Publications

Publications Found: 1437

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

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

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

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

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). DOI: 10.1016/s0034-4257(99)00058-9 Sites: CA-Man, US-KFB, US-Kon

Boreas Flight Measurements Of Forest-Fire Effects On Carbon Dioxide And Energy Fluxes
Amiro, B., MacPherson, J. I., Desjardins, R. L.

Fire is the dominant stand-replacing agent in the Canadian boreal forest, but few quantitative measurements are available on the micrometeorological effects of fire. Airborne flux measurements during the BOREAS experiment were referenced to age of burn along a 500-km transect …


Journal: Agricultural And Forest Meteorology, Volume 96 (4): 199-208 (1999). DOI: 10.1016/s0168-1923(99)00050-7 Sites: CA-Man

Responses Of Net Ecosystem Exchanges Of Carbon Dioxide To Changes In Cloudiness: Results From Two North American Deciduous Forests
Gu, L., Fuentes, J. D., Shugart, H. H., Staebler, R. M., Black, T. A.

We analyzed half-hourly tower-based flux measurements of carbon dioxide (CO2) from a boreal aspen forest and a temperate mixed deciduous forest in Canada to examine the influences of clouds on forest carbon uptake. We showed that the presence of clouds consistently and significantly increased the net ecosystem exchanges …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 104 (D24): 31421-31434 (1999). DOI: 10.1029/1999jd901068 Sites: CA-Cbo