RRS Discovery D207

Cruise summary report

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Cruise Info.

Ship name (ship code)

RRS Discovery (74E3)

Cruise identifier

D207

Cruise period

1994-02-19 — 1994-03-31

Status

Completed

Port of departure

Cape Town, South Africa

Port of return

Port Louis, Mauritius

Objectives

1. To make measurements of the flow of deep and bottom waters passing eastward from the Weddell-Enderby Abyssal Plain to the Southern Indian Ocean via deep topographic gaps to the northeast and southeast of the Kerguelen Plateau. Specifically, to recover the two main current meter arrays deployed during Discovery 200 - an array of 10 moorings (42 current meters) and 2 bottom pressure gauges in the main gap between Crozet and Kerguelen, supplemented with a mooring in the deep cleft immediately west of Crozet Island, and a further 5 moorings (13 current meters) set in the Princess Elizabeth Trough between the Kerguelen Plateau and Antarctica.
2. To use a range of tracers, including the CFCs 10, 11, 12, 113, inorganic nutrients, dissolved oxygen and both oxygen and hydrogen isotopes (including meltwater content) to assist in partitioning the deep throughflow into its constituent watermasses, and to track the onward incursion of the AABW plume into the Indian Ocean.
3. To make discrete measurements of CO2 partial pressure in seawater, total seawater CO2 content and appropriate measures of biological activity throughout the cruise track as a BFOS/PRIME component of the BAS Antarctic Special Topic, and as a necessary determinant of WOCE.
4. To monitor a suite of discontinuous and continuous environmental variables throughout the cruise, including bathymetry from PES, XBT and ADCP, multimet, wave recorder, and thermosalinograph, and where possible to locate the major ocean frontal zones in this sector of the Southern Ocean.
5. To use a range of satellite-derived ice and weather intelligence where possible and appropriate.
6. To obtain water samples for heavy-metal analysis by Dr Frew.

Chief scientist

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

Project

WOCE

Coordinating body

IOC/WMO

Cruise report

(3.83 MB)

Ocean/sea areas

General

Indian Ocean

Specific

Southern Indian Ocean, Crozet-Kerguelen, Princess Eliz.Trough, Madagascar Basin

Track charts

(0.13 MB)

Measurements

Physical oceanography

Surface measurements underway (T,S)

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

Bathythermograph

Quantity: number of profiles = 160
Description: XBTs

CTD stations

Quantity: number of stations = 33

Geochemical tracers (eg freons)

Quantity: number of stations = 33
Description: CFC12, CFC11, CFC113, CFC10, CCl4

Current meters

Quantity: number of stations = 14
Description: 46 cms recovered

Current profiler (eg ADCP)

Quantity: activity duration in days = 40
Description: cont. shipborne ADCP records

Instrumented wave measurements

Quantity: activity duration in days = 40
Description: cont. wave recordings

Chemical oceanography

Oxygen

Quantity: number of stations = 33

Carbon dioxide

Quantity: activity duration in days = 40
Description: cont. pCO2 and TCO2

Phosphate

Quantity: number of stations = 33

Nitrate

Quantity: number of stations = 33

Nitrite

Quantity: number of stations = 33

Silicate

Quantity: number of stations = 33

Isotopes

Quantity: number of stations = 33

Contamination

Trace metals

Quantity: number of stations = 33

Meteorology

Routine standard measurements

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

Other meteorological measurements

Quantity: activity duration in days = 40
Description: cont. logging of wind,pressure,air temp,radiation,irradiance,waves

Moorings, landers, buoys

Physical oceanography

Current meters

47° 1' 0" S 53° 4' 59" E — recover 4 meters, 1432 days data

Current meters

48° 34' 59" S 61° 31' 0" E — recover 2 meters, 629 days data

Current meters

47° 45' 0" S 58° 2' 59" E — recover 7 meters, 2512 days data

Current meters

48° 12' 0" S 59° 37' 59" E — recover 4 meters, 891 days data

Current meters

64° 49' 0" S 85° 7' 0" E — recover 2 meters, 276 days data

Current meters

63° 55' 59" S 84° 19' 0" E — recover 3 meters, 764 days data

Current meters

63° 30' 0" S 83° 57' 0" E — recover 3 meters, 1125 days data

Current meters

47° 37' 0" S 56° 47' 59" E — recover 4 meters, 1139 days data

Current meters

46° 25' 59" S 48° 0' 0" E — recover 2 meters, 352 days data

Current meters

47° 25' 0" S 55° 36' 0" E — recover 4 meters, 1243 days data

Current meters

48° 0' 0" S 58° 37' 59" E — recover 3 meters, 1095 days data

Current meters

64° 22' 59" S 84° 42' 0" E — recover 3 meters, 786 days data

Current meters

63° 2' 59" S 83° 34' 59" E — recover 2 meters, 764 days data

Current meters

46° 49' 59" S 53° 19' 59" E — recover 3 meters, 717 days data

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

46° 52' 0" S 53° 28' 0" E — recover 1 bottom pressure recorder, 365 days data

Data held at BODC

Get data

Series/Profiles

24 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
1299502	1994-02-28 01:45	43° 12' 49" S 51° 33' 18" E
1299575	1994-03-02 19:13	47° 7' 14" S 54° 32' 31" E
1299711	1994-03-29 07:23	27° 30' 28" S 56° 8' 44" E
1299446	1994-02-24 19:41	49° 29' 52" S 41° 56' 21" E
1299655	1994-03-27 18:21	29° 39' 43" S 53° 28' 57" E
1299679	1994-03-28 08:52	28° 54' 30" S 54° 45' 14" E
1299483	1994-02-26 04:27	46° 38' 14" S 44° 59' 13" E
1299538	1994-03-01 01:23	43° 9' 38" S 54° 34' 8" E
1299551	1994-03-01 07:32	43° 11' 36" S 54° 29' 2" E
1299618	1994-03-05 16:02	47° 40' 46" S 57° 35' 21" E
1299692	1994-03-29 00:48	28° 4' 53" S 56° 5' 14" E
1299458	1994-02-25 06:24	48° 28' 46" S 43° 6' 49" E
1299526	1994-02-28 16:34	43° 9' 29" S 53° 59' 24" E
1299599	1994-03-03 22:54	46° 45' 0" S 53° 5' 50" E
1299606	1994-03-04 19:10	47° 18' 30" S 55° 16' 24" E
1299643	1994-03-07 18:59	48° 16' 50" S 60° 0' 34" E
1299680	1994-03-28 17:04	28° 31' 11" S 55° 29' 18" E
1299471	1994-02-25 16:09	47° 26' 41" S 44° 7' 1" E
1299495	1994-02-27 18:48	43° 16' 46" S 50° 36' 55" E
1299631	1994-03-07 09:38	48° 5' 24" S 59° 8' 28" E
1299667	1994-03-28 01:57	29° 19' 33" S 54° 10' 49" E
1299514	1994-02-28 10:24	43° 9' 22" S 53° 12' 45" E
1299563	1994-03-01 13:15	43° 10' 39" S 55° 9' 3" E
1299587	1994-03-03 16:20	46° 55' 5" S 53° 36' 47" E

32 CTD/STD cast

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

[Show series]

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

[Hide series]

BODC id	Date/Time	Location
1006238	1994-03-14 12:56	65° 31' 54" S 84° 37' 53" E
1006263	1994-03-22 04:03	47° 31' 22" S 56° 12' 0" E
1006367	1994-03-28 23:07	28° 4' 53" S 56° 5' 14" E
1006379	1994-03-29 05:32	27° 30' 28" S 56° 8' 44" E
1006122	1994-03-01 05:59	43° 11' 36" S 54° 29' 3" E
1006318	1994-03-27 16:40	29° 39' 43" S 53° 28' 57" E
1006355	1994-03-28 15:21	28° 31' 11" S 55° 29' 18" E
1006029	1994-02-24 17:57	49° 29' 52" S 41° 56' 21" E
1006078	1994-02-28 00:17	43° 12' 49" S 51° 33' 17" E
1006158	1994-03-03 14:51	46° 55' 5" S 53° 36' 47" E
1006030	1994-02-25 04:43	48° 28' 46" S 43° 6' 49" E
1006042	1994-02-25 14:41	47° 26' 42" S 44° 7' 1" E
1006195	1994-03-05 14:12	47° 40' 46" S 57° 35' 21" E
1006226	1994-03-14 09:13	66° 2' 21" S 84° 33' 8" E
1006306	1994-03-24 12:37	43° 9' 55" S 56° 32' 59" E
1006110	1994-02-28 23:52	43° 9' 38" S 54° 34' 8" E
1006134	1994-03-01 11:41	43° 10' 39" S 55° 9' 3" E
1006146	1994-03-02 17:41	47° 7' 14" S 54° 32' 31" E
1006202	1994-03-07 07:38	48° 5' 24" S 59° 8' 28" E
1006343	1994-03-28 07:06	28° 54' 29" S 54° 45' 14" E
1006054	1994-02-26 03:05	46° 38' 14" S 44° 59' 13" E
1006066	1994-02-27 17:30	43° 16' 46" S 50° 36' 55" E
1006214	1994-03-07 17:17	48° 16' 50" S 60° 0' 34" E
1006287	1994-03-23 21:51	43° 11' 5" S 54° 53' 48" E
1006331	1994-03-28 00:10	29° 19' 33" S 54° 10' 49" E
1006091	1994-02-28 09:04	43° 9' 22" S 53° 12' 46" E
1006275	1994-03-23 10:54	43° 9' 44" S 53° 33' 34" E
1006299	1994-03-24 04:42	43° 11' 4" S 55° 41' 12" E
1006109	1994-02-28 15:00	43° 9' 29" S 53° 59' 24" E
1006171	1994-03-03 21:41	46° 45' 0" S 53° 5' 50" E
1006183	1994-03-04 17:24	47° 18' 30" S 55° 16' 24" E
1006251	1994-03-20 09:11	48° 34' 36" S 61° 26' 55" 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.
582182	1994-02-21 06:32 — 1994-03-31 03:14	66° 2' 44" S 24° 56' 52" E — 20° 7' 0" S 85° 9' 50" E

Discrete samples

32 CTD frame plus rosette sampler

Phosphate concentration parameters in the water column
Salinity of the water column
Dissolved oxygen parameters in the water column
Temperature of 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

141 Expendable Bathythermograph

Temperature of the water column

661 Sample taken from ship's non-toxic supply

Salinity of the water column

7309 Shipborne Acoustic Doppler Current Profile

Resources

RRS Discovery D207

Cruise summary report

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BODC holdings

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