AmeriFlux Publications from the Community

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), ISBN . 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), ISBN . DOI: 10.1029/2005GB002684 Sites: US-NR1

Midday Values Of Gross CO2 Flux And Light Use Efficiency During Satellite Overpasses Can Be Used To Directly Estimate Eight-Day Mean Flux
Sims, D. A., Rahman, A. F., Cordova, V. D., Baldocchi, D. D., Flanagan, L. B., Goldstein, A. H., Hollinger, D. Y., Misson, L., Monson, R. K., Schmid, H. P., Wofsy, S. C., Xu, L.

Most satellites provide, at best, a single daily snapshot of vegetation and, at worst, these snapshots may be separated by periods of many days when the ground was obscured by cloud cover. Since vegetation carbon exchange can be very dynamic on diurnal and day-to-day timescales, the limited temporal resolution of satellite data is …

Journal: Agricultural And Forest Meteorology, Volume 131 (1-2): 1-12 (2005), ISBN . DOI: 10.1016/j.agrformet.2005.04.006 Sites: CA-Let, US-Blo, US-Ho1, US-MMS, US-NR1, US-Ton, US-Var

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), ISBN . DOI: 10.1029/2004gb002394 Sites: US-NR1

Climatic Influences On Net Ecosystem CO2 Exchange During The Transition From Wintertime Carbon Source To Springtime Carbon Sink In A High-Elevation, Subalpine Forest
Monson, R. K., Sparks, J. P., Rosenstiel, T. N., Scott-Denton, L. E., Huxman, T. E., Harley, P. C., Turnipseed, A. A., Burns, S. P., Backlund, B., Hu, J.

The transition between wintertime net carbon loss and springtime net carbon assimilation has an important role in controlling the annual rate of carbon uptake in coniferous forest ecosystems. We studied the contributions of springtime carbon assimilation …

Journal: Oecologia, Volume 146 (1): 130-147 (2005), ISBN . DOI: 10.1007/s00442-005-0169-2 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), ISBN . 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), ISBN . 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

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), ISBN . DOI: 10.1029/2005jd006282 Sites: US-NR1

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), ISBN . 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

Gap-Filling Missing Data In Eddy Covariance Measurements Using Multiple Imputation (MI) For Annual Estimations
Hui, D., Wan, S., Su, B., Katul, G., Monson, R., Luo, Y.

Missing data is a ubiquitous problem in evaluating long-term experimental measurements, such as those associated with the FluxNet project, due to the equipment failures, system maintenance, power-failure, and lightning strikes among other things. To estimate annual values …

Journal: Agricultural And Forest Meteorology, Volume 121 (1-2): 93-111 (2004), ISBN . DOI: 10.1016/s0168-1923(03)00158-8 Sites: US-Dk3, US-NR1, US-WBW