Journal: Ecological Applications, Volume 11 (5): 1395-1411 (2001), ISBN . DOI: 10.2307/3060928 Sites: CA-Man, CA-Obs
Tower and aircraft data from a number of field studies are analyzed to: (1) estimate the roughness lengths for local and area-averaged momentum fluxes over various surface types; (2) examine the applicability of the ψ-stability formulations of Paulson and Dyer for momentum fluxes; (3) investigate the possibility …
Journal: Agricultural And Forest Meteorology, Volume 108 (4): 265-279 (2001), ISBN . DOI: 10.1016/s0168-1923(01)00250-7 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp, CA-SJ3
Journal: Tree Physiology, Volume 21 (12-13): 925-929 (2001), ISBN . DOI: 10.1093/treephys/21.12-13.925 Sites: CA-Obs
Boreal black spruce forests typically have a dense ground cover of bryophytes. The two main bryophyte groups in boreal black spruce forests, feathermoss and Sphagnum, have ecophysiological characteristics that influence …
Journal: Oecologia, Volume 129 (2): 261-270 (2001), ISBN . DOI: 10.1007/s004420100719 Sites: CA-Obs
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), ISBN . DOI: 10.1016/s0168-1923(99)00167-7 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp
This paper shows the results of solar flux measurements routinely collected within boreal conifer forests during BOREAS 1994. Such vegetation have open canopies with a high level of clumping and covered by crowns which yields strong directional effects on the spectral hemispherical …
Journal: Agricultural And Forest Meteorology, Volume 93 (1): 1-6 (1999), ISBN . DOI: 10.1016/s0168-1923(98)00110-5 Sites: CA-Obs, CA-Ojp
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), ISBN . DOI: 10.1139/cjfr-29-10-1528 Sites: CA-Obs, CA-SF2, CA-SF3
Forest biomes are major reserves for terrestrial carbon, and major components of global primary productivity. The carbon balance of forests is determined by a number of component …
Journal: Plant, Cell And Environment, Volume 22 (6): 715-740 (1999), ISBN . DOI: 10.1046/j.1365-3040.1999.00453.x Sites: CA-Obs, US-WBW
Journal: Tree Physiology, Volume 19 (11): 695-706 (1999), ISBN . DOI: 10.1093/treephys/19.11.695 Sites: CA-Man, CA-Obs, CA-Ojp
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), ISBN . DOI: 10.1016/s0034-4257(99)00032-2 Sites: CA-Obs, CA-Ojp