AmeriFlux Publications from the Community

Does day and night sampling reduce spurious correlation between canopy photosynthesis and ecosystem respiration?
Dennis Baldocchi, Cove Sturtevant

It is necessary to partition eddy covariance measurements of carbon dioxide exchange into its offsetting gross fluxes, canopy photosynthesis, and ecosystem respiration, to understand the biophysical controls on the net fluxes. And independent estimates of canopy photosynthesis (G) and ecosystem respiration (R) are needed to validate …

Journal: Agricultural and Forest Meteorology, Volume 207: 117-126 (2015), ISBN . DOI: 10.1016/j.agrformet.2015.03.010 Sites: CA-Ca1, CA-Ca2, CA-Ca3, CA-Let, CA-Mer, CA-NS1, CA-NS3, CA-NS5, CA-NS6, CA-NS7, CA-Oas, CA-Obs, CA-Ojp, CA-Qcu, CA-Qfo, CA-SJ2, CA-SJ3, CA-TP4, CA-WP1, US-ARM, US-Aud, US-Bo1, US-Ho1, US-Ho2, US-IB2, US-KS2, US-MMS, US-MOz, US-NC2, US-NR1, US-SO2, US-SO3, US-SO4, US-SP2, US-SP3, US-SRM, US-Ton, US-Tw3, US-UMB, US-Var, US-WBW, US-Wkg, US-Wrc

Characterizing The Diurnal Patterns of Errors in The Prediction of Evapotranspiration by Several Land-Surface Models: An Nacp Analysis
Matheny, A. M., Bohrer, G., Stoy, P. C., Baker, I. T., Black, A. T., Desai, A. R., Dietze, M. C., Gough, C. M., Ivanov, V. Y., Jassal, R. S., Novick, K. A., Schäfer, K. V., Verbeeck, H.

Journal: Journal Of Geophysical Research: Biogeosciences, Volume 119 (7): 1458-1473 (2014), ISBN . 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

Coarse Root Distribution Of A Semi-Arid Oak Savanna Estimated With Ground Penetrating Radar
Raz-Yaseef, N., Koteen, L., Baldocchi, D. D.

The binary nature of Northern California’s ecohydrology, in which water is either abundantly available or scarce, should be reflected in the root architecture of the native blue oak. Our objective was to quantify carbon storage and understand how the form of the root system facilitates ecosystem functioning despite the asynchrony …

Journal: Journal Of Geophysical Research: Biogeosciences, Volume 118 (1): 135-147 (2013), ISBN . DOI: 10.1029/2012jg002160 Sites: US-Ton

Use Of Change-Point Detection For Friction–Velocity Threshold Evaluation In Eddy-Covariance Studies
Barr, A., Richardson, A., Hollinger, D., Papale, D., Arain, M., Black, T., Bohrer, G., Dragoni, D., Fischer, M., Gu, L., Law, B., Margolis, H., McCaughey, J., Munger, J., Oechel, W., Schaeffer, K.

Journal: Agricultural And Forest Meteorology, Volume 171-172: 31-45 (2013), ISBN . DOI: 10.1016/j.agrformet.2012.11.023 Sites: CA-Ca1, CA-Ca2, CA-Ca3, CA-Gro, CA-Let, CA-Mer, CA-NS1, CA-Oas, CA-Obs, CA-Ojp, CA-Qfo, CA-SJ1, CA-SJ2, CA-SJ3, CA-TP4, CA-WP1, US-ARM, US-Dk3, US-Ha1, US-Ho1, US-IB1, US-Los, US-Me3, US-Me5, US-MMS, US-MOz, US-Ne1, US-Ne2, US-Ne3, US-NR1, US-Shd, US-SO2, US-Syv, US-Ton, US-UMB, US-Var, US-WCr

Modeling Energy And Carbon Fluxes In A Heterogeneous Oak Woodland: A Three-Dimensional Approach
Kobayashi, H., Baldocchi, D. D., Ryu, Y., Chen, Q., Ma, S., Osuna, J. L., Ustin, S. L.

Most land surface and ecosystem models assume that a vegetated canopy can be abstracted as a turbid medium when such models compute mass, energy, and carbon exchange. However, those models fail to simulate radiation environments in heterogeneous landscapes. This study aims to couple a spatially explicit three-dimensional (3D) shortwave …

Journal: Agricultural And Forest Meteorology, Volume 152: 83-100 (2012), ISBN . DOI: 10.1016/j.agrformet.2011.09.008 Sites: US-Ton

Are Temporal Variations Of Leaf Traits Responsible For Seasonal And Inter-Annual Variability In Ecosystem CO2 Exchange?
Ma, S., Baldocchi, D. D., Mambelli, S., Dawson, T. E.

Seasonal and inter-annual variability in ecosystem carbon dioxide (CO₂) exchange is attributed to numerous climate drivers. However, climate effects on metabolism often override ecological functions. This study seeks insight into which biological and ecological processes influence temporal patterns of ecosystem …

Journal: Functional Ecology, Volume 25 (1): 258-270 (2011), ISBN . DOI: 10.1111/j.1365-2435.2010.01779.x Sites: US-Ton
Posted: January 31, 2017

On The Differential Advantages Of Evergreenness And Deciduousness In Mediterranean Oak Woodlands: A Flux Perspective
Baldocchi, D. D., Ma, S., Rambal, S., Misson, L., Ourcival, J., Limousin, J., Pereira, J., Papale, D.

We assessed the differential advantages of deciduousness and evergreenness by examining 26 site-years of carbon dioxide, water vapor, and energy flux measurements from five comparable oak woodlands in France, Italy, Portugal, and California (USA). On average, the evergreen and deciduous oak woodlands assimilated and respired similar …

Journal: Ecological Applications, Volume 20 (6): 1583-1597 (2010), ISBN . DOI: 10.1890/08-2047.1 Sites: US-Ton

How To Quantify Tree Leaf Area Index In An Open Savanna Ecosystem: A Multi-Instrument And Multi-Model Approach
Ryu, Y., Sonnentag, O., Nilson, T., Vargas, R., Kobayashi, H., Wenk, R., Baldocchi, D. D.

Savannas are spatially heterogeneous, open ecosystems, thus efforts to quantify canopy structure with methods developed for homogeneous, closed canopies are prone to failure. We examine the applicability of two direct (litterfall, allometry) and five indirect (LAI-2000, …

Journal: Agricultural And Forest Meteorology, Volume 150 (1): 63-76 (2010), ISBN . DOI: 10.1016/j.agrformet.2009.08.007 Sites: US-Ton

Groundwater Uptake By Woody Vegetation In A Semiarid Oak Savanna
Miller, G. R., Chen, X., Rubin, Y., Ma, S., Baldocchi, D. D.

Groundwater can serve as an important resource for woody vegetation in semiarid landscapes, particularly when soil water is functionally depleted and unavailable to plants. This study examines the uptake of groundwater by deciduous blue oak trees (Quercus douglasii) in a California oak savanna. Here we present a suite of …

Journal: Water Resources Research, Volume 46 (10): n/a-n/a (2010), ISBN . DOI: 10.1029/2009wr008902 Sites: US-Ton

The Dynamics Of Energy, Water, And Carbon Fluxes In A Blue Oak (Quercus Douglasii) Savanna In California
Baldocchi, D., Chen, Q., Chen, X., Ma, S., Miller, G., Ryu, Y., Xiao, J., Wenk, R., Battles, J.

Journal: Ecosystem Function In Savannas, Volume : 135-151 (2010), ISBN . DOI: 10.1201/b10275-10 Sites: US-Ton

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