The interest of this study was to develop an initial assessment on the potential importance of biomass heat and biochemical energy storages for land-atmosphere interactions, an issue that has been largely neglected so far. We conducted flux tower observations and model simulations at a temperate deciduous forest site in central Missouri …
Journal: Journal Of Geophysical Research: Atmospheres, Volume 112 (D2): n/a-n/a (2006), ISBN . DOI: 10.1029/2006jd007425 Sites: US-MOz
Net primary productivity (NPP) is enhanced under future atmospheric [CO2] in temperate forests representing a broad range of productivity. Yet questions remain in regard to how elevated [CO2]-induced NPP enhancement may be affected by climatic variations and limiting nutrient resources, as well as how this additional …
Journal: Proceedings Of The National Academy Of Sciences, Volume 103 (51): 19356-19361 (2006), ISBN . DOI: 10.1073/pnas.0609448103 Sites: US-Dk3
We compared four existing process-based stand-level models of varying complexity (physiological principles in predicting growth, photosynthesis and evapotranspiration, biogeochemical …
Journal: Global Change Biology, Volume 12 (7): 1189-1207 (2006), ISBN . DOI: 10.1111/j.1365-2486.2006.01158.x Sites: US-Dk2
Comparisons were made among Douglas-fir forest, aspen (broad leaf deciduous) forest and wheatgrass (C3) grassland for ecosystem-level water-use efficiency (WUE). WUE was defined as the ratio of photosynthetic CO2 assimilation rate and evapotranspiration (ET) rate. The ET data measured by eddy covariance were …
Journal: Global Change Biology, Volume 12 (2): 294-310 (2006), ISBN . DOI: 10.1111/j.1365-2486.2005.01103.x Sites: CA-Ca1, CA-Let, CA-Oas
Forests play a significant role in the global carbon (C) cycle. Variability in weather, species, stand age, and current and past disturbances are some of the factors that control stand-level C dynamics. This study examines the relative roles of stand age and associated structural …
Journal: Agricultural And Forest Meteorology, Volume 140 (1-4): 6-22 (2006), ISBN . DOI: 10.1016/j.agrformet.2006.03.018 Sites: CA-Ca1, CA-Ca2, CA-Ca3
Woody debris (WD) is an important component of forest C budgets, both as a C reservoir and source of CO2 to the atmosphere. We used an infrared gas analyzer and closed dynamic chamber to measure CO2 efflux from downed coarse WD (CWD; diameter≥7.5 cm) and fine WD (FWD; 7.5 cm>diameter≥2 cm) to assess …
Journal: Oecologia, Volume 148 (1): 108-117 (2006), ISBN . DOI: 10.1007/s00442-006-0356-9 Sites: US-Ha1
The major driving factors of soil CO2 production – substrate supply, temperature, and water content – vary vertically within the soil profile, with the greatest …
Journal: Global Change Biology, Volume 12 (6): 944-956 (2006), ISBN . DOI: 10.1111/j.1365-2486.2005.01142.x Sites: US-LPH
Atmospheric aerosols from natural and anthropogenic processes have both primary and secondary origins, and can influence human health, visibility, and climate. One key process affecting atmospheric concentrations of aerosols is the formation of new particles and their subsequent growth to larger particle sizes. A field study was …
Journal: Aerosol Science And Technology, Volume 40 (5): 373-388 (2006), ISBN . DOI: 10.1080/02786820600631896 Sites: US-Blo
Journal: Tree Physiology, Volume 26 (7): 833-844 (2006), ISBN . DOI: 10.1093/treephys/26.7.833 Sites: US-Blo
The flux of isoprene, one of the more reactive biogenic volatile organic compounds, was measured using eddy covariance techniques on a continuous basis during the 2000–2002 growing seasons at a mixed hardwood forest in northern lower MI. Daytime fluxes of isoprene and both sensible (H) and latent heat flux (LE) were linearly …
Journal: Agricultural And Forest Meteorology, Volume 136 (3-4): 188-202 (2006), ISBN . DOI: 10.1016/j.agrformet.2004.11.013 Sites: US-UMB