Articles | Volume 26, issue 22
https://doi.org/10.5194/hess-26-5835-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-26-5835-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Technical note
| 
17 Nov 2022
Technical note |
| 17 Nov 2022
| 17 Nov 2022
Technical note: On uncertainties in plant water isotopic composition following extraction by cryogenic vacuum distillation
Haoyu Diao
Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf 8903, Switzerland
CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
University of Chinese Academy of Sciences, Beijing 100049, China
Philipp Schuler
Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf 8903, Switzerland
Gregory R. Goldsmith
Schmid College of Science and Technology, Chapman University, Orange, CA 92866 USA
Rolf T. W. Siegwolf
Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf 8903, Switzerland
Matthias Saurer
Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf 8903, Switzerland
Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf 8903, Switzerland
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Scott T. Allen, James W. Kirchner, Sabine Braun, Rolf T. W. Siegwolf, and Gregory R. Goldsmith
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Subject: Ecohydrology | Techniques and Approaches: Uncertainty analysis
Technical note: A procedure to clean, decompose, and aggregate time series
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François Ritter
Hydrol. Earth Syst. Sci., 27, 349–361, https://doi.org/10.5194/hess-27-349-2023, https://doi.org/10.5194/hess-27-349-2023, 2023
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This study offers a method to clean
time series– data recorded at specific time intervals (hours, months, etc.). It cuts time series into small pieces (called bins) and rejects bins without enough data. Errors in each bin are then flagged with a popular method called the
box plot rule, which has been improved in this study. Finally, each bin can be averaged to produce a new time series with less noise, fewer gaps, and fewer errors. This procedure can be generalized to any discipline.
Renata Kędzior, Małgorzata Kłonowska-Olejnik, Elżbieta Dumnicka, Agnieszka Woś, Maciej Wyrębek, Leszek Książek, Jerzy Grela, Paweł Madej, and Tomasz Skalski
Hydrol. Earth Syst. Sci., 26, 4109–4124, https://doi.org/10.5194/hess-26-4109-2022, https://doi.org/10.5194/hess-26-4109-2022, 2022
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The river incision significantly increased the values of e-flow calculations in relation to redeposited channels. The area of optimal habitat for macroinvertebrates decreased with the bed incision intensity. In highly incised rivers, the environmental flow values are close to the mean annual flow, suggesting that a high volume of water is needed to obtain good macroinvertebrate conditions. As a consequence, river downcutting processes and impoverishment of optimal habitats will proceed.
William J. Massman
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F. Richter, C. Döring, M. Jansen, O. Panferov, U. Spank, and C. Bernhofer
Hydrol. Earth Syst. Sci., 19, 3457–3474, https://doi.org/10.5194/hess-19-3457-2015, https://doi.org/10.5194/hess-19-3457-2015, 2015
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Predicting hydrological effects of land use change, e.g. enhanced cultivation of short rotation coppices, requires an adequate parameterisation. Measurements and modelling results show that leaf area index, stomatal resistance and in particular start and length of growing season are most sensitive to soil hydrological quantities, like ground water recharge (GWR). Only simulations over 30 years, reflecting long-term climate variability, show even zero GWR, especially in succeeding dry years.
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Hydrol. Earth Syst. Sci., 16, 1465–1480, https://doi.org/10.5194/hess-16-1465-2012, https://doi.org/10.5194/hess-16-1465-2012, 2012
S. Arnold, S. Attinger, K. Frank, and A. Hildebrandt
Hydrol. Earth Syst. Sci., 13, 1789–1807, https://doi.org/10.5194/hess-13-1789-2009, https://doi.org/10.5194/hess-13-1789-2009, 2009
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Short summary
We systematically investigate the uncertainties in previously observed isotopic offsets between plant source water and water extracted by cryogenic vacuum distillation. Our results show that hydrogen isotope exchange between organic material and water is a real phenomenon. However, the isotopic offsets are rather influenced by the actual amount of extracted water, sublimation, and evaporation. Our findings will help improve interpretations of ecohydrological processes in isotope-based studies.
We systematically investigate the uncertainties in previously observed isotopic offsets between...
