| Plattform Platform |
Reise-Nr. Cruise-No. |
Zeitraum Period |
Projekt Project |
Arbeitsgebiet Working area |
|---|---|---|---|---|
| Meteor | M122 | 30.12.2015 - 31.01.2016 | SE Atlantic (Limit 20?W) |
| Fahrtleiter Chief Scientist | Institut Institute | Auslaufhafen Port of departure | Einlaufhafen Port of return | Stationskarte Station map | Schiffsroute Trackchart |
|---|---|---|---|---|---|
| Hebbeln Dierk | Universitat Bremen, Zentrum fur Marine Umweltwissenschaften | Walvis Bay | Walvis Bay |
Ziel der Reise / Objectives of Cruise:
The cruise M122 started on the 30.12.15 in Walvis Bay (Namibia) and ended in the same port on the 31.01.16. It carried out multidisciplinary research on the diversity and long-term development of cold-water coral ecosystems in selected areas along the Namibian and Angolan continental margins. For this expedition the following three core questions have been in the focus: (1) How large is the oxygen tolerance of cold-water corals in the oxygen minimum zones off Angola and Namibia? (2) How divers are these cold-water coral settings compared to other, better ventilated sites? (3) What controlled the long-term development of theses ecosystems from their initiation, through major climate changes up to the present day? To answer these questions two major target areas along the Namibian and Angolan continental margins have been investigated during expedition M122, both having been selected on the base of available hydroacoustic and seismic data, however, without any groundtruthing up to this expedition. For all working areas, station work started with a detailed hydro-acoustic mapping and seismic (multibeam echosounder, Parasound; multichannel seismics) which formed the base for planning optimised dives with an remotely operated vehicle (ROV). Extended video surveys with the ROV SQUID were used to characterise the facies and fauna and to identify most suited sampling sites. Based on this information, positions have been defined to conduct a dedicated sea floor sampling (gravity cores, box cores, grabs, water samples) and monitoring (CTD, benthic lander) programme within or in the direct vicinity of the observed cold-water coral settings. During previous expeditions this strategy has already been proven to be very successful in sampling cold-water coral material and data of their surrounding environment.
Messungen / Measurements
| Institut Institute |
Wissenschaftler Scientist |
Anzahl Number |
Einheit Unit |
Typ der Messungen Type of measurements |
Kommentar Comments |
Daten im DOD Data in DOD |
|---|---|---|---|---|---|---|
| MARUM | Hebbeln Dierk | 15 | stations | B18 Zoobenthos |
Boxcorer to collect seabed samples for sedimentology and benthos biology. | no |
| MARUM | Hebbeln Dierk | 16 | stations | B18 Zoobenthos |
Sea floor imaging and sampling by ROV. | no |
| MARUM | Hebbeln Dierk | 44 | stations | B18 Zoobenthos |
Grab sampler to collect seabed samples for sedimentology and benthos biology. | no |
| MARUM | Hebbeln Dierk | 15 | stations | G04 Core-soft bottom (no. of cores) |
Boxcorer to collect seabed samples for sedimentology and benthos biology. | no |
| MARUM | Hebbeln Dierk | 30 | stations | G04 Core-soft bottom (no. of cores) |
Gravity corer. | no |
| MARUM | Hebbeln Dierk | 44 | stations | G04 Core-soft bottom (no. of cores) |
Grab sampler to collect seabed samples for sedimentology and benthos biology. | no |
| MARUM | Hebbeln Dierk | 16 | stations | G08 Bottom photography |
Sea floor imaging and sampling by ROV. | no |
| MARUM | Hebbeln Dierk | 1 | survey | G74 Multi-beam echosounding |
Multibeam echosounding; continuously recorded during the whole cruise. | no |
| MARUM | Hebbeln Dierk | 1 | survey | G75 Single channel seismic reflection |
PARASOUND; continuously recorded during the whole cruise. | no |
| MARUM | Hebbeln Dierk | 93 | hour(s) | G76 Multichannel seismic reflection |
Multichannel seismics. | no |
| MARUM | Hebbeln Dierk | 1 | n miles | G90 Other geological or geophysical measurements |
EM 122, EM710, ADCP | yes |
| MARUM | Hebbeln Dierk | 163 | stations | H00 Stations |
- | yes |
| MARUM | Hebbeln Dierk | 44 | stations | H09 Water bottle stations |
Rosette water sampling. | no |
| MARUM | Hebbeln Dierk | 44 | stations | H10 CTD-Stations |
CTD (temperature, salinity, oxygen). | no |
| MARUM | Hebbeln Dierk | 1 | n miles | H80 Other physical measurements |
Underway measurements during the whole trip such as coordinates, depth, meteorological parameter and so on | yes |
| MARUM | Hebbeln Dierk | 1 | no unit | M90 Other meteorological measurements |
Analysen, Datenerfassung, Satelitenbilder, Trajektorien, Wetterberichte | yes |
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 |
|---|---|---|---|---|---|---|
| MARUM | Hebbeln Dierk | H10 | benthic lander deployed and recovered to collect hydrographic data over 14 days | 20° 44.0' S | 12° 49.0' E | no |
| MARUM | Hebbeln Dierk | H10 | benthic lander deployed and recovered to collect hydrographic data over 3 days | 9° 46.0' S | 12° 42.0' E | no |
| MARUM | Hebbeln Dierk | H10 | benthic lander deployed and recovered to collect hydrographic data over 3 days | 9° 44.0' S | 12° 42.0' E | no |
| MARUM | Hebbeln Dierk | H10 | benthic lander deployed and recovered to collect hydrographic data over 7 days | 9° 44.0' S | 12° 42.0' E | no |
| MARUM | Hebbeln Dierk | H10 | benthic lander deployed and recovered to collect hydrographic data over 7 days | 9° 43.0' S | 12° 44.0' E | no |
| MARUM | Hebbeln Dierk | H10 | benthic lander deployed and recovered to collect hydrographic data over 8 days | 20° 44.0' S | 12° 49.0' E | no |