Publications

Publications Found: 1437

Relationship Between Soil CO2 Concentrations And Forest-Floor CO2 Effluxes
Jassal, R., Black, A., Novak, M., Morgenstern, K., Nesic, Z., Gaumont-Guay, D.

To better understand the biotic and abiotic factors that control soil CO2 efflux, we compared seasonal and diurnal variations in simultaneously measured forest-floor CO2effluxes and soil CO2 concentration profiles in a 54-year-old Douglas fir forest on the east coast of Vancouver Island. …


Journal: Agricultural And Forest Meteorology, Volume 130 (3-4): 176-192 (2005). DOI: 10.1016/j.agrformet.2005.03.005 Sites: CA-Ca1

Carbon Budget Of Mature No-Till Ecosystem In North Central Region Of The United States
Hollinger, S. E., Bernacchi, C. J., Meyers, T. P.

Continuous measurements of carbon flux from 1997 to 2002 by eddy-covariance were used to evaluate the carbon budget for a maize (Zea mays L.) and soybean (Glycine max (L.) Merr.) rotation agricultural ecosystem that has been in no-till cultivation for over …


Journal: Agricultural And Forest Meteorology, Volume 130 (1-2): 59-69 (2005). DOI: 10.1016/j.agrformet.2005.01.005 Sites: US-Bo1, US-Bo2

The Conversion Of The Corn/Soybean Ecosystem To No-Till Agriculture May Result In A Carbon Sink
Bernacchi, C. J., Hollinger, S. E., Meyers, T.

Mitigating or slowing an increase in atmospheric carbon dioxide concentration ([CO2]) has been the focus of international efforts, most apparent with the development …


Journal: Global Change Biology, Volume 11 (11): 1867-1872 (2005). DOI: 10.1111/j.1365-2486.2005.01050.x Sites: US-Bo1, US-Bo2

Observations Of Oxidation Products Above A Forest Imply Biogenic Emissions Of Very Reactive Compounds
Holzinger, R., Lee, A., Paw, K. T., Goldstein, A. H.

Vertical gradients of mixing ratios of volatile organic compounds have been measured in a Ponderosa pine forest in Central California (38.90° N, 120.63° W, 1315m). These measurements reveal large quantities of previously unreported oxidation products of short lived biogenic precursors. The emission of biogenic precursors must be …


Journal: Atmospheric Chemistry And Physics, Volume 5 (1): 67-75 (2005). DOI: 10.5194/acp-5-67-2005 Sites: US-Blo

Coupling Of Canopy Gas Exchange With Root And Rhizosphere Respiration In A Semi-Arid Forest
Irvine, J., Law, B. E., Kurpius, M. R.

The strength of coupling between canopy gas exchange and root respiration was examined in ~15-yr-old ponderosa pine (Pinus ponderosa Doug. Ex Laws.) growing under seasonally drought stressed conditions. By regularly watering …


Journal: Biogeochemistry, Volume 73 (1): 271-282 (2005). DOI: 10.1007/s10533-004-2564-x Sites: US-Me2, US-Me5

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). DOI: 10.1007/s00442-005-0169-2 Sites: US-NR1

Examining Strategies To Improve The Carbon Balance Of Corn/Soybean Agriculture Using Eddy Covariance And Mass Balance Techniques
Baker, J., Griffis, T.

There is much interest in the role that agricultural practices might play in sequestering carbon to help offset rising atmospheric CO2 concentrations. A number of management methods that might increase soil C levels have been suggested, but there are scant available data to properly support recommendations or policy changes. …


Journal: Agricultural And Forest Meteorology, Volume 128 (3-4): 163-177 (2005). DOI: 10.1016/j.agrformet.2004.11.005 Sites: US-Ro1

Changes In Soil Microbial Community Structure In A Tallgrass Prairie Chronosequence
Allison, V. J., Miller, R. M., Jastrow, J. D., Matamala, R., Zak, D. R.

Increasing the abundance of fungi relative to bacteria should favor C accrual, because fungi use C more efficiently, and are composed of more recalcitrant C compounds. We examined changes in soil microbial community structure following cessation of tillage-based agriculture and through subsequent succession in a C-accruing tallgrass …


Journal: Soil Science Society Of America Journal, Volume 69 (5): 1412-1421 (2005). DOI: 10.2136/sssaj2004.0252 Sites: US-IB1, US-IB2

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