High-resolution temporal dynamics of intra-storm isotopic composition of stemflow and throughfall in a Mediterranean Scots pine forest

Vegetation plays a significant role in the isotopic fractionation of rainwater during rainfall partitioning through the canopy into throughfall and stemflow. Most studies focus on the isotopic composition of throughfall, whereas that of stemflow has been studied much less frequently. Moreover, only...

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Detalles Bibliográficos
Autores: Pinos, Juan, Llorens, Pilar, Latron, Jérôme
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/279839
Acceso en línea:http://hdl.handle.net/10261/279839
https://api.elsevier.com/content/abstract/scopus_id/85137689219
Access Level:acceso abierto
Palabra clave:δ O and δ H 18 2
Deuterium excess
Isotope hydrology
Stable water isotopes
Temporal variation
Vallcebre research catchments
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spelling High-resolution temporal dynamics of intra-storm isotopic composition of stemflow and throughfall in a Mediterranean Scots pine forestPinos, JuanLlorens, PilarLatron, Jérômeδ O and δ H 18 2Deuterium excessIsotope hydrologyStable water isotopesTemporal variationVallcebre research catchmentsVegetation plays a significant role in the isotopic fractionation of rainwater during rainfall partitioning through the canopy into throughfall and stemflow. Most studies focus on the isotopic composition of throughfall, whereas that of stemflow has been studied much less frequently. Moreover, only three studies to date have investigated stemflow isotopic composition at the intra-storm scale. Therefore, knowledge of the isotopic shift between rainfall and throughfall/stemflow at fine resolutions is sorely needed in order to better understand water input to forest soils. In this study, intra-event rainfall, throughfall and stemflow in a Scots pine forest under Mediterranean conditions were monitored (5-min time step) over a 20-month period (May 2018 to December 2019) and water samples of each component were collected sequentially by means of automatic samplers for isotopic analysis (18O and 2H). Results obtained for 21 rainfall events show that throughfall was usually more enriched than rainfall and stemflow was more enriched than throughfall. Isotopic differences between rainfall and throughfall/stemflow indicated that throughfall was more depleted during the higher air temperature season whereas stemflow was more enriched. The isotopic shift did not show any direct relationship with either meteorological variables or the amount effect. At the intra-storm scale, stemflow was more enriched than rainfall and throughfall at the start of the rainfall event and tended to decrease towards the end. Our results suggest that evaporation led to stemflow enrichment due to stemflow residing longer on the vegetative surfaces than throughfall. However, most fractionation factors can occur during the same event. Our study will improve understanding of the physical processes that control stemflow isotopic composition in coniferous trees before reaching the ground, as a step towards improving isotope-based models for forest-water interactions.This research has been supported by the Spanish Ministry of Science and Innovation (grant nos. PID2019-106583RB-I00 and BES-2017-082234). IDAEA-CSIC is a Centre of Excellence Severo Ochoa (Spanish Ministry of Science and Innovation, Project CEX2018-000794-S). We are grateful to Gisel Bertran, Carles Cayuela, Francesc Gallart, and Elisenda Sánchez for their support during the field work. We also would like to thank Kazuki Nanko and Shitephen Wang for their valuable assistance in translation of Japanese and Chinese documents.Peer reviewedWiley-BlackwellMinisterio de Ciencia e Innovación (España)0000-0002-8021-91970000-0003-4591-53030000-0003-3253-6734Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/279839https://api.elsevier.com/content/abstract/scopus_id/85137689219reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/AEI/MCIN/CEX2018-000794-SHydrological ProcessesSíinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2798392026-05-22T06:33:51Z
dc.title.none.fl_str_mv High-resolution temporal dynamics of intra-storm isotopic composition of stemflow and throughfall in a Mediterranean Scots pine forest
title High-resolution temporal dynamics of intra-storm isotopic composition of stemflow and throughfall in a Mediterranean Scots pine forest
spellingShingle High-resolution temporal dynamics of intra-storm isotopic composition of stemflow and throughfall in a Mediterranean Scots pine forest
Pinos, Juan
δ O and δ H 18 2
Deuterium excess
Isotope hydrology
Stable water isotopes
Temporal variation
Vallcebre research catchments
title_short High-resolution temporal dynamics of intra-storm isotopic composition of stemflow and throughfall in a Mediterranean Scots pine forest
title_full High-resolution temporal dynamics of intra-storm isotopic composition of stemflow and throughfall in a Mediterranean Scots pine forest
title_fullStr High-resolution temporal dynamics of intra-storm isotopic composition of stemflow and throughfall in a Mediterranean Scots pine forest
title_full_unstemmed High-resolution temporal dynamics of intra-storm isotopic composition of stemflow and throughfall in a Mediterranean Scots pine forest
title_sort High-resolution temporal dynamics of intra-storm isotopic composition of stemflow and throughfall in a Mediterranean Scots pine forest
dc.creator.none.fl_str_mv Pinos, Juan
Llorens, Pilar
Latron, Jérôme
author Pinos, Juan
author_facet Pinos, Juan
Llorens, Pilar
Latron, Jérôme
author_role author
author2 Llorens, Pilar
Latron, Jérôme
author2_role author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
0000-0002-8021-9197
0000-0003-4591-5303
0000-0003-3253-6734
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv δ O and δ H 18 2
Deuterium excess
Isotope hydrology
Stable water isotopes
Temporal variation
Vallcebre research catchments
topic δ O and δ H 18 2
Deuterium excess
Isotope hydrology
Stable water isotopes
Temporal variation
Vallcebre research catchments
description Vegetation plays a significant role in the isotopic fractionation of rainwater during rainfall partitioning through the canopy into throughfall and stemflow. Most studies focus on the isotopic composition of throughfall, whereas that of stemflow has been studied much less frequently. Moreover, only three studies to date have investigated stemflow isotopic composition at the intra-storm scale. Therefore, knowledge of the isotopic shift between rainfall and throughfall/stemflow at fine resolutions is sorely needed in order to better understand water input to forest soils. In this study, intra-event rainfall, throughfall and stemflow in a Scots pine forest under Mediterranean conditions were monitored (5-min time step) over a 20-month period (May 2018 to December 2019) and water samples of each component were collected sequentially by means of automatic samplers for isotopic analysis (18O and 2H). Results obtained for 21 rainfall events show that throughfall was usually more enriched than rainfall and stemflow was more enriched than throughfall. Isotopic differences between rainfall and throughfall/stemflow indicated that throughfall was more depleted during the higher air temperature season whereas stemflow was more enriched. The isotopic shift did not show any direct relationship with either meteorological variables or the amount effect. At the intra-storm scale, stemflow was more enriched than rainfall and throughfall at the start of the rainfall event and tended to decrease towards the end. Our results suggest that evaporation led to stemflow enrichment due to stemflow residing longer on the vegetative surfaces than throughfall. However, most fractionation factors can occur during the same event. Our study will improve understanding of the physical processes that control stemflow isotopic composition in coniferous trees before reaching the ground, as a step towards improving isotope-based models for forest-water interactions.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/279839
https://api.elsevier.com/content/abstract/scopus_id/85137689219
url http://hdl.handle.net/10261/279839
https://api.elsevier.com/content/abstract/scopus_id/85137689219
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/AEI/MCIN/CEX2018-000794-S
Hydrological Processes
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Wiley-Blackwell
publisher.none.fl_str_mv Wiley-Blackwell
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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