EMSO-Azores, maintenance cruises

MoMARsat2019, from 7th of June to the 4th of July 2019

This year, the maintenance cruise took place on board the PP? and for the first time, the under-water operations were performed with the inhabited submersible Nautile.

The 35 scientists, engineers and technicians (IFREMER, CNRS, UBO, IMAR-Pt) worked 24/7. During day time, the dives with the submersible aimed to refurbish the infrastructure, to complete the datasets with in situ measurements, fluid, faunal and microbial samples. The exploration of the turbulence patterns and the geochemical signature of Lucky Strike hydrothermal plume were carried out during night shift.

MoMARSAT 2019 was quite successful and totalized 19 dives with the Nautile, over 35 VMP profiles (Vertical Microstructure Profiler) and 49 CTD casts (conductivity and temperature).

Learn more...

SARRADIN Pierre-Marie, LEGRAND Julien (2019) MOMARSAT2019 cruise, RV Pourquoi pas ?, https://doi.org/10.17600/18001110

MoMARsat2018, from the 8th to the 28th of August 2018

The deployment of the EGIM and DEAFS were successful. The EGIM Essential Ocean Variables (temperature, conductivity, pressure, dissolved O2, turbidity, ocean currents and ocean noise) are available for download.

The team had to leave the site knowing that there would be no near real time transmission with SEaMon East. No impact on the data series as the in-situ WIFI connection showed the system working perfectly.

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CANNAT Mathilde (2018) MOMARSAT2018 cruise, RV L'Atalante, https://doi.org/10.17600/18000514

MoMARsat2017, from the 8th to the 28th July 2017

In addition of the usual maintenance of the seabed stations and instrumentations, the team recovered FixO3 TransNational Access mooring line, deployed two new instruments (EMSO Generic Instrumental Module propotype and DEAFS) and replaced the relay buoy. The former buoy was succesfully recovered.

A very busy three-week cruise aboard the R/V Pourquoi Pas?...

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SARRADIN Pierre-Marie, CANNAT Mathilde (2017) MOMARSAT2017 cruise, RV Pourquoi pas ?, https://doi.org/10.17600/17000500

April 2016, Transmission from the seafloor stopped

Although in perfect condition at the time of the previous maintenance, the mooring of the relay buoy could not withstand the 2 year deployment at sea. As a consequence, the real time data transmission from the seafloor stations stopped.

MoMARsat2016, from the 27th August to the 12th of September 2016

The team successfully achieved a major upgrade of the observatory. The second generation of electronic core, COSTOF2 replaced the previous equipment. The observing capacity has been doubled and a series of new sensors was deployed: a video camera with improved image quality, a 100 thermistor string, an array of four hydrophones.

Thanks to the financial support of FixO3 Trans National Access, “Deepcorr”, a monitoring line dedicated to corrosion experiments was deployed on the site.

Learn more...

CANNAT Mathilde, SARRADIN Pierre-Marie (2016) MOMARSAT2016 cruise, RV L'Atalante, https://doi.org/10.17600/16001200 

MoMARsat2015, from the 9th to the 30th of April 2015

SARRADIN Pierre-Marie, CANNAT Mathilde (2015) MOMARSAT2015 cruise, RV Pourquoi pas ?, https://doi.org/10.17600/15000200

The videos produced during the submersible dives are available on the Marine science video portal.

Blog (French)

MoMARsat2014, from the 13th to 31th of July 2014

The cruise was carried out on board the Pourquoi pas? with ROV Victor for the maintenance and exploration submarine operations.

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SARRADIN Pierre-Marie, CANNAT Mathilde (2014) MOMARSAT2014 cruise, RV Pourquoi pas ?, https://doi.org/10.17600/14000300

The videos produced during the submersible dives are available on the Marine science video portal.

MoMARsat2013, from the 23th of August to the 7th of September 2013

Third annual maintenance operations on the EMSO-Azores observatory with a new sensor deployed on top of a small hydrothermal spire called AISICS chimney: CISICS (Connected In Situ Instrumented Colonizing System) is dedicated to microbial colonization, fluids and microbial sampling and temperature records.

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BLANDIN Jérôme, SARRADIN Pierre-Marie, CANNAT Mathilde (2013) MOMARSAT2013 cruise, RV Pourquoi pas ?, https://doi.org/10.17600/13030040

The videos produced during the submersible dives are available on the Marine science video portal.

MoMARsat2012, from the 10th to 25th of July 2012

A specific sampling started this year, focussing on the crab Segonzacia mesatlantica and the shrimps Mirocaris fortunate: specimens will be maintained alive in pressurized aquaria and provided to Oceanopolis in Brest for the "Abyss box" exhibition (collaboration between Oceanopolis, Univ. Paris Sorbonne (UPMC) and Ifremer, involving IMAR DOP).

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CANNAT Mathilde, SARRADIN Pierre-Marie (2012) MOMARSAT2012 cruise, RV Thalassa, https://doi.org/10.17600/12040050

The videos produced during the submersible dives are available on the Marine science video portal.

MoMARsat2011, from the 29th June to the 23th July 2011

First maintenance work on the "standalone" observatory EMSO-Azores.

EMSO-Azores observatory is to be maintained on a yearly basis during the Momarsat cruise. The observatory components are recovered, serviced on board and redeployed, using a submarine vehicule. Beyond the maintenance work, samplings of rocks, fluids and organisms, the colonization experiments and the video surveys of vents and habitats are performed during the cruise. They provide critical background to the time-series acquired over the year: contribution to the data quality control, extention of the range of parameters studied and improvement of the spatial resolution.

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CANNAT Mathilde, BLANDIN Jérôme, SARRADIN Pierre-Marie (2011) MOMARSAT2011 cruise, RV Pourquoi pas ?, https://doi.org/10.17600/11030070

The videos produced during the submersible dives are available on the Marine science video portal.

MoMARsat2011 web site (French)

MoMARsat2010, from the 1st to the 16th of October 2010

Led jointly by Ifremer and the IPGP-CNRS/INSU, the research cruise MoMARsat2010 aboard the R/V Pourquoi pas? aimes to deploy an array of oceanographic instruments which will continuously monitor the active hydrothermal processes on the Lucky Strike vent field. 

The site is located on the Mid-Atlantic Ridge offshore the Azores, in the center of one of the most volcanically active segment of the ridge. This monitoring offers a high probability of capturing evidence for volcanic events, observing interactions between faulting, magmatism, hydrothermal circulations and, evaluating their impacts on the ecosystem.

MoMARsat2010 is  one of the demonstration missions of the European ESONET programme that is developing a network of deep-sea observatories.

Learn more...

SARRADIN Pierre-Marie, BLANDIN Jérôme, ESCARTIN Javier (2010) MOMARSAT2010 cruise, RV Pourquoi pas ?, https://doi.org/10.17600/10030100

MoMARsat2010 web site