Publications

Publications Found: 1378

Carbon Exchange And Venting Anomalies In An Upland Deciduous Forest In Northern Wisconsin, USA
Cook, B. D., Davis, K. J., Wang, W., Desai, A., Berger, B. W., Teclaw, R. M., Martin, J. G., Bolstad, P. V., Bakwin, P. S., Yi, C., Heilman, W.

Turbulent fluxes of carbon, water vapor, and temperature were continuously measured above an upland forest in north central Wisconsin during 1999 and 2000 using the eddy covariance method. Maple (Acer saccharum), basswood (Tilia americana), and green ash (Fraxinus pennsylvanica) species found in this forest …


Journal: Agricultural And Forest Meteorology, Volume 126 (3-4): 271-295 (2004), ISBN . DOI: 10.1016/j.agrformet.2004.06.008 Sites: US-Los, US-PFa, US-WCr

Climate Impact On Net Ecosystem Productivity Of A Semi-Arid Natural Grassland: Modeling And Measurement
Li, T., Grant, R. F., Flanagan, L. B.

Models used to estimate net ecosystem productivity (NEP) during climate change should first be shown to simulate the effects on NEP of interannual variability in current climates. Energy and CO2 fluxes simulated by the ecosystem model ecosys were compared …


Journal: Agricultural And Forest Meteorology, Volume 126 (1-2): 99-116 (2004), ISBN . DOI: 10.1016/j.agrformet.2004.06.005 Sites: CA-Let

Carbon Dynamics Along A Chronosequence Of Slash Pine Plantations In North Florida
Clark, K. L., Gholz, H. L., Castro, M. S.

To determine factors controlling the carbon dynamics of an intensively managed landscape, we measured net CO2 exchange with the atmosphere using eddy covariance and soil CO2 fluxes using static chambers along a chronosequence of slash pine (Pinus elliottii var.
Journal: Ecological Applications, Volume 14 (4): 1154-1171 (2004), ISBN . DOI: 10.1890/02-5391 Sites: US-SP1, US-SP2, US-SP3, US-SP4


Screening Yield Monitor Data Improves Grain Yield Maps
Simbahan, G. C., Dobermann, A., Ping, J. L.

Yield monitor data contain systematic and random errors, which must be removed for creating accurate yield maps. A general procedure for assessing yield data cleaning methods was applied to a new postprocessing algorithm in which six common types of erroneous yield monitor values were removed: (1) combine header status up; (2) start-/end-pass …


Journal: Agronomy Journal, Volume 96 (4): 1091-1102 (2004), ISBN . DOI: 10.2134/agronj2004.1091 Sites: US-Ne1, US-Ne2, US-Ne3

Airflows And Turbulent Flux Measurements In Mountainous Terrain: Part 2: Mesoscale effects
Turnipseed, A. A., Anderson, D. E., Burns, S., Blanken, P. D., Monson, R. K.

The location of the Niwot Ridge Ameriflux site within the rocky mountains subjects it to airflows which are common in mountainous terrain. In this study, we examine the effects of some of these mesoscale features on local turbulent flux measurements; most notably, the formation of valley/mountain flows and mountain lee-side …


Journal: Agricultural And Forest Meteorology, Volume 125 (3-4): 187-205 (2004), ISBN . DOI: 10.1016/j.agrformet.2004.04.007 Sites: US-NR1

On The Construction And Calibration Of Dual-Probe Heat Capacity Sensors
Ham, J. M., Benson, E. J.

Dual-probe heat-capacity (DPHC) sensors can be used to measure soil heat capacity (C), water content, and temperature. Research was conducted to test design factors that affect sensor calibration, including: (i) calibration media, (ii) diameter and length of the needle probes, (iii) sensor body material, and (vi) duration …


Journal: Soil Science Society Of America Journal, Volume 68 (4): 1185-1190 (2004), ISBN . DOI: 10.2136/sssaj2004.1185 Sites: CA-Mer

Monitoring Forest Carbon Sequestration With Remote Sensing And Carbon Cycle Modeling
Turner, D. P., Guzy, M., Lefsky, M. A., Ritts, W. D., Van Tuyl, S., Law, B. E.

Sources and sinks of carbon associated with forests depend strongly on the management regime and spatial patterns in potential productivity. Satellite remote sensing can provide spatially explicit information on land cover, stand-age class, and harvesting. Carbon-cycle process models coupled to regional climate databases can provide …


Journal: Environmental Management, Volume 33 (4): 457-466 (2004), ISBN . DOI: 10.1007/s00267-003-9103-8 Sites: US-Me2

Forest Attributes From Radar Interferometric Structure And Its Fusion With Optical Remote Sensing
Treuhaft, R. N., Law, B. E., Asner, G. P.

The possibility of global, three-dimensional remote sensing of forest structure with interferometric synthetic aperture radar (InSAR) bears on important forest ecological processes, particularly the carbon cycle. InSAR supplements two-dimensional remote sensing with information in the vertical dimension. Its strengths in potential …


Journal: Bioscience, Volume 54 (6): 561-571 (2004), ISBN . DOI: 10.1641/0006-3568(2004)054[0561:fafris]2.0.co;2 Sites: US-Me2, US-Me4, US-Me5

Interannual And Seasonal Variation In Fluxes Of Water And Carbon Dioxide From A Riparian Woodland Ecosystem
Scott, R. L., Edwards, E. A., Shuttleworth, W., Huxman, T. E., Watts, C., Goodrich, D. C.

Fluxes of water, energy and carbon dioxide (CO2) were measured using the eddy covariance technique over a mesquite (Prosopis velutina) woodland along the San Pedro River in southeastern Arizona for the entire growing seasons of 2001 and 2002, between the last freeze event of spring and the first of fall. Although the general pattern …


Journal: Agricultural And Forest Meteorology, Volume 122 (1-2): 65-84 (2004), ISBN . DOI: 10.1016/j.agrformet.2003.09.001 Sites: US-CMW

Simulated And Observed Fluxes Of Sensible And Latent Heat And CO2 At The WLEF-TV Tower Using SiB2.5
Baker, I., Denning, A. S., Hanan, N., Prihodko, L., Uliasz, M., Vidale, P., Davis, K., Bakwin, P.

Three years of meteorological data collected at the WLEF-TV tower were used to drive a revised version of the Simple Biosphere (SiB 2.5) Model. Physiological properties and vegetation phenology were specified from satellite imagery. Simulated fluxes of heat, moisture, and carbon were compared to eddy covariance measurements taken …


Journal: Global Change Biology, Volume 9 (9): 1262-1277 (2003), ISBN . DOI: 10.1046/j.1365-2486.2003.00671.x Sites: US-Los, US-PFa, US-WCr