Simultaneous measurements of net ecosystem CO2 exchange (NEE) were made in a Florida scrub-oak ecosystem in August 1997 and then every month between April 2000 to …
Journal: Global Change Biology, Volume 9 (1): 84-95 (2003), ISBN . DOI: 10.1046/j.1365-2486.2003.00561.x Sites: US-KS1, US-KS2
The weather patterns of the west side of the Sierra Nevada Mountains (cold, wet winters and hot, dry summers) strongly influence how water is partitioned between transpiration and evaporation and result in a specific strategy of water use by ponderosa pine trees (Pinus …
Journal: Agricultural And Forest Meteorology, Volume 117 (3-4): 173-192 (2003), ISBN . DOI: 10.1016/s0168-1923(03)00062-5 Sites: US-Blo
In order to evaluate factors controlling transpiration of six common eastern deciduous species in North America, a model describing responses of canopy stomatal conductance (GS) to net radiation (RN), vapor pressure deficit (D) and relative extractable soil water (REW) was parameterized …
Journal: Advances In Water Resources, Volume 26 (12): 1267-1278 (2003), ISBN . DOI: 10.1016/j.advwatres.2003.08.001 Sites: US-Dk2
Tropospheric ozone (O3) effectively deposits to forested ecosystems but the fate of O3 within the forest canopy is unresolved. We partitioned total measured ecosystem daytime O3 deposition to a ponderosa pine (Pinus ponderosa) forest into its major loss pathways; stomatal uptake, non-stomatal …
Journal: Geophysical Research Letters, Volume 30 (7): n/a-n/a (2003), ISBN . DOI: 10.1029/2002gl016785 Sites: US-Blo
The 18O content of atmospheric O2 is an important tracer for past changes in the biosphere. Its quantitative use depends on knowledge of the discrimination against 18O associated with the various O2 consumption processes. Here we evaluated, for the first time, the in situ 18O …
Journal: Global Biogeochemical Cycles, Volume 17 (3): n/a-n/a (2003), ISBN . DOI: 10.1029/2003gb002056 Sites: US-LPH
There is growing evidence that plant stomata have evolved physiological controls to satisfy the demand for CO2 by photosynthesis while regulating water losses by …
Journal: Plant, Cell And Environment, Volume 26 (3): 339-350 (2003), ISBN . DOI: 10.1046/j.1365-3040.2003.00965.x Sites: US-Dk1, US-Dk2, US-Dk3
Vegetation light use efficiency is a key physiological parameter at the canopy scale, and at the daily time step is a component of remote sensing algorithms for scaling gross …
Journal: Global Change Biology, Volume 9 (3): 383-395 (2003), ISBN . DOI: 10.1046/j.1365-2486.2003.00573.x Sites: CA-Obs, US-Bo1, US-Bo2, US-Ha2, US-KFB, US-Kon
Journal: Tree Physiology, Volume 23 (7): 433-442 (2003), ISBN . DOI: 10.1093/treephys/23.7.433 Sites: US-Dk3
There is considerable interest in assessing the magnitude of carbon sources and sinks for agricultural lands, grasslands, and forests. In this paper, we propose a novel technique to remotely assess CO2 fluxes in maize using reflectances (ρ) in two spectral channels either in the green around 550 nm or in the red edge …
Journal: Geophysical Research Letters, Volume 30 (9): 1486-n/a (2003), ISBN . DOI: 10.1029/2002gl016543 Sites: US-Ne3
Year-round eddy covariance flux measurements were made in a native tallgrass prairie in north-central Oklahoma, USA during 1997–2000 to quantify carbon exchange and its interannual …
Journal: Global Change Biology, Volume 9 (2): 255-265 (2003), ISBN . DOI: 10.1046/j.1365-2486.2003.00567.x Sites: US-Shd