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Measuring And Modelling Carbon Dioxide And Water Vapour Exchange Over A Temperate Broad-Leaved Forest During The 1995 Summer Drought

by Fianna O'Brien - January 30, 2017

Forests in the south-eastern United States experienced a prolonged dry spell and above-normal temperatures during the 1995 growing season. During this episode, nearly continuous, eddy covariance measurements of carbon dioxide… More

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Effects Of Logging On Carbon Dynamics Of A Jack Pine Forest In Saskatchewan, Canada

by Fianna O'Brien - January 30, 2017

We calculated carbon budgets for a chronosequence of harvested jack pine (Pinus banksiana Lamb.) stands (0-, 5-, 10-, and∼29-year-old) and a∼79-year-old stand that originated after wildfire. We measured total ecosystem… More

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Below-Canopy And Soil CO2 Fluxes In A Ponderosa Pine Forest

by Fianna O'Brien - January 30, 2017

Below-canopy eddy covariance measurements of CO2 flux (Fcb) and soil surface CO2flux measurements (Fs) were made seasonally in a ponderosa pine forest in central Oregon in 1996 and 1997. The… More

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Estimation Of Leaf Area Index And Light Intercepted By Shrubs From Digital Videography

by Fianna O'Brien - January 30, 2017

The development of digital videography has generated interest in the use of these instruments to estimate vegetation variables such as leaf area index (LAI) and light intercepted (fIPAR) by shrubs… More

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Exposure To An Enriched CO2 Atmosphere Alters Carbon Assimilation And Allocation In A Pine Forest Ecosystem

by Fianna O'Brien - January 30, 2017

We linked a leaf-level CO2 assimilation model with a model that accounts for light attenuation in the canopy and measurements of sap-flux-based canopy conductance into a new canopy conductance-constrained carbon… More

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Ecosystem-Atmosphere Exchange Of Carbon Dioxide Over A Mixed Hardwood Forest In Northern Lower Michigan

by Fianna O'Brien - January 30, 2017

We report results from the first 3 years (1999–2001) of long-term measurements of net ecosystem exchange (NEE) at an AmeriFlux site over a mixed hardwood forest in northern lower Michigan…. More

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Comparing The Carbon Budgets Of Boreal And Temperate Deciduous Forest Stands

by Fianna O'Brien - January 30, 2017

Boreal and temperate deciduous forests at northern mid-latitudes play an important role in the global carbon cycle. We analyze 3 years (1996-1998) of eddy-covariance carbon dioxide flux measurements from two… More

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Comparison Of Net Ecosystem CO2 Exchange In Two Peatlands In Western Canada With Contrasting Dominant Vegetation, Sphagnum And Carex

by Fianna O'Brien - January 30, 2017

Net ecosystem carbon dioxide exchange was measured in two contrasting peatlands in northern Alberta, Canada using the eddy covariance technique during the growing season (May–October). Sphagnum spp. made up approximately… More

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Canopy Fluxes Of 2-Methyl-3-Buten-2-Ol Over A Ponderosa Pine Forest By Relaxed Eddy Accumulation: Field Data And Model Comparison

by Fianna O'Brien - January 30, 2017

Canopy level flux measurements of 2-methyl-3-buten-2-ol (MBO) were made over a 7 year old ponderosa pine plantation in the Sierra Nevada range of California using the relaxed eddy accumulation method…. More

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Estimating Components Of Forest Evapotranspiration: A Footprint Approach For Scaling Sap Flux Measurements

by Fianna O'Brien - January 30, 2017

Forest evapotranspiration (ET) estimates that include scaled sap flux measurements often underestimate eddy covariance (EC)-measured latent heat flux (LE). We investigated potential causes for this bias using 4 years of… More

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