Publications

Publications Found: 1437

Quantifying Biogenic And Anthropogenic Contributions To Acetone Mixing Ratios In A Rural Environment
Goldstein, A. H., Schade, G. W.

Acetone was one of the most abundant volatile organic compounds (VOCs) observed in the Sierra Nevada Mountains (California, USA). Mixing ratios were measured hourly above a ponderosa pine plantation using an automated in situ dual-channel GC-FID system throughout July 1997, …


Journal: Atmospheric Environment, Volume 34 (29-30): 4997-5006 (2000). DOI: 10.1016/s1352-2310(00)00321-6 Sites: US-Blo

Surface Heat Flux Estimation With Wind-Profiler/RASS And Radiosonde Observations
Jacobs, J. M., Coulter, R. L., Brutsaert, W.

A bulk ABL similarity approach was used to make regional estimates of the sensible heat flux by combining surface temperature measurements with mixed layer temperature and wind speed profiles. The mixed layer profiles were measured by a 915 MHz Profiler/Radio Acoustic Sounding …


Journal: Advances In Water Resources, Volume 23 (4): 339-348 (2000). DOI: 10.1016/s0309-1708(99)00028-7 Sites: US-Wlr

Long-Term Impacts Of Agriculture On Soil Carbon And Nitrogen In New England Forests
Compton, J. E., Boone, R. D.

Abandonment and reforestation of agricultural lands has been a major influence on the landscape of eastern North America. Cultivation and soil amendments can dramatically alter soil nutrient pools and cycling, yet few studies have examined the long-term (>50 yr) influence of pasturing and cultivation on soil processes in the forests …


Journal: Ecology, Volume 81 (8): 2314-2330 (2000). DOI: 10.1890/0012-9658(2000)081[2314:ltioao]2.0.co;2 Sites: US-LPH

Transpiration And Whole-Tree Conductance In Ponderosa Pine Trees Of Different Heights
Ryan, M. G., Bond, B. J., Law, B. E., Hubbard, R. M., Woodruff, D., Cienciala, E., Kucera, J.

Changes in leaf physiology with tree age and size could alter forest growth, water yield, and carbon fluxes. We measured tree water flux (Q) for 14 ponderosa pine trees in two size classes (12 m tall and ∼40 years old, …


Journal: Oecologia, Volume 124 (4): 553-560 (2000). DOI: 10.1007/s004420000403 Sites: US-Me4

Land-Atmosphere Energy Exchange In Arctic Tundra And Boreal Forest: Available Data And Feedbacks To Climate
Eugster, W., Rouse, W. R., Pielke Sr, R. A., Mcfadden, J. P., Baldocchi, D. D., Kittel, T. G., Chapin, F. S., Liston, G. E., Vidale, P. L., Vaganov, E., Chambers, S.

This paper summarizes and analyses available data on the surface energy balance of Arctic tundra and boreal forest. The complex interactions between ecosystems and their surface energy balance are also examined, including climatically induced shifts in ecosystem type that might amplify or reduce the effects of potential climatic …


Journal: Global Change Biology, Volume 6 (S1): 84-115 (2000). DOI: 10.1046/j.1365-2486.2000.06015.x Sites: US-Upa

Kinetics Of Nitrogen Uptake By Populus Tremuloides In Relation To Atmospheric CO2 And Soil Nitrogen Availability
Rothstein, D. E., Zak, D. R., Pregitzer, K. S., Curtis, P. S.
Sustained increases in plant production in response to elevated atmospheric carbon dioxide (CO2) concentration may be constrained by the availability of soil nitrogen (N). However, it is possible that plants will respond to N limitation at elevated CO2 concentration by increasing the …


Journal: Tree Physiology, Volume 20 (4): 265-270 (2000). DOI: 10.1093/treephys/20.4.265 Sites: US-UMB

Photosynthetic Acclimation To Elevated Atmospheric CO2 Concentration In The Florida Scrub-Oak Species Quercus Geminata And Quercus Myrtifolia Growing In Their Native Environment
Li, J., Dijkstra, P., Hinkle, C. R., Wheeler, R. M., Drake, B. G.

Long-term effects of elevated CO2 concentration (ambient plus 350 μmol mol−1) on leaf photosynthetic acclimation of two species of a scrub-oak community, Quercus myrtifolia Willd. and Quercus geminata Small, were studied. Plants of both species were grown in open-top chambers in their natural …


Journal: Tree Physiology, Volume 19 (4-5): 229-234 (1999). DOI: 10.1093/treephys/19.4-5.229 Sites: US-KS2

Effects Of Climatic Variability On The Annual Carbon Sequestration By A Boreal Aspen Forest
Chen, W. J., Black, T. A., Yang, P. C., Barr, A. G., Neumann, H. H., Nesic, Z., Blanken, P. D., Novak, M. D., Eley, J., Ketler, R. J., Cuenca, R.

To evaluate the carbon budget of a boreal deciduous forest, we measured CO2 fluxes using the eddy covariance technique above an old aspen (OA) forest in Prince Albert National Park, Saskatchewan, Canada, in 1994 and 1996 as part of the Boreal Ecosystem-Atmosphere Study (BOREAS). We found that the OA forest is a strong …


Journal: Global Change Biology, Volume 5 (1): 41-53 (1999). DOI: 10.1046/j.1365-2486.1998.00201.x Sites: CA-Oas

Effect Of Spring Burning On The Surface Energy Balance In A Tallgrass Prairie
Bremer, D. J., Ham, J. M.

Spring burning of dead biomass in tallgrass prairie is a common practice that may influence heat and water vapor transport from the landscape. Bowen ratio methods were used to measure the surface energy balances and evapotranspiration (ET) from burned (B) and unburned (UB) prairie near Manhattan, KS, USA. Data were collected from …


Journal: Agricultural And Forest Meteorology, Volume 97 (1): 43-54 (1999). DOI: 10.1016/s0168-1923(99)00034-9 Sites: US-KFB, US-Kon

Canopy Fluxes Of 2-Methyl-3-Buten-2-Ol Over A Ponderosa Pine Forest By Relaxed Eddy Accumulation: Field Data And Model Comparison
Baker, B., Guenther, A., Greenberg, J., Goldstein, A., Fall, R.

Canopy level flux measurements of 2-methyl-3-buten-2-ol (MBO) were made over a 7 year old ponderosa pine plantation in the Sierra Nevada range of California using the relaxed eddy accumulation method. Fluxes …


Journal: Journal Of Geophysical Research: Atmospheres, Volume 104 (D21): 26107-26114 (1999). DOI: 10.1029/1999jd900749 Sites: US-Blo