Publications

Publications Found: 1437

Evapotranspiration And Soil Water Content In A Scrub-Oak Woodland Under Carbon Dioxide Enrichment
Hungate, B. A., Reichstein, M., Dijkstra, P., Johnson, D., Hymus, G., Tenhunen, J. D., Hinkle, C., Drake, B. G.

Leaf conductance often decreases in response to elevated atmospheric CO2 concentration (Ca) potentially leading to changes in hydrology. We describe the hydrological responses of Florida scrub oak to elevated Ca during an eight-month period two years after Ca


Journal: Global Change Biology, Volume 8 (3): 289-298 (2002). DOI: 10.1046/j.1365-2486.2002.00468.x Sites: US-KS2

Modeling Seasonal To Annual Carbon Balance Of Mer Bleue Bog, Ontario, Canada
Frolking, S., Roulet, N. T., Moore, T. R., Lafleur, P. M., Bubier, J. L., Crill, P. M.

Northern peatlands contain enormous quantities of organic carbon within a few meters of the atmosphere and play a significant role in the planetary carbon balance. We have developed a new, process-oriented model of the contemporary carbon balance of northern peatlands, the Peatland Carbon Simulator (PCARS). Components of PCARS are …


Journal: Global Biogeochemical Cycles, Volume 16 (3): 1-21 (2002). DOI: 10.1029/2001gb001457 Sites: CA-Mer

Measurement Carbon Dioxide Concentration Does Not Affect Root Respiration Of Nine Tree Species In The Field
Burton, A. J., Pregitzer, K. S.
Inhibition of respiration has been reported as a short-term response of tree roots to elevated measurement CO2 concentration ([CO2]), calling into question the validity of root respiration rates determined at CO2 concentrations that differ from the soil [CO2] in …


Journal: Tree Physiology, Volume 22 (1): 67-72 (2002). DOI: 10.1093/treephys/22.1.67 Sites: US-SP1

Photosynthesis And Respiration Of Black Spruce At Three Organizational Scales: Shoot, Branch And Canopy
Rayment, M. B., Loustau, D., Jarvis, P. J.
To gain insight into the function of photosynthesis and respiration as processes operating within a global ecosystem, we measured gas exchange of mature black spruce (Picea mariana (Mill.) B.S.P.) trees at three organizational scales: individual shoots, whole branches and a forest canopy. A biochemical …


Journal: Tree Physiology, Volume 22 (4): 219-229 (2002). DOI: 10.1093/treephys/22.4.219 Sites: CA-Obs

Relationship Of Area-Averaged Carbon Dioxide And Water Vapour Fluxes To Atmospheric Variables
Mahrt, L., Vickers, D.

Area-averaged fluxes are constructed from a combination of aircraft and tower data collected during BOREAS. The averaging area includes both conifer and deciduous forests, wetlands, burned areas and bodies of water. The area-averaged water vapour flux is closely related …


Journal: Agricultural And Forest Meteorology, Volume 112 (3-4): 195-202 (2002). DOI: 10.1016/s0168-1923(02)00079-5 Sites: CA-Fen, CA-Oas, CA-Obs, CA-Ojp, CA-SJ3

Estimating Net Primary Productivity From Grassland Biomass Dynamics Measurements
Scurlock, J. M., Johnson, K., Olson, R. J.

To address the need for a high quality data set based upon field observations suitable for parameterization, calibration, and validation of terrestrial biosphere models, we have developed a comprehensive global database on net primary productivity (NPP). We have compiled field measurements of biomass and associated environmental …


Journal: Global Change Biology, Volume 8 (8): 736-753 (2002). DOI: 10.1046/j.1365-2486.2002.00512.x Sites: US-KFB, US-Kon

Short-Term Light And Leaf Photosynthetic Dynamics Affect Estimates Of Daily Understory Photosynthesis In Four Tree Species
Naumburg, E., Ellsworth, D. S.
Instantaneous measurements of photosynthesis are often implicitly or explicitly scaled to longer time frames to provide an understanding of plant performance in a given environment. For plants growing in a forest understory, results from photosynthetic light response curves in conjunction with diurnal light …


Journal: Tree Physiology, Volume 22 (6): 393-401 (2002). DOI: 10.1093/treephys/22.6.393 Sites: US-Dk3

Gross Primary Productivity In Duke Forest: Modeling Synthesis Of CO2 Experiment And Eddy-Flux Data
Luo, Y., Medlyn, B., Hui, D., Ellsworth, D., Reynolds, J., Katul, G.


Journal: Ecological Applications, Volume 11 (1): 239-252 (2001). DOI: 10.2307/3061070 Sites: US-Dk3

Quantifying The Complexity In Mapping Energy Inputs And Hydrologic State Variables Into Land-Surface Fluxes
Katul, G. G., Lai, C., Albertson, J. D., Vidakovic, B., Schäfer, K. V., Hsieh, C., Oren, R.

This study explores the complexity (or disorder) in mapping energy (Rn) forcing to land surface fluxes of sensible heat (Hs), water vapor (LE), and carbon dioxide (or net ecosystem exchange, NEE) for different soil water states (θ). Specifically, we ask, does the vegetation …


Journal: Geophysical Research Letters, Volume 28 (17): 3305-3307 (2001). DOI: 10.1029/2000gl012154 Sites: US-Dk3

Annual Cycle Of CO2 Exchange At A Bog Peatland
Lafleur, P. M., Roulet, N. T., Admiral, S. W.

Eddy covariance measurements of the carbon dioxide flux from an ombrotrophic bog near Ottawa, Canada, were made between June 1, 1998, and May 31, 1999. Net ecosystem exchange of CO2 (NEE) showed …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 106 (D3): 3071-3081 (2001). DOI: 10.1029/2000jd900588 Sites: CA-Mer