Publications

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Publications Found: 70

The Use Of Relaxed Eddy Accumulation To Measure Biosphere-Atmosphere Exchange Of Isoprene And Other Biological Trace Gases
Bowling, D. R., Turnipseed, A. A., Delany, A. C., Baldocchi, D. D., Greenberg, J. P., Monson, R. K.

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

Measuring And Modelling Carbon Dioxide And Water Vapour Exchange Over A Temperate Broad-Leaved Forest During The 1995 Summer Drought
Baldocchi, D.

Forests in the south-eastern United States experienced a prolonged dry spell and above-normal temperatures during the 1995 growing season. During this episode, nearly continuous, …


Journal: Plant, Cell And Environment, Volume 20 (9): 1108-1122 (1997), ISBN . DOI: 10.1046/j.1365-3040.1997.d01-147.x Sites: US-WBW

Environmental Controls Over Isoprene Emission In Deciduous Oak Canopies
Harley, P., Guenther, A., Zimmerman, P.

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

Seasonal Variations Of CO2 And Water Vapour Exchange Rates Over A Temperate Deciduous Forest
Greco, S., Baldocchi, D. D.

Long-term and direct measurements of CO2 and water vapour exchange are needed over forested ecosystems to determine their net annual fluxes of carbon dioxide and water. Such measurements are also needed to parameterize and test biogeochemical, ecological and hydrological assessment models. Responding to this need, eddy …


Journal: Global Change Biology, Volume 2 (3): 183-197 (1996), ISBN . DOI: 10.1111/j.1365-2486.1996.tb00071.x Sites: US-WBW

Energy And CO2 Flux Densities Above And Below A Temperate Broad-Leaved Forest And A Boreal Pine Forest
Baldocchi, D. D., Vogel, C. A.

Fluxes of carbon dioxide, water vapor and energy were measured above and below a temperate broad-leaved forest and a boreal jack pine (Pinus banksiania Lamb.) forest by the eddy covariance method. The aim of the work was to examine differences between the biological and physical processes that control the fluxes of mass …


Journal: Tree Physiology, Volume 16 (1-2): 5-16 (1996), ISBN . DOI: 10.1093/treephys/16.1-2.5 Sites: US-WBW

Scaling Carbon Dioxide And Water Vapour Exchange From Leaf To Canopy In A Deciduous Forest. I. Leaf Model Parametrization
Harley, P. C., Baldocchi, D. D.

In order to parametrize a leaf submodel of a canopy level gas-exchange model, a series of photosynthesis and stomatal conductance measurements were made on leaves of white …


Journal: Plant, Cell And Environment, Volume 18 (10): 1146-1156 (1995), ISBN . DOI: 10.1111/j.1365-3040.1995.tb00625.x Sites: US-WBW

Scaling Carbon Dioxide And Water Vapour Exchange From Leaf To Canopy In A Deciduous Forest. II. Model Testing And Application
Baldocchi, D. D., Harley, P. C.

The scaling of CO2 and water vapour transfer from leaf to canopy dimensions was achieved by integrating mechanistic models for physiological (photosynthesis, stomatal …


Journal: Plant, Cell And Environment, Volume 18 (10): 1157-1173 (1995), ISBN . DOI: 10.1111/j.1365-3040.1995.tb00626.x Sites: US-WBW

Trace Gas Exchange Above The Floor Of A Deciduous Forest: 1. Evaporation And CO2 Efflux
Baldocchi, D. D., Meyers, T. P.

The eddy correlation method has great potential for directly measuring trace gas fluxes at the floor of a forest canopy, but a thorough validation study has not been yet conducted. Another appeal of the eddy …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 96 (D4): 7271-7285 (1991), ISBN . DOI: 10.1029/91jd00269 Sites: US-WBW

A comparison of direct and indirect methods for estimating forest canopy leaf area
Chason, J. Huston, M. D. D. Baldocchi

Two indirect gap fraction methods for estimating leaf area index (LAI) are compared with estimates
from litterfall collections in a mixed-age oak-hickory forest. One indirect method uses averaged,
direct beam penetration data obtained with a moving tram. The second uses a portable light
sensor system that measures diffuse light …


Journal: Agricultural Forest Meteorology, Volume 57: 107-128 (1991), ISBN . DOI: https://doi.org/10.1016/0168-1923(91)90081-Z Sites: US-WBW

Turbulent Transfer In A Deciduous Forest
Baldocchi, D. D.
Carbon dioxide, water vapor and other passive scalars are physically transferred between a plant canopy and the atmosphere by turbulence. Intense and intermittent sweep and ejection events transfer most of the mass. Although the capacity for turbulence to transfer material is high, mass transfer is coupled …


Journal: Tree Physiology, Volume 5 (3): 357-377 (1989), ISBN . DOI: 10.1093/treephys/5.3.357 Sites: US-WBW