Publications

Publications Found: 1437

Direct And Indirect Effects Of Elevated CO2 On Transpiration From Quercus Myrtifolia In A Scrub-Oak Ecosystem
Li, J., Dugas, W. A., Hymus, G. J., Johnson, D. P., Hinkle, C. R., Drake, B. G., Hungate, B. A.

Elevated atmospheric carbon dioxide (Ca) usually reduces stomatal conductance, but the effects on plant transpiration in the field are not well understood. Using …


Journal: Global Change Biology, Volume 9 (1): 96-105 (2003). DOI: 10.1046/j.1365-2486.2003.00557.x Sites: US-KS2

Gas-Phase Chemistry Dominates O3 Loss To A Forest, Implying A Source Of Aerosols And Hydroxyl Radicals To The Atmosphere
Kurpius, M. R., Goldstein, A. H.

Tropospheric ozone (O3) effectively deposits to forested ecosystems but the fate of O3 within the forest canopy is unresolved. We partitioned total measured ecosystem daytime O3 deposition to a ponderosa pine (Pinus ponderosa) forest into its major loss pathways; stomatal uptake, non-stomatal …


Journal: Geophysical Research Letters, Volume 30 (7): n/a-n/a (2003). DOI: 10.1029/2002gl016785 Sites: US-Blo

Assessing Soil CO2 Efflux Using Continuous Measurements Of CO2 Profiles In Soils With Small Solid-State Sensors
Tang, J., Baldocchi, D. D., Qi, Y., Xu, L.

This paper describes a new method to monitor continuously soil CO2 profiles using small solid-state CO2 sensors buried at different depths of the soil. Based on the measurement of soil CO2 profile and a gaseous diffusivity model, we estimated …


Journal: Agricultural And Forest Meteorology, Volume 118 (3-4): 207-220 (2003). DOI: 10.1016/s0168-1923(03)00112-6 Sites: US-Ton

Cross Validation Of Open-Top Chamber And Eddy Covariance Measurements Of Ecosystem CO2 Exchange In A Florida Scrub-Oak Ecosystem
Dore, S., Hymus, G. J., Johnson, D. P., Hinkle, C. R., Valentini, R., Drake, B. G.

Simultaneous measurements of net ecosystem CO2 exchange (NEE) were made in a Florida scrub-oak ecosystem in August 1997 and then every month between April 2000 to …


Journal: Global Change Biology, Volume 9 (1): 84-95 (2003). DOI: 10.1046/j.1365-2486.2003.00561.x Sites: US-KS1, US-KS2

Novel Technique For Remote Estimation Of CO2 Flux In Maize
Gitelson, A. A., Verma, S. B, Rundquist, D. C., Keydan, G., Leavitt, B., Arkebauer, T. J., Burba, G. G., Suyker, A. E.

[1] There is considerable interest in assessing the magnitude of carbon sources and sinks for agricultural lands, grasslands, and forests. In this paper, we propose a novel …


Journal: Geophysical Research Letters, Volume 30 (9): 1486-n/a (2003). DOI: 10.1029/2002GL016543 Sites: US-Ne1, US-Ne2

Influences Of Temperature History, Water Stress, And Needle Age On Methylbutenol Emissions
Gray, D. W., Lerdau, M. T., Goldstein, A. H.

Volatile organic compounds emitted by plants have long been recognized as having important influences on tropospheric chemistry, most notably in contributing to the production of tropospheric ozone and aerosols. One such compound, methylbutenol (MBO), was recently identified as a major component of the volatiles emitted by ponderosa …


Journal: Ecology, Volume 84 (3): 765-776 (2003). DOI: 10.1890/0012-9658(2003)084[0765:iothws]2.0.co;2 Sites: US-Blo

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

The Effects Of Elevated CO2 On Nutrient Distribution In A Fire-Adapted Scrub Oak Forest
Johnson, D. W., Hungate, B. A., Dijkstra, P., Hymus, G., Hinkle, C. R., Stiling, P., Drake, B. G.

Elevated carbon dioxide (CO2) caused greater accumulation of carbon (C) and nutrients in both vegetation and O horizons over a 5-yr sampling period in a scrub oak ecosystem in Florida. Elevated CO2 had no effect on any measured soil property except extractable phosphorus (P), which was lower with elevated CO2


Journal: Ecological Applications, Volume 13 (5): 1388-1399 (2003). DOI: 10.1890/02-5139 Sites: US-KS2

Novel Technique For Remote Estimation Of CO2 Flux In Maize
Gitelson, A. A., Verma, S. B., Rundquist, D. C., Keydan, G., Leavitt, B., Arkebauer, T. J., Burba, G. G., Suyker, A. E.

There is considerable interest in assessing the magnitude of carbon sources and sinks for agricultural lands, grasslands, and forests. In this paper, we propose a novel technique to remotely assess CO2 fluxes in maize using reflectances (ρ) in two spectral channels either in the green around 550 nm or in the red edge …


Journal: Geophysical Research Letters, Volume 30 (9): 1486-n/a (2003). DOI: 10.1029/2002gl016543 Sites: US-Ne3