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Global transpiration data from sap flow measurements: the SAPFLUXNET database

Formally Refereed
Authors: Rafael Poyatos, Victor Granda, Victor Flo, Mark A. Adams, Balazs Adorjan, David Aguade, Marcos P. M. Aidar, Scott Allen, M. Susana Alvarado-Barrientos, Kristina J. Anderson-Teixeira, Luiza Maria Aparecido, M. Altaf Arain, ismael Aranda, Heidi Asbjornsen, Robert Baxter, Eric Beamesderfer, Z. Carter Berry, Daniel Berveiller, Bethany Blakely, Johnny Boggs, Gil Bohrer, Paul V Bolstad, Damien Bonal, Rosvel Bracho, Patricia Brito, Jason Brodeur, Fernando Casanoves, Jerome Chave, Hui Chen, Cesar Cisneros, Kenneth Clark, Edoardo Cremonese, Hongzhong Dang, Jorge S. David, Teresa S. David, Nicolas Delpierre, Ankur R. Desai, Frederic C. Do, Michal Dohnal, Jean-Christophe Domec, Sebinasi Dzikiti, Colin Edgar, Rebekka Eichstaedt, Tarek S. El-Madany, Jan Elbers, Cleiton B. Eller, Eugenie S. Euskirchen, Brent Ewers, Patrick Fonti, Alicia Forner, et al., A. Christopher Oishi, al. et, Ge Sun, al et.
Year: 2021
Type: Scientific Journal
Station: Southern Research Station
Source: Earth System Science Data


Plant transpiration links physiological responses of vegetation to water supply and demand with hydrological, energy, and carbon budgets at the land-atmosphere interface. However, despite being the main land evaporative flux at the global scale, transpiration and its response to environmental drivers are currently not well constrained by observations. Here we introduce the first global compilation of whole-plant transpiration data from sap flow measurements (SAPFLUXNET,, last access: 8 June 2021). We harmonized and quality-controlled individual datasets supplied by contributors worldwide in a semi-automatic data workflow implemented in the R programming language. Datasets include sub-daily time series of sap flow and hydrometeorological drivers for one or more growing seasons, as well as metadata on the stand characteristics, plant attributes, and technical details of the measurements. SAPFLUXNET contains 202 globally distributed datasets with sap flow time series for 2714 plants, mostly trees, of 174 species. SAPFLUXNET has a broad bioclimatic coverage, with woodland/shrubland and temperate forest biomes especially well represented (80 % of the datasets). The measurements cover a wide variety of stand structural characteristics and plant sizes. The datasets encompass the period between 1995 and 2018, with 50 % of the datasets being at least 3 years long. Accompanying radiation and vapour pressure deficit data are available for most of the datasets, while on-site soil water content is available for 56 % of the datasets. Many datasets contain data for species that make up 90 % or more of the total stand basal area, allowing the estimation of stand transpiration in diverse ecological settings. SAPFLUXNET adds to existing plant trait datasets, ecosystem flux networks, and remote sensing products to help increase our understanding of plant water use, plant responses to drought, and ecohydrological processes. SAPFLUXNET version 0.1.5 is freely available from the Zenodo repository (; Poyatos et al., 2020a). The "sapfluxnetr" R package - designed to access, visualize, and process SAPFLUXNET data - is available from CRAN.


Sapflow, Evapotranspiration, Water Resources


Poyatos, Rafael; Granda, Victor; Flo, Victor; Adams, Mark A.; Adorjan, Balazs; Aguade, David; Aidar, Marcos P. M.; Allen, Scott; Alvarado-Barrientos, M. Susana; Anderson-Teixeira, Kristina J.; Aparecido, Luiza Maria; Arain, M. Altaf; Aranda, ismael; Asbjornsen, Heidi; Baxter, Robert; Beamesderfer, Eric; Berry, Z. Carter; Berveiller, Daniel; Blakely, Bethany; Boggs, Johnny; Bohrer, Gil; Bolstad, Paul V.; Bonal, Damien; Bracho, Rosvel; Brito, Patricia; Brodeur, Jason; Casanoves, Fernando; Chave, Jerome; Chen, Hui; Cisneros, Cesar; Clark, Kenneth; Cremonese, Edoardo; Dang, Hongzhong; David, Jorge S.; David, Teresa S.; Delpierre, Nicolas; Desai, Ankur R.; Do, Frederic C.; Dohnal, Michal; Domec, Jean-Christophe; Dzikiti, Sebinasi; Edgar, Colin; Eichstaedt, Rebekka; El-Madany, Tarek S.; Elbers, Jan; Eller, Cleiton B.; Euskirchen, Eugenie S.; Ewers, Brent; Fonti, Patrick; Forner, Alicia; et al.; Sun, Ge.; et al. 2021. Global transpiration data from sap flow measurements: the SAPFLUXNET database. Earth System Science Data. 13(6): 2607-2649.