| Plattform Platform |
Reise-Nr. Cruise-No. |
Zeitraum Period |
Projekt Project |
Arbeitsgebiet Working area |
|---|---|---|---|---|
| Alkor | 259 | 10.06.2005 - 22.06.2005 | North Sea |
| Fahrtleiter Chief Scientist | Institut Institute | Auslaufhafen Port of departure | Einlaufhafen Port of return | Stationskarte Station map | Schiffsroute Trackchart |
|---|---|---|---|---|---|
| Pfannkuche Olaf | Leibniz-Institut fur Meereswissenschaften an der Universitat Kiel | Kiel | Kiel |
Ziel der Reise / Objectives of Cruise:
The regulation of the benthic boundary layer methane turnover was studied in shallow gassy sediments in comparison to continental margins. The water column and seafloor was surveyed in the vicinity of active pockmarks and gassy sediments with hydro-acoustic methods and TV-cameras mounted to a towed frame, respectively. Surface sediment samples were taken by video guided multiple corer and van Veen grab in the vicinity of gas seeps and a gravity corer in meter scales. Methane in surface water was measured with an equilibrator system connected to a continuous water pumping device. Gas flux from discrete gas flares was quantified with an oblique multi-beam system integrated into a bottom lander, another one for faunal activity and benthic boundary layer processes. Station work focussed on the Tommeliten Gas Field, at a gas blow out and at the UK plot 15/25 in the Fladen Ground.
Messungen / Measurements
| Institut Institute |
Wissenschaftler Scientist |
Anzahl Number |
Einheit Unit |
Typ der Messungen Type of measurements |
Kommentar Comments |
Daten im DOD Data in DOD |
|---|---|---|---|---|---|---|
| IFMGEO | Pfannkuche Olaf | 4 | stations | B18 Zoobenthos |
Van Veen grab | no |
| IFMGEO | Pfannkuche Olaf | 9 | stations | B18 Zoobenthos |
Ocean Floor Observation system surveys, track lines (video films) | no |
| IFMGEO | Pfannkuche Olaf | 4 | stations | D90 Other physical oceanographic measurements |
Bottom Lander deployments, benthic boundary layer physics, activity, gas flux | no |
| IFMGEO | Pfannkuche Olaf | 4 | stations | G02 Grab |
Van Veen grab | no |
| IFMGEO | Pfannkuche Olaf | 2 | stations | G04 Core-soft bottom (no. of cores) |
Gravity corer (3m) | no |
| IFMGEO | Pfannkuche Olaf | 9 | stations | G08 Bottom photography |
Ocean Floor Observation system surveys, track lines (video films) | no |
| IFMGEO | Pfannkuche Olaf | 13 | stations | G74 Multi-beam echosounding |
Several profiles per station | no |
| IFMGEO | Pfannkuche Olaf | 4 | stations | G90 Other geological or geophysical measurements |
Bottom Lander deployments, benthic boundary layer physics, activity, gas flux | no |
| IFMGEO | Pfannkuche Olaf | 12 | stations | G90 Other geological or geophysical measurements |
Nutrients, oxidants in sediment profiles (Multicorer samples) | no |
| IFMGEO | Pfannkuche Olaf | 33 | stations | H10 CTD-Stations |
Vertical depth profiles | no |