Publications

Publications Found: 1437

Thinning Reduces Soil Carbon Dioxide But Not Methane Flux From Southwestern Usa Ponderosa Pine Forests
Sullivan, B., Kolb, T., Hart, S., Kaye, J., Dore, S., Montes-Helu, M.

Forest soils are important components of the global carbon cycle because they both store and release carbon. Carbon dioxide is released from soil to the atmosphere as a result of plant root and microbial respiration. Additionally, soils in dry forests are often sinks of methane from the atmosphere. Both carbon dioxide and methane …


Journal: Forest Ecology And Management, Volume 255 (12): 4047-4055 (2008). DOI: 10.1016/j.foreco.2008.03.051 Sites: US-Fmf, US-Fuf

Interannual Variation In Soil CO2 Efflux And The Response Of Root Respiration To Climate And Canopy Gas Exchange In Mature Ponderosa Pine
Irvine, J., Law, B. E., Martin, J. G., Vickers, D.

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

Canopy Structure And Atmospheric Flows In Relation To The δ13c Of Respired Co2 In A Subalpine Coniferous Forest
Schaeffer, S. M., Anderson, D. E., Burns, S. P., Monson, R. K., Sun, J., Bowling, D. R.

Stable isotopes provide insight into ecosystem carbon cycling, plant physiological processes, atmospheric boundary-layer dynamics, and are useful for the integration of processes over multiple scales. Of particular interest is the carbon isotope content (δ13C) of nocturnal ecosystem-respired CO2 (δR). Recent advances in technology …


Journal: Agricultural And Forest Meteorology, Volume 148 (4): 592-605 (2008). DOI: 10.1016/j.agrformet.2007.11.003 Sites: US-NR1

Effect Of Remote Sensing Spatial Resolution On Interpreting Tower-Based Flux Observations
Li, F., Kustas, W. P., Anderson, M. C., Prueger, J. H., Scott, R. L.

Validation comparisons between satellite-based surface energy balance models and tower-based flux measurements over heterogeneous landscapes can be strongly influenced by the spatial resolution of the remote sensing inputs. In this paper, a two-source energy balance model developed to use thermal and visible /near-infrared remotely …


Journal: Remote Sensing Of Environment, Volume 112 (2): 337-349 (2008). DOI: 10.1016/j.rse.2006.11.032 Sites: US-Whs, US-Wkg

Modeling Radiation And Photosynthesis Of A Heterogeneous Savanna Woodland Landscape With A Hierarchy Of Model Complexities
Chen, Q., Baldocchi, D., Gong, P., Dawson, T.

Simple but realistic modeling of radiation transfer within heterogeneous canopy has been a challenging research question for decades and is critical for predicting ecological processes such as photosynthesis. The Markov model proposed by [Nilson, T., 1971. A theoretical analysis of the frequency of gaps in plant stands. Agric. Meteorol. …


Journal: Agricultural And Forest Meteorology, Volume 148 (6-7): 1005-1020 (2008). DOI: 10.1016/j.agrformet.2008.01.020 Sites: US-Ton

Role Of Vegetation In Determining Carbon Sequestration Along Ecological Succession In The Southeastern United States
Stoy, P. C., Katul, G. G., Siqueira, M. B., Juang, J., Novick, K. A., Mccarthy, H. R., Oishi, A. C., Oren, R.

Vegetation plays a central role in controlling terrestrial carbon (C) exchange, but quantifying its impacts on C cycling on time scales of ecological succession is hindered …


Journal: Global Change Biology, Volume 14 (6): 1409-1427 (2008). DOI: 10.1111/j.1365-2486.2008.01587.x Sites: US-Dk3

Factors Controlling The Interannual Variability In The Carbon Balance Of A Southern Boreal Black Spruce Forest
Krishnan, P., Black, T. A., Barr, A. G., Grant, N. J., Gaumont-Guay, D., Nesic, Z.

Factors controlling the seasonal and interannual variability of net ecosystem
productivity (FNEP), gross ecosystem photosynthesis (Pg), ecosystem respiration (Re) and
evapotranspiration (E) of a mature boreal black spruce forest in central Saskatchewan,
Canada were investigated using eight years (1999–2006) of continuous eddy …


Journal: Journal Of Geophysical Research, Volume 113 (D9): (2008). DOI: doi:10.1029/2007JD008965 Sites: CA-Obs

The Contribution Of Advective Fluxes To Net Ecosystem Exchange In A High-Elevation, Subalpine Forest
Yi, C., Anderson, D. E., Turnipseed, A. A., Burns, S. P., Sparks, J. P., Stannard, D. I., Monson, R. K.

The eddy covariance technique, which is used in the determination of net ecosystem CO2 exchange (NEE), is subject to significant errors when advection that carries CO2 in the mean flow is ignored. We measured horizontal and vertical advective CO2 fluxes at the Niwot Ridge AmeriFlux site (Colorado, USA) using a measurement approach …


Journal: Ecological Applications, Volume 18 (6): 1379-1390 (2008). DOI: 10.1890/06-0908.1 Sites: US-NR1

Partitioning Net Ecosystem Carbon Exchange And The Carbon Isotopic Disequilibrium In A Subalpine Forest
ZOBITZ, J. M., BURNS, S. P., REICHSTEIN, M., BOWLING, D. R.

We investigate the utility of an improved isotopic method to partition the net ecosystem exchange of CO2 (F) into net photosynthesis (FA) and nonfoliar respiration (FR). Measurements of F and the carbon isotopic content in air at a high‐elevation coniferous forest (the Niwot Ridge AmeriFlux site) were used to partition F into FA …


Journal: Global Change Biology, Volume 14 (8): 1785-1800 (2008). DOI: 10.1111/j.1365-2486.2008.01609.x Sites: US-NR1

Effect Of Soil Water Stress On Soil Respiration And Its Temperature Sensitivity In An 18-Year-Old Temperate Douglas-Fir Stand
Jassal, R. S., Black, T. A., Novak, M. D., Gaumont-Guay, D., Nesic, Z.

We analyzed 17 months (August 2005 to December 2006) of continuous measurements of soil CO2 efflux or soil respiration (RS) in an 18-year-old west-coast temperate Douglas-fir stand that experienced somewhat greater than normal summertime water deficit. For soil water content at the 4 cm depth (θ) …


Journal: Global Change Biology, Volume 14 (6): 1305-1318 (2008). DOI: 10.1111/j.1365-2486.2008.01573.x Sites: CA-Ca1, CA-Ca2, CA-Ca3