| Plattform Platform |
Reise-Nr. Cruise-No. |
Zeitraum Period |
Projekt Project |
Arbeitsgebiet Working area |
|---|---|---|---|---|
| Polarstern | ANT XXV/3 | 07.01.2009 - 17.03.2009 | LOHAFEX |
South Atlantic Ocean |
| Fahrtleiter Chief Scientist | Institut Institute | Auslaufhafen Port of departure | Einlaufhafen Port of return | Stationskarte Station map | Schiffsroute Trackchart |
|---|---|---|---|---|---|
| Smetacek V. | Alfred-Wegener-Institut fur Polar- und Meeresforschung | Cape Town | Punta Arenas |
Ziel der Reise / Objectives of Cruise:
Objectives and brief narrative of the cruise The aim of the cruise was to carry out the iron fertilization cruise LOHAFEX in a mesoscale eddy in the productive south-western Atlantic. The region north of the island of South Georgia was initially selected as altimeter images of sea surface height indicate it to be a region of regular eddy formation. However, the eddies there were not found to be suitable as they lacked closed cores, so the ship returned to an eddy at 48?S; 15?W which clearly had one. On 27th January a 300 km2 patch in the centre of the core was fertilized with 2 tonnes of dissolved iron (10 tonnes of granular FeSO4). The processes occurring in the patch were followed for 39 days with interdisciplinary measurements of physical, chemical and biological parameters; in between the patch was re-fertilized with an additional 2 tonnes of dissolved iron after 18 days. The ship left the patch on 6th March for Punta Arenas.
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 | Smetacek V. | 80 | stations | B01 Primary productivity |
CTD profiles | no |
| AWI | Smetacek V. | 18 | stations | B09 Zooplankton |
RMT net hauls | no |
| AWI | Smetacek V. | 21 | stations | B09 Zooplankton |
WP2 net vertical hauls | no |
| AWI | Smetacek V. | 37 | stations | B09 Zooplankton |
Multinet vertical hauls | no |
| AWI | Smetacek V. | 18 | stations | B11 Nekton |
RMT net hauls | no |
| MPIMHB | Fuchs Bernhard M. | 5 | stations | G04 Core-soft bottom (no. of cores) |
Multi-corer (MUC), sediment surface samples | no |
| AWI | Smetacek V. | 80 | stations | H01 Continuous temperature recording (Surface) |
CTD profiles | no |
| AWI | Smetacek V. | 80 | stations | H02 Continuous salinity recording (Surface) |
CTD profiles | no |
| AWI | Smetacek V. | 80 | stations | H09 Water bottle stations |
CTD profiles | no |
| AWI | Smetacek V. | 80 | stations | H10 CTD-Stations |
CTD profiles | no |
| AWI | Smetacek V. | 80 | stations | H11 Sub-surface measurements underway (T, S) |
CTD profiles | no |
| AWI | Smetacek V. | 80 | stations | H21 Oxygen |
CTD profiles | no |
| AWI | Smetacek V. | 80 | stations | H22 Phosphates |
CTD profiles | no |
| AWI | Smetacek V. | 80 | stations | H24 Nitrates |
CTD profiles | no |
| AWI | Smetacek V. | 80 | stations | H26 Silicates |
CTD profiles | no |
| AWI | Smetacek V. | 80 | stations | H27 Alkalinity |
CTD profiles | no |
| AWI | Smetacek V. | 80 | stations | H32 Isotopes |
CTD profiles | no |
| AWI | Smetacek V. | 80 | stations | H71 Surface measurements underway (T, S) |
CTD profiles | no |
| AWI | Smetacek V. | 80 | stations | H74 Carbon dioxide |
CTD profiles | no |
| AWI | Smetacek V. | 80 | stations | H76 Ammonia |
CTD profiles | no |