Publications

Publications Found: 1437

Terrestrial Carbon Cycle Variability
Baldocchi, D., Ryu, Y, Keenan, T

A growing literature is reporting on how the terrestrial carbon cycle is experiencing year-to-year variability because of climate anomalies and trends caused by global change. As CO2 concentration records in the atmosphere exceed 50 years and as satellite records reach over 30 years in length, we are becoming better able to address …


Journal: F1000Research, Volume : 1-9 (2016). DOI: 10.12688/f1000research.8962.1 Sites:

Warm spring reduced carbon cycle impact of the 2012 US summer drought
Wolf, S., Keenan, T.F., Fisher, J.B., Baldocchi, D.D., Desai, A.R., Richardson, A.D., Scott, R.L., Law, B.E., Litvak, M.E., Brunsell, N.A., Peters, W., van der Laan-Luijkx, I.T.

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

Short-term favorable weather conditions are an important control of interannual variability in carbon and water fluxes
Zscheischler, J., Fatichi, S., Wolf, S., Blanken, P., Bohrer, G., Clark, K., Desai, A., Hollinger, D., Keenan, T., Novick, K.A., Seneviratne, S.I.

Ecosystem models often perform poorly in reproducing interannual variability in carbon and water fluxes, resulting in considerable uncertainty when estimating the land-carbon sink. While many aggregated variables (growing season length, seasonal precipitation, or temperature) have been suggested as predictors for interannual variability …


Journal: Journal of Geophysical Research - Biogeosciences, Volume 121 (8): 2186-2198 (2016). DOI: 10.1002/2016JG003503 Sites: US-Bar, US-Ced, US-Ho1, US-MMS, US-NR1, US-PFa, US-Slt, US-UMB

Overstory species composition, structure, and conservation challenges of a mature, natural-origin pine stand after decades of management
Don C. Bragg

This study provides a preliminary assessment of 4 compartments on the Crossett
Experimental Forest (CEF) being restored to old-growth-like conditions. After being
partially cleared for agriculture or lumbered in the late 1910s, Compartments 1, 2, 11, and
12 were included in a combination of pulpwood-thinning and uneven-aged cutting-cycle
studies …


Journal: Southeastern Naturalist, Volume 15 (Special Issue 9): 16-41 (2016). DOI: Sites: US-Cst

How many measurements are needed to estimate accurate daily and annual soil respiration fluxes? Analysis using data from a temperate rainforest
Pérez-Quezada, J., Brito, C.E., Cabezas, J., Galleguillos, M., Fuentes, J.P., Bown, H., Franck, N.

Making accurate estimations of daily and annual Rs fluxes is key for understanding the carbon cycle process and projecting effects of climate change. In this study we used high-frequency sampling (24 measurements per day) of Rs in a temperate rainforest during 1 year, with the objective of answering the questions of when and how …


Journal: Biogeosciences, Volume 13: 6599-6609 (2016). DOI: 10.5194/bg-13-6599-2016 Sites: CL-SDF

The contribution of an overlooked transport process to a wetland’s methane emissions.
Poindexter, C. M., D. D. Baldocchi, J. H. Matthes, S. H. Knox, and E. A. Variano.

Wetland methane transport processes affect what portion of methane produced in wetlands reaches the atmosphere. We model what has been perceived to be the least important of these transport processes: hydrodynamic transport of methane through wetland surface water and show that its contribution to total methane emissions from a temperate …


Journal: Geophysical Research Letters, Volume 43: 6276-6284 (2016). DOI: 10.1002/2016gl068782 Sites: US-Tw1

Climate Indices Strongly Influence Old-Growth Forest Carbon Exchange
Matthias Falk

We present a decade and a half (1998-2013) of carbon dioxide fluxes from an old-growth stand in the American Pacific Northwest to identify ecosystem-level responses to Pacific teleconnection patterns, including the El Niño/Southern Oscillation (ENSO). This study provides the longest, continuous record of old-growth eddy flux data …


Journal: Environmental Research Letters, Volume 11: 1-12 (2016). DOI: Sites: US-Wrc

Terrestrial Carbon Balance In A Drier World: The Effects Of Water Availability In Southwestern North America
Biederman, J. A., Scott, R. L., Goulden, M. L., Vargas, R., Litvak, M. E., Kolb, T. E., Yepez, E. A., Oechel, W. C., Blanken, P. D., Bell, T. W., Garatuza-Payan, J., Maurer, G. E., Dore, S., Burns, S. P.

Global modeling efforts indicate semiarid regions dominate the increasing trend and interannual variation of net CO2 exchange with the atmosphere, mainly driven by water availability. Many semiarid …


Journal: Global Change Biology, Volume 22 (5): 1867-1879 (2016). DOI: 10.1111/gcb.13222 Sites: US-SRG, US-Whs, US-Wkg

Bayesian Optimization Of The Community Land Model Simulated Biosphere–Atmosphere Exchange Using CO2 Observations From A Dense Tower Network And Aircraft Campaigns Over Oregon
Schmidt, A., Law, B. E., Göckede, M., Hanson, C., Yang, Z., Conley, S.

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

Biophysical controls on interannual variability in ecosystem-scale CO2 and CH4 exchange in a California rice paddy.
Knox, S. H., J. H. Matthes, C. Sturtevant, P. Y. Oikawa, J. Verfaillie, and D. Baldocchi.

We present 6.5 years of eddy covariance measurements of fluxes of methane (FCH4) and carbon dioxide (FCO2) from a flooded rice paddy in Northern California, USA. A pronounced warming trend throughout the study associated with drought and record high temperatures strongly influenced carbon (C) budgets and provided insights into …


Journal: Journal of Geophysical Research-Biogeosciences, Volume 121: 978-1001 (2016). DOI: 10.1002/2015JG003247 Sites: US-Twt