Publications

Publications Found: 1437

Enhancement Of Carbon Sequestration In US Soils
Post, W. M., Izaurralde, R. C., Jastrow, J. D., McCarl, B. A., Amonette, J. E., Bailey, V. L., Jardine, P. M., West, T. O., Zhou, J.
Improved practices in agriculture, forestry, and land management could be used to increase soil carbon and thereby significantly reduce the concentration of atmospheric carbon dioxide. Understanding biological and edaphic processes that increase and retain soil carbon can lead to specific manipulations that …


Journal: Bioscience, Volume 54 (10): 895-908 (2004). DOI: 10.1641/0006-3568(2004)054[0895:eocsiu]2.0.co;2 Sites: US-IB1, US-IB2

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). DOI: 10.1016/s0168-1923(03)00158-8 Sites: US-Dk3, US-NR1, US-WBW

Seasonal Variation In Carbon Dioxide Exchange Over A Mediterranean Annual Grassland In California
Xu, L., Baldocchi, D. D.

Understanding how environmental variables affect the processes that regulate the carbon flux over grassland is critical for large-scale modeling research, since grasslands comprise almost one-third of the earth’s natural vegetation. To address this issue, fluxes of CO2 (Fc, flux toward the …


Journal: Agricultural And Forest Meteorology, Volume 123 (1-2): 79-96 (2004). DOI: 10.1016/j.agrformet.2003.10.004 Sites: US-Var

Impact Of Elevated Atmospheric CO2 on Forest Floor Respiration In A Temperate Pine Forest
Suwa, M., Katul, G. G., Oren, R., Andrews, J., Pippen, J., Mace, A., Schlesinger, W. H.

The effects of elevated atmospheric CO2 (CO2e) on soil respiration were evaluated using inverse models and static chamber measurements collected over 4.5 years in a maturing loblolly pine forest. The chamber measurements of forest floor CO2 efflux showed that the flux enhancement increased …


Journal: Global Biogeochemical Cycles, Volume 18 (2): n/a-n/a (2004). DOI: 10.1029/2003gb002182 Sites: US-Dk3

Effects Of Logging On Carbon Dynamics Of A Jack Pine Forest In Saskatchewan, Canada
Howard, E. A., Gower, S. T., Foley, J. A., Kucharik, C. J.

We calculated carbon budgets for a chronosequence of harvested jack pine (Pinus banksiana Lamb.) stands (0-, 5-, 10-, and∼29-year-old) and a∼79-year-old stand …


Journal: Global Change Biology, Volume 10 (8): 1267-1284 (2004). DOI: 10.1111/j.1529-8817.2003.00804.x Sites: CA-Ojp

Seasonal Variation And Partitioning Of Ecosystem Respiration In A Southern Boreal Aspen Forest
Griffis, T., Black, T., Gaumont-Guay, D., Drewitt, G., Nesic, Z., Barr, A., Morgenstern, K., Kljun, N.

Continuous automatic chamber and eddy covariance (EC) measurements were made at an old aspen forest (SOA) located at southern boreal treeline in Saskatchewan, Canada to examine the temporal variability in soil (Rs), tree bole (Rb), and ecosystem respiration (RE) during 2001. …


Journal: Agricultural And Forest Meteorology, Volume 125 (3-4): 207-223 (2004). DOI: 10.1016/j.agrformet.2004.04.006 Sites: CA-Oas

Photosynthesis, Carboxylation And Leaf Nitrogen Responses Of 16 Species To Elevated pCO2 Across Four Free-Air CO2 Enrichment Experiments In Forest, Grassland And Desert
Ellsworth, D. S., Reich, P. B., Naumburg, E. S., Koch, G. W., Kubiske, M. E., Smith, S. D.

The magnitude of changes in carboxylation capacity in dominant plant species under long-term elevated CO2 exposure (elevated pCa) directly impacts …


Journal: Global Change Biology, Volume 10 (12): 2121-2138 (2004). DOI: 10.1111/j.1365-2486.2004.00867.x Sites: US-Dk1, US-Dk2, US-Dk3

The Robustness Of Eddy Correlation Fluxes For Amazon Rain Forest Conditions
Kruijt, B., Elbers, J. A., von Randow, C., Araújo, A. C., Oliveira, P. J., Culf, A., Manzi, A. O., Nobre, A. D., Kabat, P., Moors, E. J.

We analyzed errors and uncertainties in time-integrated eddy correlation data for sites in the Amazon. A well-known source of potential error in eddy correlation is through possible advective losses of CO2emissions during calm nights. There are also questions related to the treatment of low frequencies, non-horizontal …


Journal: Ecological Applications, Volume 14 (sp4): 101-113 (2004). DOI: 10.1890/02-6004 Sites: BR-Ma2, BR-Sa1, BR-Sa3

Creating Spatially Contiguous Yield Classes For Site-Specific Management
Ping, J. L., Dobermann, A.

Annual yield maps are spatially fragmented because of random variation caused by crop management as well as measurement errors. Two approaches for creating maps of spatially contiguous yield classes were evaluated at two irrigated sites. In the first approach, prior-classification interpolation (PCI), grid size was increased from …


Journal: Agronomy Journal, Volume 95 (5): 1121-1131 (2003). DOI: 10.2134/agronj2003.1121 Sites: US-Ne1, US-Ne2, US-Ne3

Post-Fire Carbon Dioxide Fluxes In The Western Canadian Boreal Forest: Evidence From Towers, Aircraft And Remote Sensing
Amiro, B. D., Ian MacPherson, J., Desjardins, R. L., Chen, J. M., Liu, J.

Recent CO2 flux measurements from towers and aircraft (net ecosystem exchange by eddy covariance) and remote sensing/modeling (net primary productivity—NPP) following fire show that the regenerating boreal forest in western Canada has a low initial flux that …


Journal: Agricultural And Forest Meteorology, Volume 115 (1-2): 91-107 (2003). DOI: 10.1016/s0168-1923(02)00170-3 Sites: CA-SF2, CA-SF3