Drought recorded by Ba∕Ca in coastal benthic foraminifera
International audience Increasing occurrences of extreme weather events, such as the 2018 drought over northern Europe, are a concerning issue under global climate change. High-resolution archives of natural hydroclimate proxies, such as rapidly accumulating sediments containing biogenic carbonates,...
Published in: | Biogeosciences |
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2022
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Online Access: | https://insu.hal.science/insu-03682338 https://insu.hal.science/insu-03682338/document https://insu.hal.science/insu-03682338/file/bg-19-2523-2022.pdf https://doi.org/10.5194/bg-19-2523-2022 |
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ftunimainelemans:oai:HAL:insu-03682338v1 2024-02-11T10:08:06+01:00 Drought recorded by Ba∕Ca in coastal benthic foraminifera Brinkmann, Inda Barras, Christine Jilbert, Tom Næraa, Tomas Mareike Paul, K. Schweizer, Magali Filipsson, Helena L. Laboratoire de Planétologie et Géosciences UMR_C 6112 (LPG) Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST) Nantes Université - pôle Sciences et technologie Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ) 2022 https://insu.hal.science/insu-03682338 https://insu.hal.science/insu-03682338/document https://insu.hal.science/insu-03682338/file/bg-19-2523-2022.pdf https://doi.org/10.5194/bg-19-2523-2022 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-19-2523-2022 insu-03682338 https://insu.hal.science/insu-03682338 https://insu.hal.science/insu-03682338/document https://insu.hal.science/insu-03682338/file/bg-19-2523-2022.pdf BIBCODE: 2022BGeo.19.2523B doi:10.5194/bg-19-2523-2022 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://insu.hal.science/insu-03682338 Biogeosciences, 2022, 19, pp.2523-2535. ⟨10.5194/bg-19-2523-2022⟩ [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2022 ftunimainelemans https://doi.org/10.5194/bg-19-2523-2022 2024-01-24T17:38:38Z International audience Increasing occurrences of extreme weather events, such as the 2018 drought over northern Europe, are a concerning issue under global climate change. High-resolution archives of natural hydroclimate proxies, such as rapidly accumulating sediments containing biogenic carbonates, offer the potential to investigate the frequency and mechanisms of such events in the past. Droughts alter the barium (Ba) concentration of near-continent seawater through the reduction in Ba input from terrestrial runoff, which in turn may be recorded as changes in the chemical composition (Ba/Ca) of foraminiferal calcium carbonates accumulating in sediments. However, so far the use of Ba/Ca as a discharge indicator has been restricted to planktonic foraminifera, despite the high relative abundance of benthic species in coastal, shallow-water sites. Moreover, benthic foraminiferal Ba/Ca has mainly been used in open-ocean records as a proxy for paleo-productivity. Here we report on a new geochemical data set measured from living (CTG-labeled) benthic foraminiferal species to investigate the capability of benthic Ba/Ca to record changes in river runoff over a gradient of contrasting hydroclimatic conditions. Individual foraminifera (Bulimina marginata, Nonionellina labradorica) were analyzed by laser-ablation ICP-MS over a seasonal and spatial gradient within Gullmar Fjord, Swedish west coast, during 2018-2019. The results are compared to an extensive meteorological and hydrological data set, as well as sediment and pore-water geochemistry. Benthic foraminiferal Ba/Ca correlates significantly to riverine runoff; however, the signals contain both spatial trends with distance to Ba source and species-specific influences such as micro-habitat preferences. We deduce that shallow-infaunal foraminifera are especially suitable as proxy for terrestrial Ba input and discuss the potential influence of water-column and pore-water Ba cycling. While distance to Ba source, water depth, pore-water geochemistry, and ... Article in Journal/Newspaper Planktonic foraminifera Le Mans Université: Archives Ouvertes (HAL) Biogeosciences 19 9 2523 2535 |
institution |
Open Polar |
collection |
Le Mans Université: Archives Ouvertes (HAL) |
op_collection_id |
ftunimainelemans |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Brinkmann, Inda Barras, Christine Jilbert, Tom Næraa, Tomas Mareike Paul, K. Schweizer, Magali Filipsson, Helena L. Drought recorded by Ba∕Ca in coastal benthic foraminifera |
topic_facet |
[SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Increasing occurrences of extreme weather events, such as the 2018 drought over northern Europe, are a concerning issue under global climate change. High-resolution archives of natural hydroclimate proxies, such as rapidly accumulating sediments containing biogenic carbonates, offer the potential to investigate the frequency and mechanisms of such events in the past. Droughts alter the barium (Ba) concentration of near-continent seawater through the reduction in Ba input from terrestrial runoff, which in turn may be recorded as changes in the chemical composition (Ba/Ca) of foraminiferal calcium carbonates accumulating in sediments. However, so far the use of Ba/Ca as a discharge indicator has been restricted to planktonic foraminifera, despite the high relative abundance of benthic species in coastal, shallow-water sites. Moreover, benthic foraminiferal Ba/Ca has mainly been used in open-ocean records as a proxy for paleo-productivity. Here we report on a new geochemical data set measured from living (CTG-labeled) benthic foraminiferal species to investigate the capability of benthic Ba/Ca to record changes in river runoff over a gradient of contrasting hydroclimatic conditions. Individual foraminifera (Bulimina marginata, Nonionellina labradorica) were analyzed by laser-ablation ICP-MS over a seasonal and spatial gradient within Gullmar Fjord, Swedish west coast, during 2018-2019. The results are compared to an extensive meteorological and hydrological data set, as well as sediment and pore-water geochemistry. Benthic foraminiferal Ba/Ca correlates significantly to riverine runoff; however, the signals contain both spatial trends with distance to Ba source and species-specific influences such as micro-habitat preferences. We deduce that shallow-infaunal foraminifera are especially suitable as proxy for terrestrial Ba input and discuss the potential influence of water-column and pore-water Ba cycling. While distance to Ba source, water depth, pore-water geochemistry, and ... |
author2 |
Laboratoire de Planétologie et Géosciences UMR_C 6112 (LPG) Le Mans Université (UM)-Université d'Angers (UA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST) Nantes Université - pôle Sciences et technologie Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ) |
format |
Article in Journal/Newspaper |
author |
Brinkmann, Inda Barras, Christine Jilbert, Tom Næraa, Tomas Mareike Paul, K. Schweizer, Magali Filipsson, Helena L. |
author_facet |
Brinkmann, Inda Barras, Christine Jilbert, Tom Næraa, Tomas Mareike Paul, K. Schweizer, Magali Filipsson, Helena L. |
author_sort |
Brinkmann, Inda |
title |
Drought recorded by Ba∕Ca in coastal benthic foraminifera |
title_short |
Drought recorded by Ba∕Ca in coastal benthic foraminifera |
title_full |
Drought recorded by Ba∕Ca in coastal benthic foraminifera |
title_fullStr |
Drought recorded by Ba∕Ca in coastal benthic foraminifera |
title_full_unstemmed |
Drought recorded by Ba∕Ca in coastal benthic foraminifera |
title_sort |
drought recorded by ba∕ca in coastal benthic foraminifera |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://insu.hal.science/insu-03682338 https://insu.hal.science/insu-03682338/document https://insu.hal.science/insu-03682338/file/bg-19-2523-2022.pdf https://doi.org/10.5194/bg-19-2523-2022 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://insu.hal.science/insu-03682338 Biogeosciences, 2022, 19, pp.2523-2535. ⟨10.5194/bg-19-2523-2022⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-19-2523-2022 insu-03682338 https://insu.hal.science/insu-03682338 https://insu.hal.science/insu-03682338/document https://insu.hal.science/insu-03682338/file/bg-19-2523-2022.pdf BIBCODE: 2022BGeo.19.2523B doi:10.5194/bg-19-2523-2022 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-19-2523-2022 |
container_title |
Biogeosciences |
container_volume |
19 |
container_issue |
9 |
container_start_page |
2523 |
op_container_end_page |
2535 |
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1790607053921714176 |