| Plattform Platform |
Reise-Nr. Cruise-No. |
Zeitraum Period |
Projekt Project |
Arbeitsgebiet Working area |
|---|---|---|---|---|
| Polarstern | PS133-2 | 20.11.2022 - 19.12.2022 | CHANGING EARTH |
South Atlantic Ocean Southern Ocean |
| Fahrtleiter Chief Scientist | Institut Institute | Auslaufhafen Port of departure | Einlaufhafen Port of return | Stationskarte Station map | Schiffsroute Trackchart |
|---|---|---|---|---|---|
| Kasten Sabine | Alfred-Wegener-Institut fur Polar- und Meeresforschung | Punta Arenas | Cape Town |
Ziel der Reise / Objectives of Cruise:
The main goal of expedition PS133-2 "Island Impact" on board RV POLARSTERN was to understand the sources and transport pathways of iron (Fe), other nutrients (both macronutrients and trace elements/metals) and carbon compounds into the shelf waters of South Georgia and further downstream in the Southern Antarctic Circumpolar Current (ACC). We investigated the main island-derived (shelf) sources of Fe, nutrients and other trace elements including the impact of injection of these compounds by glacial melt water, groundwater seepage and methane bubble ebullition. Work also included the study of how methane seepage controls benthic faunal communities as well as material turnover and element fluxes. We further investigated how the local island-derived Fe and other potential Fe sources contribute to the downstream biogeochemistry and ecosystem structure in the Atlantic sector of the Southern Ocean. The expedition was and is supported by the Helmholtz Research Programme "Changing Earth - Sustaining our Future" Topic 2, Subtopics 1 and 4, Topic 4, Subtopic 1 and Topic 6, Subtopics 2 and 3.
Messungen / Measurements
| Institut Institute |
Wissenschaftler Scientist |
Anzahl Number |
Einheit Unit |
Typ der Messungen Type of measurements |
Kommentar Comments |
Daten im DOD Data in DOD |
|---|---|---|---|---|---|---|
| AWI | Krock Bernd | 12 | stations | B08 Phytoplankton |
Use of Apstein Plankton Net | no |
| AWI | Iversen Morten | 5 | stations | B08 Phytoplankton |
Deployment of WP2-net | no |
| AWI | Iversen Morten | 8 | stations | B73 Sediment traps |
Deployment of drifting sediment traps | no |
| BAS | Linse Katrin | 1 | stations | G01 Dredge |
Deploment of RAUSCHERT Dredge | no |
| AWI | Kasten Sabine | 19 | stations | G04 Core-soft bottom (no. of cores) |
Deployment of multiple corer (MUC) to sample undisturbed surface sediments | no |
| AWI | Kasten Sabine | 22 | stations | G04 Core-soft bottom (no. of cores) |
Deployment of gravity corer (GC) to collect long sediment cores | no |
| MARUM | Streuff Katharina | 2 | profiles | G73 Single-beam echosounding |
Surveys with PARASOUND | no |
| MARUM | Streuff Katharina | 2 | profiles | G73 Single-beam echosounding |
Transits and Surveys with EK80 | no |
| MARUM | Streuff Katharina | 4 | profiles | G74 Multi-beam echosounding |
Transits and Surveys with HYDROSWEEP DS3 | no |
| AWI | Kasten Sabine | 54 | stations | H00 Stations |
- | yes |
| AWI | Kasten Sabine | 7 | deployment | H09 Water bottle stations |
Deployment of ZODIACS to sample the water column with single hand-held niskin bottle as well as hand-held CTD and small hand-held gravity corer to sample the sediments. ZODIAC deployments were also used to bring small groups on shore to sample water, soil and vegetation in beach and near-shore environments. | no |
| AWI | Koch Florian | 9 | stations | H10 CTD-Stations |
Deployment of trace-metal clean CTD/Rosette system | no |
| AWI | von Appen Wilken-Jon | 28 | stations | H10 CTD-Stations |
Physical Oceanography CTD/Rosette System | no |
| AWI | Koch Florian | 2 | stations | H30 Trace elements |
Deployment of trace metal pump to collect large volumes of seawater for incubation experiments on board (plankton physiology, dependence on trace metal concentrations ) | no |
| AWI | Gentz Torben | 1 | stations | H33 Other dissolved gases |
Deployment of in situ underwater mass spectrometer to analyse dissolved methane concentrations in the water column | no |
| BAS | Linse Katrin | 16 | stations | M71 Atmospheric chemistry |
Air sampling by means of hand-held air pump for the analysis of methane concentrations | no |
| AWI | Iversen Morten | 2 | stations | P01 Suspended matter |
Deployment of MARINE SNOW CATCHER | no |
| AWI | Iversen Morten | 15 | stations | P01 Suspended matter |
Deployment of ROSINA Camera System to visualize marine particles/suspended matter | no |
| AWI | Geibert Walter | 3 | stations | P01 Suspended matter |
Deployment of in situ pumps | no |