Carbonate weathering as a driver of carbon dioxide supersaturation in lakes

Most lakes and reservoirs have surface CO2 concentrations that are supersaturated relative to the atmosphere1. The resulting CO2 emissions from lakes represent a substantial contribution to the continental carbon balance2, 3, 4. Thus, the drivers of CO2 supersaturation in lakes need to be understood...

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Autores: Marcé Romero, Rafael, Obrador Sala, Biel, Morguí i Castelló, Josep Anton, Riera, Joan Lluís, López Laseras, Ma. Pilar, Armengol, Joan (Armengol Bachero)
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2015
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/218220
Acceso en línea:https://hdl.handle.net/2445/218220
Access Level:acceso abierto
Palabra clave:Llacs
Diòxid de carboni
Lakes
Carbon dioxide
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spelling Carbonate weathering as a driver of carbon dioxide supersaturation in lakesMarcé Romero, RafaelObrador Sala, BielMorguí i Castelló, Josep AntonRiera, Joan LluísLópez Laseras, Ma. PilarArmengol, Joan (Armengol Bachero)LlacsDiòxid de carboniLakesCarbon dioxideMost lakes and reservoirs have surface CO2 concentrations that are supersaturated relative to the atmosphere1. The resulting CO2 emissions from lakes represent a substantial contribution to the continental carbon balance2, 3, 4. Thus, the drivers of CO2 supersaturation in lakes need to be understood to constrain the sensitivity of the land carbon cycle to external perturbations4, 5, 6. Carbon dioxide supersaturation has generally been attributed to the accumulation of inorganic carbon in lakes where respiration exceeds photosynthesis7, 8, but this interpretation has faced challenges9, 10, 11. Here we report analyses of water chemistry data from a survey of Spanish reservoirs that represent a range of lithologies, using simple metabolic models. We find that, above an alkalinity threshold of 1 mequiv. l−1, CO2 supersaturation in lakes is directly related to carbonate weathering in the watershed. We then evaluate the global distribution of alkalinity in lakes and find that 57% of the surface area occupied by lakes and reservoirs¿particularly in tropical and temperate latitudes¿has alkalinity exceeding 1 mequiv. l−1. We conclude that lake inputs of dissolved inorganic carbon from carbonate weathering should be considered for the CO2 supersaturation of lakes at both regional and global scales.Nature Publishing Group2015info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/218220Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésVersió postprint del document publicat a: https://doi.org/10.1038/ngeo2341Nature Geoscience, 2015, vol. 8, num.2, p. 107-111https://doi.org/10.1038/ngeo2341(c) Marcé, R. et al., 2015info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2182202026-05-27T06:46:51Z
dc.title.none.fl_str_mv Carbonate weathering as a driver of carbon dioxide supersaturation in lakes
title Carbonate weathering as a driver of carbon dioxide supersaturation in lakes
spellingShingle Carbonate weathering as a driver of carbon dioxide supersaturation in lakes
Marcé Romero, Rafael
Llacs
Diòxid de carboni
Lakes
Carbon dioxide
title_short Carbonate weathering as a driver of carbon dioxide supersaturation in lakes
title_full Carbonate weathering as a driver of carbon dioxide supersaturation in lakes
title_fullStr Carbonate weathering as a driver of carbon dioxide supersaturation in lakes
title_full_unstemmed Carbonate weathering as a driver of carbon dioxide supersaturation in lakes
title_sort Carbonate weathering as a driver of carbon dioxide supersaturation in lakes
dc.creator.none.fl_str_mv Marcé Romero, Rafael
Obrador Sala, Biel
Morguí i Castelló, Josep Anton
Riera, Joan Lluís
López Laseras, Ma. Pilar
Armengol, Joan (Armengol Bachero)
author Marcé Romero, Rafael
author_facet Marcé Romero, Rafael
Obrador Sala, Biel
Morguí i Castelló, Josep Anton
Riera, Joan Lluís
López Laseras, Ma. Pilar
Armengol, Joan (Armengol Bachero)
author_role author
author2 Obrador Sala, Biel
Morguí i Castelló, Josep Anton
Riera, Joan Lluís
López Laseras, Ma. Pilar
Armengol, Joan (Armengol Bachero)
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Llacs
Diòxid de carboni
Lakes
Carbon dioxide
topic Llacs
Diòxid de carboni
Lakes
Carbon dioxide
description Most lakes and reservoirs have surface CO2 concentrations that are supersaturated relative to the atmosphere1. The resulting CO2 emissions from lakes represent a substantial contribution to the continental carbon balance2, 3, 4. Thus, the drivers of CO2 supersaturation in lakes need to be understood to constrain the sensitivity of the land carbon cycle to external perturbations4, 5, 6. Carbon dioxide supersaturation has generally been attributed to the accumulation of inorganic carbon in lakes where respiration exceeds photosynthesis7, 8, but this interpretation has faced challenges9, 10, 11. Here we report analyses of water chemistry data from a survey of Spanish reservoirs that represent a range of lithologies, using simple metabolic models. We find that, above an alkalinity threshold of 1 mequiv. l−1, CO2 supersaturation in lakes is directly related to carbonate weathering in the watershed. We then evaluate the global distribution of alkalinity in lakes and find that 57% of the surface area occupied by lakes and reservoirs¿particularly in tropical and temperate latitudes¿has alkalinity exceeding 1 mequiv. l−1. We conclude that lake inputs of dissolved inorganic carbon from carbonate weathering should be considered for the CO2 supersaturation of lakes at both regional and global scales.
publishDate 2015
dc.date.none.fl_str_mv 2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/218220
url https://hdl.handle.net/2445/218220
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1038/ngeo2341
Nature Geoscience, 2015, vol. 8, num.2, p. 107-111
https://doi.org/10.1038/ngeo2341
dc.rights.none.fl_str_mv (c) Marcé, R. et al., 2015
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Marcé, R. et al., 2015
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Nature Publishing Group
publisher.none.fl_str_mv Nature Publishing Group
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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