RRS Discovery D200

Cruise summary report

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Cruise Info.

Ship name (ship code)

RRS Discovery (74E3)

Cruise identifier

D200

Cruise period

1993-02-06 — 1993-03-18

Status

Completed

Port of departure

Cape Town, South Africa

Port of return

Cape Town, South Africa

Objectives

1. To make direct measurements of the flow of deep and bottom waters passing eastwards from the Enderby Abyssal Plain to the Southern Indian Ocean via deep topographic daps to the northeast and southeast of the Kerguelen Plateau. Specifically, to lay two main arrays of current meters with 10 moorings (42 current meters) and 2 Bottom Pressure Recorders in the main gap between Crozet and Kerguelen, supplemented with a mooring in the deep cleft immediately to the west of Crozet Island, and a further 5 moorings in the Princess Elizabeth Trough between the Kerguelen Plateau and Antarctica.
2. To extend two of the moorings of the main Crozet-Kerguelen array up into the near surface layers to aid the subsequent SWINDEX investigation into the interactions of the Agulhas and Antarctic Circumpolar Currents.
3. To use a range of tracers including the CFCs 10, 11, 12, 113, inorganic nutrients, dissolved oxygen and oxygen and hydrogen isotopes (indicating meltwater content) to partition the deep throughflow into its constituent water masses and to identify these as to source using a widely-spaced set of upstream measurements.
4. To make discrete measurements of CO2 partial pressure in seawater, total seawater CO2 content (TCO2) and appropriate measures of biological activity throughout the cruise-track as a BOFS/PRIME component of the BAS Antarctic Special Topic, and as a necessary determinant of WOCE.
5. To make measurements of biogenic dimethylsulphide (DMS) and its precursor (DMSP) at regular intervals throughout the ship's track, as a component programme of the BAS Antarctic Special Topic.
6. To monitor a suite of discontinuous and continuous environmental variables throughout the cruise, including bathymetry from PES, XBT ADCP, multimet, wave recorder and thermosalinograph.
7. To use a range of satellite-derived ice and weather intelligence where possible and appropriate.
All these objectives were met in full with the exception of number 4.

Chief scientist

Robert R Dickson (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)

Project

ADOX/WOCE

Cruise report

(3.07 MB)

Ocean/sea areas

General

Indian Ocean
South East Atlantic Ocean (limit 20W)

Specific

Southern Ocean

Track charts

(0.12 MB)

Measurements

Physical oceanography

Surface measurements underway (T,S)

Quantity: activity duration in days = 40

Bathythermograph

Quantity: number of profiles = 138

CTD stations

Quantity: number of stations = 31

Current meters

Quantity: number of stations = 16
Description: 57 cms deployed

Current profiler (eg ADCP)

Quantity: activity duration in days = 40
Description: shipborne ADCP

Sea level (inc. bot. press., inverted echosounder)

Quantity: number of stations = 2
Description: 2 deployed

Chemical oceanography

Oxygen

Quantity: number of stations = 31
Description: 664 samples

Carbon dioxide

Quantity: activity duration in days = 40
Description: cont. pCO2

Carbon dioxide

Description: TCO2

Phosphate

Quantity: number of stations = 31
Description: 652 samples, also 269 surface samples

Nitrate

Quantity: number of samples = 269
Description: surface water samples

Nitrate

Quantity: number of stations = 31
Description: 652 samples

Silicate

Quantity: number of stations = 31
Description: 652 samples, also 269 surface samples

Isotopes

Quantity: number of samples = 690
Description: oxygen and hydrogen isotopes

Other chemical oceanographic measurements

Description: DMS and DMSP

Other chemical oceanographic measurements

Quantity: number of stations = 31
Description: CFC12, CFC11, CFC113, CFC10, CCl4

Contamination

Trace metals

Quantity: number of samples = 94
Description: Cadmium

Meteorology

Routine standard measurements

Quantity: activity duration in days = 40
Description: synoptic observations by ship's officers

Other meteorological measurements

Quantity: activity duration in days = 40
Description: wind,pressure,air temp, radiation,irradiance,lw radiation,wave height

Moorings, landers, buoys

Physical oceanography

Current meters

47° 23' 59" S 55° 36' 0" E — 4 meters deployed

Current meters

64° 22' 0" S 84° 40' 59" E — 3 meters deployed

Current meters

63° 30' 0" S 83° 55' 59" E — 3 meters deployed

Current meters

63° 55' 59" S 84° 17' 59" E — 3 meters deployed

Current meters

64° 49' 0" S 85° 7' 0" E — 2 meters deployed

Current meters

48° 34' 0" S 61° 30' 0" E — 2 meters deployed

Current meters

48° 22' 0" S 60° 28' 59" E — 3 meters deployed

Current meters

48° 10' 59" S 59° 37' 0" E — 4 meters deployed

Current meters

48° 0' 0" S 58° 37' 59" E — 3 meters deployed

Current meters

47° 45' 0" S 58° 1' 59" E — 8 meters deployed

Current meters

47° 36' 0" S 56° 47' 59" E — 4 meters deployed

Current meters

47° 7' 59" S 55° 6' 0" E — 7 meters deployed

Current meters

47° 1' 59" S 54° 4' 59" E — 4 meters deployed

Current meters

46° 49' 59" S 53° 19' 59" E — 3 meters deployed

Current meters

45° 25' 59" S 47° 58' 59" E — 2 meters deployed

Current meters

63° 2' 59" S 83° 34' 59" E — 2 meters deployed

Sea level (inc. bot. press., inverted echosounder)

46° 52' 0" S 53° 28' 0" E — 1 bottom pressure recorder deployed

Sea level (inc. bot. press., inverted echosounder)

48° 34' 59" S 61° 27' 0" E — 1 bottom pressure recorder deployed

Data held at BODC

Get data

Series/Profiles

26 Bottle station

Reference numbers
Phosphate concentration parameters in the water column
Vertical spatial coordinates
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Quality control flags

[Show series]

[Hide series]

BODC id	Date/Time	Location
1298166	1993-02-16 06:00	62° 26' 13" S 28° 42' 38" E
1298191	1993-02-17 08:20	64° 28' 35" S 32° 26' 48" E
1298222	1993-02-23 14:38	62° 44' 52" S 83° 28' 16" E
1298338	1993-03-07 02:25	47° 40' 28" S 57° 18' 1" E
1298387	1993-03-10 14:37	46° 46' 36" S 53° 7' 3" E
1298399	1993-03-11 15:59	45° 24' 6" S 47° 57' 55" E
1298130	1993-02-13 09:29	56° 15' 33" S 21° 7' 44" E
1298295	1993-03-04 17:25	48° 28' 30" S 60° 57' 59" E
1298375	1993-03-10 03:00	47° 7' 48" S 54° 33' 35" E
1298271	1993-02-25 08:18	65° 5' 30" S 85° 19' 16" E
1298129	1993-02-12 10:36	54° 29' 58" S 19° 20' 59" E
1298283	1993-02-26 01:02	63° 42' 46" S 84° 9' 49" E
1298302	1993-03-05 16:07	48° 16' 22" S 60° 1' 4" E
1298351	1993-03-08 19:59	47° 17' 29" S 55° 17' 26" E
1298363	1993-03-09 20:21	46° 54' 44" S 53° 38' 3" E
1298142	1993-02-14 06:32	58° 2' 12" S 23° 4' 9" E
1298178	1993-02-17 04:17	64° 28' 21" S 32° 26' 48" E
1298210	1993-02-23 09:11	62° 10' 5" S 83° 16' 12" E
1298246	1993-02-24 16:08	64° 10' 3" S 84° 34' 26" E
1298258	1993-02-25 00:46	64° 37' 13" S 84° 59' 37" E
1298314	1993-03-06 00:36	48° 5' 3" S 59° 9' 39" E
1298209	1993-02-20 08:07	64° 40' 34" S 58° 9' 59" E
1298326	1993-03-06 19:15	47° 52' 23" S 58° 13' 38" E
1298234	1993-02-24 00:34	63° 21' 16" S 83° 55' 47" E
1298117	1993-02-11 12:14	52° 0' 5" S 17° 30' 5" E
1298154	1993-02-14 20:05	59° 40' 46" S 24° 53' 45" E

25 CTD/STD cast

Transmittance and attenuance of the water column
Salinity of the water column
Temperature of the water column
Vertical spatial coordinates
Dissolved oxygen parameters in the water column
Density of the water column

[Show series]

[Hide series]

BODC id	Date/Time	Location
1004698	1993-02-11 11:09	52° 0' 5" S 17° 30' 5" E
1004754	1993-02-17 07:25	64° 28' 35" S 32° 26' 48" E
1004871	1993-03-05 14:10	48° 16' 22" S 60° 1' 4" E
1004895	1993-03-06 17:32	47° 52' 23" S 58° 13' 38" E
1004951	1993-03-10 13:33	46° 46' 36" S 53° 7' 3" E
1004822	1993-02-24 23:02	64° 37' 13" S 84° 59' 37" E
1004902	1993-03-07 00:45	47° 40' 28" S 57° 18' 1" E
1004717	1993-02-13 07:40	56° 15' 33" S 21° 7' 44" E
1004778	1993-02-23 08:05	62° 10' 5" S 83° 16' 13" E
1004858	1993-03-04 15:29	48° 28' 30" S 60° 57' 59" E
1004938	1993-03-10 01:24	47° 7' 48" S 54° 33' 35" E
1004705	1993-02-12 09:06	54° 29' 58" S 19° 20' 59" E
1004766	1993-02-20 06:30	64° 40' 34" S 58° 10' 0" E
1004846	1993-02-25 23:44	63° 42' 46" S 84° 9' 49" E
1004730	1993-02-14 18:17	59° 40' 46" S 24° 53' 45" E
1004883	1993-03-05 22:44	48° 5' 4" S 59° 9' 39" E
1004963	1993-03-11 14:42	45° 24' 6" S 47° 57' 55" E
1004729	1993-02-14 04:19	58° 2' 12" S 23° 4' 9" E
1004742	1993-02-16 04:13	62° 26' 13" S 28° 42' 38" E
1004791	1993-02-23 13:27	62° 44' 52" S 83° 28' 16" E
1004809	1993-02-23 23:05	63° 21' 16" S 83° 55' 47" E
1004810	1993-02-24 14:31	64° 10' 3" S 84° 34' 26" E
1004834	1993-02-25 07:03	65° 5' 30" S 85° 19' 16" E
1004914	1993-03-08 18:28	47° 17' 29" S 55° 17' 25" E
1004926	1993-03-09 19:02	46° 54' 44" S 53° 38' 3" E

14 Paddle wheel current meter

Date and time
Salinity of the water column
Temperature of the water column
Horizontal velocity of the water column (currents)
Electrical conductivity of the water column

[Show series]

Date and time
Salinity of the water column
Temperature of the water column
Horizontal velocity of the water column (currents)
Electrical conductivity of the water column

[Hide series]

BODC id	Date/Time	Location
581001	1993-03-06 17:30 — 1994-03-21 10:38:58	47° 45' 18" S 58° 2' 48" E
581166	1993-03-10 13:30 — 1994-03-04 00:38	46° 50' 30" S 53° 20' 17" E
581191	1993-03-10 13:30 — 1994-03-04 00:46:02	46° 50' 30" S 53° 20' 17" E
580986	1993-03-06 17:30 — 1994-03-21 10:39:59	47° 45' 18" S 58° 2' 48" E
580974	1993-03-06 17:30 — 1994-03-21 10:37	47° 45' 18" S 58° 2' 48" E
581086	1993-03-08 17:30 — 1994-03-04 12:14	47° 25' 0" S 55° 36' 29" E
581154	1993-03-09 14:30 — 1994-03-03 06:36:01	47° 1' 12" S 54° 5' 17" E
580998	1993-03-06 17:30 — 1994-03-21 10:39:59	47° 45' 18" S 58° 2' 48" E
581013	1993-03-06 17:30 — 1994-03-21 10:42:58	47° 45' 18" S 58° 2' 48" E
581074	1993-03-07 12:30 — 1994-03-05 01:41:58	47° 37' 0" S 56° 48' 24" E
581117	1993-03-08 17:30 — 1994-03-04 12:45	47° 25' 0" S 55° 36' 29" E
580937	1993-03-05 14:30 — 1994-03-07 12:43	48° 11' 53" S 59° 37' 41" E
580962	1993-03-06 09:30 — 1994-03-07 02:40	48° 0' 6" S 58° 38' 12" E
581129	1993-03-09 14:30 — 1994-03-03 06:46	47° 1' 12" S 54° 5' 17" E

18 Savonius rotor current meter

Date and time
Temperature of the water column
Horizontal velocity of the water column (currents)
Sea level

[Show series]

Date and time
Temperature of the water column
Horizontal velocity of the water column (currents)
Sea level

[Hide series]

BODC id	Date/Time	Location
581025	1993-03-06 17:30 — 1994-03-21 10:22:59	47° 45' 18" S 58° 2' 48" E
581050	1993-03-07 12:30 — 1994-01-16 10:29:58	47° 37' 0" S 56° 48' 24" E
581037	1993-03-06 17:30 — 1993-12-02 13:33:01	47° 45' 18" S 58° 2' 48" E
581178	1993-03-10 13:30 — 1993-03-12 12:30	46° 50' 30" S 53° 20' 17" E
580949	1993-03-06 09:30 — 1993-08-30 10:30	48° 0' 6" S 58° 38' 12" E
581210	1993-03-11 15:30 — 1994-02-27 01:29:58	45° 26' 12" S 47° 59' 41" E
581062	1993-03-07 12:30 — 1993-05-07 08:30	47° 37' 0" S 56° 48' 24" E
581130	1993-03-09 14:30 — 1994-03-03 06:38	47° 1' 12" S 54° 5' 17" E
581105	1993-03-08 17:30 — 1994-03-04 12:21:59	47° 25' 0" S 55° 36' 29" E
581142	1993-03-09 14:30 — 1994-03-03 06:20	47° 1' 12" S 54° 5' 17" E
580925	1993-03-05 14:30 — 1993-08-21 09:35	48° 11' 53" S 59° 37' 41" E
580950	1993-03-06 09:30 — 1994-03-07 01:15	48° 0' 6" S 58° 38' 12" E
581098	1993-03-08 17:30 — 1994-03-04 12:33:58	47° 25' 0" S 55° 36' 29" E
580894	1993-03-04 14:30 — 1994-03-08 08:36	48° 34' 47" S 61° 30' 47" E
580901	1993-03-04 14:30 — 1993-10-19 19:30	48° 34' 47" S 61° 30' 47" E
581049	1993-03-07 12:30 — 1994-03-05 01:35:01	47° 37' 0" S 56° 48' 24" E
580913	1993-03-05 14:30 — 1994-03-07 12:36:01	48° 11' 53" S 59° 37' 41" E
581209	1993-03-11 15:30 — 1993-03-12 04:30	45° 26' 12" S 47° 59' 41" E

1 Single-beam echosounder

Horizontal spatial co-ordinates
Date and time
Bathymetry and Elevation

[Show series]

Horizontal spatial co-ordinates
Date and time
Bathymetry and Elevation

[Hide series]

BODC id	Date/Time	Location	Doc.
582157	1993-02-06 18:46 — 1993-03-06 12:56	65° 9' 50" S 17° 27' 26" E — 34° 32' 17" S 85° 25' 8" E

Discrete samples

27 CTD frame plus rosette sampler

Transmittance and attenuance of the water column
Phosphate concentration parameters in the water column
Salinity of the water column
Temperature of the water column
Dissolved oxygen parameters in the water column
Stable isotopes in water bodies
Silicate concentration parameters in the water column
Other halocarbon concentrations in water bodies
Density of the water column
Chlorofluorocarbon concentrations in the water column
Nitrate concentration parameters in the water column

135 Expendable Bathythermograph

Temperature of the water column

110 Sample taken from ship's non-toxic supply

Organosulphur and organoselenium species concentration parameters in water bodies
Phaeopigment concentrations in the water column
Chlorophyll pigment concentrations in water bodies

6409 Shipborne Acoustic Doppler Current Profile

Resources

RRS Discovery D200

Cruise summary report

Quick links

BODC holdings

EDMED