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description Publicationkeyboard_double_arrow_right Other literature type , Article 2017 FrancePublisher:American Geophysical Union (AGU) Funded by:EC | JERICO, EC | GROOM, EC | PERSEUSEC| JERICO ,EC| GROOM ,EC| PERSEUSRobin Waldman; Marine Herrmann; Samuel Somot; Thomas Arsouze; Rachid Benshila; Anthony Bosse; Jérôme Chanut; Hervé Giordani; Florence Sevault; Pierre Testor;doi: 10.1002/2016jc012587
Winter 2012–2013 was a particularly intense and well‐observed Dense Water Formation (DWF) event in the Northwestern Mediterranean Sea. In this study, we investigate the impact of the mesoscale dynamics on DWF. We perform two perturbed initial state simulation ensembles from summer 2012 to 2013, respectively, mesoscale‐permitting and mesoscale‐resolving, with the AGRIF refinement tool in the Mediterranean configuration NEMOMED12. The mean impact of the mesoscale on DWF occurs mainly through the high‐resolution physics and not the high‐resolution bathymetry. This impact is shown to be modest: the mesoscale does not modify the chronology of the deep convective winter nor the volume of dense waters formed. It however impacts the location of the mixed patch by reducing its extent to the west of the North Balearic Front and by increasing it along the Northern Current, in better agreement with observations. The maximum mixed patch volume is significantly reduced from 5.7 ± 0.2 to 4.2 ± 0.6 × 1013 m313 m3 by the mesoscale. We also address the mesoscale impact on the ocean intrinsic variability by performing perturbed initial state ensemble simulations. The mesoscale enhances the intrinsic variability of the deep convection geography, with most of the mixed patch area impacted by intrinsic variability. The DWF volume has a low intrinsic variability but it is increased by 2–3 times with the mesoscale. We relate it to a dramatic increase of the Gulf of Lions eddy kinetic energy from 5.0 ± 0.6 to 17.3 ± 1.5 cm2/s2, in remarkable agreement with observations. International audience
Horizon / Pleins tex... arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2017Data sources: ArchiMer - Institutional Archive of IfremerJournal of Geophysical Research OceansArticle . 2017 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/2016jc012587&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 9 citations 9 popularity Average influence Average impulse Top 10% Powered by BIP!more_vert Horizon / Pleins tex... arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2017Data sources: ArchiMer - Institutional Archive of IfremerJournal of Geophysical Research OceansArticle . 2017 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/2016jc012587&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type , Article 2014 FrancePublisher:Springer Science and Business Media LLC Funded by:NWO | Part 1: An integrated stu..., EC | HERMIONENWO| Part 1: An integrated study of seepage through the seabed of the Nile deep-sea fan ,EC| HERMIONEDupré, Stéphanie; Mascle, Jean; Foucher, Jean-Paul; Harmegnies, François; Woodside, John; Pierre, Catherine;The Menes caldera is a fault-controlled depression (~8 km in diameter) at ~3,000 m water depth in the western province of the Nile deep-sea fan off NW Egypt, comprising seven mud volcanoes (MVs) of which two are active. Based on multichannel and chirp seismic data, temperature profiles, and high-resolution bathymetric data collected during the 2000 Fanil, 2004 Mimes and 2007 Medeco2 expeditions, the present study investigates factors controlling MV morphology, the geometry of feeder channels, and the origin of emitted fluids. The active Cheops and Chephren MVs are 1,500 m wide with subcircular craters at their summits, about 250 m in diameter, generally a few tens of metres deep, and filled with methane-rich muddy brines with temperatures reaching 42 °C and 57 °C respectively. Deployments of CTDs and corers with attached temperature sensors tracked these warm temperatures down to almost 0.5 km depth below the brine lake surface at the Cheops MV, in a feeder channel probably only a few tens of metres wide. Thermogenic processes involve the dissolution of Messinian evaporites by warm fluids likely sourced even deeper, i.e. 1.7 and 2.6 km below the seabed at the Cheops and Chephren MVs respectively, and which ascend along listric faults. Seepage activity appears broadly persistent since the initiation of mud volcanism in the Early Pliocene, possibly accompanied by lateral migration of feeder channels.
ArchiMer - Instituti... arrow_drop_down ArchiMer - Institutional Archive of Ifremer; Geo-Marine LettersOther literature type . Article . 2014ArchiMer - Institutional Archive of IfremerOther literature type . 2014Data sources: ArchiMer - Institutional Archive of Ifremeradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s00367-014-0367-1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 28 citations 28 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 14visibility views 14 download downloads 4 Powered bymore_vert ArchiMer - Instituti... arrow_drop_down ArchiMer - Institutional Archive of Ifremer; Geo-Marine LettersOther literature type . Article . 2014ArchiMer - Institutional Archive of IfremerOther literature type . 2014Data sources: ArchiMer - Institutional Archive of Ifremeradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s00367-014-0367-1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu
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description Publicationkeyboard_double_arrow_right Other literature type , Article 2017 FrancePublisher:American Geophysical Union (AGU) Funded by:EC | JERICO, EC | GROOM, EC | PERSEUSEC| JERICO ,EC| GROOM ,EC| PERSEUSRobin Waldman; Marine Herrmann; Samuel Somot; Thomas Arsouze; Rachid Benshila; Anthony Bosse; Jérôme Chanut; Hervé Giordani; Florence Sevault; Pierre Testor;doi: 10.1002/2016jc012587
Winter 2012–2013 was a particularly intense and well‐observed Dense Water Formation (DWF) event in the Northwestern Mediterranean Sea. In this study, we investigate the impact of the mesoscale dynamics on DWF. We perform two perturbed initial state simulation ensembles from summer 2012 to 2013, respectively, mesoscale‐permitting and mesoscale‐resolving, with the AGRIF refinement tool in the Mediterranean configuration NEMOMED12. The mean impact of the mesoscale on DWF occurs mainly through the high‐resolution physics and not the high‐resolution bathymetry. This impact is shown to be modest: the mesoscale does not modify the chronology of the deep convective winter nor the volume of dense waters formed. It however impacts the location of the mixed patch by reducing its extent to the west of the North Balearic Front and by increasing it along the Northern Current, in better agreement with observations. The maximum mixed patch volume is significantly reduced from 5.7 ± 0.2 to 4.2 ± 0.6 × 1013 m313 m3 by the mesoscale. We also address the mesoscale impact on the ocean intrinsic variability by performing perturbed initial state ensemble simulations. The mesoscale enhances the intrinsic variability of the deep convection geography, with most of the mixed patch area impacted by intrinsic variability. The DWF volume has a low intrinsic variability but it is increased by 2–3 times with the mesoscale. We relate it to a dramatic increase of the Gulf of Lions eddy kinetic energy from 5.0 ± 0.6 to 17.3 ± 1.5 cm2/s2, in remarkable agreement with observations. International audience
Horizon / Pleins tex... arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2017Data sources: ArchiMer - Institutional Archive of IfremerJournal of Geophysical Research OceansArticle . 2017 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/2016jc012587&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 9 citations 9 popularity Average influence Average impulse Top 10% Powered by BIP!more_vert Horizon / Pleins tex... arrow_drop_down ArchiMer - Institutional Archive of IfremerOther literature type . 2017Data sources: ArchiMer - Institutional Archive of IfremerJournal of Geophysical Research OceansArticle . 2017 . Peer-reviewedLicense: Wiley Online Library User AgreementData sources: Crossrefadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1002/2016jc012587&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type , Article 2014 FrancePublisher:Springer Science and Business Media LLC Funded by:NWO | Part 1: An integrated stu..., EC | HERMIONENWO| Part 1: An integrated study of seepage through the seabed of the Nile deep-sea fan ,EC| HERMIONEDupré, Stéphanie; Mascle, Jean; Foucher, Jean-Paul; Harmegnies, François; Woodside, John; Pierre, Catherine;The Menes caldera is a fault-controlled depression (~8 km in diameter) at ~3,000 m water depth in the western province of the Nile deep-sea fan off NW Egypt, comprising seven mud volcanoes (MVs) of which two are active. Based on multichannel and chirp seismic data, temperature profiles, and high-resolution bathymetric data collected during the 2000 Fanil, 2004 Mimes and 2007 Medeco2 expeditions, the present study investigates factors controlling MV morphology, the geometry of feeder channels, and the origin of emitted fluids. The active Cheops and Chephren MVs are 1,500 m wide with subcircular craters at their summits, about 250 m in diameter, generally a few tens of metres deep, and filled with methane-rich muddy brines with temperatures reaching 42 °C and 57 °C respectively. Deployments of CTDs and corers with attached temperature sensors tracked these warm temperatures down to almost 0.5 km depth below the brine lake surface at the Cheops MV, in a feeder channel probably only a few tens of metres wide. Thermogenic processes involve the dissolution of Messinian evaporites by warm fluids likely sourced even deeper, i.e. 1.7 and 2.6 km below the seabed at the Cheops and Chephren MVs respectively, and which ascend along listric faults. Seepage activity appears broadly persistent since the initiation of mud volcanism in the Early Pliocene, possibly accompanied by lateral migration of feeder channels.
ArchiMer - Instituti... arrow_drop_down ArchiMer - Institutional Archive of Ifremer; Geo-Marine LettersOther literature type . Article . 2014ArchiMer - Institutional Archive of IfremerOther literature type . 2014Data sources: ArchiMer - Institutional Archive of Ifremeradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s00367-014-0367-1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess Routesbronze 28 citations 28 popularity Top 10% influence Average impulse Top 10% Powered by BIP!visibility 14visibility views 14 download downloads 4 Powered bymore_vert ArchiMer - Instituti... arrow_drop_down ArchiMer - Institutional Archive of Ifremer; Geo-Marine LettersOther literature type . Article . 2014ArchiMer - Institutional Archive of IfremerOther literature type . 2014Data sources: ArchiMer - Institutional Archive of Ifremeradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.1007/s00367-014-0367-1&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu