Journal: Global Change Biology, Volume 20 (4): 1161-1173 (2014). DOI: doi:10.1111/gcb.12434 Sites: US-Uaf
Journal: J. Forest Res., Volume 20: 52-59 (2014). DOI: Sites: US-Prr, US-Uaf
Quantifying impacts of ecological disturbance on ecosystem carbon and water fluxes will improve predictive understanding of biosphere—atmosphere feedbacks. Tree mortality caused by mountain pine bark beetles (Dendroctonus ponderosae) is hypothesized to decrease photosynthesis and water flux to the atmosphere while increasing respiration …
Journal: Environmental Research Letters, Volume 9 (10): 105004 (2014). DOI: 10.1088/1748-9326/9/10/105004 Sites: US-CPk
Journal: Atmospheric Environment, Volume 84: 314-322 (2014). DOI: 10.1016/j.atmosenv.2013.11.055 Sites: US-MOz
We investigated relationships between tree-ring δ13C and growth, and flux tower estimates of gross primary productivity (GPP) at Harvard Forest from 1992 to 2010. Seasonal variations of derived photosynthetic isotope discrimination (Δ13C) and leaf intercellular CO2 concentration (c i ) showed significant increasing trends for the …
Journal: Environmental Research Letters, Volume 9 (7): 074011 (2014). DOI: 10.1088/1748-9326/9/7/074011 Sites: US-Ha1
Automated measurements of the net forestfloor
CO2 exchange (NFFE) were made in a mature (130yearold)
boreal black spruce forest over an 8year
period (2002–2009) with the objectives of (1) quantifying
the spatial and temporal (seasonal and interannual) patterns in NFFE, soil respiration (SR) and gross forestfloor
photosynthesis …
Journal: Agricultural And Forest Meteorology, Volume 184: 25-35 (2014). DOI: 10.1016/j.agrformet.2013.08.010 Sites: CA-Obs
Soil CO2 efflux is the primary source of CO2 emissions from terrestrial ecosystems to the atmosphere. The rates of this flux vary in time and space producing hot moments (sudden temporal high fluxes) and hot spots (spatially defined high fluxes), but these high reaction rates are rarely studied in conjunction with each other. We …
Journal: Soil Biology And Biochemistry, Volume 77: 12-21 (2014). DOI: 10.1016/j.soilbio.2014.05.029 Sites: MX-EMg
Journal: Biogeosciences, Volume 11 (15): 4139-4156 (2014). DOI: 10.5194/bg-11-4139-2014 Sites: US-Me6
Journal: Biogeosciences, Volume 11 (15): 4139-4156 (2014). DOI: 10.5194/bg-11-4139-2014 Sites: US-Me6
Snowpack temperatures from a subalpine forest below Niwot Ridge, Colorado, are examined with respect to atmospheric conditions and the 30-min above-canopy and subcanopy eddy covariance fluxes of sensible Qh and latent Qe heat. In the lower snowpack, daily snow temperature changes greater than 1°C day−1 occurred about 1–2 times …
Journal: Journal Of Hydrometeorology, Volume 15 (1): 117-142 (2014). DOI: 10.1175/JHM-D-13-026.1 Sites: US-NR1