Journal: Hydrological Processes, Volume 12: 2163-2183 (1998), ISBN . DOI: Sites: US-HVs
Journal: The Journal Of Ecology, Volume 85 (5): 575-590 (1997), ISBN . DOI: 10.2307/2960529 Sites: US-Upa
We used an automated, multiplexing gas-exchange system to measure the net exchange of CO2 at the surfaces of three shady feather moss and three exposed sphagnum moss sites in a black spruce forest during 35 days at the end of the 1995 growing season. Midday gross photosynthesis was 0.5 to 1.0 μmol m−2 s−1 …
Journal: Tree Physiology, Volume 17 (8-9): 537-542 (1997), ISBN . DOI: 10.1093/treephys/17.8-9.537 Sites: CA-Obs
The objectives of this study are to (1) characterize the carbon (C) content, leaf area index, and aboveground net primary production (ANPP) for mature aspen, black spruce, and young and mature jack pine stands at the southern and northern Boreal Ecosystem-Atmosphere Study (BOREAS) areas and (2) compare net primary production and …
Journal: Journal Of Geophysical Research: Atmospheres, Volume 102 (D24): 29029-29041 (1997), ISBN . DOI: 10.1029/97jd02317 Sites: CA-SJ3
A process-based, general ecosystem model (BIOME–BGC) was used to simulate daily gross primary production, maintenance and heterotrophic respiration, net primary production and net ecosystem carbon exchange of boreal aspen, jack pine and black spruce stands. Model simulations of daily net carbon exchange of the ecosystem (NEE) explained …
Journal: Tree Physiology, Volume 17 (8-9): 589-599 (1997), ISBN . DOI: 10.1093/treephys/17.8-9.589 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp
We investigated controls over the emission of monoterpenes from two species of boreal forest conifers, black spruce (Picea mariana Miller (B.S.P.)) and jack pine (Pinus banksiana Lamb). Monoterpenes are important in plants as carbon-based defensive compounds and in the atmosphere as photochemically reactive compounds …
Journal: Tree Physiology, Volume 17 (8-9): 563-569 (1997), ISBN . DOI: 10.1093/treephys/17.8-9.563 Sites: CA-Oas, CA-Obs, CA-Ojp
We used eddy covariance to measure the net exchange of CO2 between the atmosphere and a black spruce (Picea mariana) forest in Manitoba for 16,500 hours from March 16, 1994 to October 31, 1996. We then partitioned net exchange into gross photosynthesis and respiration by estimating daytime respiration as a function …
Journal: Journal Of Geophysical Research: Atmospheres, Volume 102 (D24): 28987-28996 (1997), ISBN . DOI: 10.1029/97jd01111 Sites: CA-Obs
In summer 1992, isoprene emission was measured on intact leaves and branches of Quercus alba (L.) at two heights in a forest canopy. Isoprene emission capacity (measured at 30 °C and a photosynthetic photon flux density of 1000 μmol m−2 s−1) was significantly higher in sun leaves than in shade …
Journal: Tree Physiology, Volume 17 (11): 705-714 (1997), ISBN . DOI: 10.1093/treephys/17.11.705 Sites: US-WBW
Root biomass, net primary production and turnover were studied in aspen, jack pine and black spruce forests in two contrasting climates. The climate of the Southern Study Area (SSA) near Prince Albert, Saskatchewan is warmer and drier in the summer and milder in the winter than the Northern Study Area (NSA) near Thompson, Manitoba, …
Journal: Tree Physiology, Volume 17 (8-9): 577-587 (1997), ISBN . DOI: 10.1093/treephys/17.8-9.577 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp
A canopy Lagrangian turbulent scalar transport model for predicting scalar fluxes, sources, and sinks within a forested canopy was tested using CO2 concentration and flux measurements. The model formulation is based on the localized near-field theory (LNF) proposed by Raupach [1989a, b]. Using the measured mean …
Journal: Journal Of Geophysical Research: Atmospheres, Volume 102 (D8): 9309-9321 (1997), ISBN . DOI: 10.1029/96jd03785 Sites: US-Dk3