Publications

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Publications Found: 46

Transpiration And Whole-Tree Conductance In Ponderosa Pine Trees Of Different Heights
Ryan, M. G., Bond, B. J., Law, B. E., Hubbard, R. M., Woodruff, D., Cienciala, E., Kucera, J.

Changes in leaf physiology with tree age and size could alter forest growth, water yield, and carbon fluxes. We measured tree water flux (Q) for 14 ponderosa pine trees in two size classes (12 m tall and ∼40 years old, …


Journal: Oecologia, Volume 124 (4): 553-560 (2000), ISBN . DOI: 10.1007/s004420000403 Sites: US-Me4

On Measuring And Modeling Energy Fluxes Above The Floor Of A Homogeneous And Heterogeneous Conifer Forest
Baldocchi, D. D., Law, B. E., Anthoni, P. M.

Information on mass and energy exchange at the soil surface under vegetation is a critical component of micrometeorological, climate, biogeochemical and hydrological models. Under sparse boreal and western conifer forests as much as 50% of incident solar energy reaches the soil surface. How this energy is partitioned into …


Journal: Agricultural And Forest Meteorology, Volume 102 (2-3): 187-206 (2000), ISBN . DOI: 10.1016/s0168-1923(00)00098-8 Sites: CA-Ojp, US-Me4

Carbon And Water Vapor Exchange Of An Open-Canopied Ponderosa Pine Ecosystem
Anthoni, P. M., Law, B. E., Unsworth, M. H.

Eddy covariance measurements of carbon dioxide and water vapor exchange were made above a ponderosa pine (Pinus ponderosa Dougl. ex P. and C. Laws.) forest located in a semiarid environment in central Oregon. The stand is a mixture of old-growth and young trees. Annual net carbon gain by the ecosystem (NEE) was 320 ± 170 gC m−2year−1


Journal: Agricultural And Forest Meteorology, Volume 95 (3): 151-168 (1999), ISBN . DOI: 10.1016/s0168-1923(99)00029-5 Sites: US-Me4

Seasonal And Annual Respiration Of A Ponderosa Pine Ecosystem
Law, B. E., Ryan, M. G., Anthoni, P. M.

The net ecosystem exchange of CO2 between forests and the atmosphere, measured by eddy covariance, is the small difference between two large fluxes of photosynthesis and respiration. Chamber measurements of soil surface CO2 efflux (Fs), wood respiration (Fw) and foliage respiration (Ff) …


Journal: Global Change Biology, Volume 5 (2): 169-182 (1999), ISBN . DOI: 10.1046/j.1365-2486.1999.00214.x Sites: US-Me4

Below-Canopy And Soil CO2 Fluxes In A Ponderosa Pine Forest
Law, B., Baldocchi, D., Anthoni, P.

Below-canopy eddy covariance measurements of CO2 flux (Fcb) and soil surface CO2flux measurements (Fs) were made seasonally in a ponderosa pine forest in central Oregon in 1996 and 1997. The forest ecosystem has …


Journal: Agricultural And Forest Meteorology, Volume 94 (3-4): 171-188 (1999), ISBN . DOI: 10.1016/s0168-1923(99)00019-2 Sites: US-Me4

Estimation Of Leaf Area Index And Light Intercepted By Shrubs From Digital Videography
Law, B. E.

The development of digital videography has generated interest in the use of these instruments to estimate vegetation variables such as leaf area index (LAI) and light intercepted (fIPAR) by shrubs in shrublands and open forest canopies. The objective of this …


Journal: Remote Sensing Of Environment, Volume 51 (2): 276-280 (1995), ISBN . DOI: 10.1016/0034-4257(94)00054-q Sites: US-Me4