Cruise inventory

RRS Charles Darwin CD61

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Charles Darwin (74AB)
Cruise identifierCD61
Cruise period1991-07-06 — 1991-07-29
StatusCompleted
Port of departureTroon, United Kingdom
Port of returnBarry, United Kingdom
PurposeResearch
ObjectivesA) To determine rates of coccolithophore photosynthesis and calcification in relation to the stage of development and species composition of the annual bloom in the S. Iceland basin.
B) To measure water column primary production and specific phytoplankton growth rates within and outside the coccolithophore bloom, using fractionation techniques to estimate the relative importance of different size groups of autotrophic cells.
C) To measure rates of grazing on coccolithophores by herbivorous meso- and micro-plankton with special attention to grazing efficiency with respect to the size and density of coccolithophore cells and to the nature (composition, pellet size anddensity etc.) of faecal material.
D) To measure sedimentation rates and particle characteristics throughout the deep water column, both within and outside a coccolithophore bloom, using drifting sediment traps, stand-alone pumps, camera systems and large-volume water bottles.
E) To identify elements of the protozoan community involved in coccolithophore aggregate remineralisation, and to determine the relative importance of bacteria and protozoa on the degradation and transformation of aggregates.
F) To determine the primary production rates of alkenones and other primary produced biomarkers in relation to coccolithophore production, and to determine the export flux of biomarkers relative to POC flux, and their relative loss through the water column.
Chief scientistRoger Harris (Plymouth Marine Laboratory)
ProjectBiogeochemical Ocean Flux Study (BOFS)/UK contr. to JGOFS
Coordinating bodyNERC
Cruise reportRRS Charles Darwin CD61 cruise report cd61.pdf — access key 'C' (4.31 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
Specificcentred on 61N, 20W
Track chartsRRS Charles Darwin CD61 cruise track — cd61track.pdf (00 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Description: cont. T,S,O2,fluorescence,transmittance,nutrients,pCO2
BathythermographQuantity: number of profiles = 50
Water bottle stationsQuantity: number of profiles = 30
Description: 3 with T only
CTD stationsQuantity: number of profiles = 57
Chemical oceanography 
OxygenQuantity: number of profiles = 57
Description: 21 samples
PhosphateDescription: nutrient uptake experiments
NitrateQuantity: number of profiles = 9
Description: 84 samples
NitrateDescription: nutrient uptake experiments
NitriteDescription: nutrient uptake experiments
SilicateQuantity: number of profiles = 9
Description: 84 samples
IsotopesQuantity: number of deployments = 13
Description: SAPs - stable carbon and nitrogen isotopes
IsotopesQuantity: number of samples = 11
Description: surface water filtrations - parameters as for SAPs
Biology and fisheries 
Primary productivityQuantity: number of experiments = 12
Description: 14C technique
Primary productivityQuantity: number of samples = 121
Description: bacterial production and numbers
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 21
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 12
Description: 350 samples
Particulate organic matter (inc POC, PON)Quantity: number of deployments = 13
Description: SAPs - particulate carbon, nitrogen, calcium, barium
Particulate organic matter (inc POC, PON)Quantity: number of samples = 350
Particulate organic matter (inc POC, PON)Quantity: number of samples = 11
Description: surface water filtrations - parameters as for SAPs
Biochemical measurements (eg lipids, amino acids)Quantity: number of samples = 164
Description: molecular biology calcification, O2 primary prod,eukaryote/prokaryote DNA/RNA
Biochemical measurements (eg lipids, amino acids)Quantity: number of samples = 11
Description: surface water filtrations, parameteres as for SAPs
Biochemical measurements (eg lipids, amino acids)Quantity: number of deployments = 13
Description: Stand Alone Pumps (SAPS) - lipid biomarkers,molecular genetics,pigments
Biochemical measurements (eg lipids, amino acids)Quantity: number of samples = 21
Description: underway filtrations - lipd biomarkers, pigments, molecular genetic studies
PhytoplanktonQuantity: number of samples = 350
PhytoplanktonQuantity: number of samples = 11
Description: species composition, coccolithophoroid cell isolations and cultures
ZooplanktonQuantity: number of samples = 73
Description: mesozooplankton sampling, grazing and biomass
Geology and geophysics 
Core - soft bottomQuantity: number of deployments = 4
Description: multicorer
Data held at BODC 
Series/Profiles 
9  Bottle station
Quality control flags
Silicate concentration parameters in the water column
Vertical spatial coordinates
Nitrate concentration parameters in the water column
Reference numbers
Quality control flags
Silicate concentration parameters in the water column
Vertical spatial coordinates
Nitrate concentration parameters in the water column
Reference numbers

BODC idDate/TimeLocationDoc.
12325731991-07-18 01:52 61° 12' 36" N  19° 34' 19" W  View metadata report for BODC series reference number 1232573
12326651991-07-24 11:46 62° 30' 7" N  20° 0' 3" W  View metadata report for BODC series reference number 1232665
12326041991-07-18 05:38 61° 14' 38" N  19° 32' 3" W  View metadata report for BODC series reference number 1232604
12326161991-07-18 08:25 61° 15' 37" N  19° 31' 55" W  View metadata report for BODC series reference number 1232616
12326281991-07-22 13:49 61° 40' 5" N  19° 5' 30" W  View metadata report for BODC series reference number 1232628
12326411991-07-23 20:40 62° 29' 52" N  19° 59' 42" W  View metadata report for BODC series reference number 1232641
12326531991-07-23 22:01 62° 29' 35" N  19° 59' 30" W  View metadata report for BODC series reference number 1232653
12325851991-07-13 13:29 61° 3' 50" N  19° 57' 10" W  View metadata report for BODC series reference number 1232585
12325971991-07-14 09:59 61° 8' 38" N  19° 35' 38" W  View metadata report for BODC series reference number 1232597
57  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
Temperature of the water column
Dissolved oxygen parameters in 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
Temperature of the water column
Dissolved oxygen parameters in the water column

BODC idDate/TimeLocationDoc.
9584871991-07-12 04:39 61° 4' 51" N  20° 0' 0" W  View metadata report for BODC series reference number 958487
9584991991-07-12 08:37 61° 32' 23" N  20° 37' 28" W  View metadata report for BODC series reference number 958499
9585061991-07-12 12:29 61° 32' 59" N  19° 30' 3" W  View metadata report for BODC series reference number 958506
9585181991-07-12 19:52 60° 32' 50" N  20° 33' 32" W  View metadata report for BODC series reference number 958518
9585311991-07-12 23:39 60° 33' 9" N  19° 23' 51" W  View metadata report for BODC series reference number 958531
9585431991-07-13 04:36 61° 4' 43" N  19° 59' 42" W  View metadata report for BODC series reference number 958543
9585551991-07-13 11:11 61° 4' 16" N  19° 59' 36" W  View metadata report for BODC series reference number 958555
9585671991-07-14 05:10 61° 5' 52" N  19° 36' 44" W  View metadata report for BODC series reference number 958567
9585791991-07-14 05:39 61° 6' 6" N  19° 36' 50" W  View metadata report for BODC series reference number 958579
9585801991-07-14 07:20 61° 7' 21" N  19° 36' 33" W  View metadata report for BODC series reference number 958580
9585921991-07-14 08:55 61° 8' 38" N  19° 35' 39" W  View metadata report for BODC series reference number 958592
9586111991-07-14 12:38 61° 9' 52" N  19° 33' 15" W  View metadata report for BODC series reference number 958611
9586231991-07-15 05:20 61° 16' 39" N  19° 39' 37" W  View metadata report for BODC series reference number 958623
9586351991-07-15 11:43 61° 17' 2" N  19° 46' 55" W  View metadata report for BODC series reference number 958635
9586471991-07-16 04:21 61° 11' 46" N  19° 59' 36" W  View metadata report for BODC series reference number 958647
9586591991-07-16 06:22 61° 11' 5" N  20° 1' 24" W  View metadata report for BODC series reference number 958659
9586601991-07-16 09:39 61° 11' 39" N  20° 2' 44" W  View metadata report for BODC series reference number 958660
9586721991-07-16 23:00 61° 8' 12" N  20° 5' 3" W  View metadata report for BODC series reference number 958672
9586841991-07-17 03:10 61° 5' 17" N  19° 49' 31" W  View metadata report for BODC series reference number 958684
9586961991-07-17 12:09 61° 6' 54" N  19° 40' 23" W  View metadata report for BODC series reference number 958696
9587031991-07-17 17:07 61° 8' 31" N  19° 33' 7" W  View metadata report for BODC series reference number 958703
9587151991-07-17 23:44 61° 10' 42" N  19° 27' 0" W  View metadata report for BODC series reference number 958715
9587271991-07-18 03:33 61° 13' 51" N  19° 33' 12" W  View metadata report for BODC series reference number 958727
9587391991-07-18 05:26 61° 14' 39" N  19° 32' 3" W  View metadata report for BODC series reference number 958739
9587401991-07-18 07:12 61° 15' 37" N  19° 31' 55" W  View metadata report for BODC series reference number 958740
9587521991-07-18 11:13 61° 16' 50" N  19° 31' 25" W  View metadata report for BODC series reference number 958752
9587641991-07-18 16:58 61° 19' 29" N  19° 32' 34" W  View metadata report for BODC series reference number 958764
9587761991-07-18 23:14 61° 21' 36" N  19° 37' 39" W  View metadata report for BODC series reference number 958776
9587881991-07-19 05:57 61° 17' 4" N  19° 46' 27" W  View metadata report for BODC series reference number 958788
9588071991-07-19 11:05 61° 14' 57" N  19° 51' 33" W  View metadata report for BODC series reference number 958807
9588191991-07-19 17:02 61° 11' 21" N  19° 51' 8" W  View metadata report for BODC series reference number 958819
9588201991-07-19 22:47 61° 7' 58" N  19° 50' 7" W  View metadata report for BODC series reference number 958820
9588321991-07-20 03:24 61° 6' 17" N  19° 50' 44" W  View metadata report for BODC series reference number 958832
9588441991-07-20 04:58 61° 5' 15" N  19° 49' 16" W  View metadata report for BODC series reference number 958844
9588561991-07-20 11:12 61° 3' 10" N  19° 44' 54" W  View metadata report for BODC series reference number 958856
9588681991-07-20 17:55 61° 3' 15" N  19° 34' 51" W  View metadata report for BODC series reference number 958868
9588811991-07-20 23:32 61° 5' 30" N  19° 28' 28" W  View metadata report for BODC series reference number 958881
9588931991-07-21 03:46 61° 8' 53" N  19° 33' 2" W  View metadata report for BODC series reference number 958893
9589001991-07-21 05:03 61° 9' 33" N  19° 32' 10" W  View metadata report for BODC series reference number 958900
9589121991-07-21 14:04 61° 1' 7" N  19° 40' 40" W  View metadata report for BODC series reference number 958912
9589241991-07-21 17:33 61° 5' 36" N  19° 40' 28" W  View metadata report for BODC series reference number 958924
9589361991-07-21 20:50 61° 10' 38" N  19° 41' 29" W  View metadata report for BODC series reference number 958936
9589481991-07-22 00:13 61° 15' 52" N  19° 41' 54" W  View metadata report for BODC series reference number 958948
9589611991-07-22 04:28 61° 21' 11" N  19° 41' 54" W  View metadata report for BODC series reference number 958961
9589731991-07-22 09:05 61° 39' 59" N  20° 14' 33" W  View metadata report for BODC series reference number 958973
9589851991-07-22 13:35 61° 40' 5" N  19° 5' 30" W  View metadata report for BODC series reference number 958985
9589971991-07-22 17:28 61° 10' 54" N  19° 41' 37" W  View metadata report for BODC series reference number 958997
9590001991-07-23 00:23 60° 41' 35" N  20° 16' 27" W  View metadata report for BODC series reference number 959000
9590121991-07-23 05:19 60° 41' 44" N  19° 7' 1" W  View metadata report for BODC series reference number 959012
9590241991-07-23 09:13 61° 10' 47" N  19° 48' 0" W  View metadata report for BODC series reference number 959024
9590361991-07-23 12:50 61° 30' 6" N  19° 42' 33" W  View metadata report for BODC series reference number 959036
9590481991-07-23 20:28 62° 29' 52" N  19° 59' 42" W  View metadata report for BODC series reference number 959048
9590611991-07-23 21:22 62° 29' 34" N  19° 59' 30" W  View metadata report for BODC series reference number 959061
9590731991-07-24 02:46 62° 29' 34" N  20° 2' 15" W  View metadata report for BODC series reference number 959073
9590851991-07-24 11:32 62° 30' 7" N  20° 0' 3" W  View metadata report for BODC series reference number 959085
9590971991-07-24 12:59 62° 29' 56" N  20° 2' 13" W  View metadata report for BODC series reference number 959097
9591041991-07-24 17:55 62° 29' 14" N  19° 59' 26" W  View metadata report for BODC series reference number 959104
Discrete samples 
59  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
Silicate concentration parameters in the water column
Salinity of the water column
Microzooplankton non taxonomy-related biomass expressed as carbon per unit volume of the water column
Nitrate concentration parameters in the water column
Temperature of the water column
Phaeopigment concentrations in the water column
Concentration of alkenones and alkenoates in the water column
Dissolved oxygen parameters in the water column
Microzooplankton generic abundance in water bodies
43  Expendable BathythermographTemperature of the water column
209  Sample taken from ship's non-toxic supplyPrimary production in the water column
Chlorophyll pigment concentrations in water bodies
Phytoplankton taxonomic abundance in water bodies
Phaeopigment concentrations in the water column
Phytoplankton generic abundance in water bodies
Concentration of alkenones and alkenoates in the water column
Microzooplankton taxonomic abundance in water bodies
1  Stand-alone pumpsConcentration of alkenones and alkenoates in the water column
12  Water bottle hydrocastBacteria generic abundance in water bodies
Primary production in the water column
Chlorophyll pigment concentrations in water bodies
Bacterial production in the water column
Silicate concentration parameters in the water column
Microzooplankton grazing
Nitrate concentration parameters in the water column
Regenerated production in water bodies
New production in water bodies