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Increase Of Monoterpene Emissions From A Pine Plantation As A Result Of Mechanical Disturbances

by Fianna O'Brien - January 31, 2017

Mixing ratios and emission rates of monoterpenes were measured above a ponderosa pine plantation in the Sierra Nevada mountains before, during and after a pre-commercial thinning in spring 2000. The… More

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Carbon Dioxide Exchange Over Multiple Temporal Scales In An Arid Shrub Ecosystem Near La Paz, Baja California Sur, Mexico

by Fianna O'Brien - January 31, 2017

Arid environments represent 30% of the global terrestrial surface, but are largely under-represented in studies of ecosystem carbon flux. Less than 2% of all FLUXNET eddy covariance sites exist in… More

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Relative Contributions Of Soil, Foliar, And Woody Tissue Respiration To Total Ecosystem Respiration In Four Pine Forests Of Different Ages

by Fianna O'Brien - January 31, 2017

Carbon dioxide (CO2) emissions from soil, foliage, and live woody tissue were measured throughout the year in afforested, white pine (Pinus strobus L.) stands (67, 32, 17, and 4 years… More

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Use Of Digital Webcam Images To Track Spring Green-Up In A Deciduous Broadleaf Forest

by Fianna O'Brien - January 31, 2017

Understanding relationships between canopy structure and the seasonal dynamics of photosynthetic uptake of CO2 by forest canopies requires improved knowledge of canopy phenology at eddy covariance flux tower sites. We… More

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Spatial Variation In Regional CO2 Exchange For The Kuparuk River Basin, Alaska Over The Summer Growing Season

by Fianna O'Brien - January 31, 2017

The spatial and temporal patterns in CO2 flux for the Kuparuk River Basin, a 9200-km2 watershed located in NE Alaska were estimated using the Regional Arctic CO2 Exchange Simulator (RACES)… More

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Climatology Of The Low-Level Jet At The Southern Great Plains Atmospheric Boundary Layer Experiments Site

by Fianna O'Brien - January 31, 2017

A unique dataset obtained with combinations of minisodars and 915-MHz wind profilers at the Atmospheric Boundary Layer Experiments (ABLE) facility in Kansas was used to examine the detailed characteristics of… More

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FLUXNET: A New Tool To Study The Temporal And Spatial Variability Of Ecosystem–Scale Carbon Dioxide, Water Vapor, And Energy Flux Densities

by Fianna O'Brien - January 31, 2017

FLUXNET is a global network of micrometeorological flux measurement sites that measure the exchanges of carbon dioxide, water vapor, and energy between the biosphere and atmosphere. At present over 140… More

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Growing Season Carbon Dioxide Exchange In Irrigated And Rainfed Maize

by Fianna O'Brien - January 31, 2017

Net ecosystem CO2 exchange (NEE) was measured in maize-based agroecosystems in eastern Nebraska, USA, during the growing season in 2001. The objective of this study was to quantify and contrast… More

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Surface Energy And Carbon Dioxide Fluxes Above Different Vegetation Types Within ABLE

by Fianna O'Brien - January 31, 2017

Nineteen months of continuous data from two sites within the atmospheric boundary layer experiments (ABLE) facility are used to compare surface energy fluxes, carbon dioxide fluxes and controlling parameters. One… More

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Direct And Indirect Effects Of Elevated CO2 On Transpiration From Quercus Myrtifolia In A Scrub-Oak Ecosystem

by Fianna O'Brien - January 31, 2017

Elevated atmospheric carbon dioxide (Ca) usually reduces stomatal conductance, but the effects on plant transpiration in the field are not well understood. Using constant-power sap flow gauges, we measured transpiration… More

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