Canopy level flux measurements of 2-methyl-3-buten-2-ol (MBO) were made over a 7 year old ponderosa pine plantation in the Sierra Nevada range of California using the relaxed eddy accumulation method. Fluxes …
Journal: Journal Of Geophysical Research: Atmospheres, Volume 104 (D21): 26107-26114 (1999). DOI: 10.1029/1999jd900749 Sites: US-Blo
Below-canopy eddy covariance measurements of CO2 flux (Fcb) and soil surface CO2flux measurements (Fs) were made seasonally in a ponderosa pine forest in central Oregon in 1996 and 1997. The forest ecosystem has …
Journal: Agricultural And Forest Meteorology, Volume 94 (3-4): 171-188 (1999). DOI: 10.1016/s0168-1923(99)00019-2 Sites: US-Me4
A new approach is presented for deriving vegetation canopy structural characteristics from hyperspectral bidirectional reflectance distribution function (BRDF) data. The methodology is based on the relationship between spectral variability of BRDF effects and canopy geometry. …
Journal: Remote Sensing Of Environment, Volume 69 (3): 281-295 (1999). DOI: 10.1016/s0034-4257(99)00032-2 Sites: CA-Obs, CA-Ojp
Journal: Tree Physiology, Volume 19 (11): 695-706 (1999). DOI: 10.1093/treephys/19.11.695 Sites: CA-Man, CA-Obs, CA-Ojp
Interactions between elevated CO2 and N cycling were explored with a nutrient cycling model (NuCM, Johnson et al. 1993, 1995) for a Pinus taeda L. site at Duke University, North Carolina, and a mixed deciduous site at Walker Branch, Tennessee. The simulations tested whether N limitation would prevent growth increases …
Journal: Tree Physiology, Volume 19 (4-5): 321-327 (1999). DOI: 10.1093/treephys/19.4-5.321 Sites: US-Dk3
Four large cuvettes were used to measure whole-branch CO2 and H2O vapour exchange at the Boreal Ecosystem-Atmosphere Study, Southern Study Area, Old Black Spruce site. Measurements started before the spring thaw and continued until after the winter freeze-up. Daytime photosynthesis, nighttime respiration, transpiration …
Journal: Canadian Journal Of Forest Research, Volume 29 (10): 1528-1538 (1999). DOI: 10.1139/cjfr-29-10-1528 Sites: CA-Obs, CA-SF2, CA-SF3
Climatological measurements, including carbon dioxide flux density, were made from May to September 1994 and from May to November 1996 at a young jack pine (Pinus banksiana Lamb.) forest near Thompson, …
Journal: Journal Of Geophysical Research: Atmospheres, Volume 104 (D22): 27641-27652 (1999). DOI: 10.1029/1999jd900368 Sites: CA-Man
A one-dimensional canopy model was developed to study photochemical processes inside and above a mixed deciduous forest in southern Ontario. The Eulerian model made use of Lagrangian dispersion principles …
Journal: Journal Of Geophysical Research: Atmospheres, Volume 104 (D3): 3581-3603 (1999). DOI: 10.1029/1998jd100065 Sites: CA-Cbo
There is much uncertainty about the net carbon (C) exchange of boreal forest ecosystems, although this exchange may be an important part of global C dynamics. To resolve this uncertainty, net C exchange has …
Journal: Journal Of Geophysical Research: Atmospheres, Volume 104 (D22): 27699-27717 (1999). DOI: 10.1029/1998jd200117 Sites: CA-Oas
Journal: Ecological Applications, Volume 9 (3): 936-948 (1999). DOI: 10.2307/2641340 Sites: US-SP1, US-SP2, US-SP3, US-SP4