Publications

Publications Found: 1373

Carbon Dioxide And Water Vapor Exchange By Young And Old Ponderosa Pine Ecosystems During A Dry Summer
Law, B. E., Goldstein, A. H., Anthoni, P. M., Unsworth, M. H., Panek, J. A., Bauer, M. R., Fracheboud, J. M., Hultman, N.

We investigated key factors controlling mass and energy exchange by a young (6-year-old) ponderosa pine (Pinus ponderosa Laws.) plantation on the west side of the Sierra Nevada Mountains and an old-growth ponderosa pine forest (mix of 45- and 250-year-old trees) on the east side of the Cascade Mountains, from June through …


Journal: Tree Physiology, Volume 21 (5): 299-308 (2001), ISBN . DOI: 10.1093/treephys/21.5.299 Sites: US-Me4, US-Me5

Long-Term Observations Of The Dynamics Of The Continental Planetary Boundary Layer
Yi, C., Davis, K. J., Berger, B. W., Bakwin, P. S.

Time series of mixed layer depth, zi, and stable boundary layer height from March through October of 1998 are derived from a 915-MHz boundary layer profiling radar and CO2 mixing ratio measured from a 447-m tower in northern Wisconsin. Mixed layer depths from the profiler are in good agreement with radiosonde …


Journal: Journal Of The Atmospheric Sciences, Volume 58 (10): 1288-1299 (2001), ISBN . DOI: 10.1175/1520-0469(2001)058<1288:LTOOTD>2.0.CO;2 Sites: US-PFa

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), ISBN . DOI: 10.1029/2000jd900592 Sites: US-Blo

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), ISBN . DOI: 10.1016/s0168-1923(00)00228-8 Sites: US-WBW

Sensible Heat Flux Estimation By Flux Variance And Half-Order Time Derivative Methods
Wesson, K. H., Katul, G., Lai, C.

This study is the first to contrast two similarity theory methods, the flux variance and the half-order time derivative, over a wide range of atmospheric stability and surface roughness conditions. These …


Journal: Water Resources Research, Volume 37 (9): 2333-2343 (2001), ISBN . DOI: 10.1029/2001wr900021 Sites: US-Dk3

The Impact Of Forest Structure On Near-Ground Temperatures During Two Years Of Contrasting Temperature Extremes
Potter, B. E., Teclaw, R. M., Zasada, J. C.

The thermal environment of clear-cut, partially cut, and uncut forest sites in northern Wisconsin are examined for a warm year and a cool year. Temperatures at 0.5 m above and 0.05 m below ground, as well as base 5°C heat sums are computed for each site between May and …


Journal: Agricultural And Forest Meteorology, Volume 106 (4): 331-336 (2001), ISBN . DOI: 10.1016/s0168-1923(00)00220-3 Sites: US-WCr

Long-Term Carbon Dioxide Fluxes From A Very Tall Tower In A Northern Forest: Flux Measurement Methodology
Berger, B. W., Davis, K. J., Yi, C., Bakwin, P. S., Zhao, C. L.

Methodology for determining fluxes of CO2 and H2O vapor with the eddy-covariance method using data from instruments on a 447-m tower in the forest of northern Wisconsin is addressed. The primary goal of this study is the validation of the methods used to determine the net ecosystem exchange of CO2. …


Journal: Journal Of Atmospheric And Oceanic Technology, Volume 18 (4): 529-542 (2001), ISBN . DOI: 10.1175/1520-0426(2001)018<0529:LTCDFF>2.0.CO;2 Sites: US-PFa

Carbon Storage And Fluxes In Ponderosa Pine Forests At Different Developmental Stages
Law, B., Thornton, P., Irvine, J., Anthoni, P., Van Tuyl, S.

We compared carbon storage and fluxes in young and old ponderosa pine stands in Oregon, including plant and soil storage, net primary productivity, respiration fluxes, eddy …


Journal: Global Change Biology, Volume 7 (7): 755-777 (2001), ISBN . DOI: 10.1046/j.1354-1013.2001.00439.x Sites: US-Me4, US-Me5

Environmental Regulation Of Carbon Dioxide Exchange At The Forest Floor In A Boreal Black Spruce Ecosystem
Swanson, R. V., Flanagan, L. B.

Measurements of CO2 exchange at the forest floor were made in shady dry areas dominated by feather mosses and open wet areas dominated by Sphagnum mosses within a 120-year-old black spruce forest in central Saskatchewan during 1996. Our objective was to study the environmental regulation of moss photosynthesis …


Journal: Agricultural And Forest Meteorology, Volume 108 (3): 165-181 (2001), ISBN . DOI: 10.1016/s0168-1923(01)00243-x Sites: CA-Obs

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), ISBN . DOI: 10.1093/treephys/21.6.345 Sites: US-WBW