RRS Charles Darwin CD73
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Charles Darwin (74AB) |
| Cruise identifier | CD73 |
| Cruise period | 1992-09-30 — 1992-10-26 |
| Status | Completed |
| Port of departure | Funchal, Portugal |
| Port of return | Ponta Delgada, Portugal |
| Purpose | Research |
| Objectives | This was the third of four scheduled mooring cruises planned for this experiment. The purpose of this cruise was to recover and redeploy five surface moorings deployed in February 1992 as part of the ONR funded ASTEX and Subduction experiments. In conjunction with the mooring work, a series of 59 CTD stations were made and water samples taken to be analysed for tritium levels, salinity and dissolved oxygen content. Hourly XBTs and meteorological observations were also made. |
| Chief scientist | Richard P Trask (Woods Hole Oceanographic Institution Department of Physical Oceanography) |
| Project | Subduction experiment |
| Coordinating body | ONR, USA |
| Cruise report |  (0.81 MB) |
| Ocean/sea areas | |
| General | North East Atlantic Ocean (limit 40W) |
| Specific | Eastern north Atlantic |
| Track charts | (0.37 MB) |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: activity duration in days = 25 Description: 5m depth |
| Bathythermograph | Quantity: number of profiles = 200 Description: hourly XBTs on transit between moorings, T-7 probes |
| Water bottle stations | Quantity: number of stations = 59 Description: Salinity only |
| CTD stations | Quantity: number of stations = 59 Description: NBIS CTD, typically to 500m, some to 1000m and 2000m |
| Current meters | Quantity: number of stations = 5 Description: surface moorings recovered & redeployed |
| Chemical oceanography | |
| Oxygen | Quantity: number of stations = 59 |
| Oxygen | Quantity: number of stations = 59 Description: NBIS CTD, typically to 500m, some to 1000m and 2000m |
| Trace elements | Quantity: number of stations = 59 Description: helium and tritium |
| Meteorology | |
| Routine standard measurements | Quantity: activity duration in days = 25 Description: hourly |
| Moorings, landers, buoys | |
| Physical oceanography | |
| Current meters | 17° 58' 0" N 22° 3' 0" W — SE, 8 months durn. redep 7 Oct 1992 |
| Current meters | 25° 31' 59" N 28° 55' 59" W — C, 8 months durn. redep 15 Oct 1992 |
| Current meters | 33° 1' 59" N 21° 58' 59" W — NE, 8 months durn. redep 2 Oct 1992 |
| Current meters | 18° 6' 0" N 33° 53' 59" W — SW, 8 months durn, redep 11 Oct 1992 |
| Current meters | 32° 53' 59" N 33° 53' 59" W — NW, 8 months durn. redep 24 Oct 1993 |
