RRS Discovery D368

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Cruise Info.

Ship name (ship code)

RRS Discovery (74E3)

Cruise identifier

D368

Cruise period

2011-07-15 — 2011-08-04

Status

Completed

Port of departure

Liverpool, United Kingdom

Port of return

Santa Cruz de Tenerife, Spain

Purpose

Research

Objectives

CTD stations on 20W line from 50N to 20N, following the old WOCE line A16N

Physical measurements (CTDO and LADCP) and discrete samples for salt, oxygen, inorganic nutrients and alkalinity/inorganic carbon

Underway ADCP, surface ocean measurements, surface meteorology measurements.

Contribution to GO-SHIP sustained hydrography program.

Partial repeat of a hydrographic line last occupied in 2003.

Chief scientist

Brian A King (National Oceanography Centre, Southampton)

Project

GO-SHIP

Coordinating body

National Oceanography Centre, Southampton

Cruise report

(5.85 MB)

Ocean/sea areas

General

North East Atlantic Ocean (limit 40W)

Specific

North Atlantic Ocean, 20°W, 20°N to 50°N

Track charts

(0.09 MB)

Measurements

Physical oceanography

Surface measurements underway (T,S)

Quantity: activity duration in days = 20
Description: Discrete salinity samples from underway supply, analysed using an autosalinometer. Used to calibrate the underway salinity sensor situated in the SurfMet system.

Surface measurements underway (T,S)

Quantity: activity duration in days = 20
Description: Underway salinity, temperature, transmittance and fluorescence from SurfMet system

Water bottle stations

Quantity: number of stations = 29
Description: Discrete oxygen samples from CTD bottles, analysed using Winkler titration and Metrohm 794 Basic Tritrino titration unit. Used to calibrate CTD oxygen sensor.

Water bottle stations

Quantity: number of stations = 29
Description: Water collected from depth for discrete samples using a SeaBird 911+ stainless steel CTD frame fitted with SBE 32, 24-way carousel and 24 x 10 L Niskin bottles. Station depths ranged from 3404-5329 metres

Water bottle stations

Quantity: number of stations = 29
Description: Discrete inorganic nutrients (N, P & Si) samples from CTD bottles, analysed using automated segmented flow analysis with colourimetric detection.

Water bottle stations

Quantity: number of stations = 29
Description: Discrete salinity samples from CTD bottles, analysed using an autosalinometer. Used to calibrate CTD salinity

Water bottle stations

Quantity: number of stations = 29
Description: Discrete water samples collected from CTD bottles to determine dissolved inorganic carbon (DIC) concentration and total alkalinity using coulometry and potentiometry analysis

CTD stations

Quantity: number of stations = 29
Description: Temperature, salinity, pressure, transmittance, fluorescence, oxygen and back-scatter using a SeaBird 911+ stainless steel CTD unit. Station depths ranged from 3404-5329 metres

CTD stations

Quantity: number of stations = 29
Description: Sea water velocities using a RDI WH monitor 300 kHz lowered acoustic doppler current profiler (LADCP)

Subsurface temperature and salinity measurements

Quantity: activity duration in days = 20
Description: Water velocities using a 75 kHz vessel mounted acoustic doppler current profiler (VMADCP)

Transparency (eg transmissometer)

Quantity: activity duration in days = 20
Description: Underway salinity, temperature, transmittance and fluorescence from SurfMet system

Transparency (eg transmissometer)

Optics (eg underwater light levels)

Quantity: activity duration in days = 20
Description: Underway salinity, temperature, transmittance and fluorescence from SurfMet system

Current profiler (eg ADCP)

Quantity: activity duration in days = 20
Description: Water velocities using a 75 kHz vessel mounted acoustic doppler current profiler (VMADCP)

Current profiler (eg ADCP)

Quantity: number of stations = 29
Description: Sea water velocities using a RDI WH monitor 300 kHz lowered acoustic doppler current profiler (LADCP)

Neutrally buoyant floats

Quantity: number of deployments = 3
Description: 3 PROVOR floats deployed for French Argo program

Chemical oceanography

Oxygen

Phosphate

Quantity: number of stations = 29
Description: Discrete inorganic nutrients (N, P & Si) samples from CTD bottles, analysed using automated segmented flow analysis with colourimetric detection.

Total - N

Quantity: number of stations = 29
Description: Discrete inorganic nutrients (N, P & Si) samples from CTD bottles, analysed using automated segmented flow analysis with colourimetric detection.

Silicate

Quantity: number of stations = 29
Description: Discrete inorganic nutrients (N, P & Si) samples from CTD bottles, analysed using automated segmented flow analysis with colourimetric detection.

Alkalinity

Other chemical oceanographic measurements

Biology and fisheries

Phytoplankton

Quantity: number of stations = 15
Description: Water samples collected from CTD bottles and concentrated by filtration. Samples were frozen immediately at -80C and stored for further molecular characterisation of the bacterial and smallest phytoplankton communities.

Pelagic bacteria/micro-organisms

Meteorology

Routine standard measurements

Quantity: activity duration in days = 20
Description: Underway atmospheric pressure, air temperature, air humidity, total irradiance (TIR), photosynthetic radiation (PAR), wind speed and wind direction from SurfMet system

Geology and geophysics

Single-beam echosounding

Quantity: activity duration in days = 20
Description: Sea floor depth using a SIMRAD EA600

Data held at BODC

Get data

Series/Profiles

1 Acoustic doppler current profiler

Reference numbers
Horizontal spatial co-ordinates
Date and time
Vertical spatial coordinates
Horizontal platform movement
Horizontal velocity of the water column (currents)

[Show series]

Reference numbers
Horizontal spatial co-ordinates
Date and time
Vertical spatial coordinates
Horizontal platform movement
Horizontal velocity of the water column (currents)

[Hide series]

BODC id	Date/Time	Location	Doc.
1102030	2011-07-15 11:58:50 — 2011-08-04 03:46:11	23° 19' 55" N 27° 8' 40" W — 53° 34' 0" N 4° 10' 32" W

28 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
1851737	2011-07-21 16:52	45° 59' 22" N 20° 0' 5" W
1851817	2011-07-24 19:02	38° 0' 42" N 20° 0' 8" W
1851878	2011-07-27 10:44	31° 59' 49" N 22° 14' 56" W
1851713	2011-07-20 20:49	48° 1' 31" N 19° 59' 38" W
1851749	2011-07-22 02:25	45° 0' 8" N 20° 0' 24" W
1851934	2011-07-29 19:18	26° 59' 58" N 25° 3' 40" W
1851946	2011-07-30 06:10	26° 0' 5" N 25° 37' 24" W
1851958	2011-07-30 16:08	24° 59' 40" N 26° 11' 28" W
1851701	2011-07-20 05:39	49° 0' 19" N 19° 59' 44" W
1851750	2011-07-22 14:36	44° 0' 32" N 20° 0' 55" W
1851774	2011-07-23 06:02	42° 2' 50" N 20° 0' 3" W
1851786	2011-07-23 14:59	41° 0' 3" N 20° 0' 30" W
1851798	2011-07-24 00:20	39° 59' 39" N 19° 58' 59" W
1851854	2011-07-26 13:07	33° 59' 56" N 21° 7' 34" W
1851830	2011-07-25 16:00	36° 0' 33" N 20° 0' 38" W
1851910	2011-07-28 17:42	28° 59' 52" N 23° 55' 52" W
1851922	2011-07-29 08:38	28° 1' 4" N 24° 30' 25" W
1851909	2011-07-28 07:19	30° 0' 14" N 23° 22' 39" W
1851805	2011-07-24 09:34	38° 59' 52" N 20° 0' 25" W
1851829	2011-07-25 06:43	36° 50' 36" N 20° 0' 5" W
1851866	2011-07-26 23:56	33° 0' 35" N 21° 41' 31" W
1851891	2011-07-27 20:45	31° 0' 28" N 22° 48' 3" W
1851762	2011-07-22 20:30	43° 0' 10" N 19° 59' 27" W
1851842	2011-07-26 02:36	35° 0' 10" N 20° 32' 43" W
1851983	2011-07-31 10:51	23° 20' 32" N 27° 8' 8" W
1851971	2011-07-31 02:22	24° 0' 2" N 26° 45' 33" W
1851995	2011-08-03 23:39	28° 46' 55" N 16° 0' 5" W
1851725	2011-07-21 07:13	47° 0' 1" N 19° 59' 16" W

29 CTD/STD cast

Reference numbers
Transmittance and attenuance of the water column
Optical backscatter
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
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies

[Show series]

[Hide series]

BODC id	Date/Time	Location
1137527	2011-07-21 07:13:59	47° 0' 1" N 19° 59' 16" W
1137668	2011-07-26 13:07:29	33° 59' 56" N 21° 7' 34" W
1137681	2011-07-26 23:56:56	33° 0' 35" N 21° 41' 31" W
1137797	2011-07-31 10:51:46	23° 20' 32" N 27° 8' 8" W
1137515	2011-07-20 20:49:16	48° 1' 31" N 19° 59' 38" W
1137576	2011-07-23 06:02:23	42° 2' 50" N 20° 0' 3" W
1137540	2011-07-22 02:25:16	45° 0' 8" N 20° 0' 24" W
1137552	2011-07-22 12:45:36	44° 0' 32" N 20° 0' 55" W
1137619	2011-07-24 09:34:17	38° 59' 52" N 20° 0' 25" W
1137644	2011-07-25 16:00:50	36° 0' 33" N 20° 0' 38" W
1137539	2011-07-21 16:52:29	45° 59' 22" N 20° 0' 5" W
1137761	2011-07-30 06:10:32	26° 0' 5" N 25° 37' 24" W
1137785	2011-07-31 02:22:21	24° 0' 2" N 26° 45' 33" W
1137804	2011-08-03 23:39:09	28° 46' 55" N 16° 0' 5" W
1137588	2011-07-23 14:59:37	41° 0' 3" N 20° 0' 30" W
1137607	2011-07-24 00:20:06	39° 59' 39" N 19° 58' 59" W
1137656	2011-07-26 02:36:47	35° 0' 10" N 20° 32' 43" W
1137496	2011-07-19 10:09:48	48° 38' 59" N 17° 1' 32" W
1137503	2011-07-20 05:39:58	49° 0' 19" N 19° 59' 44" W
1137620	2011-07-24 19:02:09	38° 0' 42" N 20° 0' 8" W
1137632	2011-07-25 06:43:26	36° 50' 36" N 20° 0' 5" W
1137693	2011-07-27 10:44:40	31° 59' 49" N 22° 14' 56" W
1137724	2011-07-28 17:42:23	28° 59' 52" N 23° 55' 52" W
1137700	2011-07-27 20:45:09	31° 0' 28" N 22° 48' 3" W
1137736	2011-07-29 08:38:21	28° 1' 4" N 24° 30' 25" W
1137712	2011-07-28 07:19:17	30° 0' 14" N 23° 22' 39" W
1137564	2011-07-22 20:30:14	43° 0' 10" N 19° 59' 27" W
1137748	2011-07-29 19:18:39	26° 59' 58" N 25° 3' 40" W
1137773	2011-07-30 16:08:59	24° 59' 40" N 26° 11' 28" W

Discrete samples

58 CTD frame plus rosette sampler

Salinity of the water column
Dissolved oxygen parameters in the water column

110 Sample taken from ship's non-toxic supply

Salinity of the water column

Resources

RRS Discovery D368

Cruise summary report

Quick links

BODC holdings

EDMED