RRS Charles Darwin CD84

Cruise summary report

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Cruise Info.

Ship name (ship code)

RRS Charles Darwin (74AB)

Cruise identifier

CD84

Cruise period

1994-01-18 — 1994-02-02

Status

Completed

Port of departure

Barry, United Kingdom

Port of return

Barry, United Kingdom

Purpose

Research

Objectives

1. To study the role of biogeochemical and hydrographic processes in controlling the distribution of dissolved trace metals in the shelf break region and adjacent waters, with due regard to temporal variability.
2. To estimate fluxes across trace metal fronts in the shelf break region and evaluate the use of trace metals as tracers of advective exchanges of waters at the shelf break.
3. Based on these and other OMEX data, to further the development of models for frontal exchange of dissolved trace metals and the linking of these models to a shelf seawater quality model.
4. In addition to the trace metal work, to collect other information and samples relevant to the aims of the OMEX project.

Chief scientist

Peter J Statham (University of Southampton Department of Oceanography)

Project

OMEX/MAST

Coordinating body

EC Project/ R. Wollast, ULB, Belgium

Cruise report

(1.18 MB)

Ocean/sea areas

General

Celtic Sea

Specific

Goban Spur to La Chappelle Bank

Track charts

Measurements

Physical oceanography

Surface measurements underway (T,S)

Description: underway thermosalinograph and fluorometer

CTD stations

Quantity: number of profiles = 20
Description: CTD with dissolved oxygen, transmissometer, and fluorometer. 10 casts with nephelometer and one with upwelling/downwelling PAR.

Transparency (eg transmissometer)

Quantity: number of profiles = 20
Description: CTD with dissolved oxygen, transmissometer, and fluorometer. 10 casts with nephelometer and one with upwelling/downwelling PAR.

Optics (eg underwater light levels)

Quantity: number of profiles = 20
Description: CTD with dissolved oxygen, transmissometer, and fluorometer. 10 casts with nephelometer and one with upwelling/downwelling PAR.

Chemical oceanography

Oxygen

Quantity: number of profiles = 20
Description: CTD with dissolved oxygen, transmissometer, and fluorometer. 10 casts with nephelometer and one with upwelling/downwelling PAR.

Oxygen

Quantity: number of profiles = 20
Description: CTD rosette for oxygen (Winkler)

Phosphate

Description: underway and CTD rosette samples for nutrients

Nitrate

Description: underway and CTD rosette samples for nutrients

Silicate

Description: underway and CTD rosette samples for nutrients

Radioactivity

Description: large volume radionuclide samples for 241-Am, 137-Cs, 239-Pu, 240-Pu, 238-Pu, 90-Sr

Other chemical oceanographic measurements

Quantity: number of samples = 4
Description: samples for HPLC pigments

Other chemical oceanographic measurements

Quantity: number of deployments = 3
Description: particle collection by in situ pump

Contamination

Suspended matter

Description: water samples for gravimetric SPM

Trace metals

Quantity: number of surveys = 1
Description: underway transect (Al)

Trace metals

Description: trace metal samples (Al, Fe, Mn, Cd, Co, Cu, Ni, Pb, Zn)

Biology and fisheries

Phytoplankton pigs (eg chlorophyll, fluorescence)

Quantity: number of profiles = 20
Description: CTD with dissolved oxygen, transmissometer, and fluorometer. 10 casts with nephelometer and one with upwelling/downwelling PAR.

Phytoplankton pigs (eg chlorophyll, fluorescence)

Quantity: number of profiles = 5
Description: HPLC pigments (upper 200m)

Phytoplankton pigs (eg chlorophyll, fluorescence)

Description: underway thermosalinograph and fluorometer

Dissolved organic matter (inc DOC)

Description: DOC and microzooplankton

Dissolved organic matter (inc DOC)

Quantity: number of samples = 8
Description: Dissolved organic carbon

Zooplankton

Description: DOC and microzooplankton

Geology and geophysics

Core - soft bottom

Quantity: number of cores = 3
Description: kasten & box cores

Moorings, landers, buoys

Physical oceanography

Current meters

49° 31' 59" N 11° 31' 0" W — current meter array; deployed 27 Jan 1994

Current meters

49° 7' 0" N 12° 10' 59" W — current meter array; deployed 21 Jan 1994

Current profiler (eg ADCP)

49° 22' 59" N 11° 40' 0" W — STABLE(benthic lander: near bottom currents and suspended matter) deployed 20 Jan 2317GMT and recovered 31Jan 0856GMT

Contamination

Suspended matter

49° 22' 59" N 11° 40' 0" W — STABLE(benthic lander:near bottom currents and suspended matter) deployed 20 Jan 2317GMT and recovered 31Jan 0856GMT

Data held at BODC

Get data

Series/Profiles

18 Bottle station

Reference numbers
Carotenoid and flavenoid pigment concentrations in water bodies
Phosphate concentration parameters in the water column
Vertical spatial coordinates
Nitrate concentration parameters in the water column
Phaeopigment concentrations in the water column
Chlorophyll pigment concentrations in water bodies
Quality control flags

[Show series]

[Hide series]

BODC id	Date/Time	Location
1282268	1994-01-28 17:09	47° 24' 50" N 7° 15' 25" W
1282300	1994-01-31 15:05	48° 54' 49" N 11° 50' 15" W
1686077	1994-01-20 11:30	49° 29' 5" N 11° 0' 10" W
1282348	1994-01-23 11:14	48° 56' 54" N 13° 39' 47" W
1686053	1994-01-26 09:47	49° 12' 22" N 12° 36' 2" W
1282336	1994-01-22 11:02	49° 6' 44" N 13° 11' 51" W
1282373	1994-01-25 09:31	49° 12' 53" N 12° 37' 15" W
1282385	1994-01-28 09:43	47° 24' 24" N 7° 15' 57" W
1282244	1994-01-26 09:47	49° 12' 22" N 12° 36' 2" W
1282256	1994-01-28 09:43	47° 24' 24" N 7° 15' 57" W
1282397	1994-01-28 17:09	47° 24' 50" N 7° 15' 25" W
1282293	1994-01-30 06:09	47° 29' 50" N 9° 34' 54" W
1686065	1994-01-28 17:09	47° 24' 50" N 7° 15' 25" W
1282312	1994-01-21 20:27	49° 6' 41" N 13° 12' 27" W
1282361	1994-01-24 04:03	48° 56' 15" N 13° 38' 51" W
1686089	1994-01-22 11:02	49° 6' 44" N 13° 11' 51" W
1282281	1994-01-30 01:19	47° 29' 36" N 9° 34' 2" W
1282324	1994-01-22 03:13	49° 4' 35" N 13° 17' 59" W

1 Bottom Lander (miscellaneous instruments)

Date and time
Temperature of the water column
Platform or instrument orientation
Horizontal velocity of the water column (currents)
Sea level

[Show series]

Date and time
Temperature of the water column
Platform or instrument orientation
Horizontal velocity of the water column (currents)
Sea level

[Hide series]

BODC id	Date/Time	Location	Doc.
444401	1994-01-20 23:16 — 1994-01-31 08:54	49° 23' 34" N 11° 40' 11" W

20 CTD/STD cast

Transmittance and attenuance of the water column
Dissolved oxygen parameters in the water column
Salinity of the water column
Temperature of the water column
Vertical spatial coordinates
Visible waveband radiance and irradiance measurements in the water column
Density of the water column
Raw suspended particulate material concentration sensor output

[Show series]

[Hide series]

BODC id	Date/Time	Location
884801	1994-01-20 17:54	49° 21' 55" N 11° 46' 57" W
884886	1994-01-26 11:08	49° 11' 41" N 12° 35' 28" W
884874	1994-01-26 09:29	49° 12' 22" N 12° 36' 1" W
884898	1994-01-27 00:28	48° 31' 50" N 11° 31' 9" W
884917	1994-01-28 16:43	47° 24' 50" N 7° 15' 25" W
884930	1994-01-29 23:45	47° 29' 37" N 9° 34' 3" W
884782	1994-01-20 10:03	49° 29' 48" N 11° 0' 11" W
884849	1994-01-23 09:23	48° 56' 53" N 13° 39' 47" W
884862	1994-01-25 08:55	49° 12' 53" N 12° 37' 15" W
884905	1994-01-28 08:55	47° 24' 24" N 7° 15' 57" W
884942	1994-01-30 05:35	47° 29' 51" N 9° 34' 54" W
884825	1994-01-22 02:34	49° 4' 35" N 13° 17' 59" W
884954	1994-01-30 14:22	48° 11' 4" N 10° 3' 38" W
884978	1994-01-31 14:29	48° 54' 49" N 11° 50' 15" W
884794	1994-01-20 11:12	49° 29' 5" N 11° 0' 10" W
884837	1994-01-22 10:42	49° 6' 44" N 13° 11' 51" W
884929	1994-01-29 05:09	47° 29' 32" N 7° 47' 40" W
884966	1994-01-31 09:56	49° 24' 19" N 11° 39' 45" W
884813	1994-01-21 19:14	49° 6' 41" N 13° 12' 28" W
884850	1994-01-24 03:26	48° 56' 15" N 13° 38' 51" W

3 Paddle wheel current meter

Moored instrument depth
Date and time
Temperature of the water column
Horizontal velocity of the water column (currents)

[Show series]

Moored instrument depth
Date and time
Temperature of the water column
Horizontal velocity of the water column (currents)

[Hide series]

BODC id	Date/Time	Location
444068	1994-01-22 20:00 — 1995-06-08 08:00	49° 6' 28" N 12° 10' 50" W
444044	1994-01-22 20:00 — 1995-06-08 08:00	49° 6' 28" N 12° 10' 50" W
444081	1994-01-22 20:00 — 1995-06-08 08:00	49° 6' 28" N 12° 10' 50" W

2 Pumped water sample

Horizontal spatial co-ordinates
Date and time
Carotenoid and flavenoid pigment concentrations in water bodies
Nitrate concentration parameters in the water column
Phaeopigment concentrations in the water column
Chlorophyll pigment concentrations in water bodies

[Show series]

[Hide series]

BODC id	Date/Time	Location	Doc.
1361996	1994-01-27 11:40 — 1994-02-01 17:30	47° 23' 48" N 11° 50' 34" W — 51° 12' 16" N 5° 7' 12" W
1659031	1994-01-26 09:27 — 1994-01-31 14:29	47° 29' 55" N 12° 36' 6" W — 49° 24' 14" N 9° 34' 46" W

Discrete samples

1 Bottom Lander

5 Box core

Amino acids in sediment
Mineralogical composition
Geological sample density
Geological sample radioactivity
Concentration of inorganic sulphur species in sediment
Sediment grain size parameters
Nitrogen concentrations in sediment
Inorganic chemical composition of sediment or rocks
Carbon concentrations in sediment

20 CTD frame plus rosette sampler

Transmittance and attenuance of the water column
Carotenoid and flavenoid pigment concentrations in water bodies
Dissolved oxygen parameters in the water column
Phosphate concentration parameters in the water column
Salinity of the water column
Temperature of the water column
Dissolved organic carbon concentration in the water column
Concentration of suspended particulate material in the water column
Visible waveband radiance and irradiance measurements in the water column
Microzooplankton non taxonomy-related biomass expressed as carbon per unit volume of the water column
Density of the water column
Microzooplankton generic abundance in water bodies
Nitrate concentration parameters in the water column
Phaeopigment concentrations in the water column
Chlorophyll pigment concentrations in water bodies
Dissolved metal concentrations in the water column

2 Instrument mooring

3 Kasten corer

Stable isotopes in sediment
Geological sample density
Geological sample magnetic, electrical and acoustic properties
Sediment water content, porosity and surface area
Sediment grain size parameters
Nitrogen concentrations in sediment
Carbon concentrations in sediment

3 Longhurst-Hardy Plankton Recorder

152 Sample taken from ship's non-toxic supply

Carotenoid and flavenoid pigment concentrations in water bodies
Salinity of the water column
Concentration of suspended particulate material in the water column
Microzooplankton non taxonomy-related biomass expressed as carbon per unit volume of the water column
Microzooplankton generic abundance in water bodies
Nitrate concentration parameters in the water column
Phaeopigment concentrations in the water column
Radioactivity in water bodies
Chlorophyll pigment concentrations in water bodies
Dissolved metal concentrations in the water column

2 Shipek grab

Sediment grain size parameters

5 Stand-alone pumps

Particulate metal concentrations in the water column
Carbon concentrations in suspended particulate material
Nitrogen concentrations in suspended particulate material
Metadata parameters

1 Underwater camera system

3 Water bottle hydrocast

Radioactivity in water bodies

Resources

RRS Charles Darwin CD84

Cruise summary report

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