K. Billmark
University of Minnesota
9 Papers
7 Citations
K. Billmark is an academic researcher from University of Minnesota. The author has contributed to research in topics: Eddy covariance & Evapotranspiration. The author has an hindex of 7, co-authored 9 publications.
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Papers
δ18O of water vapour, evapotranspiration and the sites of leaf water evaporation in a soybean canopy
Lisa R. Welp,Xuhui Lee,Kyounghee Kim,Timothy J. Griffis,K. Billmark,John M. Baker,John M. Baker +6 more
TL;DR: High-frequency measurements of oxygen isotopic compositions of water vapour and evapotranspiration above a soybean canopy using the tunable diode laser (TDL) technique for the entire 2006 growing season in Minnesota, USA find that vertical variability in relative humidity and temperature associated with canopy structure must be addressed in canopy-scale leaf water models.
Oxygen isotope composition of evapotranspiration and its relation to C4 photosynthetic discrimination
Timothy J. Griffis,Xuhui Lee,John M. Baker,K. Billmark,Natalie M. Schultz,M. Erickson,Xin Zhang,Joel J. Fassbinder,Wei Xiao,Ning Hu +9 more
TL;DR: In this article, simultaneous observations of 18O-H2O (liquid and vapor phases) and CO2 were used to investigate the relation between canopy leaf water 18O enrichment, 18O CO2 photosynthetic discrimination (18Δ), isotope disequilibrium (Deq), and the biophysical factors that control their temporal variability in a C4 (Zea mays L.) ecosystem.
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Oxygen Isotope Composition of Evapotranspiration and its Relation to C4 Photosynthetic Discrimination
Timothy J. Griffis,Xuhui Lee,Steven D. Sargent,John M. Baker,K. Billmark,Natalie M. Schultz,M. Erickson,Xin Zhang,Joel J. Fassbinder,Wei Xiao,Ning Hu +10 more
- 01 Dec 2009
TL;DR: In this article, simultaneous observations of 18O-H2O (liquid and vapor phases) and CO2 were used to investigate the relation between canopy leaf water 18O enrichment, 18O CO2 photosynthetic discrimination (18Δ), isotope disequilibrium (Deq), and the biophysical factors that control their temporal variability in a C4 (Zea mays L.) ecosystem.
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Influence of Phenology and Land Management on Biosphere-Atmosphere Isotopic CO2 Exchange
K. Billmark,Timothy J. Griffis +1 more
- 01 Jan 2009
TL;DR: In this article, the authors examined the key processes influencing biosphere-atmosphere 13CO2 exchange from the perspective of agricultural land management and rapid seasonal changes in phenology, and showed that the isotopic composition of respiration at the ecosystem scale is strongly linked to plant assimilated carbon, which is dependent on plant metabolic physiology and growth phase.
7
Determining the Oxygen Isotope Composition of Evapotranspiration Using Eddy Covariance
Timothy J. Griffis,Steven D. Sargent,Xuhui Lee,John M. Baker,J. Greene,M. Erickson,Xin Zhang,K. Billmark,Natalie M. Schultz,Wei Xiao,Ning Hu +10 more
TL;DR: In this paper, the eddy-covariance and tunable diode laser spectroscopy (EC-TDL) techniques were used to measure the oxygen isotope composition of evapotranspiration.