Research Highlights


  • Contributors: John M. Baker
  • Title: Multi-scale analyses reveal robust relations between solar induced fluorescence and gross primary production
  • Abstract Solar-induced fluorescence (SIF) has shown great promise for probing spatiotemporal variations in terrestrial gross primary production (GPP), the largest component flux of the global carbon cycle. However, scale mismatches between SIF and g (read full)
  • Published in: Geophy. Res. Letters, 2017

  • Contributors: Dennis Baldocchi
  • Title: Photosynthetic responses to temperature across leaf–canopy–ecosystem scales: a 15-year study in a Californian oak-grass savanna
  • Ecosystem CO2 fluxes measured with eddy-covariance techniques provide a new opportunity to retest functional responses of photosynthesis to abiotic factors at the ecosystem level, but examining the effects of one factor (e.g., temperature) on photosy (read full)
  • Published in: . Photosynthesis research, 2017

  • Contributors: Ashley Matheny, Gil Bohrer
  • Title: Contrasting strategies of hydraulic control in two co-dominant temperate tree species
  • Biophysical controls on plant water status exist at the leaf, stem, and root levels. Therefore, we pose that hydraulic strategy is a combination of traits governing water use at each of these three levels. We studied sap flux, stem water storage, sto (read full)
  • Published in: Ecohydrology, 2017/04

  • Contributors: Joel Biederman
  • Title: CO2 exchange and evapotranspiration across dryland ecosystems of southwestern North America
  • 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 (read full)
  • Published in: Global Change Biology, 2017

  • 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