Publications

Publications Found: 1378

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), ISBN . DOI: 10.1029/1999jd900102 Sites: US-Ha1

In Situ Measurements Of C2 -C10 Volatile Organic Compounds Above A Sierra Nevada Ponderosa Pine Plantation
Lamanna, M. S., Goldstein, A. H.

A fully automated gas chromatograph-flame ionization detector system was designed and built to measure ambient concentrations of C2-C10 volatile organic compounds, including many oxygenated compounds, without using liquid cryogen. It was deployed at Blodgett Forest Research Station in Georgetown, California, …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 104 (D17): 21247-21262 (1999), ISBN . DOI: 10.1029/1999jd900289 Sites: US-Blo

An Approach To Spatially Distributed Modeling Of Net Primary Production (NPP) At The Landscape Scale And Its Application In Validation Of EOS NPP Products
Reich, P. B., Turner, D. P., Bolstad, P.

Substantial research seeks to improve estimates of ecosystem processes and fluxes at a range of scales, notably from the stand scale (<1 km2) using ecosystem physiology and eddy covariance techniques, to the landscape (∼102 km2) and …


Journal: Remote Sensing Of Environment, Volume 70 (1): 69-81 (1999), ISBN . DOI: 10.1016/s0034-4257(99)00058-9 Sites: CA-Man, US-KFB, US-Kon

Effects Of Climatic Variability On The Annual Carbon Sequestration By A Boreal Aspen Forest
Chen, W. J., Black, T. A., Yang, P. C., Barr, A. G., Neumann, H. H., Nesic, Z., Blanken, P. D., Novak, M. D., Eley, J., Ketler, R. J., Cuenca, R.

To evaluate the carbon budget of a boreal deciduous forest, we measured CO2 fluxes using the eddy covariance technique above an old aspen (OA) forest in Prince Albert National Park, Saskatchewan, Canada, in 1994 and 1996 as part of the Boreal Ecosystem-Atmosphere Study (BOREAS). We found that the OA forest is a strong …


Journal: Global Change Biology, Volume 5 (1): 41-53 (1999), ISBN . DOI: 10.1046/j.1365-2486.1998.00201.x Sites: CA-Oas

Interacting Influence Of Mycorrhizal Symbiosis And Competition On Plant Diversity In Tallgrass Prairie
Smith, M. D., Hartnett, D. C., Wilson, G. W.

In tallgrass prairie, plant species interactions regulated by their associated mycorrhizal fungi may be important forces that influence species coexistence and community structure; however, the mechanisms and magnitude of these interactions remain unknown. The objective of this study was to determine how interspecific competition, …


Journal: Oecologia, Volume 121 (4): 574-582 (1999), ISBN . DOI: 10.1007/s004420050964 Sites: US-KFB, US-Kon

Seasonal Patterns And Environmental Control Of Carbon Dioxide And Water Vapour Exchange In An Ecotonal Boreal Forest
Hollinger, D. Y., Goltz, S. M., Davidson, E. A., Lee, J. T., Tu, K., Valentine, H. T.

Carbon dioxide, water vapour, and sensible heat fluxes were measured above and within a spruce dominated forest near the southern ecotone of the boreal forest in Maine, USA. Summer, mid-day carbon dioxide uptake was higher than at other boreal coniferous forests, averaging about – 13 μmol CO2 m–2 s–1. …


Journal: Global Change Biology, Volume 5 (8): 891-902 (1999), ISBN . DOI: 10.1046/j.1365-2486.1999.00281.x Sites: US-Ho1

Effects Of CO2 Enrichment On The Photosynthetic Light Response Of Sun And Shade Leaves Of Canopy Sweetgum Trees (Liquidambar Styraciflua) In A Forest Ecosystem
Herrick, J. D., Thomas, R. B.

To investigate whether sun and shade leaves respond differently to CO2 enrichment, we examined photosynthetic light response of sun and shade leaves in canopy sweetgum (Liquidambar styraciflua L.) trees growing at ambient and elevated (ambient + 200 μl l−1) atmospheric CO2 in the Brookhaven …


Journal: Tree Physiology, Volume 19 (12): 779-786 (1999), ISBN . DOI: 10.1093/treephys/19.12.779 Sites: US-Dk3

Phenology And Productivity Of Saw Palmetto ( Serenoa Repens ) In A North Florida Slash Pine Plantation
Gholz, H. L., Guerin, D. N., Cropper, W. P.

Phenological observations were used in conjunction with destructive sampling and measurements of plant cover to determine the aboveground seasonal dynamics, annual aboveground …


Journal: Canadian Journal Of Forest Research, Volume 29 (8): 1248-1253 (1999), ISBN . DOI: 10.1139/cjfr-29-8-1248 Sites: US-SP1, US-SP2, US-SP3, US-SP4

Modeling BRFAnd Radiation Regime Of Boreal And Tropical Forests
Gastellu-Etchegorry, J., Guillevic, P., Zagolski, F., Demarez, V., Trichon, V., Deering, D., Leroy, M.

Monitoring of forest evolution and functioning with remote sensing depends on canopy BRF (bidirectional reflectance factor) sensitivity to biophysical parameters and to canopy PAR (photosynthetically active radiation) regime. Here, we study the canopy BRF of a tropical (Sumatra) …


Journal: Remote Sensing Of Environment, Volume 68 (3): 281-316 (1999), ISBN . DOI: 10.1016/s0034-4257(98)00119-9 Sites: CA-Oas, CA-Obs, CA-Ojp

Relationships Between Leaf Area Index And Landsat TM Spectral Vegetation Indices Across Three Temperate Zone Sites
Turner, D. P., Cohen, W. B., Kennedy, R. E., Fassnacht, K. S., Briggs, J. M.

Mapping and monitoring of leaf area index (LAI) is important for spatially distributed modeling of vegetation productivity, evapotranspiration, and surface energy balance. Global LAI surfaces will be an early product of the MODIS Land Science Team, and the requirements for …


Journal: Remote Sensing Of Environment, Volume 70 (1): 52-68 (1999), ISBN . DOI: 10.1016/s0034-4257(99)00057-7 Sites: US-KFB, US-Kon