Publications

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Publications Found: 70

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

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). DOI: 10.1046/j.0016-8025.2001.00706.x Sites: US-WBW

Comparing Independent Estimates Of Carbon Dioxide Exchange Over 5 Years At A Deciduous Forest In The Southeastern United States
Wilson, K. B., Baldocchi, D. D.

At a deciduous forest in the southeast United States (Walker Branch Watershed, Oak Ridge, Tennessee), as at other sites with tall vegetation and/or complex terrain, it is difficult to temporally integrate …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 106 (D24): 34167-34178 (2001). DOI: 10.1029/2001jd000624 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

Seasonal And Interannual Variability Of Energy Fluxes Over A Broadleaved Temperate Deciduous Forest In North America
Wilson, K. B., Baldocchi, D. D.

The components of the surface energy balance were measured for 3 years over a broadleaved deciduous forest using the eddy covariance technique. Within years, the magnitude and distribution of fluxes was controlled by seasonal changes in solar radiation, drought, as well as leaf emergence and senescence. Evapotranspiration increased …


Journal: Agricultural And Forest Meteorology, Volume 100 (1): 1-18 (2000). DOI: 10.1016/s0168-1923(99)00088-x Sites: US-WBW

Spatial And Seasonal Variability Of Photosynthetic Parameters And Their Relationship To Leaf Nitrogen In A Deciduous Forest
Wilson, K. B., Baldocchi, D. D., Hanson, P. J.

We used gas exchange techniques to estimate maximum rate of carboxylation (Vcmax), a measure of photosynthetic capacity, in the understory and upper crown of a closed deciduous forest over two seasons. There was extensive variability in photosynthetic capacity as a result of vertical canopy position, species type, …


Journal: Tree Physiology, Volume 20 (9): 565-578 (2000). DOI: 10.1093/treephys/20.9.565 Sites: US-WBW

Factors Controlling Evaporation And Energy Partitioning Beneath A Deciduous Forest Over An Annual Cycle
Wilson, K. B., Hanson, P. J., Baldocchi, D. D.

The energy balance components were measured above the ground surface of a temperate deciduous forest over an annual cycle using the eddy covariance technique. Over a year, the net radiation at the forest floor was 21.5% of that above the canopy, but this proportion was not constant, primarily because of the distinct phenological …


Journal: Agricultural And Forest Meteorology, Volume 102 (2-3): 83-103 (2000). DOI: 10.1016/s0168-1923(00)00124-6 Sites: US-WBW

Dynamics Of Isotopic Exchange Of Carbon Dioxide In A Tennessee Deciduous Forest
Bowling, D. R., Baldocchi, D. D., Monson, R. K.

The combination of isotopic measurements and micrometeorological flux measurements is a powerful new approach that will likely lead to new insight into the dynamics of CO2 exchange between terrestrial …


Journal: Global Biogeochemical Cycles, Volume 13 (4): 903-922 (1999). DOI: 10.1029/1999gb900072 Sites: US-WBW

The Carbon Balance Of Tropical, Temperate And Boreal Forests
Malhi, Y., Baldocchi, D. D., Jarvis, P. G.

Forest biomes are major reserves for terrestrial carbon, and major components of global primary productivity. The carbon balance of forests is determined by a number of component …


Journal: Plant, Cell And Environment, Volume 22 (6): 715-740 (1999). DOI: 10.1046/j.1365-3040.1999.00453.x Sites: CA-Obs, US-WBW

The Use Of Relaxed Eddy Accumulation To Measure Biosphere-Atmosphere Exchange Of Isoprene And Other Biological Trace Gases
Bowling, D. R., Turnipseed, A. A., Delany, A. C., Baldocchi, D. D., Greenberg, J. P., Monson, R. K.

The micrometeorological flux measurement technique known as relaxed eddy accumulation (REA) holds promise as a powerful new tool for ecologists. The more popular eddy covariance (eddy correlation) technique requires the use of sensors that can respond at fast rates (10 Hz), and these are unavailable for many ecologically relevant …


Journal: Oecologia, Volume 116 (3): 306-315 (1998). DOI: 10.1007/s004420050592 Sites: US-WBW