Pan-European infrastructure for ocean & marine data management

Cruise Summary Report Inventory (CSR)

Cruise Summary Report of Pourquoi pas? Cruise MOMARSAT2017 (BSH Ref-No.: 20175798)

Pourquoi pas?
08.07.2017
28.07.2017
Horta, Portugal
Horta, Portugal
SARRADIN PIERRE-MARIE - IFREMER/EEP/ DEEP SEA ENVIRONMENT DEPARTMENT
CANNAT MATHILDE - Institute of Earth Physics of Paris
IFREMER / EEP / LEP-DEEP ENVIRONMENT LABORATORY
Institute of Earth Physics of Paris
North Atlantic Ocean
WEST EAST SOUTH NORTH
-32.3 -26.7 33.9 38.5
Dorsale médio Atlantique, champ hydrothermal Lucky Strike
 ›› GML track
EMSO - European Multidisciplinary Seafloor and Water Column Observatory / Istituto Nazionale di Geofisica e Vulcanologia - Sede di Bologna
The MoMARSAT cruise ensure annual maintenance of the EMSO-Azores observatory in the Lucky Strike hydrothermal field. This seafloor observatory has been operated since 2010 and aims to acquire >=10 years of time series on hydrothermal, tectonic and volcanic processes and the ecosystems of an active hydrothermal site on the Mid-Atlantic Ridge. It is part of the European EMSO (European Multidisciplinary Seafloor and water column Observatory) network, supported in France by the EMSO-FR MESR infrastructure which is led by Ifremer-CNRS collaboration and which is a component of the European FIXO3 Fixed point Open Ocean Observatory network.
The array has an observatory infrastructure stricto sensu: a buoy (BOREL) providing data transfer to a server on shore as well as communications with connected instruments, and two junction boxes (SEAMON) on the seabed which communicate acoustically with the surface buoy. The instruments are connected to these junction boxes. The array also includes autonomous instruments providing internal data storage. In its current configuration (after MOMARSAT 2017 maintenance) the observatory comprises a connected seismometer (OBS), a connected bottom pressure probe, a connected biological observation module (TEMPO - with an HDTV video camera and 4 projectors, temperature, oxygen, dissolved iron and turbidity sensors), 20 autonomous temperature probes for hydrothermal fluids and mixing zones, 3 autonomous current-meters set on the seabed, 1 generic EGIM module, 1 array of 4 hydrophones (Hydroctopus), 1 temperature and chlorinity sensor, 4 microbiological colonization units and an oceanographic mooring.
The 2017 cruise also made it possible to change the BOREL buoy in place since the beginning of the experiment (and whose mooring broke in April 2017) and to deploy a brand new autonomous prototype for sequential sampling of hydrothermal fluids (DEAFS).
In-situ measurements as well as fluid and biological samples were taken to complement the set of parameters and integrate a spatial component at each maintenance operation.
This year two significant experiments were also carried out: one experiment for a chronobiological study in the Bathymodiolus azoricus horse mussel and another to study the restoration of assemblages of this horse mussel after disturbance.
Maintenance operations included retrieving the BOREL-SEAMON infrastructure and connected instruments, reconditioning them on board, then redeploying them. Recovery and redeployment of autonomous instruments are done either during the ROV inter-dives for the oceanographic mooring or on dedicated ROV dives for other sensors and sampling. Experience gained from previous maintenance enabled an optimised cruise strategy to be proposed for 15 to 17 days in the zone, taking account of possible technical and meteorological hazards.
There are 31 people on the maintenance team, including 10 staff for the BOREL and SEAMON infrastructure and sensors and 21 scientific staff to operate the sensors and coordinate sampling. Coordination of maintenance operations and the initial use of data is ensured by Mathilde Cannat. Operations on board were led by two of the four experienced co-head scientists mobilised for the project (Pierre Marie Sarradin, Jérôme Blandin, Mathilde Cannat and Javier Escartin). Satellite-transmitted data are immediately available on an EMSO server (http://www.emso-fr.org). The team involves Ifremer (REM RTD and EEP), 5 INSU laboratories (IPGP, LOPS, OMP-GET, IUEM, and LIENs-la Rochelle), two Portuguese entities (University of Azores and University of Lisbon), and colleagues from the University of Washington in Seattle and the University of Bergen.
The study zone is part of Portugal's EEZ and a "Marine Protected Area" (OSPAR).
On this year's cruise, a team of artists and video makers took part in the framework of the Deep thoughts "arts and sciences" project whose objective is to create collaborative work between artists and scientist for a sho
meteorological packages
current meters
CTD
thermistor chains
underwater cameras
discrete water samplers
hydrophones
LAES AGATHE -  IFREMER / Dpt Technologicals Research and Development
ROMMEVAUX-JESTIN CELINE -  Institute of Earth Physics of Paris
SARRAZIN JOZÉE -  IFREMER / EEP / LEP-DEEP ENVIRONMENT LABORATORY
CANNAT MATHILDE -  Institute of Earth Physics of Paris
SARRADIN PIERRE-MARIE -  IFREMER/EEP/ DEEP SEA ENVIRONMENT DEPARTMENT
CHAVAGNAC VALÉRIE -  Universite de Toulouse III / Geosciences Environment Toulouse
Ana COLACO -  University of Azores, Department of Oceanography and Fisheries (IMAR network)

Summary of Measurements and Samples

PI Number Type Unit Type of measurement Description Reference date
A B06 Dissolved organic matter (inc DOC) Hydrothermal fluid / seawater gradient 08.07.2017
B B16 Benthic bacteria/micro-organisms + A Godfroy - Samples of substrates and chimneys 08.07.2017
C B18 Zoobenthos + A Colaço - Wildlife Samples 08.07.2017
A B71 Particulate organic matter (inc POC, PON) Hydrothermal fluid / seawater gradient 08.07.2017
PI Number Type Unit Type of measurement Description Reference date
A H21 Oxygen Hydrothermal fluid / seawater gradient 08.07.2017
A H28 pH + V Chavagnac - Hydrothermal fluid / seawater gradient 08.07.2017
A H30 Trace elements Hydrothermal fluid / seawater gradient 08.07.2017
A H33 Other dissolved gases + V Chavagnac - Hydrothermal fluid / seawater gradient 08.07.2017
F H74 Carbon dioxide Hydrothermal fluid / seawater gradient 08.07.2017
A H90 Other chemical oceanographic measurements + V Chavagnac - Hydrothermal fluid / seawater gradient 08.07.2017
PI Number Type Unit Type of measurement Description Reference date
A P02 Trace metals + V Chavagnac - Hydrothermal fluid / seawater gradient 08.07.2017
G P90 Other contaminant measurements + J. Sarrazin - On hydrothermal modioles 08.07.2017
PI Number Type Unit Type of measurement Description Reference date
E G08 Bottom photography + J. Sarrazin, M.Cannat 08.07.2017
E G27 Gravity measurements 08.07.2017
E G73 Single-beam echosounding 08.07.2017
D G90 Other geological/geophysical measurements OBS, Geodesy, fluid temperature, rock samples 08.07.2017
PI Number Type Unit Type of measurement Description Reference date
E M06 Routine standard measurements 08.07.2017
PI Number Type Unit Type of measurement Description Reference date
D D01 Current meters On the bottom 08.07.2017
E D05 Surface drifters/drifting buoys BOREL buoy 08.07.2017
E D71 Current profiler (eg ADCP) 08.07.2017
E D90 Other physical oceanographic measurements 08.07.2017
D 11 H10 stations CTD stations 08.07.2017
E H71 Surface measurements underway (T,S) 08.07.2017
C H72 Subsurface temperature measurements + T. Barreyre, F. Fontaine, M. Cannat 08.07.2017
A H73 Geochemical tracers (eg freons) + V Chavagnac - Hydrothermal fluid / seawater gradient 08.07.2017