The influences of soil water supply and atmospheric demand on transpiration were studied to gain insight into the physical mechanisms limiting forest water use within the broader context of total canopy water loss to the atmosphere. Evaporation from forests (E) can be partitioned in to four main source components: canopy …
Journal: Journal Of Geophysical Research, Volume 113 (G4): n/a-n/a (2008), ISBN . DOI: 10.1029/2007JG000653 Sites: CA-TP1, CA-TP3, CA-TP4
Forest evapotranspiration (ET) estimates that include scaled sap flux measurements often underestimate eddy covariance (EC)-measured latent heat flux (LE). We investigated potential causes for this bias using 4 years of coupled sap flux and LE measurements from a mature …
Journal: Agricultural And Forest Meteorology, Volume 148 (11): 1719-1732 (2008), ISBN . DOI: 10.1016/j.agrformet.2008.06.013 Sites: US-Dk3
Simple but realistic modeling of radiation transfer within heterogeneous canopy has been a challenging research question for decades and is critical for predicting ecological processes such as photosynthesis. The Markov model proposed by [Nilson, T., 1971. A theoretical analysis of the frequency of gaps in plant stands. Agric. Meteorol. …
Journal: Agricultural And Forest Meteorology, Volume 148 (6-7): 1005-1020 (2008), ISBN . DOI: 10.1016/j.agrformet.2008.01.020 Sites: US-Ton
The recovery of ecosystem C and N dynamics after disturbance can be a slow process. Chronosequence approaches offer unique opportunities to use space-for-time substitution to quantify the recovery of ecosystem …
Journal: Ecological Applications, Volume 18 (6): 1470-1488 (2008), ISBN . DOI: 10.1890/07-1609.1 Sites: US-IB1, US-IB2
Forest evapotranspiration (ET) estimates that include scaled sap flux measurements often underestimate eddy covariance (EC)-measured latent heat flux (LE). We investigated potential causes for this bias using 4 years of coupled sap flux and LE measurements from a mature oak-hickory forest in North Carolina, USA. We focused on accuracy …
Journal: Agricultural And Forest Meteorology, Volume 148 (11): 1719-1732 (2008), ISBN . DOI: 10.1016/j.agrformet.2008.06.013 Sites: US-Dk2
Process-based models are effective tools to synthesize and/or extrapolate measured carbon (C) exchanges from individual sites to large scales. In this study, we used a C- and …
Journal: Global Change Biology, Volume 14 (8): 1765-1784 (2008), ISBN . DOI: 10.1111/j.1365-2486.2008.01612.x Sites: CA-TP1, CA-TP3, CA-TP4
Vegetation plays a central role in controlling terrestrial carbon (C) exchange, but quantifying its impacts on C cycling on time scales of ecological succession is hindered …
Journal: Global Change Biology, Volume 14 (6): 1409-1427 (2008), ISBN . DOI: 10.1111/j.1365-2486.2008.01587.x Sites: US-Dk3
Quantifying isotopic CO2 exchange between the biosphere and atmosphere presents a significant measurement challenge, but has the potential to provide important constraints on local, regional, and global carbon cycling. Past approaches have indirectly estimated isotopic CO2 exchange using relaxed eddy accumulation, …
Journal: Journal Of Geophysical Research, Volume 113 (D8): n/a-n/a (2008), ISBN . DOI: 10.1029/2007JD009297 Sites: US-Ro1
- Climate change projections predict an intensifying hydrologic cycle and an increasing frequency of droughts, yet quantitative understanding of the effects on ecosystem carbon exchange remains limited.
- Here, the effect of contrasting precipitation and soil moisture dynamics were evaluated …
Journal: New Phytologist, Volume 179 (3): 818-828 (2008), ISBN . DOI: 10.1111/j.1469-8137.2008.02501.x Sites: US-Oho
Ponderosa pine (Pinus ponderosa) forests of the southwestern United States are a mosaic of stands where undisturbed forests are carbon sinks, and stands recovering from wildfires may be sources of carbon to the atmosphere for decades after the fire. However, the relative magnitude of these sinks and sources has never been …
Journal: Global Change Biology, Volume 14 (8): 1801-1820 (2008), ISBN . DOI: 10.1111/j.1365-2486.2008.01613.x Sites: US-Fuf, US-Fwf