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Moisture Sensitivity Of Ecosystem Respiration: Comparison Of 14 Forest Ecosystems In The Upper Great Lakes Region, USA

by Fianna O'Brien - January 27, 2017

Ecosystem respiration (ER) was measured with the eddy covariance technique in 14 forest ecosystems in the Upper Great Lakes Region during the growing seasons of 2002 and 2003. The response… More

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Ecosystem And Understory Water And Energy Exchange For A Mature, Naturally Regenerated Pine Flatwoods Forest In North Florida

by Fianna O'Brien - January 27, 2017

Eddy covariance was used to measure energy fluxes from July 2000 – June 2002 above the tree canopy and above the understory in a mature, naturally regenerated slash pine (Pinus… More

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Influence Of Vegetation And Seasonal Forcing On Carbon Dioxide Fluxes Across The Upper Midwest, Usa: Implications For Regional Scaling

by Fianna O'Brien - January 27, 2017

Carbon dioxide fluxes were examined over the growing seasons of 2002 and 2003 from 14 different sites in Upper Midwest (USA) to assess spatial variability of ecosystem–atmosphere CO2 exchange. These… More

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Canopy Leaf Area Constrains [Co2]-Induced Enhancement Of Productivity And Partitioning Among Aboveground Carbon Pools

by Fianna O'Brien - January 27, 2017

Net primary productivity (NPP) is enhanced under future atmospheric [CO2] in temperate forests representing a broad range of productivity. Yet questions remain in regard to how elevated [CO2]-induced NPP enhancement… More

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Species Differences In Stomatal Control Of Water Loss At The Canopy Scale In A Mature Bottomland Deciduous Forest

by Fianna O'Brien - January 27, 2017

In order to evaluate factors controlling transpiration of six common eastern deciduous species in North America, a model describing responses of canopy stomatal conductance (GS) to net radiation (RN), vapor… More

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Influences Of Biomass Heat And Biochemical Energy Storages On The Land Surface Fluxes And Radiative Temperature

by Fianna O'Brien - January 27, 2017

The interest of this study was to develop an initial assessment on the potential importance of biomass heat and biochemical energy storages for land-atmosphere interactions, an issue that has been… More

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Ecosystem Respiration And Its Components In An Old-Growth Forest In The Great Lakes Region Of The United States

by Fianna O'Brien - January 27, 2017

Ecosystem respiration and its components are sensitive to age, species, stand structure, and environmental conditions, and substantially influence net ecosystem productivity. We measured ecosystem respiration and component respiration including soil,… More

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Long-Term Impacts Of Agriculture On Soil Carbon And Nitrogen In New England Forests

by Fianna O'Brien - January 27, 2017

Abandonment and reforestation of agricultural lands has been a major influence on the landscape of eastern North America. Cultivation and soil amendments can dramatically alter soil nutrient pools and cycling,… More

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Long-Term Carbon Dioxide Fluxes From A Very Tall Tower In A Northern Forest: Flux Measurement Methodology

by Fianna O'Brien - January 27, 2017

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… More

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Seasonal Variations In The Radiation Regime Within An Oak-Hickory Forest

by Fianna O'Brien - January 27, 2017

Seasonal variations in solar elevation, canopy phenology and leaf pigmentation result in a dynamic variation in the radiation regime within a deciduous forest. Measurements of several insolation components taken within… More

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