Climate, vegetation cover, and management create finescale heterogeneity in unirrigated agricultural regions, with important but not well-quantified consequences for spatial and temporal variations in surface CO2, water, and heat fluxes. Eddy covariance fluxes were measured in seven agricultural fields—comprising winter wheat, …
Journal: Earth Interactions, Volume 11 (17): 1-21 (2007). DOI: 10.1175/EI231.1 Sites: US-ARM
Journal: Tellus, Volume 59B: 223-233 (2007). DOI: Sites: US-Uaf
Journal: J. Agric. Meteorol., Volume 63: 171-183 (2007). DOI: Sites: US-Uaf
CO2 transport processes relevant for estimating net ecosystem exchange (NEE) at the Niwot Ridge AmeriFlux site in the front range of the Rocky Mountains, Colorado, USA, were investigated during a pilot experiment. We found that cold, moist, and CO2-rich air was transported downslope at night and upslope in the early morning at this …
Journal: Agricultural And Forest Meteorology, Volume 145 (1-2): 1-21 (2007). DOI: 10.1016/j.agrformet.2007.02.007 Sites: US-NR1
Separation of the net ecosystem exchange of CO2 (F) into its component fluxes of net photosynthesis (FA) and nonfoliar respiration (FR) is important in understanding the physical and environmental controls on these fluxes, and how these fluxes may respond to environmental change. In this paper, we evaluate a partitioning method based …
Journal: Journal Of Geophysical Research: Biogeosciences, Volume 112 (G3): n/a-n/a (2007). DOI: 10.1029/2006JG000282 Sites: US-NR1
Journal: Forest Ecology And Management, Volume 244 (1-3): 60-67 (2007). DOI: 10.1016/j.foreco.2007.03.039 Sites: US-UMB
Journal: Global Change Biology, Volume 13 (9): 1935-1949 (2007). DOI: 10.1111/j.1365-2486.2007.01406.x Sites: US-UMB
We investigated how the distribution of precipitation over a growing season influences the coupling
of carbon and water cycle components in a semiarid floodplain woodland dominated by the deep-rooted velvet mesquite (Prosopis velutina). Gross ecosystem production (GEP) and ecosystem respiration (Reco) were frequently uncoupled because …
Journal: Ecosystems, Volume 10 (7): 1100-1115 (2007). DOI: 10.1007/s10021-007-9079-y Sites: US-CMW
Understanding seasonal variations of photosynthetic parameters is critical for accurate modeling of carbon dioxide (CO2) uptake by ecosystems. Maximum carboxylation velocity (Vcmax), maximum rate of electron transport (Jmax), leaf respiration in the light (Rday), …
Journal: Tree Physiology, Volume 26 (6): 729-741 (2006). DOI: 10.1093/treephys/26.6.729 Sites: US-Blo
A long-term flux measurement station has been established in a 74-year-old mixedwood forest ecosystem, located approximately 80 km west of Timmins in northern Ontario, as part of the Fluxnet-Canada Research Network (FCRN). Measurements of energy, water vapour, and carbon …
Journal: Agricultural And Forest Meteorology, Volume 140 (1-4): 79-96 (2006). DOI: 10.1016/j.agrformet.2006.08.010 Sites: CA-Gro