Publications

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Publications Found: 82

Partitioning Net Ecosystem Exchange Of Co2: A Comparison Of A Bayesian/Isotope Approach To Environmental Regression Methods
Zobitz, J. M., Burns, S. P., Ogée, J., Reichstein, M., Bowling, D. R.

Separation of the net ecosystem exchange of CO2 (F) into its component fluxes of net photosynthesis (FA) and nonfoliar respiration (FR) is important in understanding the physical and environmental controls on these fluxes, and how these fluxes may respond to environmental change. In this paper, we evaluate a partitioning method based …


Journal: Journal Of Geophysical Research: Biogeosciences, Volume 112 (G3): n/a-n/a (2007). DOI: 10.1029/2006JG000282 Sites: US-NR1

Co2 Transport Over Complex Terrain
Sun, J., Burns, S. P., Delany, A. C., Oncley, S. P., Turnipseed, A. A., Stephens, B. B., Lenschow, D. H., LeMone, M. A., Monson, R. K., Anderson, D. E.

CO2 transport processes relevant for estimating net ecosystem exchange (NEE) at the Niwot Ridge AmeriFlux site in the front range of the Rocky Mountains, Colorado, USA, were investigated during a pilot experiment. We found that cold, moist, and CO2-rich air was transported downslope at night and upslope in the early morning at this …


Journal: Agricultural And Forest Meteorology, Volume 145 (1-2): 1-21 (2007). DOI: 10.1016/j.agrformet.2007.02.007 Sites: US-NR1

Winter Forest Soil Respiration Controlled By Climate And Microbial Community Composition
Monson, R. K., Lipson, D. L., Burns, S. P., Turnipseed, A. A., Delany, A. C., Williams, M. W., Schmidt, S. K.

Most terrestrial carbon sequestration at mid-latitudes in the Northern Hemisphere occurs in seasonal, montane forest ecosystems1. Winter respiratory carbon dioxide losses from these ecosystems are high, and over half of the carbon assimilated by photosynthesis in the summer can be lost the following winter2,3. The amount of winter …


Journal: Nature, Volume 439 (7077): 711-714 (2006). DOI: 10.1038/nature04555 Sites: US-NR1

The Contribution Of Beneath-Snow Soil Respiration To Total Ecosystem Respiration In A High-Elevation, Subalpine Forest
Monson, R. K., Burns, S. P., Williams, M. W., Delany, A. C., Weintraub, M., Lipson, D. A.

The respiratory loss of CO2 from soil microbes beneath winter snow in forests from cold climates can significantly influence the annual carbon budget. We explored the magnitude of winter soil respiration using continuous measurements of beneath‐snow CO2 concentration within the footprint of a flux tower in a subalpine forest in …


Journal: Global Biogeochemical Cycles, Volume 20 (3): n/a-n/a (2006). DOI: 10.1029/2005GB002684 Sites: US-NR1

Model-Data Synthesis Of Diurnal And Seasonal CO2 Fluxes At Niwot Ridge, Colorado
Sacks, W. J., Schimel, D. S., Monson, R. K., Braswell, B. H.

Eddy covariance records hold great promise for understanding the processes controlling the net ecosystem exchange of CO2 (NEE). However, NEE is the small difference …


Journal: Global Change Biology, Volume 12 (2): 240-259 (2006). DOI: 10.1111/j.1365-2486.2005.01059.x Sites: US-NR1

Modeling And Measuring The Nocturnal Drainage Flow In A High-Elevation, Subalpine Forest With Complex Terrain
Yi, C., Monson, R. K., Zhai, Z., Anderson, D. E., Lamb, B., Allwine, G., Turnipseed, A. A., Burns, S. P.

The nocturnal drainage flow of air causes significant uncertainty in ecosystem CO2, H2O, and energy budgets determined with the eddy covariance measurement approach. In this study, we examined the magnitude, nature, and dynamics of the nocturnal drainage flow in a subalpine forest ecosystem with complex terrain. …


Journal: Journal Of Geophysical Research, Volume 110 (D22303): n/a-n/a (2005). DOI: 10.1029/2005jd006282 Sites: US-NR1

Extensive Observations Of Co2carbon Isotope Content In And Above A High-Elevation Subalpine Forest
Bowling, D. R., Burns, S. P., Conway, T. J., Monson, R. K., White, J. W.

The dynamics of forest-atmosphere CO2 carbon isotope exchange were examined in a coniferous forest in Colorado, United States. Tunable diode laser absorption spectrometry provided extensive characterization of the carbon isotope content (δ13C) of CO2. Observed patterns in δ13C of forest …


Journal: Global Biogeochemical Cycles, Volume 19 (3): n/a-n/a (2005). DOI: 10.1029/2004gb002394 Sites: US-NR1

Spatial Analysis Of Growing Season Length Control Over Net Ecosystem Exchange
Churkina, G., Schimel, D., Braswell, B. H., Xiao, X.

Using data from 28 flux measurement sites, we performed an analysis of the relationship between annual net ecosystem exchange (NEE) and the length of the carbon uptake period …


Journal: Global Change Biology, Volume 11 (10): 1777-1787 (2005). DOI: 10.1111/j.1365-2486.2005.001012.x Sites: US-NR1

An Analysis Of Soil Respiration Across Northern Hemisphere Temperate Ecosystems
Hibbard, K. A., Law, B. E., Reichstein, M., Sulzman, J.

Over two-thirds of terrestrial carbon is stored belowground and a significant amount of atmospheric CO2 is respired by roots and microbes in soils. For this analysis, soil respiration (Rs) data were assembled from 31 AmeriFlux and CarboEurope sites representing deciduous broadleaf, evergreen needleleaf, grasslands, mixed …


Journal: Biogeochemistry, Volume 73 (1): 29-70 (2005). DOI: 10.1007/s10533-004-2946-0 Sites: US-Dk3, US-Ho1, US-Me2, US-Me4, US-Me5, US-NR1, US-Ton, US-UMB, US-WCr

Net Ecosystem Production In A Temperate Pine Plantation In Southeastern Canada
Arain, M. A., Restrepo-Coupe, N.

Eddy covariance measurements of carbon dioxide (CO2) and water vapour fluxes were made from June 2002 to May 2003 over a 65-year-old temperate conifer plantation forest in southern Ontario, Canada. This site is part of a newly initiated long-term tower flux measurement …


Journal: Agricultural And Forest Meteorology, Volume 128 (3-4): 223-241 (2005). DOI: 10.1016/j.agrformet.2004.10.003 Sites: CA-Ca1, CA-TP1, CA-TP2, CA-TP3, CA-TP4, US-Dk3, US-GLE, US-Ho1, US-Me4, US-Me5, US-NR1