On the barium–oxygen consumption relationship in the Mediterranean Sea: implications for mesopelagic marine snow remineralization
International audience Abstract. In the ocean, remineralization rate associated with sinking particles is a crucial variable. Since the 1990s, particulate biogenic barium (Baxs) has been used as an indicator of carbon remineralization by applying a transfer function relating Baxs to O2 consumption (...
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Online Access: | https://hal.archives-ouvertes.fr/hal-03372799 https://doi.org/10.5194/bg-18-2205-2021 |
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ftccsdartic:oai:HAL:hal-03372799v1 2023-05-15T18:24:56+02:00 On the barium–oxygen consumption relationship in the Mediterranean Sea: implications for mesopelagic marine snow remineralization Jacquet, Stéphanie Lefèvre, Dominique Tamburini, Christian Garel, Marc Le Moigne, Frédéric Bhairy, Nagib Guasco, Sophie Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN) 2021 https://hal.archives-ouvertes.fr/hal-03372799 https://doi.org/10.5194/bg-18-2205-2021 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-18-2205-2021 hal-03372799 https://hal.archives-ouvertes.fr/hal-03372799 doi:10.5194/bg-18-2205-2021 ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.archives-ouvertes.fr/hal-03372799 Biogeosciences, European Geosciences Union, 2021, 18 (6), pp.2205-2212. ⟨10.5194/bg-18-2205-2021⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2021 ftccsdartic https://doi.org/10.5194/bg-18-2205-2021 2021-10-16T22:23:47Z International audience Abstract. In the ocean, remineralization rate associated with sinking particles is a crucial variable. Since the 1990s, particulate biogenic barium (Baxs) has been used as an indicator of carbon remineralization by applying a transfer function relating Baxs to O2 consumption (Dehairs's transfer function, Southern Ocean-based). Here, we tested its validity in the Mediterranean Sea (ANTARES/EMSO-LO) for the first time by investigating connections between Baxs, prokaryotic heterotrophic production (PHP) and oxygen consumption (JO2-Opt; optodes measurement). We show that (1) higher Baxs (409 pM; 100–500 m) occurs in situations where integrated PHP (PHP100/500=0.90) is located deeper, (2) higher Baxs occurs with increasing JO2-Opt, and (3) there is similar magnitude between JO2-Opt (3.14 mmol m−2 d−1; 175–450 m) and JO2-Ba (4.59 mmol m−2 d−1; transfer function). Overall, Baxs, PHP and JO2 relationships follow trends observed earlier in the Southern Ocean. We conclude that such a transfer function could apply in the Mediterranean Sea. Article in Journal/Newspaper Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Southern Ocean Biogeosciences 18 6 2205 2212 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Jacquet, Stéphanie Lefèvre, Dominique Tamburini, Christian Garel, Marc Le Moigne, Frédéric Bhairy, Nagib Guasco, Sophie On the barium–oxygen consumption relationship in the Mediterranean Sea: implications for mesopelagic marine snow remineralization |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Abstract. In the ocean, remineralization rate associated with sinking particles is a crucial variable. Since the 1990s, particulate biogenic barium (Baxs) has been used as an indicator of carbon remineralization by applying a transfer function relating Baxs to O2 consumption (Dehairs's transfer function, Southern Ocean-based). Here, we tested its validity in the Mediterranean Sea (ANTARES/EMSO-LO) for the first time by investigating connections between Baxs, prokaryotic heterotrophic production (PHP) and oxygen consumption (JO2-Opt; optodes measurement). We show that (1) higher Baxs (409 pM; 100–500 m) occurs in situations where integrated PHP (PHP100/500=0.90) is located deeper, (2) higher Baxs occurs with increasing JO2-Opt, and (3) there is similar magnitude between JO2-Opt (3.14 mmol m−2 d−1; 175–450 m) and JO2-Ba (4.59 mmol m−2 d−1; transfer function). Overall, Baxs, PHP and JO2 relationships follow trends observed earlier in the Southern Ocean. We conclude that such a transfer function could apply in the Mediterranean Sea. |
author2 |
Institut méditerranéen d'océanologie (MIO) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN) |
format |
Article in Journal/Newspaper |
author |
Jacquet, Stéphanie Lefèvre, Dominique Tamburini, Christian Garel, Marc Le Moigne, Frédéric Bhairy, Nagib Guasco, Sophie |
author_facet |
Jacquet, Stéphanie Lefèvre, Dominique Tamburini, Christian Garel, Marc Le Moigne, Frédéric Bhairy, Nagib Guasco, Sophie |
author_sort |
Jacquet, Stéphanie |
title |
On the barium–oxygen consumption relationship in the Mediterranean Sea: implications for mesopelagic marine snow remineralization |
title_short |
On the barium–oxygen consumption relationship in the Mediterranean Sea: implications for mesopelagic marine snow remineralization |
title_full |
On the barium–oxygen consumption relationship in the Mediterranean Sea: implications for mesopelagic marine snow remineralization |
title_fullStr |
On the barium–oxygen consumption relationship in the Mediterranean Sea: implications for mesopelagic marine snow remineralization |
title_full_unstemmed |
On the barium–oxygen consumption relationship in the Mediterranean Sea: implications for mesopelagic marine snow remineralization |
title_sort |
on the barium–oxygen consumption relationship in the mediterranean sea: implications for mesopelagic marine snow remineralization |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.archives-ouvertes.fr/hal-03372799 https://doi.org/10.5194/bg-18-2205-2021 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.archives-ouvertes.fr/hal-03372799 Biogeosciences, European Geosciences Union, 2021, 18 (6), pp.2205-2212. ⟨10.5194/bg-18-2205-2021⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-18-2205-2021 hal-03372799 https://hal.archives-ouvertes.fr/hal-03372799 doi:10.5194/bg-18-2205-2021 |
op_doi |
https://doi.org/10.5194/bg-18-2205-2021 |
container_title |
Biogeosciences |
container_volume |
18 |
container_issue |
6 |
container_start_page |
2205 |
op_container_end_page |
2212 |
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1766205997248937984 |