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Ancient Hydrocarbon Seeps (2022)

Kaim, Andrzej ; Cochran, J. Kirk ; Landman, Neil H.

Cham : Springer International Publishing | Cham : Imprint: Springer

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Schlagwort(e): Physical geography. ; Paleoecology. ; Evolution (Biology). ; Geochemistry. ; Meeressediment ; Hydrothermalquelle ; Cold Seep ; Fossil ; Fossile Tiere ; Paläontologie ; Meeresökosystem ; Fossil ; Geoökosystem ; Palökologie ; Kohlenwasserstoffe

Beschreibung / Inhaltsverzeichnis: Chapter 1-Introduction -- Chapter 2-Biogeochemical processes -- Chapter 3-Taphonomy and diagenesis of seeps -- Chapter 4-Biota -- Chapter 5-Seeps around the world -- Chapter 6-Seeps as ecosystems -- Chapter 7-Evolution of seep communities over geological time -- Chapter 8-Cognate communities.

Materialart: Online-Ressource

Seiten: 1 Online-Ressource(XVII, 687 p. 129 illus., 71 illus. in color.)

Ausgabe: 1st ed. 2022.

ISBN: 9783031056239

Serie: Topics in Geobiology 50

URL: https://doi.org/10.1007/978-3-031-05623-9

DOI: 10.1007/978-3-031-05623-9

Sprache: Englisch

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Temporal variability of lagoon–sea water exchange and seawater circulation through a Mediterranean barrier beach (2019)

Tamborski, Joseph ; Beek, Pieter ; Rodellas, Valentí ; [weitere]

ASLO (Association for the Sciences of Limnology and Oceanography) | Wiley

In: Limnology and Oceanography, 64 (5). pp. 2059-2080.

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Publikationsdatum: 2022-01-31

Beschreibung: 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 Ra-224(ex)/Ra-223 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.

Materialart: Article , PeerReviewed

Format: text

DOI: 10.1002/lno.11169

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