Publications

Publications Found: 1437

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). DOI: 10.1046/j.1365-2486.1998.00201.x Sites: CA-Oas

Canopy Fluxes Of 2-Methyl-3-Buten-2-Ol Over A Ponderosa Pine Forest By Relaxed Eddy Accumulation: Field Data And Model Comparison
Baker, B., Guenther, A., Greenberg, J., Goldstein, A., Fall, R.

Canopy level flux measurements of 2-methyl-3-buten-2-ol (MBO) were made over a 7 year old ponderosa pine plantation in the Sierra Nevada range of California using the relaxed eddy accumulation method. Fluxes …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 104 (D21): 26107-26114 (1999). DOI: 10.1029/1999jd900749 Sites: US-Blo

Effect Of Spring Burning On The Surface Energy Balance In A Tallgrass Prairie
Bremer, D. J., Ham, J. M.

Spring burning of dead biomass in tallgrass prairie is a common practice that may influence heat and water vapor transport from the landscape. Bowen ratio methods were used to measure the surface energy balances and evapotranspiration (ET) from burned (B) and unburned (UB) prairie near Manhattan, KS, USA. Data were collected from …


Journal: Agricultural And Forest Meteorology, Volume 97 (1): 43-54 (1999). DOI: 10.1016/s0168-1923(99)00034-9 Sites: US-KFB, US-Kon

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). DOI: 10.1016/s0034-4257(99)00057-7 Sites: US-KFB, US-Kon

Eddy Covariance Measurements Of CO2 And Energy Fluxes Of An Alaskan Tussock Tundra Ecosystem
Vourlitis, G. L., Oechel, W. C.

Eddy covariance was used to measure the net CO2 exchange and energy balance of a moist-tussock tundra ecosystem at Happy Valley, Alaska (69°08.54′ N, 148°50.47′ W), during the 1994–1995 growing seasons (June–August). The system operated for 75–95% of the time, and energy balance closure was within 5%, indicating …


Journal: Ecology, Volume 80 (2): 686-701 (1999). DOI: 10.1890/0012-9658(1999)080[0686:ecmoca]2.0.co;2 Sites: US-HVa

A Model For Soil CO2 Production And Transport 2: Application To A Florida Pinus Elliotte Plantation
Moncrieff, J. B., Fang, C.

In this paper, the one-dimensional, process-based soil CO2 model (PATCIS) described in Part 1 is parameterized and validated with field data collected in a mature slash pine plantation in Florida. The results of a model sensitivity analysis show that CO2


Journal: Agricultural And Forest Meteorology, Volume 95 (4): 237-256 (1999). DOI: 10.1016/s0168-1923(99)00035-0 Sites: US-SP1, US-SP2, US-SP3, US-SP4

Seasonal Gas Exchange Of Black Spruce Using An Automatic Branch Bag System
Rayment, M. B., Jarvis, P. G.

Four large cuvettes were used to measure whole-branch CO2 and H2O vapour exchange at the Boreal Ecosystem-Atmosphere Study, Southern Study Area, Old Black Spruce site. Measurements started before the spring thaw and continued until after the winter freeze-up. Daytime photosynthesis, nighttime respiration, transpiration …


Journal: Canadian Journal Of Forest Research, Volume 29 (10): 1528-1538 (1999). DOI: 10.1139/cjfr-29-10-1528 Sites: CA-Obs, CA-SF2, CA-SF3

On The Seasonality Of Isoprene Emissions From A Mixed Temperate Forest
Fuentes, J. D., Wang, D.

Measurements of isoprene concentration and flux were made at a mixed deciduous forest in southern Canada during 1995 to characterize diel and seasonal emissions and thus deduce annual inventories. Isoprene …


Journal: Ecological Applications, Volume 9 (4): 1118-1131 (1999). DOI: 10.1890/1051-0761(1999)009[1118:otsoie]2.0.co;2 Sites: CA-Cbo

Micrometeorology, Biophysical Exchanges And NEE Decomposition In A Two-Story Boreal Forest — Development And Test Of An Integrated Model
Gu, L., Shugart, H. H., Fuentes, J. D., Black, T., Shewchuk, S. R.

An integrated model of canopy micrometeorology and exchanges of mass and energy was developed and tested for a two-story boreal forest. Roles of different elements of this forest ecosystem in determining net ecosystem exchanges (NEEs) of sensible heat, water vapor and CO2 were analyzed by using the model. In this model, …


Journal: Agricultural And Forest Meteorology, Volume 94 (2): 123-148 (1999). DOI: 10.1016/s0168-1923(99)00006-4 Sites: CA-Oas

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). DOI: 10.1029/1999jd900289 Sites: US-Blo