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
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), ISBN . 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), ISBN . 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), ISBN . DOI: 10.1029/1998jd200117 Sites: CA-Oas
Journal: Ecological Applications, Volume 9 (3): 936-948 (1999), ISBN . DOI: 10.2307/2641340 Sites: US-SP1, US-SP2, US-SP3, US-SP4
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
The combination of isotopic measurements and micrometeorological flux measurements is a powerful new approach that will likely lead to new insight into the dynamics of CO2 exchange between terrestrial …
Journal: Global Biogeochemical Cycles, Volume 13 (4): 903-922 (1999), ISBN . DOI: 10.1029/1999gb900072 Sites: US-WBW
Measurements of isoprene concentration and flux were made at a mixed deciduous forest in southern Canada during 1995 to characterize diel and seasonal emissions and thus deduce annual inventories. Isoprene …
Journal: Ecological Applications, Volume 9 (4): 1118-1131 (1999), ISBN . DOI: 10.1890/1051-0761(1999)009[1118:otsoie]2.0.co;2 Sites: CA-Cbo
The micrometeorological flux measurement technique known as relaxed eddy accumulation (REA) holds promise as a powerful new tool for ecologists. The more popular eddy covariance (eddy correlation) technique requires the use of sensors that can respond at fast rates (10 Hz), and these are unavailable for many ecologically relevant …
Journal: Oecologia, Volume 116 (3): 306-315 (1998), ISBN . DOI: 10.1007/s004420050592 Sites: US-WBW
How eco-physiological, biogeochemical and micrometeorological theory can be used to compute biosphere–atmosphere, trace gas exchange rates is discussed within the framework of a process model. The accuracy of the theory is tested by comparing computations of mass and energy flux densities (water vapor, sensible heat, CO2 …
Journal: Agricultural And Forest Meteorology, Volume 90 (1-2): 1-25 (1998), ISBN . DOI: 10.1016/s0168-1923(97)00072-5 Sites: US-WBW