Publications

Publications Found: 1378

Quantifying Biogenic And Anthropogenic Contributions To Acetone Mixing Ratios In A Rural Environment
Goldstein, A. H., Schade, G. W.

Acetone was one of the most abundant volatile organic compounds (VOCs) observed in the Sierra Nevada Mountains (California, USA). Mixing ratios were measured hourly above a ponderosa pine plantation using an automated in situ dual-channel GC-FID system throughout July 1997, …


Journal: Atmospheric Environment, Volume 34 (29-30): 4997-5006 (2000), ISBN . DOI: 10.1016/s1352-2310(00)00321-6 Sites: US-Blo

Ozone Deposition To A Ponderosa Pine Plantation In The Sierra Nevada Mountains (CA): A Comparison Of Two Different Climatic Years
Bauer, M. R., Hultman, N. E., Panek, J. A., Goldstein, A. H.

Ponderosa pine is one of the most sensitive species to ozone and a dominant species in the Sierra Nevada Mountains. To assess the factors controlling ozone deposition to the forest and to study the forest …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 105 (D17): 22123-22136 (2000), ISBN . DOI: 10.1029/2000jd900168 Sites: US-Blo

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

Modelling Assimilation And Intercellular CO2 From Measured Conductance: A Synthesis Of Approaches
Katul, G. G., Ellsworth, D. S., Lai, C.

A spectrum of models that estimate assimilation rate A from intercellular carbon dioxide concentration (Ci) and measured stomatal conductance to CO2 (gc) were investigated using leaf-level gas exchange measurements. The gas exchange measurements were performed in a uniform loblolly …


Journal: Plant, Cell And Environment, Volume 23 (12): 1313-1328 (2000), ISBN . DOI: 10.1046/j.1365-3040.2000.00641.x Sites: US-Dk3

Remote Sensing Of Photosynthetic-Light-Use Efficiency Of Boreal Forest
Nichol, C. J., Huemmrich, K. F., Black, T., Jarvis, P. G., Walthall, C. L., Grace, J., Hall, F. G.

Using a helicopter-mounted portable spectroradiometer and continuous eddy covariance data we were able to evaluate the photochemical reflectance index (PRI) as an indicator of canopy photosynthetic light-use efficiency (LUE) in four boreal forest species during the Boreal …


Journal: Agricultural And Forest Meteorology, Volume 101 (2-3): 131-142 (2000), ISBN . DOI: 10.1016/s0168-1923(99)00167-7 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp

Effect Of Daily Minimum Temperature On Photosynthesis In Eastern Hemlock (Tsuga Canadensis L.) In Autumn And Winter
Hadley, J. L.


Journal: Arctic, Antarctic, And Alpine Research, Volume 32 (4): 368-374 (2000), ISBN . DOI: 10.2307/1552384 Sites: US-Ha2

Correcting Eddy-Covariance Flux Underestimates Over A Grassland
Twine, T., Kustas, W., Norman, J., Cook, D., Houser, P., Meyers, T., Prueger, J., Starks, P., Wesely, M.

Independent measurements of the major energy balance flux components are not often consistent with the principle of conservation of energy. This is referred to as a lack of closure of the surface energy balance. Most results in the literature have shown the sum of sensible …


Journal: Agricultural And Forest Meteorology, Volume 103 (3): 279-300 (2000), ISBN . DOI: 10.1016/s0168-1923(00)00123-4 Sites: US-LWW

Wintertime CO2 Efflux From Arctic Soils: Implications For Annual Carbon Budgets
Fahnestock, J. T., Jones, M. H., Welker, J. M.

Estimates of annual carbon loss from arctic tundra ecosystems are based nearly entirely on measurements taken during the growing season in part because of methodological limitations but also reflecting the assumption that respiration during winter is near zero. Measurements of CO2 flux during winter, however, indicate …


Journal: Global Biogeochemical Cycles, Volume 13 (3): 775-779 (1999), ISBN . DOI: 10.1029/1999gb900006 Sites: US-Upa

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

Photosynthetic Acclimation To Elevated Atmospheric CO2 Concentration In The Florida Scrub-Oak Species Quercus Geminata And Quercus Myrtifolia Growing In Their Native Environment
Li, J., Dijkstra, P., Hinkle, C. R., Wheeler, R. M., Drake, B. G.

Long-term effects of elevated CO2 concentration (ambient plus 350 μmol mol−1) on leaf photosynthetic acclimation of two species of a scrub-oak community, Quercus myrtifolia Willd. and Quercus geminata Small, were studied. Plants of both species were grown in open-top chambers in their natural …


Journal: Tree Physiology, Volume 19 (4-5): 229-234 (1999), ISBN . DOI: 10.1093/treephys/19.4-5.229 Sites: US-KS2