Publications

Publications Found: 1437

Simulated Nitrogen Cycling Response To Elevated CO2 In Pinus Taeda And Mixed Deciduous Forests
Johnson, D. W.

Interactions between elevated CO2 and N cycling were explored with a nutrient cycling model (NuCM, Johnson et al. 1993, 1995) for a Pinus taeda L. site at Duke University, North Carolina, and a mixed deciduous site at Walker Branch, Tennessee. The simulations tested whether N limitation would prevent growth increases …


Journal: Tree Physiology, Volume 19 (4-5): 321-327 (1999). DOI: 10.1093/treephys/19.4-5.321 Sites: US-Dk3

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). DOI: 10.1016/s0168-1923(99)00029-5 Sites: US-Me4

Influence Of Biotic Exchange And Combustion Sources On Atmospheric CO2 Concentrations In New England From Observations At A Forest Flux Tower
Potosnak, M. J., Wofsy, S. C., Denning, A. S., Conway, T. J., Munger, J. W., Barnes, D. H.

Hourly data for concentrations and fluxes of CO2 at 30 m in Harvard Forest (Petersham, Massachusetts) are analyzed using linear modeling to obtain regionally representative CO2 concentrations …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 104 (D8): 9561-9569 (1999). DOI: 10.1029/1999jd900102 Sites: US-Ha1

Structure Analysis And Classification Of Boreal Forests Using Airborne Hyperspectral BRDF Data From ASAS
Sandmeier, S., Deering, D.

A new approach is presented for deriving vegetation canopy structural characteristics from hyperspectral bidirectional reflectance distribution function (BRDF) data. The methodology is based on the relationship between spectral variability of BRDF effects and canopy geometry. …


Journal: Remote Sensing Of Environment, Volume 69 (3): 281-295 (1999). DOI: 10.1016/s0034-4257(99)00032-2 Sites: CA-Obs, CA-Ojp

Relationship Between Ecosystem Productivity And Photosynthetically Active Radiation For Northern Peatlands
Frolking, S. E., Bubier, J. L., Moore, T. R., Ball, T., Bellisario, L. M., Bhardwaj, A., Carroll, P., Crill, P. M., Lafleur, P. M., McCaughey, J. H., Roulet, N. T., Suyker, A. E., Verma, S. B., Waddington, J. M., Whiting, G. J.

We analyzed the relationship between net ecosystem exchange of carbon dioxide (NEE) and irradiance (as photosynthetic photon flux density or PPFD), using published and unpublished data that have been collected during midgrowing season for carbon balance studies at seven peatlands in North America and Europe. NEE measurements included …


Journal: Global Biogeochemical Cycles, Volume 12 (1): 115-126 (1998). DOI: 10.1029/97gb03367 Sites: CA-Mer

Contributions Of Interacting Biological Mechanisms To Soil Aggregate Stabilization In Restored Prairie
Jastrow, J., Miller, R., Lussenhop, J.

A better understanding of the soil aggregation process is needed to address a variety of concerns, including soil quality and erosion, agricultural sustainability, soil C sequestration, the mobility of hazardous chemicals and remediation of contaminated sites. We used data …


Journal: Soil Biology And Biochemistry, Volume 30 (7): 905-916 (1998). DOI: 10.1016/s0038-0717(97)00207-1 Sites: US-IB1, US-IB2

On Using Eco-Physiological, Micrometeorological And Biogeochemical Theory To Evaluate Carbon Dioxide, Water Vapor And Trace Gas Fluxes Over Vegetation: A Perspective
Baldocchi, D., Meyers, T.

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). DOI: 10.1016/s0168-1923(97)00072-5 Sites: US-WBW

Relationships Of Leaf Dark Respiration To Leaf Nitrogen, Specific Leaf Area And Leaf Life-Span: A Test Across Biomes And Functional Groups
Reich, P. B., Walters, M. B., Ellsworth, D. S., Vose, J. M., Volin, J. C., Gresham, C., Bowman, W. D.

Based on prior evidence of coordinated multiple leaf trait scaling, we hypothesized that variation among species in leaf dark respiration rate (Rd) should scale with variation in traits such as leaf nitrogen (N), leaf life-span, specific leaf area (SLA), and net photosynthetic capacity …


Journal: Oecologia, Volume 114 (4): 471-482 (1998). DOI: 10.1007/s004420050471 Sites: US-NR1

Climatology Of Gravity Waves In A Forest
Lee, X., Barr, A. G.

The objectives of this study are to establish a climatology of gravity waves in a forest and to gain insights into the dynamics of this motion type. The site is part of the BOREAS (Boreal Ecosystem—Atmosphere Study) flux monitoring network. The analysis relies mainly on 5 Hz temperature time series observed with two arrays of fine-wire …


Journal: Quarterly Journal Of The Royal Meteorological Society, Volume 124 (549): 1403-1419 (1998). DOI: 10.1002/qj.49712454904 Sites: CA-Cbo

Characteristics of energy and water budgets over wet sedge and tussock tundra ecosystems at North Slope in Alaska
Harazono Y, Yoshimoto M, Mano M Vourlitis V, Oechel W


Journal: Hydrological Processes, Volume 12: 2163-2183 (1998). DOI: Sites: US-HVs