Short-term evolution of submarine canyon head morphologies in the NW Mediterranean: Blanes and Cap de Creus canyons

Short-term evolution of submarine canyon head morphologies in the NW Mediterranean: Blanes and Cap de Creus canyons

European Geosciences Union (EGU) General Assembly, 19-30 Apr 2021.-- 2 pages.-- The authors wish to thank the Secretaría General de Pesca and Tragsa for the 2004 Espace Project dataset

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Bibliographic Details
Main Authors: Cabrera Molina, Cecilia, Durán, Ruth, Puig, Pere, Guillén, Jorge, Muñoz, Araceli, Demestre, Montserrat, Palanques, Albert
Other Authors: Agencia Estatal de Investigación (España)
Format: comunicación de congreso biblioteca
Language:English
Published: European Geosciences Union 2021-04-29
Online Access:http://hdl.handle.net/10261/259372
http://dx.doi.org/10.13039/501100011033
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100002809
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record_format koha
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
language English
description European Geosciences Union (EGU) General Assembly, 19-30 Apr 2021.-- 2 pages.-- The authors wish to thank the Secretaría General de Pesca and Tragsa for the 2004 Espace Project dataset
author2 Agencia Estatal de Investigación (España)
author_facet Agencia Estatal de Investigación (España)
Cabrera Molina, Cecilia
Durán, Ruth
Puig, Pere
Guillén, Jorge
Muñoz, Araceli
Demestre, Montserrat
Palanques, Albert
format comunicación de congreso
author Cabrera Molina, Cecilia
Durán, Ruth
Puig, Pere
Guillén, Jorge
Muñoz, Araceli
Demestre, Montserrat
Palanques, Albert
spellingShingle Cabrera Molina, Cecilia
Durán, Ruth
Puig, Pere
Guillén, Jorge
Muñoz, Araceli
Demestre, Montserrat
Palanques, Albert
Short-term evolution of submarine canyon head morphologies in the NW Mediterranean: Blanes and Cap de Creus canyons
author_sort Cabrera Molina, Cecilia
title Short-term evolution of submarine canyon head morphologies in the NW Mediterranean: Blanes and Cap de Creus canyons
title_short Short-term evolution of submarine canyon head morphologies in the NW Mediterranean: Blanes and Cap de Creus canyons
title_full Short-term evolution of submarine canyon head morphologies in the NW Mediterranean: Blanes and Cap de Creus canyons
title_fullStr Short-term evolution of submarine canyon head morphologies in the NW Mediterranean: Blanes and Cap de Creus canyons
title_full_unstemmed Short-term evolution of submarine canyon head morphologies in the NW Mediterranean: Blanes and Cap de Creus canyons
title_sort short-term evolution of submarine canyon head morphologies in the nw mediterranean: blanes and cap de creus canyons
publisher European Geosciences Union
publishDate 2021-04-29
url http://hdl.handle.net/10261/259372
http://dx.doi.org/10.13039/501100011033
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100002809
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AT puigpere shorttermevolutionofsubmarinecanyonheadmorphologiesinthenwmediterraneanblanesandcapdecreuscanyons
AT guillenjorge shorttermevolutionofsubmarinecanyonheadmorphologiesinthenwmediterraneanblanesandcapdecreuscanyons
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spelling dig-icm-es-10261-2593722022-04-22T11:37:12Z Short-term evolution of submarine canyon head morphologies in the NW Mediterranean: Blanes and Cap de Creus canyons Cabrera Molina, Cecilia Durán, Ruth Puig, Pere Guillén, Jorge Muñoz, Araceli Demestre, Montserrat Palanques, Albert Agencia Estatal de Investigación (España) European Commission Ministerio de Ciencia, Innovación y Universidades (España) Generalitat de Catalunya European Geosciences Union (EGU) General Assembly, 19-30 Apr 2021.-- 2 pages.-- The authors wish to thank the Secretaría General de Pesca and Tragsa for the 2004 Espace Project dataset Submarine canyons are morphological features found along continental margins that play a key role channeling and connecting sediment from continental shelves to the abyssal plains. The current morphological characterization of the Blanes and Cap de Creus canyon heads, located on the Catalan continental margin (NW Mediterranean Sea), has been recently conducted during the CRIMA cruise in September 2020 using high-resolution (4 m grid size) multibeam bathymetry data. These data have been compared with a previous dataset collected in 2004 during the ESPACE project to evaluate the morphological changes during this 16-year interval. Since these canyon heads are located at shallow water depths and at short distances from the shoreline, their short-term evolution is related to the sediment dynamics on the continental shelf. A large-scale change in the seafloor morphology was observed in the Blanes canyon head, indicating the prevalence of erosion in the western canyon rim and non-deposition in the eastern rim. In the Cap de Creus canyon head, the excavation of pre-existing erosive structures was also evidenced in the southwestern canyon rim. These changes mainly happen in the area where the shelf is narrower, which coincide with the main zone of dense water advection along the shelf and toward the canyon interior. The different small-scale morphological evolution between both canyon heads seems to be related to the local geological characteristic of the subsurface deposits of the continental shelf. The Blanes canyon head incises a succession of relict (Holocene) sediment bodies that can act as a source of erodible sediments to the canyon, mainly during strong storms. The continental shelf in the vicinity of the Cap de Creus canyon head, however, is characterized by a rocky substratum (Paleozoic) with a limited sediment coverage and numerous erosive features that evidence relative sand starvation. This creates a greater erosive resistance, although the erosive character of strong storms and major dense-shelf water cascading events occurring during the studied time interval is evident. Additionally, small changes in the shelf bedforms indicate that such high-energetic oceanographic processes also modify the fine-scale seafloor morphology. These results reveal that both submarine canyon heads are dynamic and sensitive to oceanographic processes that enhance the erosion and transport of sediment from the shelf into the canyon, particularly during energetic storms and dense shelf water cascading events. Nevertheless, their small-scale evolution seems to be closely related to the type of geological substrate of the shelf on which they are developing This study has received funding from the ABRIC (RTI2018-096434-B-I00) and CRIMA (RTI2018-095770-B-I00) Spanish Research Projects, the European Union's Horizon 2020 research and innovation programme under Marie Sklodowska-Curie grant agreement No. 867471 and the Generalitat de Catalunya (2017 SGR-663 and -1588). This work is contributing to the ICM’s ‘Center of Excellence’ Severo Ochoa (CEX2019-000928-S) Peer reviewed 2022-02-01T10:15:18Z 2022-02-01T10:15:18Z 2021-04-29 comunicación de congreso http://purl.org/coar/resource_type/c_5794 European Geosciences Union General Assembly (2021) http://hdl.handle.net/10261/259372 10.5194/egusphere-egu21-12286 http://dx.doi.org/10.13039/501100011033 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100002809 en #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO//RTI2018-096434-B-I00 info:eu-repo/grantAgreement/MINECO//RTI2018-095770-B-I00 info:eu-repo/grantAgreement/EC/H2020/867471 Publisher's version https://doi.org/10.5194/egusphere-egu21-12286 Sí open European Geosciences Union

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