The seasonal and interannual variability in surface energy exchange and evapotranspiration (E) of two temperate semi-arid grasslands in southeastern Arizona, USA, were investigated using multi-year (2004–2007) eddy covariance measurements. The study sites, a post-fire site (AG) and an unburned site (KG), received 43–87% …
Journal: Agricultural And Forest Meteorology, Volume 153: 31-44 (2012), ISBN . DOI: 10.1016/j.agrformet.2011.09.017 Sites: US-Wkg
The stable carbon isotope ratio,
Journal:
Agricultural And Forest Meteorology, Volume 153: 144-153 (2012), ISBN . DOI: 10.1016/j.agrformet.2011.09.018
Sites: US-Ro1
Journal: Global Change Biology, Volume 18 (10): 3171-3185 (2012), ISBN . DOI: 10.1111/j.1365-2486.2012.02775.x Sites: US-Fmf, US-Fuf, US-Fwf
Deep root water uptake and hydraulic redistribution (HR) have been shown to play a major role in forest ecosystems during drought, but little is known about the impact of climate change, fertilization and soil characteristics on HR and its consequences on water and carbon fluxes. Using data from three mid-rotation loblolly pine plantations, …
Journal: Tree Physiology, Volume 32 (6): 707-723 (2012), ISBN . DOI: 10.1093/treephys/tps018 Sites: US-NC1, US-NC2
New observations of the vertically integrated CO2 mixing ratio, ⟨CO2⟩, from ground-based remote sensing show that variations in CO2⟩ are primarily determined by large-scale flux patterns. They therefore provide fundamentally different information than observations made …
Journal: Biogeosciences, Volume 9 (3): 875-891 (2012), ISBN . DOI: 10.5194/bg-9-875-2012 Sites: US-PFa
Uncertainties in model projections of carbon cycling in terrestrial ecosystems stem from inaccurate parameterization of incorporated processes (endogenous uncertainties) and processes or drivers that are not accounted for by the model (exogenous uncertainties). Here, we assess endogenous and exogenous uncertainties using a model-data …
Journal: Global Change Biology, Volume 18 (8): 2555-2569 (2012), ISBN . DOI: 10.1111/j.1365-2486.2012.02684.x Sites: US-Ha1
Timber harvests remove a significant portion of ecosystem carbon. While some of the wood products moved off-site may last past the harvest cycle of the particular forest crop, the effect of the episodic disturbances …
Journal: Global Change Biology, Volume 18 (10): 3186-3201 (2012), ISBN . DOI: 10.1111/j.1365-2486.2012.02776.x Sites: US-NC1, US-NC2
The effects of climatic factors and vegetation type on evapotranspiration (E) and water use efficiency (WUE) were analyzed using tower-based eddy-covariance (EC) data for nine mature forest sites, two peatland sites and one grassland site across an east–west …
Journal: Agricultural And Forest Meteorology, Volume 153: 14-30 (2012), ISBN . DOI: 10.1016/j.agrformet.2011.04.008 Sites: CA-TP4
Five years of eddy-covariance and other measurements at a mature ponderosa pine forest and a nearby young plantation are used to contrast the carbon fluxes for long-term averages, seasonal patterns, diel patterns and interannual variability, and to examine …
Journal: Tellus Series B-Chemical and Physical Meteorology, Volume 64 (0): 17159-n/a (2012), ISBN . DOI: 10.3402/tellusb.v64i0.17159 Sites: US-Me2
Forest harvest and subsequent stand development can have major effects on the carbon cycle of boreal stands. Carbon dioxide (CO2) fluxes of a three-point black spruce harvest chronosequence located in the boreal forest of eastern North America were measured over a one-year period at the ecosystem scale with the eddy covariance …
Journal: Agricultural And Forest Meteorology, Volume 153: 94-105 (2012), ISBN . DOI: 10.1016/j.agrformet.2011.07.009 Sites: CA-Qcu