Temporal variability of lagoon–sea water exchange and seawater circulation through a Mediterranean barrier beach
Abstract The subterranean flow of water through sand barriers between coastal lagoons and the sea, driven by a positive hydraulic gradient, is a net new pathway for solute transfer to the sea. On the sea side of sand barriers, seawater circulation in the swash‐zone generates a flux of recycled and n...
Published in: | Limnology and Oceanography |
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crwiley:10.1002/lno.11169 2024-09-09T20:01:40+00:00 Temporal variability of lagoon–sea water exchange and seawater circulation through a Mediterranean barrier beach Tamborski, Joseph van Beek, Pieter Rodellas, Valentí Monnin, Christophe Bergsma, Erwin Stieglitz, Thomas Heilbrun, Christina Cochran, J. Kirk Charbonnier, Céline Anschutz, Pierre Bejannin, Simon Beck, Aaron Agence Nationale de la Recherche European Commission 2019 http://dx.doi.org/10.1002/lno.11169 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11169 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11169 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11169 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography volume 64, issue 5, page 2059-2080 ISSN 0024-3590 1939-5590 journal-article 2019 crwiley https://doi.org/10.1002/lno.11169 2024-07-30T04:23:45Z Abstract The subterranean flow of water through sand barriers between coastal lagoons and the sea, driven by a positive hydraulic gradient, is a net new pathway for solute transfer to the sea. On the sea side of sand barriers, seawater circulation in the swash‐zone generates a flux of recycled and new solutes. The significance and temporal variability of these vectors to the French Mediterranean Sea is unknown, despite lagoons constituting ~ 50% of the coastline. A one‐dimensional 224 Ra ex / 223 Ra reactive‐transport model was used to quantify water flow between a coastal lagoon (La Palme) and the sea over a 6‐month period. Horizontal flow between the lagoon and sea decreased from ~ 85 cm d −1 during May 2017 (0.3 m 3 d −1 m −1 of shoreline) to ~ 20 cm d −1 in July and was negligible in the summer months thereafter due to a decreasing hydraulic gradient. Seawater circulation in the swash‐zone varied from 10 to 52 cm d −1 (0.4–2.1 m 3 d −1 m −1 ), driven by short‐term changes in the prevailing wind and wave regimes. Both flow paths supply minor dissolved silica fluxes on the order of ~ 3–10 mmol Si d −1 m −1 . Lagoon–sea water exchange supplies a net dissolved inorganic carbon (DIC) flux (320–1100 mmol C d −1 m −1 ) two orders of magnitude greater than seawater circulation and may impact coastal ocean acidification. The subterranean flow of water through sand barriers represents a significant source of new DIC, and potentially other solutes, to the Mediterranean Sea during high lagoon water‐level periods and should be considered in seasonal element budgets. Article in Journal/Newspaper Ocean acidification Wiley Online Library Swash ENVELOPE(-67.524,-67.524,-67.581,-67.581) Limnology and Oceanography 64 5 2059 2080 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract The subterranean flow of water through sand barriers between coastal lagoons and the sea, driven by a positive hydraulic gradient, is a net new pathway for solute transfer to the sea. On the sea side of sand barriers, seawater circulation in the swash‐zone generates a flux of recycled and new solutes. The significance and temporal variability of these vectors to the French Mediterranean Sea is unknown, despite lagoons constituting ~ 50% of the coastline. A one‐dimensional 224 Ra ex / 223 Ra reactive‐transport model was used to quantify water flow between a coastal lagoon (La Palme) and the sea over a 6‐month period. Horizontal flow between the lagoon and sea decreased from ~ 85 cm d −1 during May 2017 (0.3 m 3 d −1 m −1 of shoreline) to ~ 20 cm d −1 in July and was negligible in the summer months thereafter due to a decreasing hydraulic gradient. Seawater circulation in the swash‐zone varied from 10 to 52 cm d −1 (0.4–2.1 m 3 d −1 m −1 ), driven by short‐term changes in the prevailing wind and wave regimes. Both flow paths supply minor dissolved silica fluxes on the order of ~ 3–10 mmol Si d −1 m −1 . Lagoon–sea water exchange supplies a net dissolved inorganic carbon (DIC) flux (320–1100 mmol C d −1 m −1 ) two orders of magnitude greater than seawater circulation and may impact coastal ocean acidification. The subterranean flow of water through sand barriers represents a significant source of new DIC, and potentially other solutes, to the Mediterranean Sea during high lagoon water‐level periods and should be considered in seasonal element budgets. |
author2 |
Agence Nationale de la Recherche European Commission |
format |
Article in Journal/Newspaper |
author |
Tamborski, Joseph van Beek, Pieter Rodellas, Valentí Monnin, Christophe Bergsma, Erwin Stieglitz, Thomas Heilbrun, Christina Cochran, J. Kirk Charbonnier, Céline Anschutz, Pierre Bejannin, Simon Beck, Aaron |
spellingShingle |
Tamborski, Joseph van Beek, Pieter Rodellas, Valentí Monnin, Christophe Bergsma, Erwin Stieglitz, Thomas Heilbrun, Christina Cochran, J. Kirk Charbonnier, Céline Anschutz, Pierre Bejannin, Simon Beck, Aaron Temporal variability of lagoon–sea water exchange and seawater circulation through a Mediterranean barrier beach |
author_facet |
Tamborski, Joseph van Beek, Pieter Rodellas, Valentí Monnin, Christophe Bergsma, Erwin Stieglitz, Thomas Heilbrun, Christina Cochran, J. Kirk Charbonnier, Céline Anschutz, Pierre Bejannin, Simon Beck, Aaron |
author_sort |
Tamborski, Joseph |
title |
Temporal variability of lagoon–sea water exchange and seawater circulation through a Mediterranean barrier beach |
title_short |
Temporal variability of lagoon–sea water exchange and seawater circulation through a Mediterranean barrier beach |
title_full |
Temporal variability of lagoon–sea water exchange and seawater circulation through a Mediterranean barrier beach |
title_fullStr |
Temporal variability of lagoon–sea water exchange and seawater circulation through a Mediterranean barrier beach |
title_full_unstemmed |
Temporal variability of lagoon–sea water exchange and seawater circulation through a Mediterranean barrier beach |
title_sort |
temporal variability of lagoon–sea water exchange and seawater circulation through a mediterranean barrier beach |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1002/lno.11169 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11169 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11169 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11169 |
long_lat |
ENVELOPE(-67.524,-67.524,-67.581,-67.581) |
geographic |
Swash |
geographic_facet |
Swash |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Limnology and Oceanography volume 64, issue 5, page 2059-2080 ISSN 0024-3590 1939-5590 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lno.11169 |
container_title |
Limnology and Oceanography |
container_volume |
64 |
container_issue |
5 |
container_start_page |
2059 |
op_container_end_page |
2080 |
_version_ |
1809933544245428224 |