A recent decline in North Atlantic subtropical mode water formation
International audience As a manifestation of mixing dynamics in the upper ocean, interannual and decadal variability of subtropical mode water (STMW) properties in the North Atlantic Ocean provides a valuable insight into ocean–atmosphere interaction in a changing climate. Here, we use hydrographic...
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Online Access: | https://hal.science/hal-04202544 https://doi.org/10.1038/s41558-020-0722-3 |
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ftinsu:oai:HAL:hal-04202544v1 2024-04-14T08:15:33+00:00 A recent decline in North Atlantic subtropical mode water formation Stevens, Samuel W. Johnson, Rodney J. Maze, Guillaume Bates, Nicholas R. Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2020-04 https://hal.science/hal-04202544 https://doi.org/10.1038/s41558-020-0722-3 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41558-020-0722-3 hal-04202544 https://hal.science/hal-04202544 doi:10.1038/s41558-020-0722-3 ISSN: 1758-678X EISSN: 1758-6798 Nature Climate Change https://hal.science/hal-04202544 Nature Climate Change, 2020, 10 (4), pp.335-341. ⟨10.1038/s41558-020-0722-3⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2020 ftinsu https://doi.org/10.1038/s41558-020-0722-3 2024-03-21T17:06:29Z International audience As a manifestation of mixing dynamics in the upper ocean, interannual and decadal variability of subtropical mode water (STMW) properties in the North Atlantic Ocean provides a valuable insight into ocean–atmosphere interaction in a changing climate. Here, we use hydrographic data from the Bermuda Atlantic Time-Series Study and Hydrostation S sites near Bermuda, as well as various ocean reanalysis products, to evaluate the modern variability of STMW properties. Our study finds an 86–93% loss of STMW thickness at these sites between 2010 and 2018 and a comparable loss throughout the western subtropical gyre, culminating in the weakest STMW pentad on record. We correlate this decline with a reduction in the annual outcropping volume and northward excursions of the formation region, suggesting a gyre-wide signal of weakening STMW generation. The outcropping volume of STMW is anti-correlated with surface ocean heat content, foreshadowing future STMW loss in the face of continued warming. Article in Journal/Newspaper North Atlantic Institut national des sciences de l'Univers: HAL-INSU Nature Climate Change 10 4 335 341 |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Stevens, Samuel W. Johnson, Rodney J. Maze, Guillaume Bates, Nicholas R. A recent decline in North Atlantic subtropical mode water formation |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience As a manifestation of mixing dynamics in the upper ocean, interannual and decadal variability of subtropical mode water (STMW) properties in the North Atlantic Ocean provides a valuable insight into ocean–atmosphere interaction in a changing climate. Here, we use hydrographic data from the Bermuda Atlantic Time-Series Study and Hydrostation S sites near Bermuda, as well as various ocean reanalysis products, to evaluate the modern variability of STMW properties. Our study finds an 86–93% loss of STMW thickness at these sites between 2010 and 2018 and a comparable loss throughout the western subtropical gyre, culminating in the weakest STMW pentad on record. We correlate this decline with a reduction in the annual outcropping volume and northward excursions of the formation region, suggesting a gyre-wide signal of weakening STMW generation. The outcropping volume of STMW is anti-correlated with surface ocean heat content, foreshadowing future STMW loss in the face of continued warming. |
author2 |
Laboratoire d'Océanographie Physique et Spatiale (LOPS) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Stevens, Samuel W. Johnson, Rodney J. Maze, Guillaume Bates, Nicholas R. |
author_facet |
Stevens, Samuel W. Johnson, Rodney J. Maze, Guillaume Bates, Nicholas R. |
author_sort |
Stevens, Samuel W. |
title |
A recent decline in North Atlantic subtropical mode water formation |
title_short |
A recent decline in North Atlantic subtropical mode water formation |
title_full |
A recent decline in North Atlantic subtropical mode water formation |
title_fullStr |
A recent decline in North Atlantic subtropical mode water formation |
title_full_unstemmed |
A recent decline in North Atlantic subtropical mode water formation |
title_sort |
recent decline in north atlantic subtropical mode water formation |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-04202544 https://doi.org/10.1038/s41558-020-0722-3 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 1758-678X EISSN: 1758-6798 Nature Climate Change https://hal.science/hal-04202544 Nature Climate Change, 2020, 10 (4), pp.335-341. ⟨10.1038/s41558-020-0722-3⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41558-020-0722-3 hal-04202544 https://hal.science/hal-04202544 doi:10.1038/s41558-020-0722-3 |
op_doi |
https://doi.org/10.1038/s41558-020-0722-3 |
container_title |
Nature Climate Change |
container_volume |
10 |
container_issue |
4 |
container_start_page |
335 |
op_container_end_page |
341 |
_version_ |
1796313917361750016 |