PetersFontiFrankEtAl2018

Référence

Peters, R.L., Fonti, P., Frank, D.C., Poyatos, R., Pappas, C., Kahmen, A., Carraro, V., Prendin, A.L., Schneider, L., Baltzer, J.L., Baron-Gafford, G.A., Dietrich, L., Heinrich, I., Minor, R.L., Sonnentag, O., Matheny, A.M., Wightman, M.G. and Steppe, K. (2018) Quantification of uncertainties in conifer sap flow measured with the thermal dissipation method. New Phytologist, 219(4):1283-1299. (Scopus )

Résumé

Trees play a key role in the global hydrological cycle and measurements performed with the thermal dissipation method (TDM) have been crucial in providing whole-tree water-use estimates. Yet, different data processing to calculate whole-tree water use encapsulates uncertainties that have not been systematically assessed. We quantified uncertainties in conifer sap flux density (Fd) and stand water use caused by commonly applied methods for deriving zero-flow conditions, dampening and sensor calibration. Their contribution has been assessed using a stem segment calibration experiment and 4 yr of TDM measurements in Picea abies and Larix decidua growing in contrasting environments. Uncertainties were then projected on TDM data from different conifers across the northern hemisphere. Commonly applied methods mostly underestimated absolute Fd. Lacking a site- and species-specific calibrations reduced our stand water-use measurements by 37% and induced uncertainty in northern hemisphere Fd. Additionally, although the interdaily variability was maintained, disregarding dampening and/or applying zero-flow conditions that ignored night-time water use reduced the correlation between environment and Fd. The presented ensemble of calibration curves and proposed dampening correction, together with the systematic quantification of data-processing uncertainties, provide crucial steps in improving whole-tree water-use estimates across spatial and temporal scales. © 2018 The Authors. New Phytologist © 2018 New Phytologist Trust

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@ARTICLE { PetersFontiFrankEtAl2018,
    AUTHOR = { Peters, R.L. and Fonti, P. and Frank, D.C. and Poyatos, R. and Pappas, C. and Kahmen, A. and Carraro, V. and Prendin, A.L. and Schneider, L. and Baltzer, J.L. and Baron-Gafford, G.A. and Dietrich, L. and Heinrich, I. and Minor, R.L. and Sonnentag, O. and Matheny, A.M. and Wightman, M.G. and Steppe, K. },
    TITLE = { Quantification of uncertainties in conifer sap flow measured with the thermal dissipation method },
    JOURNAL = { New Phytologist },
    YEAR = { 2018 },
    VOLUME = { 219 },
    NUMBER = { 4 },
    PAGES = { 1283-1299 },
    NOTE = { cited By 0 },
    ABSTRACT = { Trees play a key role in the global hydrological cycle and measurements performed with the thermal dissipation method (TDM) have been crucial in providing whole-tree water-use estimates. Yet, different data processing to calculate whole-tree water use encapsulates uncertainties that have not been systematically assessed. We quantified uncertainties in conifer sap flux density (Fd) and stand water use caused by commonly applied methods for deriving zero-flow conditions, dampening and sensor calibration. Their contribution has been assessed using a stem segment calibration experiment and 4 yr of TDM measurements in Picea abies and Larix decidua growing in contrasting environments. Uncertainties were then projected on TDM data from different conifers across the northern hemisphere. Commonly applied methods mostly underestimated absolute Fd. Lacking a site- and species-specific calibrations reduced our stand water-use measurements by 37% and induced uncertainty in northern hemisphere Fd. Additionally, although the interdaily variability was maintained, disregarding dampening and/or applying zero-flow conditions that ignored night-time water use reduced the correlation between environment and Fd. The presented ensemble of calibration curves and proposed dampening correction, together with the systematic quantification of data-processing uncertainties, provide crucial steps in improving whole-tree water-use estimates across spatial and temporal scales. © 2018 The Authors. New Phytologist © 2018 New Phytologist Trust },
    AFFILIATION = { Landscape Dynamics, Swiss Federal Research Institute for Forest, Snow and Landscape Research (WSL), Zürcherstrasse 111, Birmensdorf, Switzerland; Department of Environmental Sciences – Botany, Basel University, Schönbeinstrasse 6, Basel, Switzerland; Laboratory of Tree-Ring Research, 1215 E. Lowell Street, Tucson, AZ, United States; Oeschger Centre for Climate Change Research, Falkenplatz 16, Bern, Switzerland; CREAF, Bellaterra (Cerdanyola del Vallès), Catalonia, Spain; Faculty of Bioscience Engineering, Department of Plants and Crops, Laboratory of Plant Ecology, Ghent University, Coupure links 653, Ghent, Belgium; Département de géographie and Centre d’études nordiques, Université de Montréal, Montréal, QC, Canada; Department TeSAF Territorio e Sistemi Agro-Forestali, Università degli Studi di Padova, Viale dell'Università 16, Legnaro, PD, Italy; Department of Bioscience, Ecoinformatic & Biodiversity, Aarhus University, Ny Munkegade 116, Building 1540, Aarhus C, Denmark; Biology Department, Wilfrid Laurier University, 75 University Ave. W, Waterloo, ON, Canada; School of Geography and Development, University of Arizona, 1064 E Lowell St, Tucson, AZ, United States; Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Climate Dynamics and Landscape Evolution, Telegrafenberg, Potsdam, Germany; Department of Geological Sciences, Jackson School of Geosciences, 2305 Speedway Stop, Austin, TX, United States; College of Forestry, Oregon State University, 1500 SW Jefferson St, Corvallis, OR, United States },
    AUTHOR_KEYWORDS = { calibration; night-time transpiration; sap flux density; thermal dissipation probes; transpiration; uncertainty analysis; wounding effects },
    DOCUMENT_TYPE = { Article },
    DOI = { 10.1111/nph.15241 },
    SOURCE = { Scopus },
    URL = { https://www.scopus.com/inward/record.uri?eid=2-s2.0-85051114507&doi=10.1111%2fnph.15241&partnerID=40&md5=540a4c1dc1fa1bfe79406caf7bc42bf9 },
}

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