Soil respiration (Rs) has been usually measured during daylight hours using manual chambers. This approach assumes that measurements made during a typical time interval (e.g., 9 to 11 am) represent the mean daily value; locally, this may not always be correct and could result in systematic bias of daily and annual Rs budgets. We …
Journal: Scientific Reports, Volume 7 (1): (2017), ISBN . DOI: 10.1038/s41598-017-11849-y Sites: MX-EMg
Journal: Frontiers In Ecology And Evolution, Volume 5: (2017), ISBN . DOI: 10.3389/fevo.2017.00050 Sites: US-RC1, US-RC2, US-RC3, US-RC4
Journal: Journal Of Geophysical Research: Biogeosciences, Volume 122 (12): 3142-3160 (2017), ISBN . DOI: 10.1002/2017JG004148 Sites: US-RC1, US-RC2, US-RC3, US-RC4, US-RC5
While it is reasonable to predict that photosynthetic rates are inhibited while leaves are wet, leaf gas exchange measurements during wet conditions are challenging to obtain due to equipment limitations and the complexity of canopy–atmosphere interactions in forested environments. Thus, the objective of this study was to evaluate …
Journal: Tree Physiology, Volume 37 (10): 1285-1300 (2017), ISBN . DOI: 10.1093/treephys/tpx092 Sites: CR-SoC
Global-scale studies suggest that dryland ecosystems dominate an increasing trend in the magnitude and interannual variability of the land CO2 sink. However, such analyses are poorly constrained by measured CO2 exchange in drylands. Here we address this observation gap with eddy covariance data from 25 sites in the water-limited …
Journal: Global Change Biology, Volume 23 (10): 4204-4221 (2017), ISBN . DOI: 10.1111/gcb.13686 Sites: US-SRG, US-SRM, US-Whs, US-Wkg
Releases of the greenhouse gases carbon dioxide (CO2) and methane (CH4) from thawing permafrost are expected to be among the largest feedbacks to climate from arctic ecosystems. However, the current net carbon (C) balance of terrestrial arctic ecosystems is unknown. Recent studies suggest that these ecosystems are sources, sinks, …
Journal: Ecosystems, Volume 20 (5): 960-974 (2017), ISBN . DOI: http://dx.doi.org/10.1007/s10021-016-0085-9 Sites: US-ICh, US-ICs, US-ICt
The interaction of land with the atmosphere is sensitive to soil moisture (W). Evapotranspiration (ET) reacts to soil moisture in a nonlinear way, f(W), as soils dry from saturation to wilt point. This nonlinear behavior and the fact that soil moisture varies on scales as small as 1–10 m in nature, while numerical general circulation …
Journal: Journal Of Advances In Modeling Earth Systems, Volume 9 (1): 691-711 (2017), ISBN . DOI: http://doi.org/10.1002/2016MS000764 Sites: US-ARM
The seasonal pattern of the carbon isotope content (δ13C) of atmospheric CO2 depends on local and nonlocal land‐atmosphere exchange and atmospheric transport. Previous studies suggested that the δ13C of the net land‐atmosphere CO2 flux (δsource) varies seasonally as stomatal conductance of plants responds to vapor pressure …
Journal: Journal Of Geophysical Research: Biogeosciences, Volume 122 (8): 1969-1987 (2017), ISBN . DOI: https://doi.org/10.1002/2017JG003795 Sites: US-ARM, US-Ha1, US-Ho1, US-NR1, US-Wrc
Journal: Ieee Transactions On Geoscience And Remote Sensing, Volume 55 (11): 6517-6532 (2017), ISBN . DOI: 10.1109/TGRS.2017.2729343 Sites: US-PFa
Journal: Agricultural And Forest Meteorology, Volume 232: 10-22 (2017), ISBN . DOI: 10.1016/j.agrformet.2016.07.019 Sites: US-PFa