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RV Pelagia PE123
Cruise summary report
Cruise Info. | |||||||||||||||||||||||||||||||||||||
Ship name (ship code) | RV Pelagia (64PE) | ||||||||||||||||||||||||||||||||||||
Cruise identifier | PE123 | ||||||||||||||||||||||||||||||||||||
Cruise period | 1998-09-02 — 1998-09-18 | ||||||||||||||||||||||||||||||||||||
Status | Completed | ||||||||||||||||||||||||||||||||||||
Port of departure | Vigo, Spain | ||||||||||||||||||||||||||||||||||||
Port of return | Het Horntje, Netherlands | ||||||||||||||||||||||||||||||||||||
Objectives | OMEBEN-EXPEDITION. Projects OMEX-II, ALIPOR and BENGAL.
To study the distribution and activity of sea floor communities off NW Spain and the sediment concentrations of organic matter and biomarkers. Revisited 3 stations: the 2200m OMEX stations, the abyssal plain off La Coruna and Galicia Bank. Instruments that had been moored on a previous cruise were retrieved and re-deployed. Sediment samples at these and other locations were collected for spatial and temporal pigment biomarker variation. Visited a 4800m deep location on the Porcupine abyssal plain, temporal variation of the food supply and activity of the abyssal benthic community. A high resolution time series of measurements compiled of water column property and benthic community parameters. The respiratory activity of the benthic community is measured in-situ by bottom landers. 5 bottom landers deployed and took sediment and bottom-water samples. 2 hauls were made with a underwater video-trawl which filmed the sea floor and yielded tissue samples of holothurians for biochemical parameter analysis. At each station a CTD profile of the water column and bottom water samples were collected for oxygen determination. 10 litres of bottom water were filtered for phytopigment analysis. Sediment samples were collected with a multi-corer for the analysis of: phytopigments, oxygen porewater profiles and porosity. Sediment community oxygen consumption (SCOC) was measured in-situ with the ALBEX bottom lander. The ALBEX lander carries a sediment trap with built-in fluorometer. Megafauna was collected and the small-scale topography of the sea floor was recorded with a video-Agassiz trawl. | ||||||||||||||||||||||||||||||||||||
Chief scientist | Gerard C A Duineveld (Royal Netherlands Institute for Sea Research) | ||||||||||||||||||||||||||||||||||||
Cruise report | (0.14 MB) | ||||||||||||||||||||||||||||||||||||
Track charts | (0.07 MB) | ||||||||||||||||||||||||||||||||||||
Measurements | |||||||||||||||||||||||||||||||||||||
Physical oceanography | |||||||||||||||||||||||||||||||||||||
CTD stations | Quantity: number of profiles = 8 Description: CTD, depth range: 2261-4908m | ||||||||||||||||||||||||||||||||||||
Chemical oceanography | |||||||||||||||||||||||||||||||||||||
Other chemical oceanographic measurements | Quantity: number of deployments = 1 Description: Aquaflow, depth range: surface. | ||||||||||||||||||||||||||||||||||||
Biology and fisheries | |||||||||||||||||||||||||||||||||||||
Sediment traps | Quantity: number of deployments = 1 Description: PPS3 sediment trap, depth range: 4908m | ||||||||||||||||||||||||||||||||||||
Geology and geophysics | |||||||||||||||||||||||||||||||||||||
Dredge | Quantity: number of hauls = 4 Description: Agassiz-video trawl, depth range: 2446-4909m | ||||||||||||||||||||||||||||||||||||
Core - soft bottom | Quantity: number of cores = 2 Description: circular box-corer, depth range: 1153-1707m | ||||||||||||||||||||||||||||||||||||
Core - soft bottom | Quantity: number of cores = 12 Description: multi-corer, depth range: 2266-4926m | ||||||||||||||||||||||||||||||||||||
Core - soft bottom | Quantity: number of cores = 1 Description: square box-corer, depth range: 1103-1310m | ||||||||||||||||||||||||||||||||||||
Bottom photography | Quantity: number of hauls = 4 Description: Agassiz-video trawl, depth range: 2446-4909m | ||||||||||||||||||||||||||||||||||||
In-situ seafloor measurement/sampling | Quantity: number of deployments = 7 Description: ALBEX bottom lander, depth range: 2262-4909m | ||||||||||||||||||||||||||||||||||||
In-situ seafloor measurement/sampling | Quantity: number of deployments = 2 Description: recruitment lander, depth range: 780m | ||||||||||||||||||||||||||||||||||||
Data held at BODC | Get data | ||||||||||||||||||||||||||||||||||||
Series/Profiles | |||||||||||||||||||||||||||||||||||||
2 Bottle station | Reference numbers Vertical spatial coordinates Quality control flags Chlorophyll pigment concentrations in water bodies Reference numbers Vertical spatial coordinates Quality control flags Chlorophyll pigment concentrations in water bodies
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8 CTD/STD cast | Transmittance and attenuance of the water column Salinity of the water column Temperature of the water column Vertical spatial coordinates Density of the water column Transmittance and attenuance of the water column Salinity of the water column Temperature of the water column Vertical spatial coordinates Density of the water column
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Discrete samples | |||||||||||||||||||||||||||||||||||||
2 Bottom Lander | Other fluxes between the bed and the water column Sedimentation flux of pigments in the water column | ||||||||||||||||||||||||||||||||||||
8 CTD frame plus rosette sampler | Transmittance and attenuance of the water column Salinity of the water column Temperature of the water column Dissolved oxygen parameters in the water column Density of the water column Chlorophyll pigment concentrations in water bodies | ||||||||||||||||||||||||||||||||||||
5 Multicorer | Phaeopigment concentrations in sediment Chlorophyll pigment concentrations in sediment |