AmeriFlux Publications from the Community

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), ISBN . 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

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

The carbon balance pivot point of southwestern U.S. semiarid ecosystems: Insights from the 21st century drought
Scott, R.L., Biederman, J.A., Hamerlynck, E.P., Barron-Gafford, G.

Global-scale studies indicate that semiarid regions strongly regulate the terrestrial carbon sink.
However, we lack understanding of how climatic shifts, such as decadal drought, impact carbon sequestration across the wide range of structural diversity in semiarid ecosystems. Therefore, we used eddy covariance measurements to quantify …

Journal: Journal of Geophysical Research: Biogeosciences, Volume 120: 2612-2624 (2015), ISBN . DOI: 10.1002/2015JG003181 Sites: US-SRG, US-SRM, US-Whs, US-Wkg

Landscape And Environmental Controls Over Leaf And Ecosystem Carbon Dioxide Fluxes Under Woody Plant Expansion
Barron-Gafford, G. A., Scott, R. L., Jenerette, G. D., Hamerlynck, E. P., Huxman, T. E.

Many regions of the globe are experiencing a simultaneous change in the dominant plant functional type and regional climatology. We explored how atmospheric temperature and precipitation control leaf- and ecosystem-scale carbon fluxes within a pair of semi-arid …

Journal: Journal Of Ecology, Volume 101 (6): 1471-1483 (2013), ISBN . DOI: 10.1111/1365-2745.12161 Sites: US-SRM
Posted: January 30, 2017

Landscape And Environmental Controls Over Leaf And Ecosystem Carbon Dioxide Fluxes Under Woody Plant Expansion
Barron-Gafford, G. A., Scott, R. L., Jenerette, G. D., Hamerlynck, E. P., Huxman, T. E.

Journal: Journal Of Ecology, Volume 101 (6): 1471-1483 (2013), ISBN . DOI: 10.1111/1365-2745.12161 Sites: US-LS2, US-SRM

Cool-Season Whole-Plant Gas Exchange Of Exotic And Native Semiarid Bunchgrasses
Hamerlynck, E. P., Scott, R. L., Barron-Gafford, G. A., Cavanaugh, M. L., Susan Moran, M., Huxman, T. E.

The success of invasive aridland plants may depend on their utilization of precipitation not fully exploited by native species, which could lead to seasonally altered ecosystem carbon and water fluxes. We measured volumetric soil water across 25-cm profiles (θ_25cm) and springtime whole-plant water- and carbon-fluxes of …

Journal: Plant Ecology, Volume 213 (8): 1229-1239 (2012), ISBN . DOI: 10.1007/s11258-012-0081-x Sites: US-SRM

The Relative Controls Of Temperature, Soil Moisture, And Plant Functional Group On Soil CO2 Efflux At Diel, Seasonal, And Annual Scales
Barron-Gafford, G.A., Scott, R.L., Jenerette, G.D., Huxman, T.E.

Soil respiration (R_soil) is a dominant, but variable, contributor to ecosystem CO₂ efflux. Understanding how variations in major environmental drivers, like temperature and …

Journal: Journal Of Geophysical Research, Volume 116 (G1): n/a-n/a (2011), ISBN . DOI: 10.1029/2010jg001442 Sites: US-SRM

Using Watershed Water Balance To Evaluate The Accuracy Of Eddy Covariance Evaporation Measurements For Three Semiarid Ecosystems
Scott, R. L.

The eddy covariance technique is a widely used and accepted method to quantify ecosystem-scale mass and energy fluxes. Eddy covariance measurements of evaporation, also known as evapotranspiration, are used to determine local, regional and global water budgets, calibrate …

Journal: Agricultural And Forest Meteorology, Volume 150 (2): 219-225 (2010), ISBN . DOI: 10.1016/j.agrformet.2009.11.002 Sites: US-SRM, US-Whs, US-Wkg

Woody Plants Modulate The Temporal Dynamics Of Soil Moisture In A Semi-Arid Mesquite Savanna
Potts, D. L., Scott, R. L., Bayram, S., Carbonara, J.

Climate variability and human activities interact to increase the abundance of woody plants in arid and semi-arid ecosystems worldwide. How woody plants interact with rainfall …

Journal: Ecohydrology, Volume 3 (1): 20-27 (2009), ISBN . DOI: 10.1002/eco.91 Sites: US-SRM

Effects Of Seasonal Drought On Net Carbon Dioxide Exchange From A Woody-Plant-Encroached Semiarid Grassland
Scott, R.L., Jenerette, G.D., Potts, D.L., Huxman, T.E.

Annual precipitation in the central and southern warm-desert region of North America is distributed climatologically between summer and winter periods with two prominent dry periods between them. We used energy and carbon dioxide (CO₂) fluxes from eddy covariance along with standard meteorological and soil moisture measurements …

Journal: Journal Of Geophysical Research: Biogeosciences, Volume 114 (G4): n/a-n/a (2009), ISBN . DOI: 10.1029/2008jg000900 Sites: US-SRM

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