Publications

Publications Found: 1437

Respiratory Carbon Losses And The Carbon-Use Efficiency Of A Northern Hardwood Forest, 1999-2003
Curtis, P. S., Vogel, C. S., Gough, C. M., Schmid, H. P., Su, H. B., Bovard, B. D.
  • Quantitative assessment of carbon (C) storage by forests requires an understanding of climatic controls over respiratory C loss. Ecosystem respiration can be estimated biometrically as the sum (RΣ) of soil (Rs), leaf (Rl) and wood (Rw) …

    Journal: New Phytologist, Volume 167 (2): 437-456 (2005). DOI: 10.1111/j.1469-8137.2005.01438.x Sites: US-UMB

Testing A Model Of CO2, Water And Energy Exchange In Great Plains Tallgrass Prairie And Wheat Ecosystems
Hanan, N. P., Berry, J. A., Verma, S. B., Walter-Shea, E. A., Suyker, A. E., Burba, G. G., Denning, A. S.

A land surface model (a modified version of the Simple Biosphere Model, Version 2; SiB2) was parameterized and tested against two years of eddy covariance flux measurements made over un-grazed tallgrass prairie and a winter wheat field in Oklahoma, USA. The land surface model computed 30-min estimates of sensible and latent heat …


Journal: Agricultural And Forest Meteorology, Volume 131 (3-4): 162-179 (2005). DOI: 10.1016/j.agrformet.2005.05.009 Sites: US-Pon, US-Shd

An Improved Analysis Of Forest Carbon Dynamics Using Data Assimilation
Williams, M., Schwarz, P. A., Law, B. E., Irvine, J., Kurpius, M. R.

There are two broad approaches to quantifying landscape C dynamics – by measuring changes in C stocks over time, or by measuring fluxes of C directly. However, these data may be patchy, and have gaps or biases. An alternative approach to generating C budgets has been to use process-based models, constructed to simulate the key …


Journal: Global Change Biology, Volume 11 (1): 89-105 (2005). DOI: 10.1111/j.1365-2486.2004.00891.x Sites: US-Me5

Predicting The Onset Of Net Carbon Uptake By Deciduous Forests With Soil Temperature And Climate Data: A Synthesis Of FLUXNET Data
Baldocchi, D. D., Black, T. A., Curtis, P. S., Falge, E., Fuentes, J. D., Granier, A., Gu, L., Knohl, A., Lee, X., Pilegaard, K., Schmid, H. P., Valentini, R., Wilson, K., Wofsy, S., Xu, L., Yamamoto, S.

We tested the hypothesis that the date of the onset of net carbon uptake by temperate deciduous forest canopies corresponds with the time when the mean daily soil temperature equals the mean annual air temperature. The hypothesis was tested using over 30 …


Journal: International Journal Of Biometeorology, Volume 49 (6): 377-387 (2005). DOI: 10.1007/s00484-005-0256-4 Sites: US-MMS

Nitrous Oxide Emission From No-Till Irrigated Corn
Ginting, D., Eghball, B.

Field experiments were conducted to determine optimal time during the day for N2O flux determination and to evaluate the effects of wheel traffic and soil parameters on N2O fluxes following urea ammonium nitrate (UAN) injection and summer UAN fertigations. The experiments were located on silty clay loam soils …


Journal: Soil Science Society Of America Journal, Volume 69 (3): 915-925 (2005). DOI: 10.2136/sssaj2004.0292 Sites: US-Ne1, US-Ne2, US-Ne3

Carbon And Biomass Partitioning In Balsam Fir (Abies Balsamea)
Xing, Z., Bourque, C. P., Swift, D. E., Clowater, C. W., Krasowski, M., Meng, F.
Balsam fir (Abies balsamea (L.) Mill) was extensively sampled to investigate the effects of forest management practices, site location, within-crown position, tree component (i.e., stem, foliage, branches and roots), and tree social classes on biomass and carbon (C) partitioning at the individual …


Journal: Tree Physiology, Volume 25 (9): 1207-1217 (2005). DOI: 10.1093/treephys/25.9.1207 Sites: CA-Na1

Continuous Measurements Of Soil Respiration With And Without Roots In A Ponderosa Pine Plantation In The Sierra Nevada Mountains
Tang, J., Misson, L., Gershenson, A., Cheng, W., Goldstein, A. H.

Continuous measurements of soil respiration and its components help us understand diurnal and seasonal variations in soil respiration and its mechanism. We continuously measured CO2 concentration at various depths in the soil and calculated surface CO2efflux …


Journal: Agricultural And Forest Meteorology, Volume 132 (3-4): 212-227 (2005). DOI: 10.1016/j.agrformet.2005.07.011 Sites: US-Blo

Atmospheric Aerosol Light Scattering And Surface Wetness Influence The Diurnal Pattern Of Net Ecosystem Exchange In A Semi-Arid Ponderosa Pine Plantation
Misson, L., Lunden, M., McKay, M., Goldstein, A. H.

The diurnal variation of net ecosystem exchange (NEE) showed an unusual pattern at the Blodgett Forest Ameriflux site, with late afternoon NEE lower than early morning (indicating more uptake), while air temperature and atmospheric vapor pressure deficit were much higher. …


Journal: Agricultural And Forest Meteorology, Volume 129 (1-2): 69-83 (2005). DOI: 10.1016/j.agrformet.2004.11.008 Sites: US-Blo

Annual Carbon Dioxide Exchange In Irrigated And Rainfed Maize-Based Agroecosystems
Verma, S. B., Dobermann, A., Cassman, K. G., Walters, D. T., Knops, J. M., Arkebauer, T. J., Suyker, A. E., Burba, G. G., Amos, B., Yang, H., Ginting, D., Hubbard, K. G., Gitelson, A. A., Walter-Shea, E. A.

Carbon dioxide exchange was quantified in maize–soybean agroecosystems employing year-round tower eddy covariance flux systems and measurements of soil C stocks, CO2fluxes from the soil surface, plant biomass, and litter decomposition. Measurements were made in three cropping systems: (a) irrigated continuous maize, …


Journal: Agricultural And Forest Meteorology, Volume 131 (1-2): 77-96 (2005). DOI: 10.1016/j.agrformet.2005.05.003 Sites: US-Ne1, US-Ne2, US-Ne3

Soil Properties Differently Influence Estimates Of Soil CO2 Efflux From Three Chamber-Based Measurement Systems
Butnor, J. R., Johnsen, K. H., Maier, C. A.

Soil CO2 efflux is a major component of net ecosystem productivity (NEP) of forest systems. Combining data from multiple researchers for larger-scale modeling and assessment will only be valid if their methodologies provide directly comparable …


Journal: Biogeochemistry, Volume 73 (1): 283-301 (2005). DOI: 10.1007/s10533-004-4022-1 Sites: US-Dk2, US-Dk3