Publications

Publications Found: 1378

Leaf δ13C In Pinus Resinosa Trees And Understory Plants: Variation Associated With Light And CO2 Gradients
Berry, S. C., Varney, G. T., Flanagan, L. B.

 Our objective was to evaluate the relative importance of gradients in light intensity and the isotopic composition of atmospheric CO2 for variation in leaf carbon isotope ratios within a Pinus resinosa forest. …


Journal: Oecologia, Volume 109 (4): 499-506 (1997), ISBN . DOI: 10.1007/s004420050110 Sites: CA-Mer

Cold Season CO2 Emission From Arctic Soils
Oechel, W. C., Vourlitis, G., Hastings, S. J.

Recent evidence indicates that significant amounts of C may be lost as CO2 to the atmosphere from tundra ecosystems during the fall, winter and spring months. Because high latitude ecosystems are …


Journal: Global Biogeochemical Cycles, Volume 11 (2): 163-172 (1997), ISBN . DOI: 10.1029/96gb03035 Sites: US-HVa, US-Upa

Variability In Leaf-Level CO2 And Water Fluxes In Pinus Banksiana And Picea Mariana In Saskatchewan
Sullivan, J. H., Bovard, B. D., Middleton, E. M.
We measured seasonal and canopy-level gas exchange in two stands of jack pine (Pinus banksianaLamb.) and one stand of black spruce (Picea mariana (Mill.) B.S.P.) on relatively clear days from late May until mid-September 1994. Field measurements were made with a portable infrared gas analyzer, …


Journal: Tree Physiology, Volume 17 (8-9): 553-561 (1997), ISBN . DOI: 10.1093/treephys/17.8-9.553 Sites: CA-Obs, CA-Ojp

Measuring And Modelling Carbon Dioxide And Water Vapour Exchange Over A Temperate Broad-Leaved Forest During The 1995 Summer Drought
Baldocchi, D.

Forests in the south-eastern United States experienced a prolonged dry spell and above-normal temperatures during the 1995 growing season. During this episode, nearly continuous, …


Journal: Plant, Cell And Environment, Volume 20 (9): 1108-1122 (1997), ISBN . DOI: 10.1046/j.1365-3040.1997.d01-147.x Sites: US-WBW

Seasonal Variation Of Energy And Water Vapor Exchange Rates Above And Below A Boreal Jack Pine Forest Canopy
Baldocchi, D. D., Vogel, C. A., Hall, B.

Fluxes of energy and water vapor over boreal forest stands are expected to vary during the growing season due to temporal variations in solar energy, soil and air temperature, soil moisture, photosynthetic …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 102 (D24): 28939-28951 (1997), ISBN . DOI: 10.1029/96jd03325 Sites: CA-Ojp

Transpiration Of A Boreal Pine Forest Measured By Branch Bag, Sap Flow And Micrometeorological Methods
Saugier, B., Granier, A., Pontailler, J. Y., Dufrene, E., Baldocchi, D. D.

Three independent methods were used to evaluate transpiration of a boreal forest: the branch bag, sap flow and eddy covariance methods. The branch bag method encloses several thousand needles and gives a continuous record of branch transpiration. The sap flow method provides a continuous record of sap velocity and an estimate of …


Journal: Tree Physiology, Volume 17 (8-9): 511-519 (1997), ISBN . DOI: 10.1093/treephys/17.8-9.511 Sites: CA-Obs

Energy Balance And Canopy Conductance Of A Boreal Aspen Forest: Partitioning Overstory And Understory Components
Blanken, P. D., Black, T. A., Yang, P. C., Neumann, H. H., Nesic, Z., Staebler, R., den Hartog, G., Novak, M. D., Lee, X.

The energy balance components were measured throughout most of 1994 in and above a southern boreal aspen (Populus tremuloides Michx.) forest (53.629°N 106.200°W) with a hazelnut (Corylus cornuta Marsh.) understory as part of the Boreal Ecosystem-Atmosphere Study. The turbulent fluxes were measured at both levels …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 102 (D24): 28915-28927 (1997), ISBN . DOI: 10.1029/97jd00193 Sites: CA-Oas

Growth And Maintenance Respiration Rates Of Aspen, Black Spruce And Jack Pine Stems At Northern And Southern BOREAS Sites
Lavigne, M. B., Ryan, M. G.

We measured stem respiration rates during and after the 1994 growing season of three common boreal tree species at sites near the northern and southern boundaries of the closed-canopy boreal forest in central Canada. The growth respiration coefficient (rg; carbon efflux per μmole of carbon incorporated in structural …


Journal: Tree Physiology, Volume 17 (8-9): 543-551 (1997), ISBN . DOI: 10.1093/treephys/17.8-9.543 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp

Seasonal Variation Of Carbon Dioxide, Water Vapor, And Energy Exchanges Of A Boreal Black Spruce Forest
Jarvis, P. G., Massheder, J. M., Hale, S. E., Moncrieff, J. B., Rayment, M., Scott, S. L.

Measurements of the fluxes of latent heat λE, sensible heat H, and CO2 were made by eddy covariance in a boreal black spruce forest as part of the Boreal Ecosystem-Atmosphere Study (BOREAS) for 120 days through the growing season in 1994. BOREAS is a multiscale study in which satellite, airborne, stand-scale, …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 102 (D24): 28953-28966 (1997), ISBN . DOI: 10.1029/97jd01176 Sites: CA-Obs

A Physiological Basis For Biosphere-Atmosphere Interactions In The Boreal Forest: An Overview
Margolis, H. A., Ryan, M. G.
Interdisciplinary field experiments for global change research are large, intensive efforts that study the controls on fluxes of carbon, water, trace gases, and energy between terrestrial ecosystems and the atmosphere at a range of spatial scales. Forest ecophysiology can make significant contributions to …


Journal: Tree Physiology, Volume 17 (8-9): 491-499 (1997), ISBN . DOI: 10.1093/treephys/17.8-9.491 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp