Publication Search
Fraser, C., Roulet, N., Lafleur, M.
Groundwater flow patterns and geochemistry were studied in the Mer Bleue bog, near Ottawa, Ontario, Canada. Groundwater flow patterns alternated between recharge, i.e. head gradients producing flow from the surface of the peatland to the deeper peat, and discharge, i.e. head gradients indicating flow from the deeper peat …
Journal: Journal Of Hydrology, Volume 246 (1-4): 142-154 (2001). DOI: 10.1016/s0022-1694(01)00362-6 Sites: CA-Mer
Law, B. E., Goldstein, A. H., Anthoni, P. M., Unsworth, M. H., Panek, J. A., Bauer, M. R., Fracheboud, J. M., Hultman, N.
We investigated key factors controlling mass and energy exchange by a young (6-year-old) ponderosa pine (Pinus ponderosa Laws.) plantation on the west side of the Sierra Nevada Mountains and an old-growth ponderosa pine forest (mix of 45- and 250-year-old trees) on the east side of the Cascade Mountains, from June through …
Journal: Tree Physiology, Volume 21 (5): 299-308 (2001). DOI: 10.1093/treephys/21.5.299 Sites: US-Me4, US-Me5
Amiro, B. D.
Disturbances by fire and harvesting are thought to regulate the carbon balance of the Canadian boreal forest over scales of several decades. However, there are few direct measurements …
Journal: Global Change Biology, Volume 7 (3): 253-268 (2001). DOI: 10.1046/j.1365-2486.2001.00398.x Sites: CA-SF2, CA-SF3
Wilson, K. B., Baldocchi, D. D., Hanson, P. J.
We used gas exchange techniques to estimate maximum rate of carboxylation (Vcmax), a measure of photosynthetic capacity, in the understory and upper crown of a closed deciduous forest over two seasons. There was extensive variability in photosynthetic capacity as a result of vertical canopy position, species type, …
Journal: Tree Physiology, Volume 20 (9): 565-578 (2000). DOI: 10.1093/treephys/20.9.565 Sites: US-WBW
Williams, M., Eugster, W., Rastetter, E. B., Mcfadden, J. P., Chapin, F. S.
Assessments of carbon (C) fluxes in the Arctic require detailed data on both how and why these fluxes vary across the landscape. Such assessments are complicated because tundra vegetation has diverse structure and function at both local and regional scales. To investigate this diversity, the Arctic Flux Study has used the eddy covariance …
Journal: Global Change Biology, Volume 6 (S1): 116-126 (2000). DOI: 10.1046/j.1365-2486.2000.06016.x Sites: US-Upa
Baldocchi, D. D., Law, B. E., Anthoni, P. M.
Information on mass and energy exchange at the soil surface under vegetation is a critical component of micrometeorological, climate, biogeochemical and hydrological models. Under sparse boreal and western conifer forests as much as 50% of incident solar energy reaches the soil surface. How this energy is partitioned into …
Journal: Agricultural And Forest Meteorology, Volume 102 (2-3): 187-206 (2000). DOI: 10.1016/s0168-1923(00)00098-8 Sites: CA-Ojp, US-Me4
Castro, M. S., Gholz, H. L., Clark, K. L., Steudler, P. A.
We examined the effects of forest harvesting on the net exchange of methane (CH4) between the atmosphere and sandy soils in two mature slash pine (Pinus elliottii Engelm. var. elliottii) plantations in northern Florida. Before each of the stem-only harvests, soils in these plantations were net sinks for CH4 …
Journal: Canadian Journal Of Forest Research, Volume 30 (10): 1534-1542 (2000). DOI: 10.1139/cjfr-30-10-1534 Sites: US-SP1, US-SP2, US-SP3, US-SP4
Law, B. E., Williams, M., Anthoni, P. M., Baldocchi, D. D., Unsworth, M. H.
We conducted ecosystem carbon and water vapour exchange studies in an old-growth Pinus ponderosaforest in the Pacific North-west region of the United States. The canopy is heterogeneous, with tall multiaged trees and an open, clumped canopy with low leaf area. Carbon assimilation can occur throughout relatively mild winters, …
Journal: Global Change Biology, Volume 6 (6): 613-630 (2000). DOI: 10.1046/j.1365-2486.2000.00339.x Sites: US-Me5
Song, J., Wesely, M. L., Coulter, R. L., Brandes, E. A.
A model framework for parameterized subgrid-scale surface fluxes (PASS) has been modified and applied as PASS1 to use satellite data, models, and limited surface observations to infer root-zone available moisture (RAM) content with high spatial resolution over large terrestrial areas. Data collected during the 1997 Cooperative Atmosphere–Surface …
Journal: Journal Of Hydrometeorology, Volume 1 (5): 447-461 (2000). DOI: 10.1175/1525-7541(2000)001<0447:EWEWPP>2.0.CO;2 Sites: US-Wlr
Nichol, C. J., Huemmrich, K. F., Black, T., Jarvis, P. G., Walthall, C. L., Grace, J., Hall, F. G.
Using a helicopter-mounted portable spectroradiometer and continuous eddy covariance data we were able to evaluate the photochemical reflectance index (PRI) as an indicator of canopy photosynthetic light-use efficiency (LUE) in four boreal forest species during the Boreal …
Journal: Agricultural And Forest Meteorology, Volume 101 (2-3): 131-142 (2000). DOI: 10.1016/s0168-1923(99)00167-7 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp
