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BODC Cruise Metadata Report for RRS Charles Darwin (74AB) cruise CD90

Introduction

This report collates information from the BODC cruise inventory and oceanographic databases. It presents

Cruise Inventory Information

Long name RRS Charles Darwin (74AB) cruise CD90
Short name CD90
Objectives and Narrative To carry out sea-trials of the new BRIDGE instrument for the detection, investigation and sampling of hydrothermal flumes - "BRIDGET".
Main aims:
1. To pressure-test "BRIDGET" to >3000m water depth.
2. To carry out sensor testing in a known hydrothermal area - the "RAINBOW" vent-field, 36deg 15'N, Mid-Atlantic Ridge.
3. To assess the manoeuvrability of the instrument when towed astern of the ship from the deep-tow conducting cable, in a transponder-navigated grid.
4. To obtain inter-calibration within a known hydrothermal plume between "BRIDGET", the RVS CTD-netherlometer-transmissometer array and the OSU "ZAPS" instrumented sled.
Ship RRS Charles Darwin
Departure Port Ponta Delgada, Portugal
Departure Date 1994-09-17
Arrival Port Ponta Delgada, Portugal
Arrival Date 1994-09-27
Principal Scientist(s) Christopher R German (Institute of Oceanographic Sciences Deacon Laboratory)
Responsible Organisation Institute of Oceanographic Sciences Deacon Laboratory
Associated Project(s) "BRIDGE" Community Research Project
IHB Sea Areas Visited North Atlantic Ocean
Marsden Squares Visited 112
Work Area Description "South Amar" and "Amar" segments, 36deg N, mid-Atlantic Ridge (South of Azores triple-junction)
Work Area Bounding Polygon 30N,40W; 40N,40W; 40N,30W; 30N,30W; 30N,40W
Southern Limit 30N
Northern Limit 40N
Western Limit 40W
Eastern Limit 30W

Cruise Inventory Datasets

Physical oceanography  
Bathythermograph Quantity: number of profiles = 16
Description: XBT drops with T5 and T7 probes. All data relayed to RN Hydrographic Office via RVS Barry.  
CTD stations Quantity: number of stations = 6
Description: Vertical profiles and tow-yo stations of the OSU "ZAPS-SLED" (CTD-nephelometer-transmissometer-ZAPS in situ Mn probe) in the "RAINBOW" hydrothermal plume.  
CTD stations Quantity: number of stations = 5
Description: Deep casts using NB Mk III cTD with Seatech transmissometer and Chelsea Instrument Mk II nephelometer. Data collected on down-casts.  
CTD stations Quantity: number of deployments = 6
Description: "BRIDGET" lowerings/tow-yos with CTD-nephelometer-transmissometer array through "RAINBOW" hydrothermal area.  
Transparency (eg transmissometer) Quantity: number of stations = 5
Description: Deep casts using NB Mk III cTD with Seatech transmissometer and Chelsea Instrument Mk II nephelometer. Data collected on down-casts.  
Transparency (eg transmissometer) Quantity: number of deployments = 6
Description: "BRIDGET" lowerings/tow-yos with CTD-nephelometer-transmissometer array through "RAINBOW" hydrothermal area.  
Transparency (eg transmissometer) Quantity: number of stations = 6
Description: Vertical profiles and tow-yo stations of the OSU "ZAPS-SLED" (CTD-nephelometer-transmissometer-ZAPS in situ Mn probe) in the "RAINBOW" hydrothermal plume.  
Water bottle stations Quantity: number of profiles = 3
Description: General oceanics multi-sampler rosette with 12 x 2.5 litre Niskin bottles employed to collect 3 x 12-bottle sample suites for TDMn analysis during "BRIDGET" tow-yos through the "RAINBOW" hydrothermal plume.  
Water bottle stations Quantity: number of stations = 2
Description: General oceanics multi-sampler rosette with 12 x 2.5 litre rosette used to collect 2 x 12 bottle profiles for TDMn analysis during CTD up-casts.  
Chemical oceanography  
Other chemical oceanographic measurements Quantity: number of stations = 6
Description: Vertical profiles and tow-yo stations of the OSU "ZAPS-SLED" (CTD-nephelometer-transmissometer-ZAPS in situ Mn probe) in the "RAINBOW" hydrothermal plume.  
Trace elements Quantity: number of stations = 2
Description: General oceanics multi-sampler rosette with 12 x 2.5 litre rosette used to collect 2 x 12 bottle profiles for TDMn analysis during CTD up-casts.  
Trace elements Quantity: number of profiles = 3
Description: General oceanics multi-sampler rosette with 12 x 2.5 litre Niskin bottles employed to collect 3 x 12-bottle sample suites for TDMn analysis during "BRIDGET" tow-yos through the "RAINBOW" hydrothermal plume.  

Cruise Inventory Mooring/Buoy Operations

No information on datasets is currently available

Summary of BODC Data Holdings for the Cruise

National Oceanographic Database

Summary

# Series Instrument Description Parameters
5 CTD/STD cast Salinity of the water column
Temperature of the water column
Vertical spatial coordinates

Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)

Full List

BODC Reference Instrument Description Date/Time Location  
474642 CTD/STD cast 1994-09-18 12:20Z 36° 22' N, 29° 40' W Click for more
474654 CTD/STD cast 1994-09-20 09:02Z 36° 16' N, 33° 52' W Click for more
474666 CTD/STD cast 1994-09-20 13:53Z 36° 15' N, 33° 53' W Click for more
474678 CTD/STD cast 1994-09-22 16:48Z 36° 15' N, 33° 53' W Click for more
474691 CTD/STD cast 1994-09-22 18:48Z 36° 16' N, 33° 53' W Click for more

Project Database

No data currently held for this cruise in the BODC Project Database

References

Track Charts

Track Chart

Reports

Cruise Report