Euphotic Zone Residence Time of Antarctic Bottom Water
Abstract Antarctic Bottom Water (AABW) transports surface nutrients deep into the ocean, sequestering them for centuries. Enhancing its biological carbon fixation could augment carbon sinks and reduce atmospheric CO2. Yet, it is uncertain if AABW receives enough light for significant photosynthesis...
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Online Access: | https://doi.org/10.1029/2023GL106342 https://doaj.org/article/fd36e0146d3b4d6a8276a86d912022f7 |
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ftdoajarticles:oai:doaj.org/article:fd36e0146d3b4d6a8276a86d912022f7 2024-09-15T17:46:03+00:00 Euphotic Zone Residence Time of Antarctic Bottom Water Yinghuan Xie Paul Spence Stuart Corney Veronica Tamsitt Hannah R. S. Dawson Christina Schmidt Lennart T. Bach 2024-05-01T00:00:00Z https://doi.org/10.1029/2023GL106342 https://doaj.org/article/fd36e0146d3b4d6a8276a86d912022f7 EN eng Wiley https://doi.org/10.1029/2023GL106342 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL106342 https://doaj.org/article/fd36e0146d3b4d6a8276a86d912022f7 Geophysical Research Letters, Vol 51, Iss 10, Pp n/a-n/a (2024) Antarctic Bottom Water Lagrangian experiment euphotic zone residence time meridional overturning circulation carbon dioxide removal Geophysics. Cosmic physics QC801-809 article 2024 ftdoajarticles https://doi.org/10.1029/2023GL106342 2024-08-05T17:49:00Z Abstract Antarctic Bottom Water (AABW) transports surface nutrients deep into the ocean, sequestering them for centuries. Enhancing its biological carbon fixation could augment carbon sinks and reduce atmospheric CO2. Yet, it is uncertain if AABW receives enough light for significant photosynthesis before subducting. Using Lagrangian particle tracking in an ocean sea‐ice model, we found: (a) 70% (66%–73%, depending on euphotic zone (Zeu) criteria) nutrient rich circumpolar deep water never enters the Zeu before becoming AABW. This percentage varies from 70% to 91%, depending on the mixed layer (ML) parameterization adjustments; (b) The remaining particles in the euphotic zone have 39 (34–49, depending on Zeu criteria) days average residence time. The time is not sensitive to ML parameterization strength but turning it off doubles the time; and (c) AABW is mainly exposed to enough light on the Antarctic continental shelf during spring and summer. We conclude that the potential of biotic carbon sequestration in AABW is highly limited by light energy. Article in Journal/Newspaper Antarc* Antarctic Sea ice Directory of Open Access Journals: DOAJ Articles Geophysical Research Letters 51 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic Bottom Water Lagrangian experiment euphotic zone residence time meridional overturning circulation carbon dioxide removal Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Antarctic Bottom Water Lagrangian experiment euphotic zone residence time meridional overturning circulation carbon dioxide removal Geophysics. Cosmic physics QC801-809 Yinghuan Xie Paul Spence Stuart Corney Veronica Tamsitt Hannah R. S. Dawson Christina Schmidt Lennart T. Bach Euphotic Zone Residence Time of Antarctic Bottom Water |
topic_facet |
Antarctic Bottom Water Lagrangian experiment euphotic zone residence time meridional overturning circulation carbon dioxide removal Geophysics. Cosmic physics QC801-809 |
description |
Abstract Antarctic Bottom Water (AABW) transports surface nutrients deep into the ocean, sequestering them for centuries. Enhancing its biological carbon fixation could augment carbon sinks and reduce atmospheric CO2. Yet, it is uncertain if AABW receives enough light for significant photosynthesis before subducting. Using Lagrangian particle tracking in an ocean sea‐ice model, we found: (a) 70% (66%–73%, depending on euphotic zone (Zeu) criteria) nutrient rich circumpolar deep water never enters the Zeu before becoming AABW. This percentage varies from 70% to 91%, depending on the mixed layer (ML) parameterization adjustments; (b) The remaining particles in the euphotic zone have 39 (34–49, depending on Zeu criteria) days average residence time. The time is not sensitive to ML parameterization strength but turning it off doubles the time; and (c) AABW is mainly exposed to enough light on the Antarctic continental shelf during spring and summer. We conclude that the potential of biotic carbon sequestration in AABW is highly limited by light energy. |
format |
Article in Journal/Newspaper |
author |
Yinghuan Xie Paul Spence Stuart Corney Veronica Tamsitt Hannah R. S. Dawson Christina Schmidt Lennart T. Bach |
author_facet |
Yinghuan Xie Paul Spence Stuart Corney Veronica Tamsitt Hannah R. S. Dawson Christina Schmidt Lennart T. Bach |
author_sort |
Yinghuan Xie |
title |
Euphotic Zone Residence Time of Antarctic Bottom Water |
title_short |
Euphotic Zone Residence Time of Antarctic Bottom Water |
title_full |
Euphotic Zone Residence Time of Antarctic Bottom Water |
title_fullStr |
Euphotic Zone Residence Time of Antarctic Bottom Water |
title_full_unstemmed |
Euphotic Zone Residence Time of Antarctic Bottom Water |
title_sort |
euphotic zone residence time of antarctic bottom water |
publisher |
Wiley |
publishDate |
2024 |
url |
https://doi.org/10.1029/2023GL106342 https://doaj.org/article/fd36e0146d3b4d6a8276a86d912022f7 |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_source |
Geophysical Research Letters, Vol 51, Iss 10, Pp n/a-n/a (2024) |
op_relation |
https://doi.org/10.1029/2023GL106342 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL106342 https://doaj.org/article/fd36e0146d3b4d6a8276a86d912022f7 |
op_doi |
https://doi.org/10.1029/2023GL106342 |
container_title |
Geophysical Research Letters |
container_volume |
51 |
container_issue |
10 |
_version_ |
1810494010348797952 |