Publications

Publications Found: 1437

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). DOI: 10.1073/pnas.101129798 Sites: US-Blo

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). DOI: 10.1029/2000gl012274 Sites: US-GMF

A Spectral Analysis Of Biosphere–Atmosphere Trace Gas Flux Densities And Meteorological Variables Across Hour To Multi-Year Time Scales
Baldocchi, D., Falge, E., Wilson, K.

The advent of long-term studies on CO2 and water vapor exchange provides us with new information on how the atmosphere and biosphere interact. Conventional time series analysis suggests that temporal fluctuations of weather variables and mass and energy flux densities occur on numerous time scales. The time scales …


Journal: Agricultural And Forest Meteorology, Volume 107 (1): 1-27 (2001). DOI: 10.1016/s0168-1923(00)00228-8 Sites: US-WBW

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). DOI: 10.1016/s0168-1923(00)00199-4 Sites: US-WBW

A Six-Year Study Of Sapling And Large-Tree Growth And Mortality Responses To Natural And Induced Variability In Precipitation And Throughfall
Hanson, P. J., Todd, D. E., Amthor, J. S.
Global climatic change may cause changes in regional precipitation that have important implications for forest growth in the southern United States. In 1993, a stand-level experiment was initiated on Walker Branch Watershed, Tennessee, to study the sensitivity of forest saplings and large trees to changes …


Journal: Tree Physiology, Volume 21 (6): 345-358 (2001). DOI: 10.1093/treephys/21.6.345 Sites: US-WBW

Fluxes Of Oxygenated Volatile Organic Compounds From A Ponderosa Pine Plantation
Schade, G. W., Goldstein, A. H.

We present the first canopy-scale, continuous, long-term flux measurements of a suite of oxygenated volatile organic compounds (OVOCs). Fluxes were measured above a ponderosa pine plantation, adjacent to …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 106 (D3): 3111-3123 (2001). DOI: 10.1029/2000jd900592 Sites: US-Blo

Test Of An Extended Mathematical Approach To Calculate Maize Leaf Area Index And Leaf Angle Distribution
Antunes, M. A. H., Walter-Shea, E. A., Mesarch, M. A.

Accurate estimates of leaf area index (LAI) and leaf angle distribution (LAD) are important for estimating the exchange of energy and gases in vegetative canopies. Direct estimates of LAI and LAD are laborious, time consuming and often times destructive. Stewart and Dwyer [Agric. For. Meteorol. 66 (1993) 247] introduced a mathematical …


Journal: Agricultural And Forest Meteorology, Volume 108 (1): 45-53 (2001). DOI: 10.1016/s0168-1923(01)00219-2 Sites: US-KFB, US-Kon

Modeling CO2 And Water Vapor Exchange Of A Temperate Broadleaved Forest Across Hourly To Decadal Time Scales
Baldocchi, D. D., Wilson, K. B.

Fluxes of carbon dioxide, water and energy between a temperate deciduous forest and the atmosphere were quantified across time scales of hours, days, seasons, years and decades. This exercise was performed using stand-level eddy covariance flux measurements and a biophysical model, CANOAK. The CANOAK model was tested with measurements …


Journal: Ecological Modelling, Volume 142 (1-2): 155-184 (2001). DOI: 10.1016/s0304-3800(01)00287-3 Sites: US-WBW

Boundary Layer Clouds And Vegetation–Atmosphere Feedbacks
Freedman, J. M., Fitzjarrald, D. R., Moore, K. E., Sakai, R. K.

An analysis of boundary layer cumulus clouds and their impact on land surface–atmosphere exchange is presented. Seasonal trends indicate that in response to increasing insolation and sensible heat flux, both the mixed-layer height (zi) …


Journal: Journal Of Climate, Volume 14 (2): 180-197 (2001). DOI: 10.1175/1520-0442(2001)013<0180:BLCAVA>2.0.CO;2 Sites: US-Ha1

Similarity Theory For Local And Spatially Averaged Momentum Fluxes
Nakamura, R., Mahrt, L.

Tower and aircraft data from a number of field studies are analyzed to: (1) estimate the roughness lengths for local and area-averaged momentum fluxes over various surface types; (2) examine the applicability of the ψ-stability formulations of Paulson and Dyer for momentum fluxes; (3) investigate the possibility …


Journal: Agricultural And Forest Meteorology, Volume 108 (4): 265-279 (2001). DOI: 10.1016/s0168-1923(01)00250-7 Sites: CA-Man, CA-Oas, CA-Obs, CA-Ojp, CA-SJ3