Index Catalog // ScholarsArchive@OSU

Toward biologically meaningful net carbon exchange estimates for tall, dense canopies: Multi-level eddy covariance observations and canopy coupling regimes in a mature Douglas-fir forest in Oregon

Creator:: Thomas, Christoph K., Martin, Jonathan G., Law, Beverly E., and Davis, Kent
Abstract:: We sought to improve net ecosystem exchange (NEE) estimates for a tall, dense, mature Douglas-Fir forest in the Oregon Coast range characterized by weak flows, systematic wind directional shear, and limited turbulent mixing throughout the diurnal period. We used eddy covariance (EC) observations at two levels and concurrent biological measurements...
Resource Type:: Article
Full Text:: coupling regimes in a mature Douglas-fir forest in Oregon Christoph K. Thomasa,b,∗, Jonathan G. Martinb

Thinning effects on forest productivity: Consequences of preserving old forests and mitigating impacts of fire and drought

Creator:: Law, Beverly E., Hudiburg, Tara W., and Luyssaert, Sebastiaan
Abstract:: Background: Management strategies have been proposed to minimise the effects of climate change on forest resilience. Aims: We investigated the Pacific Northwest US region forest carbon balance under current practices, and changes that may result from management practices proposed for the region’s 34 million ha of forests to mitigate climate...
Resource Type:: Article
Full Text:: preserving old forests and mitigating 1 impacts of fire and drought 2 3 Beverly E. Law * 1 , Tara W

Empirical assessment of uncertainties of meteorological parameters and turbulent fluxes in the AmeriFlux network

Creator:: Schmidt, Andres, Hanson, Chad, Chan, W. Stephen, and Law, Beverly E.
Abstract:: Terrestrial ecosystem-atmosphere exchange of carbon, water vapor, and energy has been measured for over a decade at many sites globally. To minimize measurement and analysis errors, quality assurance data have been collected over short periods along-side tower instruments at AmeriFlux research sites. Theoretical and empirical error and uncertainty values have...
Resource Type:: Article
Full Text:: Hanson,1 W. Stephen Chan,1 and Beverly E. Law1 Received 11 June 2012; revised 13 October 2012; accepted

Nocturnal subcanopy flow regimes and missing carbon dioxide

Creator:: Vickers, Dean, Irvine, James, Martin, Jonathan G., and Law, Beverly E.
Abstract:: Two distinct nocturnal subcanopy flow regimes are observed beneath a tall (16 m) open pine forest canopy. The first is characterized by weaker mixing, stronger stability, westerly downslope flow decoupled from the flow above the canopy and much smaller than expected ecosystem respiration from the eddy flux plus storage measurements...
Resource Type:: Article
Full Text:: , OR,3 U.S.A.4 James Irvine, Jonathan G. Martin and Beverly E. Law5 College of Forestry, Oregon

Forest Fire Impacts on Carbon Uptake, Storage, and Emission: The Role of Burn Severity in the Eastern Cascades, Oregon

Creator:: Meigs, Garrett W., Donato, Daniel C., Campbell, John L., Martin, Jonathan G., and Law, Beverly E.
Abstract:: This study quantifies the short-term effects of low-, moderate-, and high-severity fire on carbon pools and fluxes in the Eastern Cascades of Oregon. We surveyed 64 forest stands across four fires that burned 41,000 ha (35%) of the Metolius Watershed in 2002 and 2003, stratifying the landscape by burn severity...
Resource Type:: Article
Full Text:: L. Campbell,1 Jonathan G. Martin,1 and Beverly E. Law1 1Department of Forest Ecosystems and Society

Five years of carbon fluxes and inherent water-use efficiency at two semi-arid pine forests with different disturbance histories

Creator:: Vickers, Dean, Thomas, Christoph K., Pettijohn, Cory, Martin, Jon G., and Law, Beverly E.
Abstract:: Five years of eddy-covariance and other measurements at a mature ponderosa pine forest and a nearby young plantation are used to contrast the carbon fluxes for long-term averages, seasonal patterns, diel patterns and interannual variability, and to examine the differing responses to water-stress. The mature forest with larger leaf area...
Resource Type:: Article
Full Text:: VICKERS1*, CHRISTOPH K. THOMAS1, CORY PETTIJOHN2, JON G. MARTIN2 and BEVERLY E. LAW2, 1College of Oceanic

Removing traffic emissions from CO₂ time series measured at a tall tower using mobile measurements and transport modeling

Creator:: Schmidt, Andres, Rella, Chris W., Göckede, Mathias, Hanson, Chad, Yang, Zhenlin, and Law, Beverly E.
Abstract:: In recent years, measurements of atmospheric carbon dioxide with high precision and accuracy have become increasingly important for climate change research, in particular to inform terrestrial biosphere models. Anthropogenic carbon dioxide emissions from fossil fuel burning have long been recognized to contribute a significant portion of the carbon dioxide in...
Resource Type:: Article
Full Text:: Schmidt, A., Rella, C. W., Göckede, M., Hanson, C., Yang, Z., & Law, B. E. (2014). Removing traffic

Atmospheric inverse modeling to constrain regional-scale CO₂ budgets at high spatial and temporal resolution

Creator:: Gockede, Mathias, Michalak, Anna M., Vickers, Dean, Turner, David P., and Law, Beverly E.
Abstract:: We present an inverse modeling framework designed to constrain CO2 budgets at regional scales. The approach captures atmospheric transport processes in high spatiotemporal resolution by coupling a mesoscale model with Lagrangian Stochastic backward trajectories. Terrestrial biosphere CO₂ emissions are generated through a simple diagnostic flux model that splits the net...
Resource Type:: Article
Full Text:: Anna M. Michalak,2,3 Dean Vickers,4 David P. Turner,1 and Beverly E. Law1 Received 16 April 2009

Sensitivity of a subregional scale atmospheric inverse CO₂ modeling framework to boundary conditions

Creator:: Göckede, Mathias, Turner, David P., Michalak, Anna M., Vickers, Dean, and Law, Beverly E.
Abstract:: We present an atmospheric inverse modeling framework to constrain terrestrial biosphere CO₂ exchange processes at subregional scales. The model is operated at very high spatial and temporal resolution, using the state of Oregon in the northwestern United States as the model domain. The modeling framework includes mesoscale atmospheric simulations coupled...
Resource Type:: Article
Full Text:: . Michalak,2,3 Dean Vickers,4 and Beverly E. Law1 Received 4 May 2010; revised 14 September 2010; accepted

Decadal Trends in Net Ecosystem Production and Net Ecosystem Carbon Balance for a Regional Socioecological System

Creator:: Turner, David P., Ritts, William D., Yang, Zhiqiang, Kennedy, Robert E., Cohen, Warren B., Duane, Maureen V., Thornton, Peter E., and Law, Beverly E.
Abstract:: Carbon sequestration is increasingly recognized as an ecosystem service, and forest management has a large potential to alter regional carbon fluxes − notably by way of harvest removals and related impacts on net ecosystem production (NEP). In the Pacific Northwest region of the U.S., the implementation of the Northwest Forest...
Resource Type:: Article
Full Text:: Society, Oregon State University Cohen, Warren B. U.S.D.A. Forest Service, Pacific Northwest Station

ScholarsArchive@OSU

Toward biologically meaningful net carbon exchange estimates for tall, dense canopies: Multi-level eddy covariance observations and canopy coupling regimes in a mature Douglas-fir forest in Oregon

Thinning effects on forest productivity: Consequences of preserving old forests and mitigating impacts of fire and drought

Empirical assessment of uncertainties of meteorological parameters and turbulent fluxes in the AmeriFlux network

Nocturnal subcanopy flow regimes and missing carbon dioxide

Forest Fire Impacts on Carbon Uptake, Storage, and Emission: The Role of Burn Severity in the Eastern Cascades, Oregon

Five years of carbon fluxes and inherent water-use efficiency at two semi-arid pine forests with different disturbance histories

Removing traffic emissions from CO₂ time series measured at a tall tower using mobile measurements and transport modeling

Atmospheric inverse modeling to constrain regional-scale CO₂ budgets at high spatial and temporal resolution

Sensitivity of a subregional scale atmospheric inverse CO₂ modeling framework to boundary conditions

Decadal Trends in Net Ecosystem Production and Net Ecosystem Carbon Balance for a Regional Socioecological System

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