Research Highlights


  • Contributors: Sonia Wharton
  • Title: Influence of regional nighttime atmospheric regimes on canopy turbulence and gradients at a closed and open forest in mountain-valley terrain
  • Stable stratification of the nocturnal lower boundary layer inhibits convective turbulence, such that tur-bulent vertical transfer of ecosystem carbon dioxide (CO2), water vapor (H2O) and energy is driven bymechanically forced turbulence, either from (read full)
  • Published in: Agricultural and Forest Meteorology, 2017/02

  • Contributors: Dennis Baldocchi
  • Title: Revisiting the partitioning of net ecosystem exchange of CO2 into photosynthesis and respiration with simultaneous flux measurements of 13CO2 and CO2, soil respiration and a biophysical model, CANVEG.
  • tThe partitioning of net ecosystem exchange of CO2(NEE) into photosynthesis and respiration can be chal-lenging and is often associated with assumptions that yield unknown amounts of uncertainty, therebyhindering model development. This occurs becaus (read full)
  • Published in: Agricultural and Forest Meteorology, 2017

  • Contributors: Asko Noormets
  • Title: A remotely sensed pigment index reveals photosynthetic phenology in evergreen conifers
  • In evergreen conifers, where the foliage amount changes little with season, accurate detection of the underlying “photosynthetic phenology” from satellite remote sensing has been difficult, presenting challenges for global models of ecosystem car (read full)
  • Published in: Proceedings of the National Academy of Sciences of the United States of America, Published online before print November 1, 2016

  • Contributors: Sebastian Wolf
  • Title: Short-term favorable weather conditions are an important control of interannual variability in carbon and water fluxes
  • Ecosystem models often perform poorly in reproducing interannual variability in carbon and water fluxes, resulting in considerable uncertainty when estimating the land-carbon sink. While many aggregated variables (growing season length, seasonal prec (read full)
  • Published in: Journal of Geophysical Research - Biogeosciences, 2016

  • Contributors: Sebastian Wolf
  • Title: Warm spring reduced carbon cycle impact of the 2012 US summer drought
  • The global terrestrial carbon sink offsets one-third of the world’s fossil fuel emissions, but the strength of this sink is highly sensitive to large-scale extreme events. In 2012, the contiguous United States experienced exceptionally warm tempera (read full)
  • Published in: Proceedings of the National Academy of Sciences, 2016

  • Contributors: Ankur Desai
  • Title: Upscaling tower-observed turbulent exchange at fine spatio-temporal resolution using environmental response functions
  • Eddy-covariance measurements are widely used to develop and test parameterizations of land- atmosphere interactions in earth system models. However, a fundamental challenge for model-data comparisons lies in the scale mismatch between the eddy-covari (read full)
  • Published in: Agricultural and Forest Meteorology, 2016/08

  • Contributors: Gil Bohrer
  • Title: Tree level hydrodynamic approach for resolving aboveground water storage and stomatal conductance and modeling the effects of tree hydraulic strategy
  • The Finite-Element Tree-Crown Hydrodynamics model version 2 (FETCH2) is a tree-scale hydrodynamic model of transpiration. The FETCH2 model employs a finite difference numerical methodology and a simplified single-beam conduit system. It explicitly re (read full)
  • Published in: Journal of Geophysical Research-Biogeosciences, 2016

  • Contributors: Dennis Baldocchi
  • Title: Slow ecosystem responses conditionally regulate annual carbon balance over 15 years in Californian oak-grass savanna
  • Many ecophysiological and biogeochemical processes respond rapidly to changes in biotic and abiotic conditions, while ecosystem-level responses develop much more slowly (e.g., over months, seasons, years, or decades). To better understand the role of (read full)
  • Published in: Agricultural and Forest Meteorology,

  • Contributors: Christopher Gough
  • Title: INNOVATIVE VIEWPOINT: Disturbance, complexity, and succession of net ecosystem production in North America’s temperate deciduous forests
  • Century-old forests in the US upper Midwest and Northeast power much of North America’s terrestrial carbon (C) sink, but these forests’ production and C sequestration capacity are expected to soon decline as fast-growing early successional specie (read full)
  • Published in: Ecosphere, 2016

  • Contributors: Christopher Gough
  • Title: Coarse woody debris and the carbon balance of a moderately disturbed forest
  • Forested landscapes are shaped by disturbances varying in severity and source. Moderate disturbance from weather, pathogens, insects, and age-related senescence that kills only a subset of canopy trees may increase standing woody debris and alter the (read full)
  • Published in: Forest Ecology and Management, 2016