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Fisher R4 AR3_2004
Cruise summary report
| Cruise Info. | |
| Ship name | Fisher R4 |
| Cruise identifier | AR3_2004 |
| Cruise period | 2004-04-10 — 2004-04-14 |
| Status | Completed |
| Port of departure | Port-Saint-Louis-du-Rhône, France |
| Port of return | Port-Saint-Louis-du-Rhône, France |
| Purpose | Research |
| Objectives | ADCP, sidescan, sector-scanning, sediment profiling and 3D sonar surveys and water quality monitoring of the lower 7 km of the Rhône river, as well as the mouth area (delta top and delta front). Objectives were to gather information on river and bottom conditions prior to SED2 cruise deployments (13-16 April 2004). Poor weather conditions prevented surveying in the desired benthic lander and Valeport deployment sites for the SED2 cruise. Instead, ADCP transects made before the Dec. 2003 flood were repeated, and the extent of the saline intrusion was mapped.
This cruise was the fifth in a series planned for the Gulf of Lions (see also AR1-2003, FR1-2003, AR1-2004, AR2-2004) within Workpackage 1 (Shelf and River input systems) of the European Union FP5 project European Margin Strata Formation (EUROSTRATAFORM) (EVK3-CT-2002-00079). EUROSTRATAFORM objectives are to explore the fate of sediment particles from their source in rivers through to their deposition on shallow deltas, the continental shelf and deep sea basins. |
| Chief scientist | Carl L Amos (Southampton Oceanography Centre) |
| Project | EUROSTRATAFORM |
| Coordinating body | Challenger Division, SOC, Southampton, SO14 3ZH |
| Ocean/sea areas | |
| General | Mediterranean Sea |
| Specific | Gulf of Lions, northwest Mediterranean |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: track kilometres = 14.816 Description: Surface temperature measurements underway, single beam Lowrance echosounder 200kHz, surface water temperature, continuous recording, 10/04/04 to 12/04/04 |
| Current profiler (eg ADCP) | Quantity: track kilometres = 14.816 Description: ADCP current profiler, RDI 600 kHz Workhorse, depth to bottom and seabed morphology, continuous recording, 10/04/04, 14/04/04, 15/04/04 |
| Current profiler (eg ADCP) | Quantity: number of track lines = 23 Description: ADCP current profiler, RDI 600 kHz Workhorse, river discharge, 10/04/04, 14/04/04, 15/04/04 |
| Current profiler (eg ADCP) | Quantity: track kilometres = 14.816 Description: ADCP current profiler, RDI 600 kHz Workhorse, backscatter intensity, vertical profile, continuous recording, 10/04/04, 14/04/04, 15/04/04 |
| Current profiler (eg ADCP) | Quantity: track kilometres = 14.816 Description: ADCP current profiler, RDI 600 kHz Workhorse, current velocity, vertical profile, continuous recording, 10/04/04, 14/04/04, 15/04/04 |
| Contamination | |
| Suspended matter | Quantity: number of stations = 7 Description: Water bottle samples, water pump, bottom and surface water suspended matter concentrations, bottom and surface water temperature and salinity to examine extent of saline intrusion in river, 14/04/04, 15/04/04 |
| Geology and geophysics | |
| Single-beam echosounding | Quantity: track kilometres = 14.816 Description: Single beam echosounding, single beam Lowrance echosounder 200kHz, depth to bottom, continuous recording, 10/04/04 to 12/04/04 |
| Long/short range side scan sonar | Quantity: track kilometres = 14.816 Description: High resolution sidescan sonar imaging, Marine Electronics 1640 500 kHz sidescan sonar (fan beam), surface backscatter, continuous recording, 10/04/04 to 12/04/04 |
| Other geological/geophysical measurements | Quantity: track kilometres = 14.816 Description: 3D sonar imaging, Marine Electronics 700 kHz 3D imaging sonar (pencil beam), surface backscatter, continuous recording, 10/04/04 to 12/04/04 |
| Moorings, landers, buoys | |
| Geology and geophysics | |
| Other geological/geophysical measurements | 43° 20' 58" N 4° 50' 5" E — River bed imaging, Marine Electronics profiling (fan beam) sonar 1MHz, Marine Electronics sector scanning (fan beam) sonar 675kHz, surface backscatter (bottom roughness measurements), 2 instruments on benthic tripod, realtime logging from vessel, 2.2 m water depth, deployed/recovered 14/04/04 |
| Other geological/geophysical measurements | 43° 21' 17" N 4° 50' 13" E — River bed imaging, Marine Electronics profiling (fan beam) sonar 1MHz, Marine Electronics sector scanning (fan beam) sonar 675kHz, surface backscatter (bottom roughness measurements), 2 instruments on benthic tripod, realtime logging from vessel, 7.7 m water depth, deployed/recovered 14/04/04 |
| Other geological/geophysical measurements | 43° 22' 39" N 4° 48' 43" E — River bed imaging, Marine Electronics profiling (fan beam) sonar 1MHz, Marine Electronics sector scanning (fan beam) sonar 675kHz, surface backscatter (bottom roughness measurements), 2 instruments on benthic tripod, realtime logging from vessel, 8.6 m water depth, deployed/recovered 14/04/04 |
| Other geological/geophysical measurements | 43° 22' 18" N 4° 49' 10" E — River bed imaging, Marine Electronics profiling (fan beam) sonar 1MHz, Marine Electronics sector scanning (fan beam) sonar 675Hz, surface backscatter (bottom roughness measurements), 2 instruments on benthic tripod, realtime logging from vessel, 4.8 m water depth, deployed/recovered 14/04/04 |
| Other geological/geophysical measurements | 43° 22' 24" N 4° 49' 30" E — River bed imaging, Marine Electronics profiling (fan beam) sonar 1MHz, Marine Electronics sector scanning (fan beam) sonar 675kHz, surface backscatter (bottom roughness measurements), 2 instruments on benthic tripod, realtime logging from vessel, 6.1 m water depth, deployed/recovered 14/04/04 |
