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A Comparison Of Methods For Determining Forest Evapotranspiration And Its Components: Sap-Flow, Soil Water Budget, Eddy Covariance And Catchment Water Balance

by Fianna O'Brien - January 31, 2017

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… More

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Atmospheric Input And Origin Of Selected Elements In Walker Branch Watershed, Oak Ridge, Tennessee

by Fianna O'Brien - January 31, 2017

The elemental composition and relative contribution to input of precipitation and aerosols have been determined for the Walker Branch Watershed in Oak Ridge, Tennessee, U.S.A. Comparison of elemental ratios in… More

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Dynamics Of Isotopic Exchange Of Carbon Dioxide In A Tennessee Deciduous Forest

by Fianna O'Brien - January 31, 2017

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 ecosystems… More

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On Estimating Canopy Photosynthesis And Stomatal Conductance In A Deciduous Forest With Clumped Foliage

by Fianna O'Brien - January 31, 2017

The foliage in a fully-leafed deciduous forest canopy is clumped. Consequently, theory indicates that the probability of beam penetration will be estimated more accurately with a model based on the… More

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Importance Of Changing CO2, Temperature, Precipitation, And Ozone On Carbon And Water Cycles Of An Upland-Oak Forest: Incorporating Experimental Results Into Model Simulations

by Fianna O'Brien - January 31, 2017

Observed responses of upland-oak vegetation of the eastern deciduous hardwood forest to changing CO2, temperature, precipitation and tropospheric ozone (O3) were derived from field studies and interpreted with a stand-level… More

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The Carbon Balance Of Tropical, Temperate And Boreal Forests

by Fianna O'Brien - January 31, 2017

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 processes of carbon… More

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Scaling Carbon Dioxide And Water Vapour Exchange From Leaf To Canopy In A Deciduous Forest. II. Model Testing And Application

by Fianna O'Brien - January 31, 2017

The scaling of CO2 and water vapour transfer from leaf to canopy dimensions was achieved by integrating mechanistic models for physiological (photosynthesis, stomatal conductance and soil/root and bole respiration) and… More

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The Role Of Atmospheric Deposition In An Eastern U.S. Deciduous Forest

by Fianna O'Brien - January 31, 2017

Atmospheric sources contributed significantly to the annual flux of trace metals and sulfate to the forest floor of Walker Branch Watershed, a forested catchment in the southeastern United States. Atmospheric… More

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Leaf Age Affects The Seasonal Pattern Of Photosynthetic Capacityand Net Ecosystem Exchange Of Carbon In A Deciduous Forest

by Fianna O'Brien - January 30, 2017

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,… More

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A Field Investigation Of Sulfate Fluxes To A Deciduous Forest

by Fianna O'Brien - January 30, 2017

An intensive investigation of particulate sulfur fluxes to a deciduous forest was conducted at Oak Ridge, Tennessee, during May 1983, as part of a multilaboratory program to study the dry… More

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