Alexandre, Anne (2025): Plant water isotopes from West Africa (Benin and Senegal) [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.986639 (DOI registration in progress), In: Alexandre, A (2025): Climate and triple oxygen isotope of precipitation, groundwater, soil water, plant water, and phytolith data from West Africa (Benin and Senegal) [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.984133
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Published: 2025-11-24
Abstract:
Observed and predicted triple oxygen isotope composition of water extracted from leaf, stem and wood samples collected at Belefoungou (BE, Benin), Nalohou (NA, Benin) and Dahra (DA, Senegal) at midday (12 to 14 H UTC). Water was analyzed by Isotope Ratio Mass Spectrometry (IRMS) after cryogenic distillation. Relative humidity, air temperature, and triple oxygen isotope composition of precipitation preceding the sampling are considered in the Craig and Gordon (Craig and Gordon, 1965) evaporation model + mixing equation (Cernuzak et al., 2016; Alexandre et al., 2018; 2019 and Outrequin et al., 2021).
Related to:
Alexandre, Anne; Outrequin, Clément; Vallet-Coulomb, Christine; Peugeot, Christophe; Grippa, Manuela; Aleman, Julie C; Voigt, Claudia; Landais, Amaëlle; Mougin, Eric; Ndiaye, Ousmane; Sonzogni, Corinne; Yang, David Au; Mazur, Jean-Charles; Couapel, Martine; Ogée, Jérôme; Ouani, Theodore; Afouda, Simon; Wubda, Maxime; Soumaguel, Nogmana; Houngnon, Alfred; Tagesson, Torbern; Fensholt, Rasmus (2025): What Does the Triple Isotopic Composition of Oxygen in Precipitation, Groundwater, Soil Water, Plant Water, and Phytoliths Reveal About Current and Past Hydrological Cycles? Journal of Geophysical Research: Biogeosciences, 130(10), e2024JG008615, https://doi.org/10.1029/2024JG008615
References:
Alexandre, Anne; Landais, Amaëlle; Vallet-Coulomb, Christine; Piel, Clément; Devidal, Sébastien; Pauchet, Sandrine; Sonzogni, Corinne; Couapel, Martine; Pasturel, Marine; Cornuault, Pauline; Xin, Jingming; Mazur, Jean-Charles; Prié, Frédéric; Bentaleb, Ilhem; Webb, Elizabeth; Chalié, Françoise; Roy, Jacques (2018): The triple oxygen isotope composition of phytoliths as a proxy of continental atmospheric humidity: insights from climate chamber and climate transect calibrations. Biogeosciences, 15(10), 3223-3241, https://doi.org/10.5194/bg-15-3223-2018
Alexandre, Anne; Webb, Elizabeth; Landais, Amaëlle; Piel, Clément; Devidal, Sébastien; Sonzogni, Corinne; Couapel, Martine; Mazur, Jean-Charles; Pierre, Monique; Prié, Frédéric; Vallet-Coulomb, Christine; Outrequin, Clément; Roy, Jacques (2019): Effects of leaf length and development stage on the triple oxygen isotope signature of grass leaf water and phytoliths: insights for a proxy of continental atmospheric humidity. Biogeosciences, 16(23), 4613-4625, https://doi.org/10.5194/bg-16-4613-2019
Cernusak, Lucas A; Barbour, Margaret M; Arndt, Stefan K; Cheesman, Alexander W; English, Nathan B; Feild, Taylor S; Helliker, Brent R; Holloway‐Phillips, Meisha M; Holtum, Joseph A M; Kahmen, Ansgar; McInerney, Francesca A; Munksgaard, Niels C; Simonin, Kevin A; Song, Xin; Stuart‐Williams, Hilary; West, Jason B; Farquhar, Graham D (2016): Stable isotopes in leaf water of terrestrial plants. Plant Cell and Environment, 39(5), 1087-1102, https://doi.org/10.1111/pce.12703
Craig, Harmon C; Gordon, Louis I (1965): Deuterium and oxygen 18 variations in the ocean and the marine atmosphere. In: Stable Isotopes in Oceanographic Studies and Paleotemperatures, edited by E. Tongiorgi, Cons. Naz. di Rech., Spoleto, Italy, 9-130
Outrequin, Clément; Alexandre, Anne; Vallet-Coulomb, Christine; Piel, Clément; Devidal, Sébastien; Landais, Amaëlle; Couapel, Martine; Mazur, Jean-Charles; Peugeot, Christophe; Pierre, Monique; Prié, Frédéric; Roy, Jacques; Sonzogni, Corinne; Voigt, Claudia (2021): The triple oxygen isotope composition of phytoliths, a new proxy of atmospheric relative humidity: controls of soil water isotope composition, temperature, CO 2 concentration and relative humidity. Climate of the Past, 17(5), 1881-1902, https://doi.org/10.5194/cp-17-1881-2021
Funding:
Agence Nationale de la Recherche (ANR), grant/award no. ANR-17-CE01-0002: Past dynamic of continental atmospheric humidity and vegetation: new insights from the triple isotopic composition of oxygen (HUMI-17)
Coverage:
Median Latitude: 11.624000 * Median Longitude: -4.060667 * South-bound Latitude: 9.733000 * West-bound Longitude: -15.482000 * North-bound Latitude: 15.356000 * East-bound Longitude: 1.700000
Date/Time Start: 2018-04-04T00:00:00 * Date/Time End: 2028-12-08T00:00:00
Event(s):
Bellefoungou_met * Latitude: 9.733000 * Longitude: 1.600000 * Location: Bellefoungou, Benin * Method/Device: Meteorological station * Comment: AMMA-CATCH Meteorological station
Comment:
Soils and plants were collected in 4m2 fenced sampling plots a few meters from the meteorological stations
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Alexandre, Anne | |||
| 2 | Location | Location | Alexandre, Anne | |||
| 3 | Vegetation type | Vegetation type | Alexandre, Anne | |||
| 4 | Sample code/label | Sample label | Alexandre, Anne | The label indicates the sampling site (e.g. BE) and sampling date with ddmmyy (e.g. 040418) | ||
| 5 | DATE/TIME | Date/Time | Alexandre, Anne | Geocode – Date | ||
| 6 | Comment | Comment | Alexandre, Anne | when no date defined | ||
| 7 | Type | Type | Alexandre, Anne | Sample type | ||
| 8 | Species | Species | Alexandre, Anne | |||
| 9 | Comment | Comment | Alexandre, Anne | Growing vs senescent | ||
| 10 | Vegetation height | Veg h | cm | Alexandre, Anne | ||
| 11 | Humidity, relative, daytime mean | RH daytime m | % | Alexandre, Anne | ||
| 12 | Temperature, air, daytime mean | TTT daytime m | °C | Alexandre, Anne | ||
| 13 | δ'18O, precipitation | δ'18O precip | ‰ SMOW | Alexandre, Anne | precipitation event preceding sampling, vs VSMOW | |
| 14 | δ'17O, precipitation | δ'17O precip | ‰ SMOW | Alexandre, Anne | precipitation event preceding sampling, vs VSMOW | |
| 15 | Oxygen-17 excess, precipitation | 17O xs precip | per meg | Alexandre, Anne | precipitation event preceding sampling | |
| 16 | Conductance, stomatal | Conductance stoma | mol/m2/s | Alexandre, Anne | ||
| 17 | Conductance, boundary layer | Conductance BL | mol/m2/s | Alexandre, Anne | ||
| 18 | Oxygen-18/Oxygen-16 equilibrium fractionation factor, expressed as 1000 ln 18-alpha | 1000 ln 18-alpha | ‰ | Alexandre, Anne | 1000LN18awater-vapor | |
| 19 | Oxygen-17/Oxygen-16 equilibrium fractionation factor, expressed as 1000 ln 17-alpha | 1000 ln 17-alpha | ‰ | Alexandre, Anne | 1000LN17awater-vapor | |
| 20 | Vapour pressure, air | Vapour press air | kPa | Alexandre, Anne | ||
| 21 | Vapour pressure, leaf | Vapour press leaf | kPa | Alexandre, Anne | using leaf temperature - air temperature = -2 °C (kPa) | |
| 22 | Ratio, vapour pressure | Ratio vapour press | Alexandre, Anne | Water vapor mole fraction in the air vs in the intercellular spaces iside leaves wa/wi | ||
| 23 | Isotopic fractionation, kinetic | alpha_k | ‰ | Alexandre, Anne | for d18O | |
| 24 | Isotopic fractionation, kinetic | alpha_k | ‰ | Alexandre, Anne | for d17O | |
| 25 | Isotopic fractionation, equilibrium | alpha_equil | ‰ | Alexandre, Anne | for d18O at leaf temp | |
| 26 | Isotopic fractionation, equilibrium | alpha_equil | ‰ | Alexandre, Anne | for d17O at leaf temp | |
| 27 | Δδ18O | Δδ18O | ‰ | Alexandre, Anne | Enrichment: D18O | |
| 28 | Δδ17O | Δδ17O | ‰ | Alexandre, Anne | Enrichment: D17O | |
| 29 | Contribution, fraction | Cont frac | Alexandre, Anne | Contribution of unevaporated water | ||
| 30 | δ'18O, plant water | δ'18O plant water | ‰ SMOW | Alexandre, Anne | Predicted | |
| 31 | δ'17O, plant water | δ'17O plant water | ‰ SMOW | Alexandre, Anne | Predicted | |
| 32 | Oxygen-17 excess, plant water | 17O xs plant water | per meg | Alexandre, Anne | Predicted | |
| 33 | δ'18O, plant water | δ'18O plant water | ‰ SMOW | Alexandre, Anne | Observed | |
| 34 | δ'17O, plant water | δ'17O plant water | ‰ SMOW | Alexandre, Anne | Observed | |
| 35 | Oxygen-17 excess, plant water | 17O xs plant water | per meg | Alexandre, Anne | Observed | |
| 36 | Isotopic fractionation | lambda | Alexandre, Anne | (d'^17O_predicted leaf water -d'^17O_precipitation ) / (d'^17O_predicted leaf water -d'^17O_precipitation ) | ||
| 37 | Isotopic fractionation | lambda | Alexandre, Anne | (d'^17O_observed leaf water -d'^17O_precipitation ) / (d'^17O_observed leaf water -d'^17O_precipitation ) | ||
| 38 | Isotopic fractionation | lambda | Alexandre, Anne | (d'^17O_observed stem water -d'^17O_precipitation ) / (d'^17O_observed stem water -d'^17O_precipitation ) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
916 data points