Fernández-Pérez Uxía 0000-0003-1022-7148 Universidade da Coruña https://ror.org/01qckj285 Santos Ricardo N r.n.santos@unibas.ch 0000-0002-8252-3619 University of Basel https://www.unibas.ch/de https://ror.org/02s6k3f65 Rodrigues Teresa teresa.rodrigues@ipma.pt 0000-0001-7811-7506 Universidade do Algarve UAlg http://www.ualg.pt https://ror.org/014g34x36 Schefuß Enno eschefuss@marum.de 0000-0002-5960-930X MARUM - Center for Marine Environmental Sciences, University Bremen MARUM http://www.marum.de/ https://ror.org/04ers2y35 Bao Roberto roberto.bao@udc.es 0000-0002-2928-2836 Universidade da Coruña https://ror.org/01qckj285 Raposeiro Pedro Miguel pedro.mv.raposeiro@uac.p 0000-0002-7461-0851 University of the Azores UAc https://ror.org/04276xd64 Sáez Alberto a.saez@ub.edu Universitat de Barcelona UB https://web.ub.edu https://ror.org/021018s57 Giralt Santiago sgiralt@geo3bcn.csic.es 0000-0001-8570-7838 Geociencias Barcelona GEO3BCN – CSIC https://ror.org/01nsd7y51 Martín-Puertas Celia celia.martinpuertas@rhul.ac.uk 0000-0002-1349-5669 University of Granada http://www.ugr.es/ https://ror.org/04njjy449 Francus Pierre pierre.francus@inrs.ca 0000-0001-5465-1966 National Institute of Scientific Research, Centre Eau Terre Environnement, Institut National de la Recherche Scientifique https://ror.org/04td37d32 Trigo Ricardo M rmtrigo@fc.ul.pt 0000-0002-4183-9852 Universidade de Lisboa https://ror.org/01c27hj86 Ramos Alexandre M 0000-0003-3129-7233 Karlsruhe Institute of Technology KIT https://ror.org/04t3en479 Hernández Armand armand.hernandez@udc.es 0000-0001-7245-9863 Universidade da Coruña https://ror.org/01qckj285 2026 Holocene hydrogen isotope composition of precipitation (δ²H) reconstructed from sedimentary leaf wax n-alkanes in Lake Peixão, Serra da Estrela, Portugal dataset https://doi.org/10.1594/PANGAEA.995820 2026-09-02T08:13:48 This dataset provides a Holocene record of the hydrogen isotope composition of precipitation (δ²H precip) reconstructed from hydrogen isotopes measured in sedimentary leaf wax n-alkanes extracted from lacustrine sediment core PEX19-01, retrieved from Lake Peixão (40°20'35 N, 7°36'19 W), a small alpine lake located at 1677 meters above sea level in Serra da Estrela Montain, Portugal. Sediment cores were retrieved in June 2019 using a UWITEC piston coring system (Hernández et al., 2023). We adopt the age-depth model published by Hernández et al. (2023), which indicates continuous sedimentation over the past ~11.100 years. We present compound-specific hydrogen isotope ratios (δ²Hwax) of the terrestrial leaf wax endmember extracted by non-negative matrix factorization (NMF) of sedimentary n-alkane distributions, measured by gas chromatography–isotope ratio mass spectrometry (GC-IRMS). The NMF decomposition isolates the terrestrial vascular plant signal from other sources (e.g., aquatic, degraded organic matter), following Polissar et al. (2025). Precipitation isotope values (δ²H precip) were then derived by applying a catchment-integrated apparent fractionation factor (εapp = −129 ± 12‰; Santos et al., 2022, 2024), which accounts for the isotopic offset between leaf wax and source water. Uncertainty bounds reflect the propagated error on εapp (±12‰). Anomaly values (Δδ²H) represent the deviation of reconstructed δ²H precip from the modern mean annual precipitation isotope value at the site (δ²H MAP = −56‰), estimated using the Online Isotopes in Precipitation Calculator (OIPC). The dataset was generated to reconstruct past changes in hydroclimate and atmospheric circulation over the NW Iberian Peninsula during the Holocene, with the aim of characterizing the evolution of the Atlantic–Mediterranean climate boundary at centennial to millennial timescales. Hernández Armand armand.hernandez@udc.es 0000-0001-7245-9863 Sáez Alberto a.saez@ub.edu Santos Ricardo N r.n.santos@unibas.ch 0000-0002-8252-3619 Rodrigues Teresa teresa.rodrigues@ipma.pt 0000-0001-7811-7506 Martín-Puertas Celia celia.martinpuertas@rhul.ac.uk 0000-0002-1349-5669 Gil-Romera Graciela 0000-0001-5726-2536 Abbott Mark mark@oce.orst.edu Carballeira Rafael Costa Pedro J M 0000-0001-6573-0539 Giralt Santiago sgiralt@geo3bcn.csic.es 0000-0001-8570-7838 Gomes Sandra D 0000-0001-7807-3144 Griffore Melissa Ibañez-Insa Jordi Leira M 0000-0001-9024-9448 Moreno João jcmoreno@fc.ul.pt 0000-0003-4611-8648 Naughton Filipa filipa.naughton@ipma.pt 0000-0002-3055-9396 Oliveira Dulce dulce_oliveiraa@hotmail.com 0000-0002-3016-532X Raposeiro Pedro Miguel pedro.mv.raposeiro@uac.p 0000-0002-7461-0851 Trigo Ricardo M rmtrigo@fc.ul.pt 0000-0002-4183-9852 Vieira Gonçalo vieira@campus.ul.pt 0000-0001-7611-3464 Ramos Alexandre M 0000-0003-3129-7233 2023 The timing of the deglaciation in the Atlantic Iberian mountains: Insights from the stratigraphic analysis of a lake sequence in Serra da Estrela (Portugal) journal article Earth Surface Processes and Landforms https://doi.org/10.1002/esp.5536 esp.5536 Polissar Pratigya J 0000-0001-5483-1625 Karp A Tyler 0000-0001-9764-749X D'Andrea William J dandrea@ldeo.columbia.edu 0000-0003-0182-8857 2025 Mixed messages: Unmixing sedimentary molecular distributions reveals source contributions and isotopic values journal article Geochimica et Cosmochimica Acta 396 https://doi.org/10.1016/j.gca.2025.03.001 122-134 Santos Ricardo N r.n.santos@unibas.ch 0000-0002-8252-3619 Rodrigues Teresa teresa.rodrigues@ipma.pt 0000-0001-7811-7506 Naughton Filipa filipa.naughton@ipma.pt 0000-0002-3055-9396 Schefuß Enno eschefuss@marum.de 0000-0002-5960-930X Oliveira Dulce dulce_oliveiraa@hotmail.com 0000-0002-3016-532X Moreno João jcmoreno@fc.ul.pt 0000-0003-4611-8648 Raposeiro Pedro Miguel pedro.mv.raposeiro@uac.p 0000-0002-7461-0851 Gil-Romera Graciela 0000-0001-5726-2536 Morgan Alistair Leira M 0000-0001-9024-9448 Gomes Sandra D 0000-0001-7807-3144 Ladd S N 0000-0002-0132-5785 Trigo Ricardo M rmtrigo@fc.ul.pt 0000-0002-4183-9852 Ramos Alexandre M 0000-0003-3129-7233 Hernández Armand armand.hernandez@udc.es 0000-0001-7245-9863 2024 Understanding the Atlantic influence on climate and vegetation dynamics in western Iberia over the last 2000 years journal article Quaternary Science Reviews 337 https://doi.org/10.1016/j.quascirev.2024.108796 108796 Santos Ricardo N r.n.santos@unibas.ch 0000-0002-8252-3619 Schefuß Enno eschefuss@marum.de 0000-0002-5960-930X Cordeiro Lívia Gebara M S Oliveira Dulce dulce_oliveiraa@hotmail.com 0000-0002-3016-532X Hernández Armand armand.hernandez@udc.es 0000-0001-7245-9863 Ramos Alexandre M 0000-0003-3129-7233 Rodrigues Teresa teresa.rodrigues@ipma.pt 0000-0001-7811-7506 2022 Leaf wax biomarkers of a high-mountain lake area in western iberia—Implications for environmental reconstructions journal article Frontiers in Environmental Science 10 https://doi.org/10.3389/fenvs.2022.994377 994377 -7.605371 -7.605371 40.343044 40.343044 -7.605371 40.343044 2019-06-10T00:00:00 2019-06-10T00:00:00 1677.0 1677.0 European Multidisciplinary Seafloor and water column Observatory EMSO-ERIC https://ror.org/04xkqms46 PINFRA/22157/2016-EMSO-PT Fundação para a Ciência e Tecnologia FCT https://www.fct.pt/en/# https://doi.org/10.13039/501100001871 PTDC/CTA‐GEO/29029/2017 HOLMODRIVE https://holmodrive.rd.ciencias.ulisboa.pt/index.html Fundação para a Ciência e Tecnologia FCT https://www.fct.pt/en/# https://doi.org/10.13039/501100001871 UIDB/04326/2020 Centro de Ciências do Mar (CCMAR) PEX19-01 40.343044 -7.605371 1677.0 2019-06-10T00:00:00 Gravity corer, UWITEC GCUWI 5 m 660 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ AGE Age ka BP http://en.wikipedia.org/wiki/Kyr age http://purl.obolibrary.org/obo/PATO_0000011 Time T http://dbpedia.org/resource/Time Age, calibrated Fernández-Pérez Uxía 0000-0003-1022-7148 1950 CE Age [ka BP] δ Deuterium, wax δD wax ‰ SMOW wax http://purl.obolibrary.org/obo/CHEBI_73702 Gas chromatography-isotope ratio mass spectrometry (GC-IRMS), non-negative matrix factorization (NMF) https://en.wikipedia.org/wiki/Non-negative_matrix_factorization Fernández-Pérez Uxía 0000-0003-1022-7148 vs. VSMOW, (terrestrial NMF-corrected) δD wax [‰ SMOW] δ Deuterium, precipitation, reconstructed δD precip reconst ‰ SMOW reconstructed see reference(s) Fernández-Pérez Uxía 0000-0003-1022-7148 Apparent fractionation factor (εapp = −129 ± 12‰), Santos et al. (2022, 2024) δD precip reconst [‰ SMOW] δ Deuterium, precipitation, reconstructed, minimum δD precip reconst min ‰ SMOW reconstructed minimum Fernández-Pérez Uxía 0000-0003-1022-7148 lower bound, ε−12‰ δD precip reconst min [‰ SMOW] δ Deuterium, precipitation, reconstructed, maximum δD precip reconst max ‰ SMOW reconstructed maximum Fernández-Pérez Uxía 0000-0003-1022-7148 upper bound, ε+12‰ δD precip reconst max [‰ SMOW] Δδ Deuterium, wax ΔδD wax ‰ SMOW wax http://purl.obolibrary.org/obo/CHEBI_73702 Deviation from OIPC modern δ²H MAP (−56‰) Fernández-Pérez Uxía 0000-0003-1022-7148 Δδ²H vs δ²H MAP (anomaly) ΔδD wax [‰ SMOW] CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels citable Biomarkers d2H Holocene Lake Peixão Lake sediment core leaf waxes lipid biomarkers Mediterranean mountain mountain lakes n-alkanes North Atlantic Paleoclimate plant waxes Portugal precipitation reconstruction Serra da Estrela Western Iberia author107115 author117222 author117240 author117587 author21500 author22432 author30354 author30931 author32200 author36371 author41409 author43942 author48713 author53705 author54690 author56677 author60349 author63327 author63502 author63571 author64503 author64741 author82694 author82726 author82728 author88832 author97608 author97609 author97611 author97612 author97613 award1821 award2720 award4587 curlevel30 event3035839 funder20899 funder21149 geocode1599 geocode1600 geocode1601 geocode2205 geocode8128 inst2006 inst20572 inst20679 inst21087 inst21115 inst21222 inst21290 inst22169 inst22744 inst22746 inst277 journal13626 journal16996 journal4651 journal6009 license21 method11111 method174 method19359 method19368 method462 param166680 param510764 param566260 param566261 param566262 pi117222 ref116939 ref128504 ref139701 ref140501 term1073135 term1073960 term2687775 term38492 term390 term41019 term43975 term43996 term44348 term47128 term47192 term47193 term47957 term48797 term49699 term51826 term52123 term53862 term60854 term71560 term73461 term74696 term74697