Deutsches Ozeanographisches
Datenzentrum Inventur der Meteor-Reise M107 (DOD-Ref-No.20140064)
Inventory of Meteor Cruise M107 (DOD-Ref-No.20140064)

Plattform
Platform
Reise-Nr.
Cruise-No.
Zeitraum
Period
Projekt
Project
Arbeitsgebiet
Working area
Meteor M107 29.05.2014 - 03.07.2014 SFB 754
 
Tropical NE Atlantic  

Fahrtleiter
Chief Scientist
Institut
Institute
Auslaufhafen
Port of departure
Einlaufhafen
Port of return
Stationskarte
Station map
Schiffsroute
Trackchart
Sommer Stefan Helmholtz Centre for Ocean Research Kiel (GEOMAR) Fortaleza Las Palmas   

Ziel der Reise / Objectives of Cruise:

Objectives Oxygen Minimum Zones (OMZ) are key regions for the biogeochemical cycling of major elements. The major goal of this cruise was to advance our understanding of how the OMZ off Mauritania is maintained and to determine potential feedbacks of benthic nutrient release on the currently expanding Mauritanian OMZ. Specific objectives were: a. to determine variability of benthic nutrient release in response to hydrodynamic forcing and the bottom water redox scheme; b. to quantify diapycnal and advective fluxes; c. to investigate microbial processes involved in the sediment and the water column N, Fe, and P cycles; d. to study the influence of viruses on pelagic biogeochemical processes; e. to study the distribution of trace metals. Narrative At the 28th May a group of scientists was boarding the RV Meteor to prepare loading and to organize the visit of the vice-minister from the BMBF Dr. Thomas Rachel and representatives of the Brazilian German embassy. Prof. Dr. P. Brand and Dr. S. Sommer reported about their research activities. In the evening a reception took place hosting the vice-minister, Brazilian politicians and scientists as well as members of the Brazilian DAAD. Departure was at Saturday 31st May at 11:00 local time. The transit across the Atlantic lasted until the 08th June when we reached Nouakchott and Mr. Mamadou Ba the Mauritanian observer (IMROP) came on board. During the transit outside the Brazilian EEZ various underway measurements were conducted, a tow fish was deployed to sample surface waters. The thermosalinograph recorded surface water temperature and salinity. Additionally, the water column was hydrographically investigated using an underway-CTD. These measurements were supplemented by current measurements using the shipboard ADCP and continuous pCO2 measurements of the surface water. The scientific team was interdisciplinary ranging from physical oceanography deploying CTD/water sampling rosette, microstructure CTD, glider, and moorings to benthic and pelagic biogeochemistry as well as microbiology and virology. Benthic biogeochemistry and microbiology involved the deployment of the benthic observatory BIGO to measure solute fluxes and a multiple corer to retrieve sediments for porewater analyses. Pelagic biogeochemistry relied on casts of the CTD water sampling rosette and the trace metal CTD. Furthermore, in situ pumps were deployed for tracer geochemistry. Until the 15th June research activities focused on a depth transect in the southern working area at 18?20'N. This area comprised 7 major stations in water depths of 1095, 787, 412, 236, 171, 91, and 47 m but for physical and biogeochemical measurements was extended to a water depth of 2200 m. At the beginning of this first working period moorings as well as the benthic observatories were anchored at the seafloor in water depths of 356, 164, 91 and 41 m to synoptically record the current regime. In the following days, the benthic observatories BIGO I and BIGO II as well as the TV-MUC were deployed. Benthic works were predominantly conducted during the daytime, whereas the water column was mostly studied during the night comprising the deployment of a CTD water sampling rosette, microstructure CTD and a trace metal CTD. The CTD water-sampling rosette was subsampled for measuring nutrients, N P fixation rates as well as DOM and partially nitrogen stable isotopes. Samples of the Trace Metal CTD were analysed for trace metals. For the analysis of radiotracers in situ pumps were deployed at all major stations. Three glider for measurements of physical parameters, oxygen, nitrate and microstructure were deployed along the depth transect. Lastly a profiling lander was deployed to conduct in situ voltammetric measurements in the sediment. This lander was further equipped with a "lab on a chip" for time series nitrate measurements.

Messungen / Measurements

Institut
Institute
Wissenschaftler
Scientist
Anzahl
Number
Einheit
Unit
Typ der Messungen
Type of measurements
Kommentar
Comments
Daten im DOD
Data in DOD
GEOMAH Engel Anja 3 deployment B73
Sediment traps
Drifting sediment traps. 30.05.2014 no
GEOMAH Dengler Marcus 1 survey D71
Current profiler (e.g. ADCP)
Shipboard ADCP measurements. 30.05.2014 no
GEOMAH Dengler Marcus 278 profiles D90
Other physical oceanographic measurements
Turbulence measururements. 30.05.2014 no
GEOMAH Dale Andrew 22 deployment G04
Core-soft bottom (no. of cores)
Multicorer cass for sediment biogeochemical analyses . 30.05.2014 no
GEOMAH Sommer Stefan 3 deployment G71
In-situ sea floor measurements
Benthic in situ measurements of voltammetric profiles, nitrate and physical parameters. 30.05.2014 no
GEOMAH Sommer Stefan 9 deployment G71
In-situ sea floor measurements
Benthic in situ measurements of fluxes, biogeochemistry. 30.05.2014 no
GEOMAH Sommer Stefan 1 n miles G90
Other geological or geophysical measurements
ADCP 38 + 75 kHz yes
GEOMAH Sommer Stefan 306 stations H00
Stations
- yes
GEOMAH Engel Anja 6 profiles H09
Water bottle stations
Virology at selected CTD stations. 30.05.2014 no
GEOMAH Engel Anja 73 profiles H09
Water bottle stations
Measurement of DOC, DOP, Phytoplankton, Bacteria. 30.05.2014 no
GEOMAH Schlosser Christian 10 profiles H09
Water bottle stations
Trace metal measurements. 30.05.2014 no
MPIMHB Lavik Gaute 21 profiles H09
Water bottle stations
Microbiology measurements at selected CTD stations. 30.05.2014 no
GEOMAH Sommer Stefan 73 profiles H09
Water bottle stations
Nutrient measurements at selected CTD stations. 30.05.2014 no
GEOMAH Dengler Marcus 73 deployment H10
CTD-Stations
CTD casts for the measurement of physical parameters. 30.05.2014 no
GEOMAH Sommer Stefan 1 stations H10
CTD-Stations
- yes
GEOMAH Dengler Marcus 218 profiles H11
Sub-surface measurements underway (T, S)
Subsurface measurments of physical parameters. 30.05.2014 no
IAEAMO Gasser Beat 17 deployment H73
Geochemical tracers (e.g. freons)
Radiotracer measurements. 30.05.2014 no
GEOMAH Sommer Stefan 1 n miles H80
Other physical measurements
Underway measurements during the whole trip such as coordinates, depth, meteorological parameter and so on yes
GEOMAH Dale Andrew 1 Exp H90
Other chemical oceanographic measurements
Ex situ onboard whole core incubations. 30.05.2014 no

Verankerungen / Moorings

Institut
Institute
Wissenschaftler
Scientist
Typ der Messungen
Type of measurements
Kommentar
Comments
geogr.Breite
Latitude
geogr.Länge
Longitude
Daten im DOD
Data in DOD
GEOMAH Dengler Marcus D90 APEX float 01 18° 0.0' N 17° 12.0' W no
GEOMAH Dengler Marcus D90 Glider Ifm02 (p, T, S, chla, turbidity, oxygen) 18° 30.0' N 17° 5.0' W no
GEOMAH Dengler Marcus D90 Glider Ifm03 (p, T, S, chla, turbidity, oxygen, CDOM) 18° 12.0' N 16° 45.0' E no
GEOMAH Dengler Marcus D90 Glider Ifm07 (p, T, S, chla, turbidity, oxygen, CDOM) 18° 13.0' N 16° 39.0' W no
GEOMAH Dengler Marcus D90 Glider Ifm12 (p, T, S, chla, turbidity, oxygen, CDOM) 18° 13.0' N 16° 39.0' W no
GEOMAH Dengler Marcus D90 Glider Ifm13 (p, T, S, chla, turbidity, oxygen, nitrate) 18° 10.0' N 16° 36.0' W no
GEOMAH Dengler Marcus D90 Lander (DOS) for current measurements 18° 14.0' N 16° 27.0' W no
GEOMAH Dengler Marcus D90 Lander (SLM1) for the measurement of oceanographical parameters (current, CTD) 18° 16.0' N 16° 19.0' W no
GEOMAH Dengler Marcus D90 Mooring (KPO 1118)for the measurement of oceanographical parameters (current, CTD) 18° 12.0' N 16° 35.0' W no
GEOMAH Dengler Marcus D90 Mooring (KPO 1119) for the measurement of currents 18° 13.0' N 16° 31.0' W no
GEOMAH Dengler Marcus D90 Mooring (KPO1121) for the measurement of oceanographical parameters (current, CTD) 19° 55.0' N 17° 33.0' W no
23.3.2024