Cruise inventory

FS Alkor AL436

Cruise plan

Cruise Info. 
Ship name (ship code)FS Alkor (06A6)
Cruise identifierAL436
Cruise period2014-05-01 — 2014-05-09
StatusCompleted
Port of departureKiel, Germany
Port of returnKiel, Germany
PurposeResearch
ObjectivesCruise ALKOR 436 is dedicated to the testing of a new flexible monitoring tool for environmental parameters such as off shore gas concentrations which is constructed and build in the framework of the German nationally funded project FlexMoT. For the testing of the first prototype a strong sea floor source of methane is required. The well site 22/4b in the British EEZ is such a place with a permanent gas flow from the sea floor to the atmosphere. The well site 22/4b has been intensively studied by our institution during previous research cruises with the German RV Alkor. During cruise AL 436 some short surveys with CTD/ water sampler and deployments of the FlexMoT observation system and a small lander for control measurements are planned. No permanent deployments of instruments are intended.

The water column and seafloor in the vicinity of the outcropping gas flare will be monitored with single beam echo-sounder and TV-cameras mounted to a towed frame, respectively. Water samples will be obtained from Rosette water sampler profiles for methane measurements (headspace analysis). A small bottom lander will be deployed for the residence time of the vessel to measure currents and methane at the sediment water interface. The new environmental observation instrument (a bottom frame) will be deployed and the integrated water column module which profiles the water column measuring methane
and CTD is tested. Some surficial sediment samples will be taken with a small multicorer.
Chief scientistOlaf Pfannkuche (Helmholtz Centre for Ocean Research, Kiel (East Shore Campus))
ProjectFlexMoT
Coordinating bodyGerman Ministry of Education and Research
Ocean/sea areas 
GeneralNorth Sea
SpecificAbandoned well location 22/4b (Position: 57.916N/01.633E).