Observations of net ecosystem exchange (NEE) of carbon and its biophysical drivers have been collected at the AmeriFlux site in the Morgan-Monroe State Forest (MMSF) in Indiana, USA since 1998. Thus, this is one of the few deciduous forest sites in the world, where a decadal analysis on net ecosystem productivity (NEP) trends is …
Journal: Global Change Biology, Volume 17 (2): 886-897 (2011), ISBN . DOI: 10.1111/j.1365-2486.2010.02281.x Sites: US-MMS
Southwestern North America faces an imminent transition to a warmer, more arid climate, and it is critical to understand how these changes will affect the carbon balance of southwest ecosystems. In order to test our hypothesis that differential responses of production and respiration to temperature and moisture shape the carbon balance …
Journal: Global Change Biology, Volume 17 (1): 410-424 (2011), ISBN . DOI: 10.1111/j.1365-2486.2010.02269.x Sites: US-Mpj, US-Seg, US-Ses, US-Vcm, US-Vcp, US-Wjs
A carbon (C) and nitrogen (N) cycle-coupled model, CLASS-CTEMN+ was developed by incorporating soil and plant N cycling algorithms in the Canadian Land Surface Scheme (CLASS) and the Canadian Terrestrial Ecosystem Model (CTEM), used in the Canadian Global …
Journal: Ecological Modelling, Volume 222 (20-22): 3743-3760 (2011), ISBN . DOI: 10.1016/j.ecolmodel.2011.09.008 Sites: CA-TP4
Turf-grass lawns are ubiquitous in the United States. However direct measurements of land–atmosphere fluxes using the eddy-covariance method above lawn ecosystems are challenging due to the typically small dimensions of lawns and the heterogeneity of land use in an urbanised landscape. Given their typically small patch sizes, there …
Journal: Boundary-Layer Meteorology, Volume 138 (2): 215-230 (2011), ISBN . DOI: 10.1007/s10546-010-9558-0 Sites: US-KUT
We calibrated upward sensing profiling and downward sensing scanning LiDAR systems to estimates of canopy fuel loading developed from field plots and allometric equations, and then used the LiDAR datasets to predict canopy bulk density (CBD) and crown fuel weight (CFW) in wildfire prone stands in the New Jersey Pinelands. …
Journal: Remote Sensing Of Environment, Volume 115 (2): 703-714 (2011), ISBN . DOI: 10.1016/j.rse.2010.10.012 Sites: US-Ced
Much of our biogeochemical understanding of forest disturbances comes from studies of severe or stand-replacing events, which may have different impacts on coupled carbon (C) and nitrogen (N) cycling than …
Journal: Journal Of Geophysical Research, Volume 116 (G04016): n/a-n/a (2011), ISBN . DOI: 10.1029/2011JG001758 Sites: US-UMd
Severe wildfire may cause long-term changes in the soil-atmosphere exchange of carbon dioxide and methane, two gases known to force atmospheric warming. We examined the effect of a severe wildfire 10 years after burning to determine decadal-scale changes in soil gas fluxes following fire, and explored mechanisms responsible for …
Journal: Biogeochemistry, Volume 104 (1-3): 251-265 (2011), ISBN . DOI: 10.1007/s10533-010-9499-1 Sites: US-Fuf, US-Fwf
High-elevation forests represent a large fraction of potential carbon uptake in North America, but this uptake is not well constrained by observations. Additionally, forests in the Rocky Mountains have recently been severely damaged by drought, fire, and insect outbreaks, which have been quantified at local scales but not assessed …
Journal: Journal Of Geophysical Research, Volume 116 (G04009): 1-16 (2011), ISBN . DOI: 10.1029/2011JG001655 Sites: US-NR1
Agricultural drainage is thought to alter greenhouse gas emissions from temperate peatlands, with CH4 emissions reduced in favor of greater CO2 losses. Attention has largely focussed on C trace gases, and less is known about the impacts …
Journal: Ecosystems, Volume 14 (2): 311-325 (2011), ISBN . DOI: 10.1007/s10021-011-9411-4 Sites: US-Snd
Large lakes may constitute a significant component of regional surface–atmosphere fluxes, but few efforts have been made to quantify these fluxes. Tracer-transport inverse models that infer the CO2 flux from the atmospheric concentration typically assume that the influence from large lakes is negligible. CO2 …
Journal: Environmental Research Letters, Volume 6 (3): n/a-n/a (2011), ISBN . DOI: 10.1088/1748-9326/6/3/034016 Sites: US-PFa