DEFLO-HYDRO

Type Oceanographic cruise
Ship Marion Dufresne
Ship owner TAAF
Dates 03/01/2008 - 02/05/2008
Chief scientist(s) ROYER Jean-Yves ORCID, BRACHET Cédric

GEO-OCEAN - UMR 6538

Univ. Brest, CNRS, Ifremer, Univ. Bretagne Sud

Place Nicolas Copernic

29280 Plouzané

https://www.geo-ocean.fr/
DOI 10.17600/18000740
Objective

DEFLO-HYDRO (observation of DEFormation of the ocean Lithosphere using HYDROphones) is a continuous hydroacoustic project lasting more than one year (12-18 months) to observe seismic activity in the Indian Ocean. For this project, 3 autonomous hydrophones were submerged in the SOFAR channel for 14 months between the Reunion, Kerguelen and Amsterdam islands. They were deployed during the MD157 cruise (Oct 2006). They were retrieved during two missions in January 2008 (MD165-VT95) and April 2008 (OP2008/1). The proposed system was configured to ensure continuous acoustic monitoring of 3 ridges with different opening rates (16 to 70 mm/year) and of the intra-plate deformation in the south of the Central Indian basin. The approach is particularly effective in detecting and locating low magnitude seismicity (>2.5) which is not caught by seismological arrays on land and in distinguishing events of tectonic or magmatic events. The objectives were to characterize the functioning over time and space of 3 ultra-slow, slow and intermediate ridges, to specify the distribution over time and space of intra-plate deformations and to check the presence of low magnitude foreshocks before major earthquakes on active subsea faults. This observatory will also be used to detect the acoustic activity of marine mammals, and particularly large whales. It falls under the DEFLO-HYDRO project.

Published data

Leroy Emmanuelle C, Royer Jean-Yves, Bonnel Julien, Samaran Flore (2017). Inter- and intra-annual frequency variations of large-whale calls in the southern Indian ocean. https://doi.org/10.17882/51007


Leroy Emmanuelle C., Royer Jean-Yves, Bonnel Julien, Samaran Flore (2016). Antarctic blue whales in the southern Indian Ocean: a multi-year and multi-site database of Z-call detections. https://doi.org/10.17882/46124


Bibliography

Publications

Leroy Emmanuelle C, Royer Jean-Yves, Bonnel Julien, Samaran Flore (2018). Long-Term and Seasonal Changes of Large Whale Call Frequency in the Southern Indian Ocean. Journal Of Geophysical Research-oceans, 123(11), 8568-8580. Publisher's official version : https://doi.org/10.1029/2018JC014352 , Open Access version : https://archimer.ifremer.fr/doc/00516/62730/


Leroy Emmanuelle C., Thomisch Karolin, Royer Jean-Yves, Boebel Olaf, Van Opzeeland Ilse (2018). On the reliability of acoustic annotations and automatic detections of Antarctic blue whale calls under different acoustic conditions. Journal Of The Acoustical Society Of America, 144(2), 740-754. https://doi.org/10.1121/1.5049803


Leroy Emmanuelle, Samaran Flore, Bonnel Julien, Royer Jean-Yves (2017). Identification of two potential whale calls in the southern Indian Ocean, and their geographic and seasonal occurrence. Journal Of The Acoustical Society Of America, 142(3), 1413-1427. https://doi.org/10.1121/1.5001056


Royer J. -Y., Chateau R., Dziak R. P., Bohnenstiehl D. R. (2015). Seafloor seismicity, Antarctic ice-sounds, cetacean vocalizations and long-term ambient sound in the Indian Ocean basin. Geophysical Journal International, 202(2), 748-762. Publisher's official version : https://doi.org/10.1093/gji/ggv178 , Open Access version : https://archimer.ifremer.fr/doc/00351/46249/


Jacob Jensen, Dyment Jerome, Yatheesh V. (2014). Revisiting the structure, age, and evolution of the Wharton Basin to better understand subduction under Indonesia. Journal Of Geophysical Research-solid Earth, 119(1), 169-190. https://doi.org/10.1002/2013JB010285


Samaran Flore, Stafford Kathleen M., Branch Trevor A., Gedamke Jason, Royer Jean-Yves, Dziak Robert P., Guinet Christophe (2013). Seasonal and Geographic Variation of Southern Blue Whale Subspecies in the Indian Ocean. Plos One, 8(8), e71561. Publisher's official version : https://doi.org/10.1371/journal.pone.0071561 , Open Access version : https://archimer.ifremer.fr/doc/00274/38490/


References of Technical Reports

Royer, J.-Y., 2008, Rapport de mission du projet Deflo-Hydro : déploiement et récupération d'un réseau d'hydrophones dans l'océan Indien (octobre 2006 - avril 2008): Brest, France, Institut Polaire Paul Emile Victor, 47 p.

References of International Seminar Communications

Goslin, J., Perrot, J., Royer, J.-Y., Guennou, C., D'Eu, J.-F. & Brachet, C., 2010. Hydroacoustic signals from autonomous hydrophone arrays: a powerful tool for long-term monitoring of active processes along spreading ridges and deforming areas at regional scales. in NERIES- ESONET OBS-Marine Seismology workshop, Paris.

Samaran F, 2010. Passive acoustic Monitoring of Blue Whale populations in Indian Ocean Séminaire Scientifique de l?Université de l?état d?Oregon, NOAA, Newport, OR USA.

Samaran F., 2010 Passive acoustic Monitoring of Blue Whale populations in Indian Ocean. Séminaire Scientifique de l?Applied Acoustics Laboratory, Université de Washington, USA.

Samaran F., 2010. Passive acoustic Monitoring of Blue Whale populations in Indian Ocean Séminaire Scientifique du National Marine Mammal Laboratory, NOAA ; Washington, OR USA.

Chateau, R., Royer, J.-Y., Dziak, R.P., Bohnenstielh, D.W., Brandon, V., and Haxel, J.H., 2009, Hydroacoustic records of seafloor earthquakes, cryogenic sounds, and cetacean vocalizations in the Indian Ocean, EOS Trans. Am Geophys. Un.: San-Francisco, CA, American Geophysical Union.

Royer, J.-Y., Dziak, R.P., Delatre, M., Chateau, R., Brachet, C., Haxel, J.H., Matsumoto, H., Goslin, J., Brandon, V., Cansi, Y., Samaran, F., and Guinet, C., 2009b, Results from a 14 month hydroacoustic experiment in the Indian Ocean, ISS09: Vienna, CTBT Organization.

Royer, J.-Y., Dziak, R.P., Delatre, M., Chateau, R., Brachet, C., Haxel, J.H., Matsumoto, H., Goslin, J., Brandon, V., and Bohnenstielh, D.W., 2009a, Results from a 14 month hydroacoustic monitoring of the three mid-oceanic ridges in the Indian Ocean, Volume 11: Geophysical Research Abstracts: Vienna, European Geophysical Union, Abstract EGU2009-8341.

Samaran F., Adam O. and Guinet C. 2009. ear-round records in the South Western Indian Ocean reveal a mid-ocean sympatric area of southern blue whale subspecies. 18th Biennal Marine Mammal Conference, Québec, Canada.

Samaran F., Adam O., Guinet C, 2009. Acoustic localization of blue whale (Balaenopera musculus) using the hydrophones of the International Monitoring System. 4th International Workshop on Detection and Localization of Marine Mammals using Passive Acoustics, Pavia, Italie.

Samaran, F., Adam, O., Ruzié, G., Stafford, K. and Guinet, C, 2009. Using IMS hydroacoustic data to monitor whales in the South-western Indian Ocean. Poster, International Scientific Conference (ISS09), Vienne, Autriche.

Brandon, V., Royer, J.-Y., Reymond, D., Hyvernaud, O., and Cansi, Y., 2008, Investigation for seismic precursors along fracture zones in the Indian Ocean using hydroacoustic data, Volume 89: EOS Trans. AGU, Fall Meet. Suppl.: San-Francisco, American Geophysical Union, Abstract T51B-1887.

Dziak, R.P., Royer, J.-Y., Haxel, J.H., Delatre, M., Bohnenstielh, D.W., Matsumoto, H., Goslin, J., Brachet, C., and Lau, T.-K., 2008, Hydroacoustic detection of recent (large-scale) seafloor volcanic activity in the Southern Indian Ocean, Volume 89: EOS Trans. AGU, Fall Meet. Suppl.: San-Francisco, American Geophysical Union, Abstract T51B-1888.

Royer, J.-Y., Dziak, R.P., Delatre, M., Brachet, C., Haxel, J.H., Matsumoto, H., Goslin, J., Brandon, V., Bohnenstielh, D.W., Guinet, C., and Samaran, F., 2008, Preliminary results from an hydroacoustic experiment in the Indian Ocean, Volume 89: EOS Trans. AGU, Fall Meet. Suppl.: San-Francisco, American Geophysical Union, Abstract T51B-1883.

References of National Seminar Communications

Samaran F., Adam O., Ruzié G., Royer J.-Y., Guinet C, 2008. Long-term acoustic monitoring in the southern Indian Ocean reveals occurrence patterns of 4 species or subspecies of endangered baleen whales. Monitoring Strategies for Marine Mammal Populations, La Rochelle.

References of Contracts reports (European Union, FAO, Convention, Collectivities...)

Samaran F. & C. Guinet, 2010, Observatoire Acoustique des Grands Cétacés dans l?Océan Austral. Rapport d?étape pour la Fondation Total, 19p.

Thesis using campaign data

Ingale Vaibhav Vijay (2023). Dynamics of seafloor spreading from hydroacoustic analyses of seismic swarms along the three Indian Ocean ridges. PhD Thesis, Université de Bretagne Occidentale.


Leroy Emmanuelle (2017). Surveillance acoustique des baleines bleues Antarctique dans l’océan Indien austral : traitement, analyse et interprétation / Acoustic monitoring of Antarctic blue whales in the Southern Indian Ocean : data processing, analysis and interpretation. PhD Thesis, Université de Bretagne Occidentale.


Chateau, R., Précurseurs sismiques, Doctorat, Université de Brest, soutenance prévue en juillet 2013 (thèse interrompue temporairement).

Brandon, V., Déformation de la lithosphère océanique, Doctorat, Université de Brest, 11 octobre 2010.