Cruise inventory

RRS Challenger CH62A

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Challenger (74CH)
Cruise identifierCH62A
Cruise period1989-10-23 — 1989-11-03
StatusCompleted
Port of departureGreat Yarmouth, United Kingdom
Port of returnCardiff, United Kingdom
PurposeResearch
Objectives1. To measure the concentrations and investigate the spatial distribution of the major nutrients: Nitrate, Nitrite, Ammonia, Silicate, Urea and Phosphate. Particular emphasis is being placed on these distributions in the sea area influenced by major European estuaries flowing into the North Sea.
2. To establish the relationships, and contribution of, these nutrient species to the formation of phytoplankton blooms. Specific attention will be paid to the contributions made by ammonia, phosphate and urea.
3. To carry out on-board mixing experiments using estuarine and offshore water samples.
4. To carry out deep gravity coring in order to study the historical record of Eutrophication using 15N, 13C and 14C compounds and other isotope dating techniques.
5. To investigate the distributions of chlorophyll and particulate organic carbon and nitrogen within the study area.
6. To study the primary production and assimilation rates of the phytoplankton using 32P. 14C and 15N tracers.
7. To investigate bacterial production using 3H-thymidine and methane oxidising bacteria using 14CH4/
8. To investigate the influence of benthic macrofauna on re-suspension of particulate matter of two contrasting sites of the North Sea.
Chief scientistNick Owens (Plymouth Marine Laboratory)
ProjectNERC North Sea Blooms
Coordinating bodyNERC
Cruise reportRRS Challenger CH62A cruise report ch62a_89.pdf — access key 'C' (0.66 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificNorth Sea
Track chartsRRS Challenger CH62A cruise track — trk3487.html
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 2592.8
Water bottle stationsQuantity: number of stations = 13
CTD stationsQuantity: number of stations = 13
Subsurface temperature and salinity measurementsQuantity: track kilometres = 2592.8
Transparency (eg transmissometer)Quantity: track kilometres = 2592.8
Optics (eg underwater light levels)Quantity: number of stations = 13
Chemical oceanography 
OxygenQuantity: track kilometres = 2592.8
PhosphateQuantity: track kilometres = 2592.8
Description: measuring concentrations and spatial distribution.
NitrateQuantity: track kilometres = 2592.8
Description: measuring concentrations and spatial distribution.
NitriteQuantity: track kilometres = 2592.8
Description: measuring concentrations and spatial distribution.
AmmoniaQuantity: track kilometres = 2592.8
Description: dissolved, measuring concentrations and spatial distribution.
SilicateQuantity: track kilometres = 2592.8
Description: measuring concentrations and spatial distribution.
Contamination 
Suspended matterQuantity: number of stations = 56
Other dissolved substancesQuantity: number of stations = 56
Description: organic P
Biology and fisheries 
Primary productivityQuantity: number of stations = 56
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 56
Description: 1400 nautical miles
Particulate organic matter (inc POC, PON)Quantity: number of samples = 112
SestonQuantity: number of stations = 56
Pelagic bacteria/micro-organismsQuantity: number of stations = 30
Description: distribution,biomass determination,energy transfers
Meteorology 
Incident radiationQuantity: track kilometres = 2963.2
Occasional standard measurementsQuantity: number of measurements = 40
Geology and geophysics 
Core - soft bottomQuantity: number of cores = 11
Description: deep gravity coring to study historical record of eutrophication.
Data held at BODC 
Series/Profiles 
9  Bottle station
Quality control flags
Chlorophyll pigment concentrations in water bodies
Vertical spatial coordinates
Reference numbers
Quality control flags
Chlorophyll pigment concentrations in water bodies
Vertical spatial coordinates
Reference numbers

BODC idDate/TimeLocationDoc.
16910671989-10-24 17:41 54° 8' 58" N  0° 4' 19" E  View metadata report for BODC series reference number 1691067
16910791989-10-25 08:57 54° 40' 16" N  1° 6' 6" W  View metadata report for BODC series reference number 1691079
16910801989-10-25 17:41 53° 54' 21" N  0° 0' 13" W  View metadata report for BODC series reference number 1691080
16910921989-10-26 09:12 53° 6' 6" N  2° 57' 21" E  View metadata report for BODC series reference number 1691092
16911111989-10-26 16:38 53° 55' 24" N  2° 21' 1" E  View metadata report for BODC series reference number 1691111
16911231989-10-28 16:36 53° 59' 7" N  7° 45' 59" E  View metadata report for BODC series reference number 1691123
16911351989-11-01 10:03 52° 8' 40" N  1° 47' 9" E  View metadata report for BODC series reference number 1691135
16911471989-11-01 17:10 51° 57' 29" N  1° 46' 43" E  View metadata report for BODC series reference number 1691147
16911591989-11-02 00:18 51° 25' 22" N  1° 24' 59" E  View metadata report for BODC series reference number 1691159
13  CTD/STD cast
Density of the water column
Transmittance and attenuance of the water column
Visible waveband radiance and irradiance measurements in the water column
Chlorophyll pigment concentrations in water bodies
Vertical spatial coordinates
Salinity of the water column
Concentration of suspended particulate material in the water column
Temperature of the water column
Density of the water column
Transmittance and attenuance of the water column
Visible waveband radiance and irradiance measurements in the water column
Chlorophyll pigment concentrations in water bodies
Vertical spatial coordinates
Salinity of the water column
Concentration of suspended particulate material in the water column
Temperature of the water column

BODC idDate/TimeLocationDoc.
8224711989-10-24 09:34 53° 32' 25" N  0° 59' 10" E  View metadata report for BODC series reference number 822471
8224831989-10-24 17:35 54° 8' 58" N  0° 4' 19" E  View metadata report for BODC series reference number 822483
8224951989-10-25 08:51 54° 40' 16" N  1° 6' 6" W  View metadata report for BODC series reference number 822495
8225021989-10-25 17:35 53° 54' 20" N  0° 0' 13" W  View metadata report for BODC series reference number 822502
8225141989-10-26 09:05 53° 6' 6" N  2° 57' 21" E  View metadata report for BODC series reference number 822514
8225261989-10-26 16:34 53° 55' 24" N  2° 21' 1" E  View metadata report for BODC series reference number 822526
8225381989-10-27 05:05 54° 34' 58" N  4° 50' 28" E  View metadata report for BODC series reference number 822538
8225511989-10-27 12:05 54° 35' 0" N  4° 48' 11" E  View metadata report for BODC series reference number 822551
8225631989-10-28 09:47 54° 50' 46" N  8° 0' 11" E  View metadata report for BODC series reference number 822563
8225751989-10-28 16:30 53° 59' 7" N  7° 45' 59" E  View metadata report for BODC series reference number 822575
8225871989-11-01 09:57 52° 8' 40" N  1° 47' 10" E  View metadata report for BODC series reference number 822587
8225991989-11-01 17:05 51° 57' 28" N  1° 46' 43" E  View metadata report for BODC series reference number 822599
8226061989-11-02 00:13 51° 25' 22" N  1° 24' 58" E  View metadata report for BODC series reference number 822606
1  Meteorological data logger
Horizontal spatial co-ordinates
Date and time
Visible waveband radiance and irradiance measurements in the atmosphere
Horizontal spatial co-ordinates
Date and time
Visible waveband radiance and irradiance measurements in the atmosphere

BODC idDate/TimeLocationDoc.
9532861989-10-23 18:30  — 1989-11-02 07:30 50° 52' 41" N  1° 21' 56" W — 55° 14' 8" N  8° 14' 44" E  View metadata report for BODC series reference number 953286
1  Ship's non-toxic supply
Ammonium and ammonia concentration parameters in water bodies
Transmittance and attenuance of the water column
Chlorophyll pigment concentrations in water bodies
Silicate concentration parameters in the water column
Salinity of the water column
Horizontal spatial co-ordinates
Concentration of suspended particulate material in the water column
Nitrate concentration parameters in the water column
Temperature of the water column
Date and time
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Ammonium and ammonia concentration parameters in water bodies
Transmittance and attenuance of the water column
Chlorophyll pigment concentrations in water bodies
Silicate concentration parameters in the water column
Salinity of the water column
Horizontal spatial co-ordinates
Concentration of suspended particulate material in the water column
Nitrate concentration parameters in the water column
Temperature of the water column
Date and time
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column

BODC idDate/TimeLocationDoc.
9532981989-10-23 18:30  — 1989-11-02 07:30 50° 52' 41" N  1° 21' 56" W — 55° 14' 8" N  8° 14' 44" E  View metadata report for BODC series reference number 953298
1  Single-beam echosounder
Bathymetry and Elevation
Horizontal spatial co-ordinates
Date and time
Bathymetry and Elevation
Horizontal spatial co-ordinates
Date and time

BODC idDate/TimeLocationDoc.
9532741989-10-23 18:30  — 1989-11-02 07:30 50° 52' 41" N  1° 21' 56" W — 55° 14' 8" N  8° 14' 44" E  View metadata report for BODC series reference number 953274
Discrete samples 
13  CTD frame plus rosette samplerDensity of the water column
Transmittance and attenuance of the water column
Visible waveband radiance and irradiance measurements in the water column
Chlorophyll pigment concentrations in water bodies
Salinity of the water column
Concentration of suspended particulate material in the water column
Temperature of the water column
48  Sample taken from ship's non-toxic supplyConcentration of suspended particulate material in the water column