wolfe, M. H., Hanson, P. J.

“…We examined the timing of root elongation intensity (REI) - the production of newly elongating roots measured in length per unit soil volume per unit time - in…”
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A comprehensive data acquisition and management system for an ecosystem-scale peatland warming and elevated CO2 experiment by Krassovski, M B, Riggs, J S, Hook, L A, Nettles, W R, Hanson, P J, Boden, T A

“…Ecosystem-scale manipulation experiments represent large science investments that require well-designed data acquisition and management systems to provide…”
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Effects of throughfall manipulation on soil nutrient status: results of 12 years of sustained wet and dry treatments by JOHNSON, D.W, TODD, D.E. JR, HANSON, P.J

“…To investigate the potential effects of changing precipitation on forest ecosystems, the Throughfall Displacement Experiment (TDE) was established on Walker…”
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Belowground carbon allocation in forests estimated from litterfall and IRGA-based soil respiration measurements by Davidson, E.A, Savage, K, Bolstad, P, Clark, D.A, Curtis, P.S, Ellsworth, D.S, Hanson, P.J, Law, B.E, Luo, Y, Pregitzer, K.S, Randolph, J.C, Zak, D

“…Allocation of C to belowground plant structures is one of the most important, yet least well quantified fluxes of C in terrestrial ecosystems. In a literature…”
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Effects of altered water regimes on forest root systems by JOSLIN, J. D., WOLFE, M. H., HANSON, P. J.

“…How ecosystems adapt to climate changes depends in part on how individual trees allocate resources to their components. A review of research using tree…”
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Forest soil carbon inventories and dynamics along an elevation gradient in the southern Appalachian Mountains by Garten, C.T. Jr, Post, W.M. III, Cooper, H, Cooper, L.W

“…Soil organic carbon (SOC) was partitioned between unprotected and protected pools in six forests along an elevation gradient in the southern Appalachian…”
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