Deutsches Ozeanographisches
Datenzentrum
Inventur der Maria S. Merian-Reise MSM36 (DOD-Ref-No.20140066)
Inventory of Maria S. Merian Cruise MSM36 (DOD-Ref-No.20140066)
Plattform Platform |
Reise-Nr. Cruise-No. |
Zeitraum Period |
Projekt Project |
Arbeitsgebiet Working area |
---|---|---|---|---|
Maria S. Merian | MSM36 | 18.02.2014 - 17.03.2014 | Alboran Sea Gulf of Cadiz NE Atlantic (Limit 40?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 | Malaga | Las Palmas |
Ziel der Reise / Objectives of Cruise:
The cruise MSM 36 started on the 18.02.14 in Malaga (Spain) and ended on the 17.03.14 in Las Palmas (Spain). It carried out multidisciplinary research on the long-term development of cold-water coral ecosystems in selected areas along the Moroccan continental margins in the Mediterranean Sea and in the Atlantic Ocean. The key instrument to be used during this expedition was the Bremen Deep Sea Drill Rig MeBo. With this instrument up to 70 m long sediment cores have been retrieved from cold-water coral mounds and adjacent settings in the two working areas. With the cores obtained, these three key hypotheses will be tested: (1) The Gibraltar-seesaw describing the last glacial maximum - Holocene development of cold-water corals along the Moroccan margins on both sides of the Strait of Gibraltar is a productivity-driven long-lasting feature spanning at least the last glacial-interglacial cycle. (2) The long-term development of the Moroccan cold-water coral mounds is characterised by a major change in growth pattern as proposed in mound development models and as proven for Challenger Mound off Ireland (from which the only long (>10 m) sedimentary record exists so far). (3) The initiations of the Moroccan cold-water coral mounds on each side of the Strait of Gibraltar are triggered by (the same?) major large-scale palaeo-environmental change(s). In the first working area, the Moroccan Mediterranean margin, a total of 5 MeBo cores reaching down to drilling depths of up to 70 m have been retrieved. These cores are accompanied by a total of 16 gravity cores. Both types of cores have been taken from coral mounds as well as from so-called off-mound sites. The latter are done to obtain undisturbed paleoceanographic records which will be link to the coral history to be reconstructed from the coral mound cores. In the second working area, the Moroccan Atlantic margin, a total of 6 MeBo cores reaching lengths down to drilling depths of up to 52 m have been retrieved. These cores are accompanied by a total of 6 gravity cores. In both working areas detailed hydro-acoustic surveys (multibeam echosounder, Parasound) have been conducted that formed the base for planning optimised coring operations with the MeBo and the gravity corer. Furthermore, CTD measurements have been done in both areas.
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 | deployment | G04 Core-soft bottom (no. of cores) |
Bremen deep sea drill rig MeBo, up tp 70 m long cores. | no |
MARUM | Hebbeln Dierk | 22 | deployment | G04 Core-soft bottom (no. of cores) |
gravity cores with either 6 or 12 m core barrel. | no |
MARUM | Hebbeln Dierk | 20 | survey | G73 Single-beam echosounding |
Parametric echosounding with PARASOUND. | yes |
MARUM | Hebbeln Dierk | 19 | survey | G74 Multi-beam echosounding |
multi-beam bathymetry (EM122, 1002) | yes |
MARUM | Hebbeln Dierk | 1 | n miles | G90 Other geological or geophysical measurements |
ADCP 75 kHz | yes |
MARUM | Hebbeln Dierk | 8 | deployment | H09 Water bottle stations |
water sampling for geochemistry. | no |
MARUM | Hebbeln Dierk | 14 | deployment | H10 CTD-Stations |
CTD casts. | 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 |