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RRS Discovery DY017

Cruise summary report

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Cruise Info.

Ship name (ship code)

RRS Discovery (74EQ)

Cruise identifier

DY017

Cruise period

2014-10-20 — 2014-11-06

Status

Completed

Port of departure

Southampton, United Kingdom

Port of return

Falmouth, United Kingdom

Purpose

Research

Objectives

DY017 sampled the Hebridean and Malin shelf areas west of the UK, and parts of the Rockall Trough. The objectives were to map the large scale gradients in nutrients, dissolved iron and dissolved inorganic carbon within the context of studying shelf edge exchange processes with the open ocean. Data from this cruise will contribute towards the NERC Shelf Sea Biogeochemistry programme.

Chief scientist

Stuart Painter (National Oceanography Centre, Southampton)

Project

Shelf Sea Biogeochemistry

Cruise report

RRS Discovery DY017 cruise report dy017.pdf

(5.44 MB)

Ocean/sea areas

General

Inner Seas off the West Coast of Scotland
North East Atlantic Ocean (limit 40W)

Specific

Hebridean and Malin shelf. Rockall Trough

Track charts

RRS Discovery DY017 cruise track — dy017trk.pdf

(0.05 MB)

Measurements

Physical oceanography

CTD stations

Quantity: number of profiles = 58
Description: CTD profile data

CTD stations

Quantity: number of deployments = 6
Description: Near surface CTD profiles from floating buoy

Current profiler (eg ADCP)

Quantity: activity duration in days = 15
Description: VM-ADCP

Chemical oceanography

Oxygen

Quantity: number of samples = 284
Description: Dissolved oxygen (39 CTD profiles)

Carbon dioxide

Quantity: number of samples = 476
Description: Dissolved inorganic carbon/alkalinity measurements (CTD bottle samples)

Phosphate

Quantity: number of samples = 1034
Description: Nutrients (56 CTD profiles)

Nitrate

Quantity: number of samples = 1034
Description: Nutrients (56 CTD profiles)

Silicate

Quantity: number of samples = 1034
Description: Nutrients (56 CTD profiles)

Alkalinity

Quantity: number of samples = 476
Description: Dissolved inorganic carbon/alkalinity measurements (CTD bottle samples)

Trace elements

Quantity: number of samples = 49
Description: Iron Ligands (9 CTD profiles)

Isotopes

Quantity: number of profiles = 25
Description: 15N-NO3 (Nitrogen and oxygen isotopic analysis on nitrate)

Other chemical oceanographic measurements

Quantity: number of samples = 530
Description: Dissolved iron / total dissolvable iron measurements (21 CTD profiles)

Other chemical oceanographic measurements

Quantity: number of profiles = 25
Description: Dissolved organic nutrients

Other chemical oceanographic measurements

Quantity: number of profiles = 25
Description: Amino acids

Other chemical oceanographic measurements

Quantity: number of profiles = 25
Description: Chromophoric/Fluorescent dissolved organic matter (CDOM/FDOM):

Other chemical oceanographic measurements

Quantity: number of samples = 50
Description: Underway trace metals

Other chemical oceanographic measurements

Quantity: number of samples = 100
Description: Particulate trace metals (21 CTD profiles)

Other chemical oceanographic measurements

Quantity: number of samples = 530
Description: Dissolved total / dissolvable trace metals (21 CTD profiles)

Contamination

Suspended matter

Quantity: number of profiles = 25
Description: 15N-NO3 (Nitrogen and oxygen isotopic analysis on nitrate)

Trace metals

Quantity: number of samples = 100
Description: Particulate trace metals (21 CTD profiles)

Trace metals

Quantity: number of samples = 50
Description: Underway trace metals

Trace metals

Quantity: number of samples = 530
Description: Dissolved total / dissolvable trace metals (21 CTD profiles)

Trace metals

Quantity: number of samples = 530
Description: Dissolved iron / total dissolvable iron measurements (21 CTD profiles)

Other dissolved substances

Quantity: number of profiles = 25
Description: Dissolved organic nutrients

Other dissolved substances

Quantity: number of profiles = 25
Description: Chromophoric/Fluorescent dissolved organic matter (CDOM/FDOM):

Other dissolved substances

Quantity: number of profiles = 25
Description: Amino acids

Biology and fisheries

Phytoplankton pigs (eg chlorophyll, fluorescence)

Quantity: number of profiles = 23
Description: Chlorophyll , phytoplankton (Lugols) samples, CARD-FISH (69 samples)

Particulate organic matter (inc POC, PON)

Quantity: number of profiles = 25
Description: Particulate organic matter (POC/PON, POP)

Particulate organic matter (inc POC, PON)

Quantity: number of samples = 244
Description: POC/PON (particulate organic carbon/nitrogen - 36 CTD profiles)

Particulate organic matter (inc POC, PON)

Quantity: number of samples = 244
Description: bSi (biogenic silica - 36 CTD profiles)

Particulate organic matter (inc POC, PON)

Quantity: number of samples = 244
Description: POP (particulate organic phosphorous - 36 CTD profiles)

Particulate organic matter (inc POC, PON)

Quantity: number of samples = 48
Description: PIC (particulate inorganic carbon)

Dissolved organic matter (inc DOC)

Quantity: number of profiles = 25
Description: Dissolved organic nutrients

Dissolved organic matter (inc DOC)

Quantity: number of profiles = 25
Description: Chromophoric/Fluorescent dissolved organic matter (CDOM/FDOM):

Phytoplankton

Quantity: number of profiles = 23
Description: Chlorophyll , phytoplankton (Lugols) samples, CARD-FISH (69 samples)

Phytoplankton

Quantity: number of hauls = 17
Description: Phytoplankton counts

Moorings, landers, buoys

Physical oceanography

Current profiler (eg ADCP)

57° 6' 5" N 9° 20' 8" W — ADCP current meter for UK-OSNAP programme

Data held at BODC

Series/Profiles

3 Acoustic doppler current profiler

Reference numbers
Horizontal spatial co-ordinates
Date and time
Vertical spatial coordinates
Temperature of the water column
Platform or instrument orientation
Vertical velocity of the water column (currents)
Horizontal platform movement
Horizontal velocity of the water column (currents)
Acoustic backscatter in the water column
Metadata parameters

Reference numbers
Horizontal spatial co-ordinates
Date and time
Vertical spatial coordinates
Temperature of the water column
Platform or instrument orientation
Vertical velocity of the water column (currents)
Horizontal platform movement
Horizontal velocity of the water column (currents)
Acoustic backscatter in the water column
Metadata parameters

BODC id	Date/Time	Location	Doc.
1781302	2014-10-30 00:00 — 2015-06-20 00:00	57° 6' 14" N 9° 20' 19" W
1839449	2014-10-20 19:58:30 — 2014-11-05 01:58:31	49° 55' 27" N 4° 49' 38" W — 51° 42' 51" N 5° 58' 44" W
1839437	2014-10-20 19:58:27 — 2014-11-05 01:59:55	49° 55' 27" N 4° 49' 37" W — 51° 42' 32" N 5° 58' 52" W

58 Bottle station

Reference numbers
Total dissolved inorganic carbon (TCO2) concentration in the water column
Vertical spatial coordinates
Phaeopigment concentrations in the water column
Quality control flags
Alkalinity, acidity and pH of the water column
Chlorophyll pigment concentrations in water bodies

Reference numbers
Total dissolved inorganic carbon (TCO2) concentration in the water column
Vertical spatial coordinates
Phaeopigment concentrations in the water column
Quality control flags
Alkalinity, acidity and pH of the water column
Chlorophyll pigment concentrations in water bodies

BODC id	Date/Time	Location	Doc.
2097816	2014-10-27 03:53	58° 27' 0" N 7° 11' 24" W
2097877	2014-10-29 05:12	57° 37' 48" N 9° 42' 36" W
2097921	2014-10-30 17:05	56° 52' 11" N 9° 3' 36" W
2098021	2014-11-03 09:51	55° 22' 11" N 9° 44' 24" W
2113062	2014-10-24 08:51	58° 57' 36" N 6° 30' 0" W
2113074	2014-10-24 14:59	59° 12' 0" N 6° 57' 0" W
2113295	2014-11-01 18:12	56° 7' 11" N 10° 5' 59" W
2113363	2014-11-03 02:14	55° 12' 0" N 8° 30' 0" W
2097797	2014-10-24 14:59	59° 12' 0" N 6° 57' 0" W
2097804	2014-10-24 23:37	59° 23' 59" N 7° 19' 48" W
2113117	2014-10-27 12:34	58° 4' 47" N 8° 0' 35" W
2113130	2014-10-27 22:08	58° 13' 11" N 8° 49' 48" W
2113234	2014-10-30 11:00	56° 52' 11" N 8° 30' 0" W
2113283	2014-10-31 13:40	56° 52' 11" N 9° 41' 59" W
2113326	2014-11-02 10:00	56° 7' 11" N 8° 54' 0" W
2113375	2014-11-03 05:03	55° 22' 11" N 8° 54' 0" W
2097773	2014-10-23 11:05	58° 36' 0" N 5° 47' 59" W
2097889	2014-10-29 10:12	57° 37' 11" N 9° 23' 24" W
2097945	2014-10-31 13:40	56° 52' 11" N 9° 41' 59" W
2113049	2014-10-23 11:05	58° 36' 0" N 5° 47' 59" W
2113142	2014-10-28 14:02	58° 21' 35" N 9° 39' 36" W
2113271	2014-10-31 07:39	56° 52' 11" N 10° 5' 23" W
2113399	2014-10-28 01:31	58° 17' 23" N 9° 15' 0" W
2097785	2014-10-24 08:51	58° 57' 36" N 6° 30' 0" W
2097841	2014-10-27 22:08	58° 13' 11" N 8° 49' 48" W
2097853	2014-10-28 14:02	58° 21' 35" N 9° 39' 36" W
2097908	2014-10-30 08:49	56° 52' 48" N 8° 10' 47" W
2097982	2014-11-02 23:52	55° 22' 11" N 8° 5' 59" W
2113210	2014-10-30 01:47	57° 37' 11" N 8° 11' 23" W
2113246	2014-10-30 17:05	56° 52' 11" N 9° 3' 36" W
2113338	2014-11-02 15:24	56° 7' 11" N 8° 30' 0" W
2097865	2014-10-28 21:29	58° 25' 47" N 10° 4' 48" W
2097969	2014-11-01 23:01	56° 7' 11" N 9° 41' 59" W
2097970	2014-11-02 17:44	56° 7' 11" N 8° 5' 59" W
2113191	2014-10-29 21:29	57° 37' 11" N 8° 54' 0" W
2097890	2014-10-30 01:47	57° 37' 11" N 8° 11' 23" W
2097933	2014-10-31 07:39	56° 52' 11" N 10° 5' 23" W
2097957	2014-11-01 18:12	56° 7' 11" N 10° 5' 59" W
2097994	2014-11-03 17:33	55° 22' 11" N 10° 5' 59" W
2113154	2014-10-28 21:29	58° 25' 47" N 10° 4' 48" W
2113314	2014-11-02 06:27	56° 7' 11" N 9° 10' 47" W
2113387	2014-11-03 17:33	55° 22' 11" N 10° 5' 59" W
2113086	2014-10-24 23:37	59° 23' 59" N 7° 19' 48" W
2113098	2014-10-27 03:53	58° 27' 0" N 7° 11' 24" W
2113258	2014-10-30 21:50	56° 52' 11" N 9° 18' 0" W
2113302	2014-11-01 23:01	56° 7' 11" N 9° 41' 59" W
2113351	2014-11-02 23:52	55° 22' 11" N 8° 5' 59" W
2113418	2014-11-03 09:51	55° 22' 11" N 9° 44' 24" W
2097828	2014-10-27 09:57	58° 1' 12" N 7° 43' 11" W
2098008	2014-11-02 02:03	56° 7' 48" N 9° 41' 59" W
2113050	2014-10-23 18:12	58° 47' 59" N 6° 11' 24" W
2113105	2014-10-27 09:57	58° 1' 12" N 7° 43' 11" W
2113129	2014-10-27 17:39	58° 8' 59" N 8° 25' 11" W
2113166	2014-10-29 05:12	57° 37' 48" N 9° 42' 36" W
2113178	2014-10-29 10:12	57° 37' 11" N 9° 23' 24" W
2113209	2014-10-29 23:45	57° 37' 11" N 8° 30' 0" W
2113222	2014-10-30 08:49	56° 52' 48" N 8° 10' 47" W
2113406	2014-11-03 07:30	55° 22' 11" N 9° 18' 0" W

56 CTD/STD cast

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

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

BODC id	Date/Time	Location	Doc.
1811342	2014-10-27 03:20:42	58° 26' 47" N 7° 11' 36" W
1811514	2014-10-29 10:15	57° 37' 10" N 9° 23' 22" W
1811526	2014-10-29 21:31:16	57° 37' 18" N 8° 54' 2" W
1811667	2014-10-31 19:00:20	56° 52' 7" N 9° 41' 45" W
1811723	2014-11-02 06:28:18	56° 7' 9" N 9° 10' 36" W
1811249	2014-10-22 19:15:09	56° 34' 32" N 6° 28' 52" W
1811329	2014-10-24 18:46:32	59° 23' 51" N 7° 20' 17" W
1811330	2014-10-24 21:38:10	59° 23' 49" N 7° 19' 27" W
1811409	2014-10-27 16:56:36	58° 8' 57" N 8° 25' 3" W
1811502	2014-10-29 08:52:18	57° 37' 10" N 9° 23' 21" W
1811631	2014-10-30 21:52:25	56° 52' 11" N 9° 17' 54" W
1811760	2014-11-02 15:26:49	56° 7' 8" N 8° 30' 5" W
1811772	2014-11-02 17:46:06	56° 7' 10" N 8° 6' 8" W
1811784	2014-11-02 23:53:26	55° 22' 14" N 8° 5' 51" W
1811262	2014-10-23 11:09:45	58° 36' 7" N 5° 48' 8" W
1811298	2014-10-24 08:52:31	58° 57' 34" N 6° 30' 0" W
1811366	2014-10-27 09:19:25	58° 1' 21" N 7° 42' 56" W
1811410	2014-10-27 17:42:28	58° 8' 57" N 8° 25' 3" W
1811599	2014-10-30 16:14:10	56° 52' 11" N 9° 3' 30" W
1811711	2014-11-02 02:05:07	56° 7' 43" N 9° 42' 17" W
1811815	2014-11-03 07:31:39	55° 22' 15" N 9° 18' 10" W
1811563	2014-10-30 08:09:46	56° 52' 31" N 8° 10' 59" W
1811606	2014-10-30 17:07:55	56° 52' 11" N 9° 3' 31" W
1811618	2014-10-30 19:23:10	56° 52' 11" N 9° 17' 55" W
1811655	2014-10-31 13:45:10	56° 52' 21" N 9° 42' 14" W
1811692	2014-11-01 23:06:39	56° 7' 30" N 9° 42' 6" W
1811747	2014-11-02 10:01:32	56° 7' 17" N 8° 53' 52" W
1811796	2014-11-03 02:15:56	55° 22' 7" N 8° 30' 5" W
1811250	2014-10-23 10:29:24	58° 36' 7" N 5° 48' 8" W
1811274	2014-10-23 17:22:21	58° 48' 1" N 6° 11' 36" W
1811286	2014-10-23 18:14:48	58° 48' 1" N 6° 11' 36" W
1811471	2014-10-28 18:49:53	58° 26' 0" N 10° 4' 32" W
1811495	2014-10-29 05:15:50	57° 37' 33" N 9° 42' 27" W
1811759	2014-11-02 11:09:39	56° 7' 17" N 8° 53' 52" W
1811803	2014-11-03 05:04:36	55° 22' 11" N 8° 53' 58" W
1811827	2014-11-03 09:52:53	55° 22' 9" N 9° 44' 8" W
1811305	2014-10-24 13:39:57	59° 11' 46" N 6° 56' 57" W
1811354	2014-10-27 03:54:27	58° 26' 47" N 7° 11' 36" W
1811378	2014-10-27 10:01:56	58° 1' 21" N 7° 42' 56" W
1811391	2014-10-27 12:41:54	58° 4' 49" N 8° 0' 42" W
1811643	2014-10-31 07:40:06	56° 52' 12" N 10° 5' 34" W
1811840	2014-11-03 17:36:43	55° 22' 0" N 10° 6' 3" W
1811446	2014-10-28 01:32:03	58° 17' 20" N 9° 14' 52" W
1811483	2014-10-28 21:24:22	58° 26' 0" N 10° 4' 14" W
1811538	2014-10-29 23:47:16	57° 37' 17" N 8° 29' 59" W
1811551	2014-10-30 01:48:42	57° 36' 57" N 8° 11' 7" W
1811679	2014-11-01 05:30:37	56° 7' 17" N 10° 29' 55" W
1811735	2014-11-02 07:43:39	56° 7' 9" N 9° 10' 36" W
1811839	2014-11-03 15:01:26	55° 22' 0" N 10° 6' 2" W
1811317	2014-10-24 15:00:04	59° 11' 46" N 6° 56' 57" W
1811422	2014-10-27 21:13:02	58° 13' 24" N 8° 49' 54" W
1811434	2014-10-27 22:11:53	58° 13' 24" N 8° 49' 54" W
1811458	2014-10-28 14:05:34	58° 21' 49" N 9° 39' 45" W
1811575	2014-10-30 08:51:36	56° 52' 31" N 8° 10' 59" W
1811587	2014-10-30 11:02:29	56° 52' 13" N 8° 30' 0" W
1811680	2014-11-01 18:15:25	56° 7' 18" N 10° 5' 59" W

2 Pumped water sample

Horizontal spatial co-ordinates
Date and time
Phosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Alkalinity, acidity and pH of the water column

Horizontal spatial co-ordinates
Date and time
Phosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Alkalinity, acidity and pH of the water column

BODC id	Date/Time	Location	Doc.
2113431	2014-10-21 07:22 — 2014-10-29 20:05	51° 25' 59" N 9° 43' 0" W — 58° 57' 34" N 5° 34' 12" W
2128903	2014-10-23 16:41 — 2014-11-03 18:15	55° 21' 21" N 10° 28' 33" W — 59° 20' 34" N 6° 8' 54" W

Discrete samples

49 All plastic clean surface pumped supply

Phosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column

34 CTD frame plus rosette sampler

Total dissolved inorganic carbon (TCO2) concentration in the water column
Particulate total and organic nitrogen concentrations in the water column
Phosphate concentration parameters in the water column
Salinity of the water column
Silicate concentration parameters in the water column
Particulate inorganic carbon concentrations in the water column
Particulate total and organic phosphorus concentrations in the water column
Nitrate concentration parameters in the water column
Concentration of silicon species in the water column
Alkalinity, acidity and pH of the water column
Particulate total and organic carbon concentrations in the water column

41 Sample taken from ship's non-toxic supply

Alkalinity, acidity and pH of the water column

17 WP-2 zooplankton net

22

Particulate total and organic nitrogen concentrations in the water column
Phosphate concentration parameters in the water column
Salinity of the water column
Silicate concentration parameters in the water column
Particulate inorganic carbon concentrations in the water column
Particulate total and organic phosphorus concentrations in the water column
Nitrate concentration parameters in the water column
Concentration of silicon species in the water column
Particulate total and organic carbon concentrations in the water column

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Tel +44 (0) 782 512 0946

Email enquiries@bodc.ac.uk

British Oceanographic Data Centre
National Oceanography Centre
Joseph Proudman Building
6 Brownlow Street
Liverpool
L3 5DA
United Kingdom

British Oceanographic Data Centre
National Oceanography Centre
European Way
Southampton
SO14 3ZH
United Kingdom