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BODC Cruise Metadata Report for RRS Discovery (74E3) cruise D331T

Introduction

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

Cruise Inventory Information

Long name RRS Discovery (74E3) cruise D331T
Short name D331T
Objectives and Narrative This was the second cruise undertaken to the Mid-Atlantic Ridge as part of the NERC-funded consortium project (NE/C512961/1) entitled ECOMAR - Ecosystem of the Mid-Atlantic Ridge at the Sub-Polar Front and Charlie Gibbs Fracture Zone. ECOMAR - Ecosystem of the Mid-Atlantic Ridge at the Sub-Polar Front and Charlie Gibbs Fracture Zone.(http://www.oceanlab.abdn.ac.uk/ecomar/index.php)

ECOMAR forms part of the Census of Marine Life MAR-ECO project which is an international study of life in the northern mid-Atlantic Ocean with scientists from 16 nations participating in research of the waters around the mid-Atlantic Ridge from Iceland to the Azores (http://www.mar-eco.no). ECOMAR is focussed on patterns and processes in an area approximately half way between Iceland and the Azores in the vicinity of the Charlie-Gibbs Fracture Zone. The fracture zone represents a major discontinuity in the structure of the ridge but is also the latitude at which the north Atlantic current crosses the ridge from west to east delineating the position of the sub-polar front with cooler productive waters to the north and warmer more oligotrophic to the south. A voyage of the RV GO Sars in 2004 had indicated important differences in fauna across this boundary.

The first cruise in the ECOMAR series (JC 11) established a detailed bathymetric survey of the 4 sites, deployed long-term moorings at each ECOMAR site, and carried out a series of scientific surveys to build up an understanding of the physical, chemical, and biological characteristics of the area.

The second cruise (D331) in the ECOMAR series was meant to continue the detailed scientific survey work and recover, service and redeploy each of the long-term moorings. However, due to the Discovery's extended refit the second cruise was reduced to a trials cruise (D331T) with the specific objectives of:
- Recovering, servicing, and redeploying each of the four ECOMAR moorings situated at SE, SW, NE, & NW mooring sites;
- Recover, service and redeploy the DOBO Lander;
- Recover, and redeploy the ECOMAR Bathysnap Lander;
- Recover the PAP Bathysnap Lander;
- Perform winch trials.

Due to the reduction of D331 to a trials cruise, the remaining ECOMAR cruise programme will be altered to allow research cruises in summer 2009 (RRS James Cooke), and a further cruise in 2010 with the ISIS ROV (RRS James Cook).
Ship RRS Discovery
Departure Port Portland Harbour, United Kingdom
Departure Date 2008-07-24
Arrival Port St John, Canada
Arrival Date 2008-08-15
Principal Scientist(s) Philip Bagley (University of Aberdeen, Oceanlab)
Responsible Organisation University of Aberdeen, Oceanlab
Associated Project(s) ECOMAR
IHB Sea Areas Visited North Atlantic Ocean
Marsden Squares Visited 145/146/147/184/185/186
Work Area Description Mid-Atlantic Ridge around the Charlie Gibbs fracture zone
Work Area Bounding Polygon 40N,60W; 60N,60W; 60N,0E; 40N,0E; 40N,60W
Southern Limit 40N
Northern Limit 60N
Western Limit 60W
Eastern Limit 0E

Cruise Inventory Datasets

Physical oceanography  
CTD stations Quantity: number of profiles = 4
Description: One CTD taken at each of the 4 mooring locations prior to mooring deployment  

Cruise Inventory Mooring/Buoy Operations

Latitude Longitude Data type Description
54° 0' N 34° 10' W Current meters NE Mooring (Sediment traps, current meters, & ADCP)
53° 59' N 36° 7' W Current meters NW Mooring (Sediment traps & current meters)
49° 2' N 27° 43' W Current meters SE Mooring (Sediment trap & current meters)
48° 46' N 28° 38' W Current meters SW Mooring (Sediment trap & current meters)
54° 0' N 34° 10' W Current profiler (eg ADCP) NE Mooring (Sediment traps, current meters, & ADCP)
54° 1' N 34° 10' W Other biological/fisheries measurement NE Whale bone
53° 59' N 36° 12' W Other biological/fisheries measurement NW Whale bone
54° 0' N 34° 10' W Sediment traps NE Mooring (Sediment traps, current meters, & ADCP)
53° 59' N 36° 7' W Sediment traps NW Mooring (Sediment traps & current meters)
49° 2' N 27° 43' W Sediment traps SE Mooring (Sediment trap & current meters)
48° 46' N 28° 38' W Sediment traps SW Mooring (Sediment trap & current meters)

Summary of BODC Data Holdings for the Cruise

National Oceanographic Database

No data currently held for this cruise in the BODC National Oceanographic Database

Project Database

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

References

Track Charts

Track Chart

Reports

Cruise Report