Dissolved inorganic Radiocarbon content of the Western Coral sea: Implications for Intermediate and Deep Water Circulation
International audience ABSTRACT The South Pacific Ocean contributes to the global carbon cycle by exchanging CO 2 between the atmosphere and intermediate to deep water masses. The path of the Antarctic Intermediate Water (AAIW) in the South Pacific gyre has been inferred from salinity, oxygen, and n...
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Online Access: | https://hal.science/hal-04238788 https://doi.org/10.1017/RDC.2019.122 |
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ftuniparissaclay:oai:HAL:hal-04238788v1 2024-09-30T14:23:00+00:00 Dissolved inorganic Radiocarbon content of the Western Coral sea: Implications for Intermediate and Deep Water Circulation Servettaz, Aymeric Pm Yokoyama, Yusuke Hirabayashi, Shoko Kienast, Markus Miyairi, Yosuke Mohtadi, Mahyar Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Atmosphere and Ocean Research Institute Kashiwa-shi (AORI) The University of Tokyo (UTokyo) Dalhousie University Halifax Center for Marine Environmental Sciences Bremen (MARUM) Universität Bremen 2019-12 https://hal.science/hal-04238788 https://doi.org/10.1017/RDC.2019.122 en eng HAL CCSD University of Arizona info:eu-repo/semantics/altIdentifier/doi/10.1017/RDC.2019.122 hal-04238788 https://hal.science/hal-04238788 doi:10.1017/RDC.2019.122 ISSN: 0033-8222 EISSN: 1945-5755 Radiocarbon https://hal.science/hal-04238788 Radiocarbon, 2019, 61 (6), pp.1685-1696. ⟨10.1017/RDC.2019.122⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2019 ftuniparissaclay https://doi.org/10.1017/RDC.2019.122 2024-09-06T00:30:27Z International audience ABSTRACT The South Pacific Ocean contributes to the global carbon cycle by exchanging CO 2 between the atmosphere and intermediate to deep water masses. The path of the Antarctic Intermediate Water (AAIW) in the South Pacific gyre has been inferred from salinity, oxygen, and nutrient measurements, but radiocarbon ( 14 C) measurements—a direct tracer of the carbon cycle—remain sparse. Here, we present the first radiocarbon profiles in the western Coral Sea and compare our measurements with South Pacific stations from GLODAPv2, a database of ocean hydrochemistry. Surface and subsurface waters in the Coral Sea cannot be attributed to a single source based on their Δ 14 C signatures, and we observe a penetration of bomb-produced 14 C. AAIW in the western Coral Sea shows Δ 14 C values comparable to those in the South Pacific gyre, consistent with circulation of AAIW in the lower part of the southern equatorial current. The deep waters of the western Coral Sea have significantly higher 14 C than the South Pacific at the same isopycnal, consistent with a northward intrusion of Circumpolar Deep Water from the Tasman Sea, along with a westward influx of deep waters from the Central Pacific. In accordance with silicate concentrations published previously, this shows the dual origin of deep waters in the Coral Sea. Article in Journal/Newspaper Antarc* Antarctic Archives ouvertes de Paris-Saclay Antarctic Pacific The Antarctic Radiocarbon 61 6 1685 1696 |
institution |
Open Polar |
collection |
Archives ouvertes de Paris-Saclay |
op_collection_id |
ftuniparissaclay |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Servettaz, Aymeric Pm Yokoyama, Yusuke Hirabayashi, Shoko Kienast, Markus Miyairi, Yosuke Mohtadi, Mahyar Dissolved inorganic Radiocarbon content of the Western Coral sea: Implications for Intermediate and Deep Water Circulation |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience ABSTRACT The South Pacific Ocean contributes to the global carbon cycle by exchanging CO 2 between the atmosphere and intermediate to deep water masses. The path of the Antarctic Intermediate Water (AAIW) in the South Pacific gyre has been inferred from salinity, oxygen, and nutrient measurements, but radiocarbon ( 14 C) measurements—a direct tracer of the carbon cycle—remain sparse. Here, we present the first radiocarbon profiles in the western Coral Sea and compare our measurements with South Pacific stations from GLODAPv2, a database of ocean hydrochemistry. Surface and subsurface waters in the Coral Sea cannot be attributed to a single source based on their Δ 14 C signatures, and we observe a penetration of bomb-produced 14 C. AAIW in the western Coral Sea shows Δ 14 C values comparable to those in the South Pacific gyre, consistent with circulation of AAIW in the lower part of the southern equatorial current. The deep waters of the western Coral Sea have significantly higher 14 C than the South Pacific at the same isopycnal, consistent with a northward intrusion of Circumpolar Deep Water from the Tasman Sea, along with a westward influx of deep waters from the Central Pacific. In accordance with silicate concentrations published previously, this shows the dual origin of deep waters in the Coral Sea. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Atmosphere and Ocean Research Institute Kashiwa-shi (AORI) The University of Tokyo (UTokyo) Dalhousie University Halifax Center for Marine Environmental Sciences Bremen (MARUM) Universität Bremen |
format |
Article in Journal/Newspaper |
author |
Servettaz, Aymeric Pm Yokoyama, Yusuke Hirabayashi, Shoko Kienast, Markus Miyairi, Yosuke Mohtadi, Mahyar |
author_facet |
Servettaz, Aymeric Pm Yokoyama, Yusuke Hirabayashi, Shoko Kienast, Markus Miyairi, Yosuke Mohtadi, Mahyar |
author_sort |
Servettaz, Aymeric Pm |
title |
Dissolved inorganic Radiocarbon content of the Western Coral sea: Implications for Intermediate and Deep Water Circulation |
title_short |
Dissolved inorganic Radiocarbon content of the Western Coral sea: Implications for Intermediate and Deep Water Circulation |
title_full |
Dissolved inorganic Radiocarbon content of the Western Coral sea: Implications for Intermediate and Deep Water Circulation |
title_fullStr |
Dissolved inorganic Radiocarbon content of the Western Coral sea: Implications for Intermediate and Deep Water Circulation |
title_full_unstemmed |
Dissolved inorganic Radiocarbon content of the Western Coral sea: Implications for Intermediate and Deep Water Circulation |
title_sort |
dissolved inorganic radiocarbon content of the western coral sea: implications for intermediate and deep water circulation |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-04238788 https://doi.org/10.1017/RDC.2019.122 |
geographic |
Antarctic Pacific The Antarctic |
geographic_facet |
Antarctic Pacific The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 0033-8222 EISSN: 1945-5755 Radiocarbon https://hal.science/hal-04238788 Radiocarbon, 2019, 61 (6), pp.1685-1696. ⟨10.1017/RDC.2019.122⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1017/RDC.2019.122 hal-04238788 https://hal.science/hal-04238788 doi:10.1017/RDC.2019.122 |
op_doi |
https://doi.org/10.1017/RDC.2019.122 |
container_title |
Radiocarbon |
container_volume |
61 |
container_issue |
6 |
container_start_page |
1685 |
op_container_end_page |
1696 |
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1811636183053107200 |