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 |