Publications

Publications Found: 1378

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. A.

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 (12): 2612-2624 (2015), ISBN . DOI: 10.1002/2015JG003181 Sites: US-SRG, US-Whs, US-Wkg

Forest Ecosystem Respiration Estimated From Eddy Covariance And Chamber Measurements Under High Turbulence And Substantial Tree Mortality From Bark Beetles
Speckman, H. N., Frank, J. M., Bradford, J. B., Miles, B. L., Massman, W. J., Parton, W. J., Ryan, M. G.

Eddy covariance nighttime fluxes are uncertain due to potential measurement biases. Many studies report eddy covariance nighttime flux lower than flux from extrapolated chamber measurements, despite corrections …


Journal: Global Change Biology, Volume 21 (2): 708-721 (2015), ISBN . DOI: 10.1111/gcb.12731 Sites: US-GLE

Landscape-Level Terrestrial Methane Flux Observed From A Very Tall Tower
Desai, A. R., Xu, K., Tian, H., Weishampel, P., Thom, J., Baumann, D., Andrews, A. E., Cook, B. D., King, J. Y., Kolka, R.

Simulating the magnitude and variability of terrestrial methane sources and sinks poses a challenge to ecosystem models because the biophysical and biogeochemical processes that lead to methane emissions from terrestrial and freshwater ecosystems are, by their nature, episodic and spatially disjunct. As a consequence, model predictions …


Journal: Agricultural And Forest Meteorology, Volume 201: 61-75 (2015), ISBN . DOI: 10.1016/j.agrformet.2014.10.017 Sites: US-PFa

Divergence Of Actual And Reference Evapotranspiration Observations For Irrigated Sugarcane With Windy Tropical Conditions
Anderson, R. G., Wang, D., Tirado-Corbalá, R., Zhang, H., Ayars, J. E.

Standardized reference evapotranspiration (ET) and ecosystem-specific vegetation coefficients are frequently used to estimate actual ET. However, equations for calculating reference ET have not been well validated in tropical environments. We measured ET (ETEC) using eddy covariance (EC) towers at two irrigated sugarcane …


Journal: Hydrology And Earth System Sciences, Volume 19 (1): 583-599 (2015), ISBN . DOI: 10.5194/hess-19-583-2015 Sites: US-SuS, US-SuW

Radiocarbon-based partitioning of soil respiration in an old-growth coniferous forest
Taylor, A.J., Lai, C.-T., Hopkins, F.M., Wharton, S., Bible, K., Xu, X., Phillips, C., Bush, S., Ehleringer, J.R.

Temperate forests play an important role in the global
carbon cycle, and are thought to currently be a sink for
atmospheric CO2. However,we lack understanding of
the drivers of forest carbon accumulation and loss,
hampering our ability to predict carbon cycle
responses to global change. In this study,we used CO2
flux and radiocarbon …


Journal: Ecosystems, Volume 18: 459-470 (2015), ISBN . DOI: Sites: US-Wrc

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

2015. Identifying scale-emergent, non-linear, asynchronous processes of wetland methane exchange.
Sturtevant, C., B. L. Ruddell, S. H. Knox, J. Verfaillie, J. H. Matthes, P. Y. Oikawa, and D. Baldocchi.


Journal: Journal of Geophysical Research: Biogeosciences, Volume 121: 188-204 (2015), ISBN . DOI: 10.1002/2015jg003054 Sites: US-Myb

Understory CO2, Sensible Heat, and Latent Heat Fluxes in a Black Spruce Forest in Interior Alaska


Journal: Agricultural And Forest Meteorology, Volume 214-215: 80-90 (2015), ISBN . DOI: 10.1016/j.agrformet.2015.08.247 Sites: US-Prr

Carbon Exchange Over Four Growing Seasons For A Subarctic Sedge Fen In Northern Manitoba, Canada
Hanis, K. L., Amiro, B. D., Tenuta, M., Papakyriakou, T., Swystun, K. A.

Net ecosystem exchange of carbon was measured using eddy covariance for four growing seasons at a subarctic hummocky fen in northern Manitoba, Canada. Over a 115 day measurement period each year, cumulative net ecosystem exchange of carbon ranged from a gain of 49 g C m−2 to a loss of 16 g C m−2 with a mean loss of 6 g C m−2 …


Journal: Arctic Science, Volume 1 (2): 27-44 (2015), ISBN . DOI: 10.1139/as-2015-0003 Sites: CA-CF1, CA-CF2

Indirect nitrous oxide emissions from streams within the US Corn Belt scale with stream order
Turner, P.A., Griffis, T.J., Lee, X. Baker, J.M., Venterea, R.T., Wood, J.D.


Journal: PNAS, Volume 112: 9839-9843 (2015), ISBN . DOI: doi: 10.1073/pnas.1503598112 Sites: US-KCM