Publications

Publications Found: 1378

Anthropogenic Emission Of Mercury To The Atmosphere In The Northeast United States
Lee, X., Bullock, O. R., Andres, R. J.

The severity and spatial extent of the health impact of anthropogenic mercury (Hg) emission to the atmosphere depend on the emission rate and chemical form of the emitted species. The few measurements of combustion flue gas give highly variable results about how the emission is divided between the elemental (Hg°) and reactive forms …


Journal: Geophysical Research Letters, Volume 28 (7): 1231-1234 (2001), ISBN . DOI: 10.1029/2000gl012274 Sites: US-GMF

Leaf Age Affects The Seasonal Pattern Of Photosynthetic Capacityand Net Ecosystem Exchange Of Carbon In A Deciduous Forest
Wilson, K. B., Baldocchi, D. D., Hanson, P. J.

Temporal trends in photosynthetic capacity are a critical factorin determining the seasonality and magnitude of ecosystem carbonfluxes. At a mixed deciduous forest in the south-eastern United States (Walker Branch Watershed, Oak Ridge, TN, USA), we independently measured seasonal trends in photosynthetic capacity (using single-leaf …


Journal: Plant, Cell And Environment, Volume 24 (6): 571-583 (2001), ISBN . DOI: 10.1046/j.0016-8025.2001.00706.x Sites: US-WBW

Quantifying The Complexity In Mapping Energy Inputs And Hydrologic State Variables Into Land-Surface Fluxes
Katul, G. G., Lai, C., Albertson, J. D., Vidakovic, B., Schäfer, K. V., Hsieh, C., Oren, R.

This study explores the complexity (or disorder) in mapping energy (Rn) forcing to land surface fluxes of sensible heat (Hs), water vapor (LE), and carbon dioxide (or net ecosystem exchange, NEE) for different soil water states (θ). Specifically, we ask, does the vegetation …


Journal: Geophysical Research Letters, Volume 28 (17): 3305-3307 (2001), ISBN . DOI: 10.1029/2000gl012154 Sites: US-Dk3

Prairie Growth, PAR Albedo And Seasonal Distribution Of Energy Fluxes
Burba, G. G., Verma, S. B.

Year-round measurements of surface energy fluxes, supporting meteorological parameters, soil moisture, and leaf foliage area were made at a tallgrass prairie site in north-central Oklahoma. Here we present the results of the first year (August 1996 to early September 1997) …


Journal: Agricultural And Forest Meteorology, Volume 107 (3): 227-240 (2001), ISBN . DOI: 10.1016/s0168-1923(00)00233-1 Sites: US-Shd

Ecosystem Respiration In A Young Ponderosa Pine Plantation In The Sierra Nevada Mountains, California
Xu, M., DeBiase, T. A., Qi, Y., Goldstein, A., Liu, Z.
We estimated total ecosystem respiration from a ponderosa pine (Pinus ponderosa Dougl. ex Laws.) plantation in the Sierra Nevada Mountains near Georgetown, California, from June to October, 1998. We apportioned ecosystem respiration among heterotrophic, root, stem and foliage based on relationships …


Journal: Tree Physiology, Volume 21 (5): 309-318 (2001), ISBN . DOI: 10.1093/treephys/21.5.309 Sites: US-Blo

Multiscale Analysis Of Vegetation Surface Fluxes: From Seconds To Years
Katul, G., Lai, C., Schäfer, K., Vidakovic, B., Albertson, J., Ellsworth, D., Oren, R.

The variability in land surface heat (H), water vapor (LE), and CO2 (or net ecosystem exchange, NEE) fluxes was investigated at scales ranging from fractions of seconds to years using eddy-covariance flux measurements above a pine forest. Because these fluxes …


Journal: Advances In Water Resources, Volume 24 (9-10): 1119-1132 (2001), ISBN . DOI: 10.1016/s0309-1708(01)00029-x Sites: US-Dk3

FLUXNET: A New Tool To Study The Temporal And Spatial Variability Of Ecosystem–Scale Carbon Dioxide, Water Vapor, And Energy Flux Densities
Baldocchi, D., Falge, E., Gu, L., Olson, R., Hollinger, D., Running, S., Anthoni, P., Bernhofer, C., Davis, K., Evans, R., Fuentes, J., Goldstein, A., Katul, G., Law, B., Lee, X., Malhi, Y., Meyers, T., Munger, W., Oechel, W., Paw, K. T., Pilegaard, K., Schmid, H. P., Valentini, R., Verma, S., Vesala, T., Wilson, K., Wofsy, S.

FLUXNET is a global network of micrometeorological flux measurement sites that measure the exchanges of carbon dioxide, water vapor, and energy between the biosphere and atmosphere. At present over 140 sites are operating on a long–term and continuous basis. Vegetation under study includes temperate conifer and broadleaved (deciduous …


Journal: Bulletin Of The American Meteorological Society, Volume 82 (11): 2415-2434 (2001), ISBN . DOI: 10.1175/1520-0477(2001)082<2415:FANTTS>2.3.CO;2 Sites: US-MMS

A Comparison Of Methods For Determining Forest Evapotranspiration And Its Components: Sap-Flow, Soil Water Budget, Eddy Covariance And Catchment Water Balance
Wilson, K. B., Hanson, P. J., Mulholland, P. J., Baldocchi, D. D., Wullschleger, S. D.

A multi-year, multi-technique study was conducted to measure evapotranspiration and its components within an uneven-aged mixed deciduous forest in the Southeastern United States. Four different measurement techniques were used, including soil water budget (1 year), sap flow …


Journal: Agricultural And Forest Meteorology, Volume 106 (2): 153-168 (2001), ISBN . DOI: 10.1016/s0168-1923(00)00199-4 Sites: US-WBW

Relative Importance Of Local And Regional Controls On Coupled Water, Carbon, And Energy Fluxes
Albertson, J. D., Katul, G. G., Wiberg, P.

This paper reports the first effort to include carbon, water, and heat exchange in a Large Eddy Simulation (LES) model for 3D canopy flows with dynamic response of leaf temperature and stomatal aperture. The LES model simulates eddy motion from 3D, transient integration …


Journal: Advances In Water Resources, Volume 24 (9-10): 1103-1118 (2001), ISBN . DOI: 10.1016/s0309-1708(01)00042-2 Sites: US-Dk3

Large Carbon Isotope Fractionation Associated With Oxidation Of Methyl Halides By Methylotrophic Bacteria
Miller, L. G., Kalin, R. M., McCauley, S. E., Hamilton, J. T., Harper, D. B., Millet, D. B., Oremland, R. S., Goldstein, A. H.

The largest biological fractionations of stable carbon isotopes observed in nature occur during production of methane by methanogenic archaea. These fractionations result in substantial (as much as ≈70‰) shifts in δ13C relative to the initial substrate. We …


Journal: Proceedings Of The National Academy Of Sciences, Volume 98 (10): 5833-5837 (2001), ISBN . DOI: 10.1073/pnas.101129798 Sites: US-Blo