The global terrestrial carbon sink offsets one-third of the world’s fossil fuel emissions, but the strength of this sink is highly sensitive to large-scale extreme events. In 2012, the contiguous United States experienced exceptionally warm temperatures and the most severe drought since the Dust Bowl era of the 1930s, resulting …
Journal: Proceedings of the National Academy of Sciences, Volume 113 (21): 5880-5885 (2016). DOI: 10.1073/pnas.1519620113 Sites: US-Bar, US-Ced, US-Ho1, US-KFS, US-Kon, US-Me2, US-Me6, US-MMS, US-Mpj, US-NR1, US-PFa, US-Slt, US-SRC, US-SRM, US-Ton, US-UMB, US-Var, US-Vcm, US-Vcp, US-Whs, US-Wjs, US-Wkg
The vast forests and natural areas of the Pacific Northwest compose one of the most productive ecosystems in the Northern Hemisphere. The heterogeneous landscape of Oregon poses a particular challenge to ecosystem models. This study presents a framework using a scaling factor Bayesian inversion to improve the modeled atmosphere–biosphere …
Journal: Earth Interactions, Volume 20 (22): 1-35 (2016). DOI: 10.1175/EI-D-16-0011.1 Sites: US-Bsg, US-Me2
Journal: Journal Of Geophysical Research: Biogeosciences, Volume 119 (7): 1458-1473 (2014). DOI: 10.1002/2014JG002623 Sites: CA-Ca1, CA-Gro, CA-Let, CA-Oas, CA-Ojp, CA-Qfo, US-ARM, US-Dk3, US-Ha1, US-Ho1, US-IB2, US-Me2, US-MMS, US-MOz, US-Ne1, US-Ne2, US-Ne3, US-NR1, US-PFa, US-Syv, US-Ton, US-UMB, US-Var, US-WCr
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 …
Journal: Tellus Series B-Chemical and Physical Meteorology, Volume 64 (0): 17159-n/a (2012). DOI: 10.3402/tellusb.v64i0.17159 Sites: US-Me2
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 …
Journal: Agricultural And Forest Meteorology, Volume 152: 101-108 (2012). DOI: 10.1016/j.agrformet.2011.09.004 Sites: US-Me2
A new observational approach is presented to approximate the uncertainty (scatter or error variance) in 1-h averaged turbulence fluxes …
Journal: Tellus Series B-Chemical and Physical Meteorology, Volume 62 (2): 87-99 (2010). DOI: 10.1111/j.1600-0889.2009.00449.x Sites: US-Me2
We analyzed 7 years (2002–2008) of micrometeorological and concurrent biological observations of carbon and water fluxes at a mature ponderosa pine forest in central Oregon in a semiarid climate. We sought to evaluate the extent that gross primary productivity, net ecosystem exchange, ecosystem respiration, net primary productivity, …
Journal: Journal Of Geophysical Research: Biogeosciences, Volume 114 (G4): n/a-n/a (2009). DOI: 10.1029/2009jg001010 Sites: US-Me2
The perturbation timescale-dependences of the CO2 flux and the random flux sampling error are evaluated from eddy-covariance tower observations in the mid-day convective boundary layer over mid-latitude conifer forests. The perturbation timescale is the timescale used in the standard Reynolds decomposition to …
Journal: Agricultural And Forest Meteorology, Volume 149 (1): 73-83 (2009). DOI: 10.1016/j.agrformet.2008.07.005 Sites: US-Me2, US-Me3
Self-correlation between estimates of assimilation and respiration of carbon is a consequence of the flux partitioning of eddy-covariance measurements, where the assimilation is computed as the difference between the measured net carbon dioxide flux (NEE) and an …
Journal: Agricultural And Forest Meteorology, Volume 149 (9): 1552-1555 (2009). DOI: 10.1016/j.agrformet.2009.03.009 Sites: US-Me2
We examined a 6-year record of automated chamber-based soil CO2 efflux (Fs) and the underlying processes in relation to climate and canopy gas …
Journal: Global Change Biology, Volume 14 (12): 2848-2859 (2008). DOI: 10.1111/j.1365-2486.2008.01682.x Sites: US-Me2