Cruise inventory

RRS James Cook JC025

Cruise summary report

Cruise inventory

Cruise Info. 
Cruise period2008-07-02 — 2008-07-27
StatusCompleted
Port of departureSouthampton, United Kingdom
Port of returnFalmouth, United Kingdom
PurposeResearch
ObjectivesThe overall cruise objective was to investigate the impacts of a large seabed bank (Jones Bank, Celtic Sea) on the physical, chemical, biological and ecological characteristics of a stratified shelf sea. Previous evidence (cruise CD173, July/August 2005) had indicated the bank to be a site of enhanced sub-surface mixing.

This cruise aimed to determine the physical processes driving that mixing, and the consequences for (1) nutrient supply to the thermocline phytoplankton, (2) growth and distribution of the phytoplankton, (3) distributions of zooplankton, (4) sediment biochemistry, (5) fish distributions and behaviour, and (6) seabird and marine mammal distributions and behaviour.

The vessel sailed from Southampton at 1800 on 2/7/08, and spent most of 3/7/08 conducting EK60 calibrations near Portland. Once out at Jones Bank moorings were deployed (hampered by some unseasonably rough weather), followed by a series of station occupations (turbulence, biochemistry), dye release experiments, Scanfish surveys, and seabed grabs and cores. Observations for fish (EK60) and seabirds/mammals (visual) were made throughout the cruise. Towards the end of the cruise 2 Newquay fishing vessels carried out some fishing for us. Moorings were recovered around July 22/24, followed by 3 CTD stations across the shelf edge to the south of Jones Bank. The vessel docked in Falmouth on 27/7/08.
Chief scientistJonathan Sharples (Proudman Oceanographic Laboratory)
ProjectOceans2025
Coordinating bodyThe Oceans2025 partnership
Cruise reportRRS James Cook JC025 cruise report jc025.pdf — access key 'C' (2.79 MB) 
Ocean/sea areas 
GeneralCeltic Sea
SpecificJones Bank
Track chartsRRS James Cook JC025 cruise track — jc025trk.pdf (0.19 MB) 
Measurements 
Physical oceanography 
CTD stationsQuantity: number of profiles = 43
Description: Seabird 911 CTD, parameters C, T, D, chl fluorescence, transmittance, dissolved oxygen, LADCP. Bottle samples taken for chemical/biological analysis. All analyses did not occur on all CTDs.
Subsurface temperature and salinity measurementsQuantity: track kilometres = 1800
Description: Scanfish and Moving Vessel Profiler C, T, D, chlorophyll fluorescence. Most of this distance occured during repeated 26km circuits and the 2 dye release experiments.
Subsurface temperature measurementsQuantity: activity duration in hours = 175
Description: Vertical array of T and Chl loggers, suspended from vessel mainly during station work with turbulence profiler.
Other physical oceanographic measurementsQuantity: number of profiles
Description: Vertical profiles with free-fall shear probe (with C, T, D, chl fluorescence, dissolved oxygen).
Other physical oceanographic measurementsQuantity: number of deployments = 2
Description: Rhodamine dye releases in to the thermocline, tracked using a towed fluorometer to measure dispersion rates.
Chemical oceanography 
PhosphateQuantity: number of profiles = 43
Description: Seabird 911 CTD, parameters C, T, D, chl fluorescence, transmittance, dissolved oxygen, LADCP. Bottle samples taken for chemical/biological analysis. All analyses did not occur on all CTDs.
NitrateQuantity: number of profiles = 43
Description: Seabird 911 CTD, parameters C, T, D, chl fluorescence, transmittance, dissolved oxygen, LADCP. Bottle samples taken for chemical/biological analysis. All analyses did not occur on all CTDs.
SilicateQuantity: number of profiles = 43
Description: Seabird 911 CTD, parameters C, T, D, chl fluorescence, transmittance, dissolved oxygen, LADCP. Bottle samples taken for chemical/biological analysis. All analyses did not occur on all CTDs.
Biology and fisheries 
Primary productivityQuantity: number of profiles = 43
Description: Seabird 911 CTD, parameters C, T, D, chl fluorescence, transmittance, dissolved oxygen, LADCP. Bottle samples taken for chemical/biological analysis. All analyses did not occur on all CTDs.
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: activity duration in hours = 175
Description: Vertical array of T and Chl loggers, suspended from vessel mainly during station work with turbulence profiler.
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of profiles = 43
Description: Seabird 911 CTD, parameters C, T, D, chl fluorescence, transmittance, dissolved oxygen, LADCP. Bottle samples taken for chemical/biological analysis. All analyses did not occur on all CTDs.
PhytoplanktonQuantity: number of profiles = 43
Description: Seabird 911 CTD, parameters C, T, D, chl fluorescence, transmittance, dissolved oxygen, LADCP. Bottle samples taken for chemical/biological analysis. All analyses did not occur on all CTDs.
ZooplanktonQuantity: number of hauls = 12
Description: Bongo net hauls for zooplankton identification (3 replicates per haul).
Pelagic bacteria/micro-organismsQuantity: number of deployments = 5
Description: Stand-alone pump deployments for bacteria sampling.
Benthic bacteria/micro-organismsQuantity: number of cores = 5
Description: Megacore sampling, usually done in groups of 3. Sediments used for later microbial activity analysis.
BirdsQuantity: activity duration in days = 23
Description: Seabird/mammal observers.
Mammals and reptilesQuantity: activity duration in days = 23
Description: Seabird/mammal observers.
Acoustic reflection on marine organisms.Quantity: activity duration in days = 24
Description: EK60 fisheries echo sounder operation
Geology and geophysics 
GrabQuantity: number of samples = 10
Description: Day grab of surface sediments. Analysed for microbes and meiofauna.
Core - soft bottomQuantity: number of cores = 5
Description: Megacore sampling, usually done in groups of 3. Sediments used for later microbial activity analysis.
Moorings, landers, buoys 
Physical oceanography 
Subsurface temperature measurements49° 56' 29" N  7° 48' 53" W — Seabed 300kHz ADCP, T loggers every 2 - 10m from bed to surface, near-surface and nearbed T-salinity loggers. Deployed 2330 UTC 03/07/2008; ADCP recovered 22/7/08, T loggers recovered 23/7/08.
Subsurface temperature measurements49° 53' 47" N  7° 52' 30" W — Seabed 300kHz ADCP, T loggers every 2 - 10m from bed to surface, near-surface and nearbed T-salinity loggers. Deployed 0300 UTC 05/07/2008; T loggers recovered 23/7/08, ADCP recovered 24/7/08.
Subsurface temperature measurements49° 51' 11" N  7° 56' 47" W — Seabed 300kHz ADCP, T loggers every 2 - 10m from bed to surface, near-surface and nearbed T-salinity loggers. Deployed 1600 UTC 05/07/2008; all recovered 24/7/08.
Current profiler (eg ADCP)49° 56' 29" N  7° 48' 53" W — Seabed 300kHz ADCP, T loggers every 2 - 10m from bed to surface, near-surface and nearbed T-salinity loggers. Deployed 2330 UTC 03/07/2008; ADCP recovered 22/7/08, T loggers recovered 23/7/08.
Current profiler (eg ADCP)49° 45' 0" N  7° 40' 5" W — Nearbed 300kHz ADCP. Deployed 1830 UTC 05/07/2008; recovered 23/7/08.
Current profiler (eg ADCP)49° 51' 11" N  7° 56' 47" W — Seabed 300kHz ADCP, T loggers every 2 - 10m from bed to surface, near-surface and nearbed T-salinity loggers. Deployed 1600 UTC 05/07/2008; all recovered 24/7/08.
Current profiler (eg ADCP)49° 53' 47" N  7° 52' 30" W — Seabed 300kHz ADCP, T loggers every 2 - 10m from bed to surface, near-surface and nearbed T-salinity loggers. Deployed 0300 UTC 05/07/2008; T loggers recovered 23/7/08, ADCP recovered 24/7/08.
Surface drifters/drifting buoys49° 54' 18" N  7° 51' 47" W — Drifting buoys, tracked by GPS/Iridium email link. 1 buoy deployed 9/7/08 and recovered 14/7/08. 2 buoys deployed 17/7/08 and left out.
Biology and fisheries 
Demersal fish49° 45' 0" N  7° 40' 5" W — Seabed camera, baited, deployed typically for 24 hours.
Demersal fish49° 56' 29" N  7° 48' 53" W — Seabed camera, baited, deployed typically for 24 hours.
Demersal fish49° 53' 47" N  7° 52' 30" W — Seabed camera, baited, deployed typically for 24 hours.
Demersal fish49° 51' 11" N  7° 56' 47" W — Seabed camera, baited, deployed typically for 24 hours.
Data held at BODC 
Series/Profiles 
10  CTD in towed or autonomous underwater vehicle

BODC idDate/TimeLocationDoc.
10298152008-07-13 06:29:14  — 2008-07-14 03:28:21 49° 44' 42" N  7° 39' 55" W — 49° 48' 39" N  7° 39' 55" W  View metadata report for BODC series reference number 1029815
10298272008-07-15 13:48:15  — 2008-07-16 16:15:01 49° 55' 36" N  7° 47' 37" W — 49° 58' 11" N  7° 47' 37" W  View metadata report for BODC series reference number 1029827
10298392008-07-20 04:07:47  — 2008-07-20 22:21:17 49° 42' 55" N  7° 36' 11" W — 49° 57' 24" N  7° 36' 11" W  View metadata report for BODC series reference number 1029839
10298402008-07-25 21:55:42  — 2008-07-26 18:19:16 47° 54' 15" N  9° 42' 56" W — 49° 59' 40" N  9° 42' 56" W  View metadata report for BODC series reference number 1029840
10298522008-07-09 22:01:17  — 2008-07-10 01:18:29 49° 56' 42" N  7° 44' 33" W — 49° 53' 2" N  7° 45' 53" W  View metadata report for BODC series reference number 1029852
10298642008-07-11 14:12:07  — 2008-07-11 23:14:06 49° 47' 14" N  7° 51' 40" W — 49° 47' 11" N  7° 50' 33" W  View metadata report for BODC series reference number 1029864
10298762008-07-17 06:52:53  — 2008-07-17 11:57:56 49° 57' 41" N  7° 37' 1" W — 49° 53' 2" N  7° 50' 0" W  View metadata report for BODC series reference number 1029876
10298882008-07-17 16:04:10  — 2008-07-17 22:15:17 49° 55' 53" N  7° 41' 31" W — 49° 53' 0" N  7° 50' 12" W  View metadata report for BODC series reference number 1029888
10299072008-07-18 05:38:18  — 2008-07-18 11:42:33 49° 54' 24" N  7° 46' 23" W — 49° 50' 44" N  7° 54' 22" W  View metadata report for BODC series reference number 1029907
10299192008-07-18 17:27:56  — 2008-07-18 23:44:02 49° 54' 16" N  7° 37' 54" W — 49° 55' 8" N  7° 49' 1" W  View metadata report for BODC series reference number 1029919
27  Water temperature and/or salinity monitor
Date and time
Horizontal spatial co-ordinates
Temperature of the water column
Reference numbers
Vertical spatial coordinates
Date and time
Horizontal spatial co-ordinates
Temperature of the water column
Reference numbers
Vertical spatial coordinates

BODC idDate/TimeLocationDoc.
10292982008-07-06 13:50  — 2008-07-07 15:00 49° 53' 52" N  7° 51' 55" W — 49° 53' 54" N  7° 52' 16" W  View metadata report for BODC series reference number 1029298
10293052008-07-14 11:41  — 2008-07-15 03:57:30 49° 53' 51" N  7° 51' 51" W — 49° 53' 33" N  7° 52' 24" W  View metadata report for BODC series reference number 1029305
10293172008-07-21 07:30  — 2008-07-22 09:37:30 49° 53' 36" N  7° 52' 22" W — 49° 53' 42" N  7° 52' 46" W  View metadata report for BODC series reference number 1029317
10293292008-07-06 13:50  — 2008-07-07 15:00:30 49° 53' 52" N  7° 51' 55" W — 49° 53' 54" N  7° 52' 16" W  View metadata report for BODC series reference number 1029329
10293302008-07-14 11:41  — 2008-07-15 03:57:30 49° 53' 51" N  7° 51' 51" W — 49° 53' 33" N  7° 52' 24" W  View metadata report for BODC series reference number 1029330
10293422008-07-21 07:30  — 2008-07-22 09:37:30 49° 53' 36" N  7° 52' 22" W — 49° 53' 42" N  7° 52' 46" W  View metadata report for BODC series reference number 1029342
10293542008-07-06 13:50  — 2008-07-07 15:00:30 49° 53' 52" N  7° 51' 55" W — 49° 53' 54" N  7° 52' 16" W  View metadata report for BODC series reference number 1029354
10293662008-07-14 11:41  — 2008-07-15 03:57:30 49° 53' 51" N  7° 51' 51" W — 49° 53' 33" N  7° 52' 24" W  View metadata report for BODC series reference number 1029366
10293782008-07-21 07:30  — 2008-07-22 09:37:30 49° 53' 36" N  7° 52' 22" W — 49° 53' 42" N  7° 52' 46" W  View metadata report for BODC series reference number 1029378
10293912008-07-06 13:50  — 2008-07-07 15:00:30 49° 53' 52" N  7° 51' 55" W — 49° 53' 54" N  7° 52' 16" W  View metadata report for BODC series reference number 1029391
10294092008-07-14 11:41  — 2008-07-15 03:57:30 49° 53' 51" N  7° 51' 51" W — 49° 53' 33" N  7° 52' 24" W  View metadata report for BODC series reference number 1029409
10294102008-07-21 07:30  — 2008-07-22 09:37:30 49° 53' 36" N  7° 52' 22" W — 49° 53' 42" N  7° 52' 46" W  View metadata report for BODC series reference number 1029410
10294222008-07-06 13:50  — 2008-07-07 15:00:30 49° 53' 52" N  7° 51' 55" W — 49° 53' 54" N  7° 52' 16" W  View metadata report for BODC series reference number 1029422
10294342008-07-14 11:41  — 2008-07-15 03:57:30 49° 53' 51" N  7° 51' 51" W — 49° 53' 33" N  7° 52' 24" W  View metadata report for BODC series reference number 1029434
10294462008-07-21 07:30  — 2008-07-22 09:37:30 49° 53' 36" N  7° 52' 22" W — 49° 53' 42" N  7° 52' 46" W  View metadata report for BODC series reference number 1029446
10294582008-07-06 13:50  — 2008-07-07 15:00:30 49° 53' 52" N  7° 51' 55" W — 49° 53' 54" N  7° 52' 16" W  View metadata report for BODC series reference number 1029458
10294712008-07-14 11:41  — 2008-07-15 03:57:30 49° 53' 51" N  7° 51' 51" W — 49° 53' 33" N  7° 52' 24" W  View metadata report for BODC series reference number 1029471
10294832008-07-21 07:30  — 2008-07-22 09:37:30 49° 53' 36" N  7° 52' 22" W — 49° 53' 42" N  7° 52' 46" W  View metadata report for BODC series reference number 1029483
10294952008-07-06 13:50  — 2008-07-07 15:00:30 49° 53' 52" N  7° 51' 55" W — 49° 53' 54" N  7° 52' 16" W  View metadata report for BODC series reference number 1029495
10295022008-07-14 11:41  — 2008-07-15 03:57:30 49° 53' 51" N  7° 51' 51" W — 49° 53' 33" N  7° 52' 24" W  View metadata report for BODC series reference number 1029502
10295142008-07-21 07:30  — 2008-07-22 09:37:30 49° 53' 36" N  7° 52' 22" W — 49° 53' 42" N  7° 52' 46" W  View metadata report for BODC series reference number 1029514
10295262008-07-06 13:50  — 2008-07-07 15:00:30 49° 53' 52" N  7° 51' 55" W — 49° 53' 54" N  7° 52' 16" W  View metadata report for BODC series reference number 1029526
10295382008-07-14 11:41  — 2008-07-15 03:57:30 49° 53' 51" N  7° 51' 51" W — 49° 53' 33" N  7° 52' 24" W  View metadata report for BODC series reference number 1029538
10295512008-07-21 07:30  — 2008-07-22 09:37:30 49° 53' 36" N  7° 52' 22" W — 49° 53' 42" N  7° 52' 46" W  View metadata report for BODC series reference number 1029551
10295632008-07-06 13:50  — 2008-07-07 15:00:30 49° 53' 52" N  7° 51' 55" W — 49° 53' 54" N  7° 52' 16" W  View metadata report for BODC series reference number 1029563
10295752008-07-14 11:41  — 2008-07-15 03:57:30 49° 53' 51" N  7° 51' 51" W — 49° 53' 33" N  7° 52' 24" W  View metadata report for BODC series reference number 1029575
10295872008-07-21 07:30  — 2008-07-22 09:37:30 49° 53' 36" N  7° 52' 22" W — 49° 53' 42" N  7° 52' 46" W  View metadata report for BODC series reference number 1029587
Discrete samples 
31  CTD frame plus rosette samplerPhosphate concentration parameters in the water column
Silicate concentration parameters in the water column
Ammonium concentration parameters in the water column
Nitrate concentration parameters in the water column