AmeriFlux Publications from the Community

Evapotranspiration over Spatially Extensive Plant Communities in the Big Cypress National Preserve, Southern Florida, 2007–2010
W. Barclay Shoemaker

Evapotranspiration (ET) was quantified over plant communities within the Big Cypress National Preserve (BCNP) using the eddy covariance method for a period of 3 years from October 2007 to September 2010. Plant communities selected for study included Pine Upland, Wet Prairie, Marsh, Cypress Swamp, and Dwarf Cypress. These plant communities …

Journal: U.S. Geological Survey Scientific Investigations Report, Volume : , ISBN ISBN 978 1 4113 3301 7. DOI: Sites:

Evaporation from Lake Superior: 1. Physical controls and processes

The surface energy balance of Lake Superior was measured using the eddy covariance method at a remote, offshore site at 0.5-h intervals from June 2008 through November 2010. Pronounced seasonal patterns in the surface energy balance were observed, with a five-month delay between maximum summer net radiation and maximum winter latent …

Journal: Journal of Great Lakes Research, Volume 37 (4): 707-716 (2011), ISBN . DOI: 10.1016/j.jglr.2011.08.009 Sites: US-GL1

Evaporation From Lake Superior: 2 Spatial distribution and variability
Spence, C., Blanken, P., Hedstrom, N., Fortin, V., Wilson, H.

Evaporation is a critical component of the water balance of each of the Laurentian Great Lakes, and it is expected that because of their shear size, evaporation cannot be spatially or temporally uniform. Despite this, examples of spatially distributed estimates of evaporation in the scientific literature are rare for most of the …

Journal: Journal Of Great Lakes Research, Volume 37 (4): 717-724 (2011), ISBN . DOI: 10.1016/j.jglr.2011.08.013 Sites: US-GL1

Separation Of Net Ecosystem Exchange Into Assimilation And Respiration Using A Light Response Curve Approach: Critical Issues And Global Evaluation
Lasslop, G., Reichstein, M., Papale, D., Richardson, A. D., Arneth, A., Barr, A., Stoy, P., Wohlfahrt, G.

The measured net ecosystem exchange (NEE) of CO₂ between the ecosystem and the atmosphere reflects the balance between gross CO₂ assimilation [gross primary production (GPP)] and ecosystem respiration (R_eco). For understanding the mechanistic responses of ecosystem processes to environmental change …

Journal: Global Change Biology, Volume 16 (1): 187-208 (2010), ISBN . DOI: 10.1111/j.1365-2486.2009.02041.x Sites: BR-Ma2

Interannual, Seasonal, And Diel Variation In Soil Respiration Relative To Ecosystem Respiration At A Wetland To Upland Slope At Harvard Forest
Phillips, S. C., Varner, R. K., Frolking, S., Munger, J. W., Bubier, J. L., Wofsy, S. C., Crill, P. M.

Soil carbon dioxide efflux (soil respiration, SR) was measured with eight autochambers at two locations along a wetland to upland slope at Harvard Forest over a 4 year period, 2003–2007. SR was consistently higher in the upland plots than at the wetland margin during the late summer/early fall. Seasonal and diel hystereses with …

Journal: Journal Of Geophysical Research: Biogeosciences, Volume 115 (G2): n/a-n/a (2010), ISBN . DOI: 10.1029/2008jg000858 Sites: US-Ha1

Age Effects On Carbon Fluxes In Temperate Pine Forests
Peichl, M., Arain, M. A., Brodeur, J. J.

This study evaluates age-related patterns of ecosystem carbon (C) fluxes in a chronosequence (5-, 18-, 33-, and 68-year old in 2007) of planted pine (Pinus strobus L.) forests in southern Ontario, Canada, from 2003 to 2007. Carbon fluxes determined with the eddy covariance technique were normalized by differences in site …

Journal: Agricultural And Forest Meteorology, Volume 150 (7-8): 1090-1101 (2010), ISBN . DOI: 10.1016/j.agrformet.2010.04.008 Sites: CA-TP1, CA-TP2, CA-TP3, CA-TP4

Estimating Annual Carbon Dioxide Eddy Fluxes Using Open-Path Analysers For Cold Forest Sites
Amiro, B.

Annual net ecosystem production (NEP) was estimated at three boreal forest sites where open-path infrared gas analysers were used in eddy covariance systems. The analysers showed apparent ecosystem uptake of carbon dioxide during frozen conditions where small net respiration …

Journal: Agricultural And Forest Meteorology, Volume 150 (10): 1366-1372 (2010), ISBN . DOI: 10.1016/j.agrformet.2010.06.007 Sites: CA-SF1, CA-SF2, CA-SF3

Carbon Dioxide And Methane Fluxes From Arctic Mudboils
Wilson, K. S., Humphreys, E. R.

Climate change is expected to alter the Arctic’s carbon (C) balance and changes in these C-rich ecosystems may contribute to a positive feedback on global climate change. Low-center mudboils, a form of patterned ground in the Arctic, are distinct landforms in which the exchange of greenhouse gases between the atmosphere and soil …

Journal: Canadian Journal Of Soil Science, Volume 90 (3): 441-449 (2010), ISBN . DOI: 10.4141/CJSS09073 Sites: CA-DL2

How To Quantify Tree Leaf Area Index In An Open Savanna Ecosystem: A Multi-Instrument And Multi-Model Approach
Ryu, Y., Sonnentag, O., Nilson, T., Vargas, R., Kobayashi, H., Wenk, R., Baldocchi, D. D.

Savannas are spatially heterogeneous, open ecosystems, thus efforts to quantify canopy structure with methods developed for homogeneous, closed canopies are prone to failure. We examine the applicability of two direct (litterfall, allometry) and five indirect (LAI-2000, …

Journal: Agricultural And Forest Meteorology, Volume 150 (1): 63-76 (2010), ISBN . DOI: 10.1016/j.agrformet.2009.08.007 Sites: US-Ton

Global Convergence In The Temperature Sensitivity Of Respiration At Ecosystem Level
Mahecha, M. D., Reichstein, M., Carvalhais, N., Lasslop, G., Lange, H., Seneviratne, S. I., Vargas, R., Ammann, C., Arain, M. A., Cescatti, A., Janssens, I. A., Migliavacca, M., Montagnani, L., Richardson, A. D.

As climate change accelerates, it is important to know the likely impact of climate change on the carbon cycle (see the Perspective by Reich). Gross primary production (GPP) …

Journal: Science, Volume 329 (5993): 838-840 (2010), ISBN . DOI: 10.1126/science.1189587 Sites: BR-Ma2

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