RRS Discovery D181

Cruise summary report

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Cruise Info.

Ship name (ship code)

RRS Discovery (74E3)

Cruise identifier

D181

Cruise period

1989-04-01 — 1989-05-03

Status

Completed

Port of departure

Barry, United Kingdom

Port of return

Barry, United Kingdom

Objectives

1. Quantify the circulation of the Biscay region northeast of 41N, 30W with a box of full depth CTD casts at about 75km intervals along the sections. Sampling will include nutrients (nitrates, phosphates and silicates), chlorophyll 'a' and bacterial counts. Vertical net samples will also be taken during selected CTDs for BOFS.
2. Conduct SeaSoar trials to test various modifications to the fairing, fish and depressor, designed to improve its performance and increase its maximum depth and duration of tow; also to test improved editing and display software.
3. Run SeaSoar sections within the CTD survey box to quantify variations of the T/S characteristics of newly ventilated winter Mode water.
4. Run a SeaSoar section from 47N to 60N along the BOFs line at 20W to examine the latitudinal variation of mixed layer depth, the horizontal statistics of eddy and frontal activity, and the variability of upper ocean properties (temperature, salinity, oxygen and chlorophyll 'a').
5. Continuously sample surface parameters to examine the spatial (and temporal) variability of temperature, salinity and fluorescence.
6. Deploy and recover a short term mooring (4 weeks) to observe internal tidal wave propagation off the Celtic shelf.
7. Deploy a two year trial mooring close to 6.
8. Recover two moorings from the shelf edge off the north coast of Spain.
9. Deploy sediment traps at 47N, 20W for BOFS.

Chief scientist

Raymond T Pollard (Institute of Oceanographic Sciences Deacon Laboratory)

Project

BOFS

Cruise report

(1.16 MB)

Ocean/sea areas

General

Bay of Biscay
North East Atlantic Ocean (limit 40W)

Specific

Bay of Biscay - 20øW

Track charts

Measurements

Physical oceanography

Surface measurements underway (T,S)

Bathythermograph

Quantity: number of profiles = 31

CTD stations

Quantity: number of stations = 58

Subsurface temperature and salinity measurements

Quantity: track kilometres = 3111.36
Description: Seasoar

Current meters

Quantity: number of deployments = 3
Description: 23 (211d)

Current profiler (eg ADCP)

Description: ADCP

Surface drifters/drifting buoys

Quantity: number of deployments = 4
Description: Argos Buoys

Chemical oceanography

Oxygen

Nitrate

Biology and fisheries

Phytoplankton pigs (eg chlorophyll, fluorescence)

Particulate organic matter (inc POC, PON)

Description: POC & PON

Phytoplankton

Description: Lugols

Zooplankton

Description: WP2 nets,formalin

Seston

Quantity: number of hauls = 7
Description: apstein nets

Meteorology

Incident radiation

Description: 2 minute samples

Other meteorological measurements

Description: hourly wind speed and direction

Data held at BODC

Get data

Series/Profiles

12 CTD in towed or autonomous underwater vehicle

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BODC id	Date/Time	Location
365508	1989-04-13 14:50	41° 31' 49" N 20° 19' 21" W
365545	1989-04-23 05:14	51° 55' 53" N 17° 9' 35" W
365557	1989-05-01 23:43	47° 23' 5" N 6° 45' 56" W
365570	1989-04-27 09:00	47° 35' 14" N 13° 18' 3" W
365490	1989-04-10 14:44	41° 50' 56" N 14° 48' 17" W
365569	1989-04-28 21:20	43° 3' 36" N 10° 58' 43" W
365533	1989-04-16 11:04	45° 58' 27" N 19° 52' 43" W
365489	1989-04-09 10:09	42° 5' 33" N 11° 13' 34" W
365582	1989-04-25 21:00	43° 58' 41" N 16° 57' 56" W
365601	1989-04-19 20:45	51° 58' 7" N 19° 28' 38" W
365521	1989-04-14 13:57	43° 26' 6" N 20° 9' 58" W
365594	1989-04-24 02:09	49° 53' 3" N 17° 4' 6" W

58 CTD/STD cast

Reference numbers
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
Electrical conductivity of the water column

[Show series]

[Hide series]

BODC id	Date/Time	Location
291330	1989-04-02 10:21 — 1989-04-02 11:08	49° 11' 34" N 6° 14' 35" W
291551	1989-04-09 08:18 — 1989-04-09 08:57	42° 5' 46" N 11° 13' 33" W
291563	1989-04-09 15:27 — 1989-04-09 16:28	42° 2' 1" N 12° 7' 41" W
291864	1989-04-20 18:42 — 1989-04-20 19:20	53° 20' 2" N 19° 34' 26" W
291538	1989-04-09 01:44 — 1989-04-09 02:28	42° 9' 10" N 10° 19' 54" W
291631	1989-04-11 13:55 — 1989-04-11 14:47	41° 40' 11" N 17° 27' 38" W
291692	1989-04-14 10:54 — 1989-04-14 11:51	43° 26' 28" N 20° 8' 53" W
291784	1989-04-17 21:09 — 1989-04-17 22:11	48° 2' 38" N 19° 33' 35" W
291354	1989-04-03 04:04 — 1989-04-03 06:57	47° 17' 5" N 6° 39' 47" W
291410	1989-04-05 18:57 — 1989-04-05 19:46	45° 4' 7" N 7° 0' 20" W
291827	1989-04-19 03:20 — 1989-04-19 04:14	50° 40' 46" N 19° 37' 3" W
291772	1989-04-17 18:04 — 1989-04-17 18:27	47° 57' 57" N 19° 32' 33" W
291409	1989-04-05 12:45 — 1989-04-05 13:53	45° 33' 19" N 7° 0' 10" W
291840	1989-04-19 15:56 — 1989-04-19 16:49	51° 59' 24" N 19° 33' 17" W
291920	1989-04-22 05:00 — 1989-04-22 05:55	52° 42' 31" N 16° 9' 38" W
291932	1989-04-22 11:57 — 1989-04-22 12:45	52° 0' 4" N 16° 1' 14" W
291839	1989-04-19 09:34 — 1989-04-19 10:32	51° 20' 1" N 19° 33' 41" W
291907	1989-04-21 16:37 — 1989-04-21 17:13	53° 36' 20" N 17° 25' 25" W
291514	1989-04-08 14:59 — 1989-04-08 15:30	43° 15' 13" N 9° 29' 39" W
291667	1989-04-13 12:16 — 1989-04-13 13:07	41° 32' 19" N 20° 19' 12" W
291852	1989-04-20 09:31 — 1989-04-20 10:12	52° 39' 12" N 19° 36' 2" W
291599	1989-04-10 12:07 — 1989-04-10 13:03	41° 51' 2" N 14° 47' 3" W
291723	1989-04-15 15:49 — 1989-04-15 16:42	44° 43' 9" N 19° 59' 25" W
291366	1989-04-03 08:30 — 1989-04-03 11:29	47° 17' 15" N 6° 40' 18" W
291378	1989-04-04 09:06 — 1989-04-04 10:40	46° 42' 18" N 6° 58' 9" W
291446	1989-04-06 19:44 — 1989-04-06 20:23	44° 1' 54" N 6° 58' 18" W
291483	1989-04-07 22:05 — 1989-04-07 22:14	43° 5' 14" N 9° 59' 45" W
291680	1989-04-14 04:14 — 1989-04-14 04:57	42° 48' 25" N 20° 13' 47" W
291759	1989-04-16 17:11 — 1989-04-16 18:03	46° 35' 41" N 19° 46' 38" W
291796	1989-04-18 06:48 — 1989-04-18 07:41	48° 39' 23" N 19° 31' 27" W
291803	1989-04-18 13:31 — 1989-04-18 14:24	49° 20' 7" N 19° 32' 17" W
291815	1989-04-18 20:49 — 1989-04-18 21:47	50° 1' 7" N 19° 35' 1" W
291944	1989-04-22 18:30 — 1989-04-22 19:21	52° 0' 44" N 17° 11' 15" W
291342	1989-04-03 01:28 — 1989-04-03 02:20	47° 27' 46" N 6° 37' 12" W
291458	1989-04-06 22:11 — 1989-04-06 23:01	44° 13' 42" N 6° 58' 57" W
291471	1989-04-07 10:52 — 1989-04-07 11:40	44° 29' 31" N 9° 0' 0" W
291495	1989-04-08 12:10 — 1989-04-08 12:22	42° 15' 45" N 9° 13' 28" W
291526	1989-04-08 20:50 — 1989-04-08 21:28	42° 13' 11" N 9° 40' 56" W
291747	1989-04-16 08:30 — 1989-04-16 09:22	45° 58' 34" N 19° 52' 58" W
291956	1989-04-30 18:18 — 1989-04-30 19:09	47° 17' 59" N 6° 42' 0" W
291968	1989-05-01 01:32 — 1989-05-01 02:25	46° 43' 58" N 6° 47' 59" W
291391	1989-04-05 05:31 — 1989-04-05 06:32	46° 17' 29" N 7° 1' 54" W
291618	1989-04-11 04:23 — 1989-04-11 05:23	41° 43' 36" N 16° 33' 43" W
291876	1989-04-21 04:36 — 1989-04-21 05:00	54° 0' 7" N 19° 36' 2" W
291888	1989-04-21 10:24 — 1989-04-21 11:01	53° 48' 38" N 18° 30' 33" W
291422	1989-04-06 05:43 — 1989-04-06 06:32	44° 29' 19" N 7° 1' 59" W
291434	1989-04-06 19:05 — 1989-04-06 19:21	44° 0' 33" N 6° 57' 48" W
291502	1989-04-08 14:13 — 1989-04-08 14:28	43° 15' 29" N 9° 26' 59" W
291606	1989-04-10 20:07 — 1989-04-10 21:03	41° 47' 29" N 15° 40' 31" W
291655	1989-04-13 03:36 — 1989-04-13 04:30	41° 34' 22" N 19° 13' 59" W
291735	1989-04-16 00:10 — 1989-04-16 01:15	45° 19' 40" N 19° 57' 2" W
291760	1989-04-16 23:24 — 1989-04-17 00:17	47° 13' 57" N 19° 41' 57" W
291919	1989-04-21 22:19 — 1989-04-21 23:03	53° 24' 57" N 16° 21' 37" W
291679	1989-04-13 21:06 — 1989-04-13 21:58	42° 10' 19" N 20° 17' 46" W
291643	1989-04-12 11:42 — 1989-04-12 13:09	41° 39' 44" N 18° 24' 18" W
291575	1989-04-09 21:59	41° 57' 39" N 12° 59' 53" W
291587	1989-04-10 05:40 — 1989-04-10 06:34	41° 54' 25" N 13° 55' 30" W
291711	1989-04-14 20:24 — 1989-04-14 21:15	44° 4' 0" N 20° 2' 52" W

Discrete samples

1 Instrument mooring

Concentration of silicon species in suspended particulate material
Sedimentation flux of metallic and metalloid elements and isotopes in water bodies
Sedimentation flux of carbon, nitrogen or organic matter in the water column
Carbon concentrations in suspended particulate material
Nitrogen concentrations in suspended particulate material
Radioactivity in water bodies
Sedimentation flux of non-metallic inorganic species in the water column
Sedimentation flux quantification in the water column

Resources

RRS Discovery D181

Cruise summary report

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