Search Results - "Kucharik, C"

Factors controlling CO2 exchange on timescales from hourly to decadal at Harvard Forest by Urbanski, S., Barford, C., Wofsy, S., Kucharik, C., Pyle, E., Budney, J., McKain, K., Fitzjarrald, D., Czikowsky, M., Munger, J. W.

“…We analyzed 13 years (1992−2004) of CO2 flux data, biometry, and meteorology from a mixed deciduous forest in central Massachusetts. Annual net uptake of CO2…”
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Land-use Effects on Soil Carbon and Nitrogen on a U.S. Midwestern Floodplain by Jelinski, N.A, Kucharik, C.J

“…Wet prairie soils in the Midwest store significant amounts of soil organic carbon (SOC) and total nitrogen (TN). Crop fields, prairie restorations of varying…”
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Evaluating the agreement between measurements and models of net ecosystem exchange at different times and timescales using wavelet coherence: an example using data from the North American Carbon Program Site-Level Interim Synthesis by Stoy, P. C, Dietze, M. C, Richardson, A. D, Vargas, R, Barr, A. G, Anderson, R. S, Arain, M. A, Baker, I. T, Black, T. A, Chen, J. M, Cook, R. B, Gough, C. M, Grant, R. F, Hollinger, D. Y, Izaurralde, R. C, Kucharik, C. J, Lafleur, P, Law, B. E, Liu, S, Lokupitiya, E, Luo, Y, Munger, J. W, Peng, C, Poulter, B, Price, D. T, Ricciuto, D. M, Riley, W. J, Sahoo, A. K, Schaefer, K, Schwalm, C. R, Tian, H, Verbeeck, H, Weng, E

“…Earth system processes exhibit complex patterns across time, as do the models that seek to replicate these processes. Model output may or may not be…”
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Carbon distribution and aboveground net primary production in aspen, jack pine, and black spruce stands in Saskatchewan and Manitoba, Canada by Gower, S. T., Vogel, J. G., Norman, J. M., Kucharik, C. J., Steele, S. J., Stow, T. K.

“…The objectives of this study are to (1) characterize the carbon (C) content, leaf area index, and aboveground net primary production (ANPP) for mature aspen,…”
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Closing the gap: global potential for increasing biofuel production through agricultural intensification by Johnston, Matt, Licker, R, Foley, J, Holloway, T, Mueller, N D, Barford, C, Kucharik, C

“…Since the end of World War II, global agriculture has undergone a period of rapid intensification achieved through a combination of increased applications of…”
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Carbon and energy fluxes in cropland ecosystems: a model-data comparison by Lokupitiya, E., Denning, A. S., Schaefer, K., Ricciuto, D., Anderson, R., Arain, M. A., Baker, I., Barr, A. G., Chen, G., Chen, J. M., Ciais, P., Cook, D. R., Dietze, M., Maayar, M. El, Fischer, M., Grant, R., Hollinger, D., Izaurralde, C., Jain, A., Kucharik, C., Li, Z., Liu, S., Li, L., Matamala, R., Peylin, P., Price, D., Running, S. W., Sahoo, A., Sprintsin, M., Suyker, A. E., Tian, H., Tonitto, C., Torn, M., Verbeeck, Hans, Verma, S. B., Xue, Y.

“…Croplands are highly productive ecosystems that contribute to land–atmosphere exchange of carbon, energy, and water during their short growing seasons. We…”
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A comparison of six methods for measuring soil-surface carbon dioxide fluxes by Norman, J. M., Kucharik, C. J., Gower, S. T., Baldocchi, D. D., Crill, P. M., Rayment, M., Savage, K., Striegl, R. G.

“…Measurements of soil‐surface CO2 fluxes are important for characterizing the carbon budget of boreal forests because these fluxes can be the second largest…”
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Characterization of radiation regimes in nonrandom forest canopies: theory, measurements, and a simplified modeling approach by Kucharik, C.J, Norman, J.M, Gower, S.T

“…We used field measurements and Monte Carlo simulations of canopy gap-size distribution and gap fraction to examine how beam radiation interacts with clumped…”
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Characterizing canopy nonrandomness with a multiband vegetation imager (MVI) by Kucharik, C. J., Norman, J. M., Murdock, L. M., Gower, S. T.

“…A new method for measuring plant canopy nonrandomness and other architectural components has been developed using a 16 bit (65535 gray scale levels)…”
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Testing the performance of a dynamic global ecosystem model: Water balance, carbon balance, and vegetation structure by Kucharik, Christopher J., Foley, Jonathan A., Delire, Christine, Fisher, Veronica A., Coe, Michael T., Lenters, John D., Young‐Molling, Christine, Ramankutty, Navin, Norman, John M., Gower, Stith T.

“…While a new class of Dynamic Global Ecosystem Models (DGEMs) has emerged in the past few years as an important tool for describing global biogeochemical cycles…”
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Carbon and Nitrogen Sequestration in Two Prairie Topochronosequences on Contrasting Soils in Southern Wisconsin by BRYE, K. R, KUCHARIK, C. J

“…Prairie restoration has the potential to sequester nitrogen (N) and atmospheric carbon (C) in the soil, but the capability of a site to respond positively to…”
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Effects of logging on carbon dynamics of a jack pine forest in Saskatchewan, Canada by Howard, E.A, Gower, S.T, Foley, J.A, Kucharik, C.J

“…We calculated carbon budgets for a chronosequence of harvested jack pine (Pinus banksiana Lamb.) stands (0‐, 5‐, 10‐, and∼29‐year‐old) and a∼79‐year‐old stand…”
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Impact of changing land use practices on nitrate export by the Mississippi River by Doner, S.D, Kucharik, C.J, Foley, J.A

“…The increased use of nitrogen fertilizer in the Mississippi River Basin since the 1950s has been blamed for declining water quality, the degradation of aquatic…”
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Evaluating the impacts of land management and climate variability on crop production and nitrate export across the Upper Mississippi Basin by Donner, Simon D., Kucharik, Christopher J.

“…The increased use of nitrogen (N) fertilizers in the Mississippi Basin since the 1950s is partially responsible for an increase in crop production, but also a…”
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Effects of El Niño–Southern Oscillation on the Climate, Water Balance, and Streamflow of the Mississippi River Basin by Twine, Tracy E., Kucharik, Christopher J., Foley, Jonathan A.

“…Climatic and hydrologic observations and results from a terrestrial ecosystem model coupled to a regional-scale river-routing algorithm are used to document…”
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Evaluation of the importance of Lagrangian canopy turbulence formulations in a soil–plant–atmosphere model by Wilson, T.B., Norman, J.M., Bland, W.L., Kucharik, C.J.

“…The suitability of using K-theory to describe turbulent transfer within plant canopies was evaluated with field measurements and simulations of a detailed…”
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Measurements of branch area and adjusting leaf area index indirect measurements by Kucharik, Christopher J, Norman, John M, Gower, Stith T

“…Estimates of leaf area index obtained with indirect measurement techniques, which are replacing more arduous destructive sampling methods, are frequently…”
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Climate Change and Ecological Restoration at the University of Wisconsin-Madison Arboretum by Glass, Stephen B, Herrick, Bradley M, Kucharik, Christopher J

“…We consider potential impacts of global climate change for restoration practitioners in Wisconsin through a discussion of restoration and land management at…”
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Impacts of recent climate change on Wisconsin corn and soybean yield trends by Kucharik, Christopher J, Serbin, Shawn P

“…The US Corn Belt supports agroecosystems that flourish in a temperate climate regime that could see significant changes in the next few decades. Because…”
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Soil carbon lost from Mollisols of the North Central U.S.A. with 20 years of agricultural best management practices by Sanford, Gregg R., Posner, Joshua L., Jackson, Randall D., Kucharik, Christopher J., Hedtcke, Janet L., Lin, Ting-Li

“…► Effect of six agroecosystems of the North Central U.S.A. on soil organic carbon (SOC). ► Modern SOC data are compared to archived samples to ascertain ΔSOC…”
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