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BODC Cruise Metadata Report for RRS Charles Darwin (74AB) cruise CD156

Introduction

This report collates information from the BODC cruise inventory and oceanographic databases. It presents

Cruise Inventory Information

Long name RRS Charles Darwin (74AB) cruise CD156
Short name CD156
Objectives and Narrative Between the 26th April and 26th May 2004 Plymouth Marine Laboratory in collaboration with scientists from NIWA, New Zealand, Laboratoire Arago, France and University of East Anglia conducted a two-ship exercise using RRS Charles Darwin and RV Poseidon (see Poseidon cruise PO311) to test the following hypothesis:

'The supply of, and the interaction between, iron and phosphorous control biological activity and fluxes in the subtropical North Atlantic.'

An experimental area in international waters to the west of the Canary Islands was selected following an intense period of vertical and horizontal mapping by the Charles Darwin. Using SF6 as a tracer for amended waters, two separate experiments were performed.

The first (5th - 15th May) involved the addition of 20 tonnes of anhydrous monosodium phosphate at 10 m depth over an area of approximately 25 km2, centred at 27.8N 23.3W.

The second experiment was conducted following a mid-cruise return by the Poseidon to Tenerife between 16th and 22nd May, at 27.5N 22.5W when 5 tonnes of acidified iron sulphate were added over the first 12 hours and, following a 15 hour recovery period, 20 tonnes of phosphate were added on the top of the original iron/SF6 patch. Measurements of nutrient cycling, biogenic gases, and biological activity were monitored prior to and after deployment (IN stations) of the fertilised patches relative to several (OUT) control stations.
Ship RRS Charles Darwin
Departure Port Santa Cruz de Tenerife, Spain
Departure Date 2004-04-26
Arrival Port Santa Cruz de Tenerife, Spain
Arrival Date 2004-05-23
Principal Scientist(s) Nicholas J P Owens (Newcastle University School of Marine Science and Technology)
Responsible Organisation Plymouth Marine Laboratory
Associated Project(s) FEEP
IHB Sea Areas Visited North East Atlantic Ocean (limit 40W)
Marsden Squares Visited 75
Work Area Description Tropical North Atlantic Ocean
Work Area Bounding Polygon 20N,30W; 30N,30W; 30N,20W; 20N,20W; 20N,30W
Southern Limit 20N
Northern Limit 30N
Western Limit 30W
Eastern Limit 20W

Cruise Inventory Datasets

Physical oceanography  
CTD stations Quantity: number of profiles = 93
Description: CTD Casts - standard UORS instrumentation - temperature, salinity, transmission, fluorescence  
Current profiler (eg ADCP) Quantity: number of profiles = 92
Description: Lowered ACDP RDI 300 kHz, downward looking  
Current profiler (eg ADCP) Quantity: number of profiles = 52
Description: Vertical profiles of sulphur hexafluoride taken from Niskins mounted on CTD rosette  
Current profiler (eg ADCP) Quantity: activity duration in days = 28
Description: Vessel Mounted ADCP (150 Hz RDI Narrow Band), all processed  
Geochemical tracers (eg freons) Quantity: activity duration in days = 14
Description: Night-time underway surface intake measurements of sulphur hexafluoride  
Optics (eg underwater light levels) Quantity: number of profiles = 45
Description: Optical freefal instrument with 7 band radiance and 7 band irradiance head + depth, tilt and roll  
Subsurface temperature and salinity measurements Quantity: activity duration in hours = 100
Description: Tows of Undulating Oceanographic Recorder (UOR) in and around tracer patches 1 and 2.  
Surface measurements underway (T,S) Quantity: activity duration in days = 29
Description: Underway surface intake measurements of T & S  
Transparency (eg transmissometer) Quantity: number of profiles = 12
Description: Filters collected for measurement of particle absorption from midday CTDs and selected outstations  
Transparency (eg transmissometer) Quantity: number of profiles = 93
Description: CTD Casts - standard UORS instrumentation - temperature, salinity, transmission, fluorescence  
Chemical oceanography  
Ammonia Quantity: number of profiles = 37
Description: Vertical profiles of nano-molar ammonium from Niskins mounted on CTD rosette  
Nitrate Quantity: number of profiles = 40
Description: Vertical profiles of nanomolar nitrate, nitrite and phosphate taken from CTD rosette  
Nitrate Quantity: number of profiles = 34
Description: Vertical profiles of nitrate, nitrite, phosphate and silicate taken from Niskins mounted on CTD rosette  
Nitrate Quantity: number of experiments = 5
Description: Dissolved organic matter biodegradation experiments  
Nitrite Quantity: number of profiles = 40
Description: Vertical profiles of nanomolar nitrate, nitrite and phosphate taken from CTD rosette  
Nitrite Quantity: number of profiles = 34
Description: Vertical profiles of nitrate, nitrite, phosphate and silicate taken from Niskins mounted on CTD rosette  
Other chemical oceanographic measurements Quantity: number of profiles = 45
Description: Measurements of DMS and DMSP (particulate and dissolved) taken from CTD rosette  
Other chemical oceanographic measurements Quantity: number of experiments = 5
Description: Dissolved organic matter biodegradation experiments  
Other chemical oceanographic measurements Quantity: number of experiments = 11
Description: Dilution Grazing Experiments. Measurements of autotrophic cyanobacteria (AFC) , measurements of DMSP production and consumption rates, viral lysis, FFRF, microscopy and chl a  
Other dissolved gases Quantity: number of experiments = 11
Description: Dilution Grazing Experiments. Measurements of autotrophic cyanobacteria (AFC) , measurements of DMSP production and consumption rates, viral lysis, FFRF, microscopy and chl a  
Other dissolved gases Quantity: number of profiles = 38
Description: Measurement of methyl bromide  
Other dissolved gases Quantity: number of profiles = 52
Description: Measurements of dissolved volatile organic iodine compounds  
Other dissolved gases Quantity: number of profiles = 45
Description: Measurements of DMS and DMSP (particulate and dissolved) taken from CTD rosette  
Phosphate Quantity: activity duration in days = 12
Description: Night-time underway surface intake measurements of nanomolar phosphate  
Phosphate Quantity: number of experiments = 5
Description: Dissolved organic matter biodegradation experiments  
Phosphate Quantity: number of profiles = 40
Description: Vertical profiles of nanomolar nitrate, nitrite and phosphate taken from CTD rosette  
Phosphate Quantity: number of profiles = 34
Description: Vertical profiles of nitrate, nitrite, phosphate and silicate taken from Niskins mounted on CTD rosette  
Silicate Quantity: number of profiles = 34
Description: Vertical profiles of nitrate, nitrite, phosphate and silicate taken from Niskins mounted on CTD rosette  
Trace elements Quantity: number of profiles = 33
Description: Dissolved iron measurements taken from Niskins mounted on CTD rosette  
Trace elements Quantity: activity duration in days = 10
Description: Night-time underway iron measurements taken from trace metal fish  
Biology and fisheries  
Dissolved organic matter (inc DOC) Quantity: number of profiles = 23
Description: Vertical profiles of dissolved organic carbon taken from CTD rosette  
Dissolved organic matter (inc DOC) Quantity: number of profiles = 24
Description: Vertical profiles of dissolved organic phosphorus and dissolved organic nitrogen taken from CTD rosette  
Particulate organic matter (inc POC, PON) Quantity: number of profiles = 23
Description: Vertical profiles of particulate nitrogen and particulate phosphorus taken from CTD rosette  
Pelagic bacteria/micro-organisms Quantity: number of experiments = 11
Description: Dilution Grazing Experiments. Measurements of autotrophic cyanobacteria (AFC) , measurements of DMSP production and consumption rates, viral lysis, FFRF, microscopy and chl a  
Pelagic bacteria/micro-organisms Quantity: number of profiles = 27
Description: Measurement of virus composition, abundance and productivity from samples collected from CTD rosette  
Pelagic bacteria/micro-organisms Quantity: number of profiles = 47
Description: Samples collected for post-cruise determination of heterotrophic bacteria and viruses from water taken from CTD rosette  
Pelagic bacteria/micro-organisms Quantity: number of profiles = 47
Description: Collection of preserved seawater samples taken from CTD rosette for analysis of micro- and nanoplankton via microscopy  
Pelagic bacteria/micro-organisms Quantity: number of profiles = 47
Description: Samples taken from CTD rosette for analysis of nano and picoplankton via flow cytometry (AFC)  
Phytoplankton Quantity: number of profiles = 47
Description: Samples taken from CTD rosette for analysis of nano and picoplankton via flow cytometry (AFC)  
Phytoplankton Quantity: number of profiles = 47
Description: Collection of preserved seawater samples taken from CTD rosette for analysis of micro- and nanoplankton via microscopy  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: number of profiles = 93
Description: CTD Casts - standard UORS instrumentation - temperature, salinity, transmission, fluorescence  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: number of experiments = 11
Description: Dilution Grazing Experiments. Measurements of autotrophic cyanobacteria (AFC) , measurements of DMSP production and consumption rates, viral lysis, FFRF, microscopy and chl a  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: number of profiles = 57
Description: Vertical profiles of phytoplankton pigments (via HPLC) taken from CTD rosette  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: number of profiles = 87
Description: Vertical FRRF profiles, instrument mounted on CTD rosette  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: number of samples = 36
Description: Underway surface intake measurements of HPLC pigments  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: activity duration in days = 12
Description: Night-time underway surface intake FRRF measurements  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: activity duration in days = 29
Description: Underway surface intake fluorescence (samples routinely collected for chlorophyll calibration via HPLC)  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: number of profiles = 12
Description: Filters collected for HPLC pigment analysis (linked to particle absorption)  
Meteorology  
Routine standard measurements Quantity: activity duration in days = 29
Description: Routine meteorological measurements made by Darwin Met Package  

Cruise Inventory Mooring/Buoy Operations

Latitude Longitude Data type Description
27° 32' N 22° 34' W Phytoplankton pigs (eg chlorophyll, fluorescence) Deployment of FRRF (depth 26m) attached to surface drifter drogued at 20m Deployed 16 May 07:30 - 18 May 18:30 Redeployed 18 May 19:50 - 22 May 13:4
27° 33' N 22° 32' W Subsurface temperature measurements Deployment of Thermistor chain 10 * Vemco, 4 * RBR, 4 * RBRD (depths 5 - 170 m ) attached to surface difter drogued at 20 m Deployed 16 May 08:00 - 18 May 19:10 Redeployed 18 May 20:00 - 22 May 13:15 (Patch 2 Fe + PO4)
27° 48' N 23° 19' W Subsurface temperature measurements Deployment of Thermistor chain 10 * Vemco, 4 * RBR, 4 * RBRD (depths 5 - 170 m ) attached to surface difter drogued at 20 m Deployed 4 May 15:27 - 10 May 20:00 Redeployed 10 May 23:37 - 13 May 13:00 (Patch 1 PO4 only
27° 32' N 22° 34' W Surface drifters/drifting buoys Deployment of FRRF (depth 26m) attached to surface drifter drogued at 20m Deployed 16 May 07:30 - 18 May 18:30 Redeployed 18 May 19:50 - 22 May 13:4
27° 33' N 22° 32' W Surface drifters/drifting buoys Deployment of Thermistor chain 10 * Vemco, 4 * RBR, 4 * RBRD (depths 5 - 170 m ) attached to surface difter drogued at 20 m Deployed 16 May 08:00 - 18 May 19:10 Redeployed 18 May 20:00 - 22 May 13:15 (Patch 2 Fe + PO4)
27° 48' N 23° 19' W Surface drifters/drifting buoys Deployment of Thermistor chain 10 * Vemco, 4 * RBR, 4 * RBRD (depths 5 - 170 m ) attached to surface difter drogued at 20 m Deployed 4 May 15:27 - 10 May 20:00 Redeployed 10 May 23:37 - 13 May 13:00 (Patch 1 PO4 only
27° 39' N 23° 19' W Surface drifters/drifting buoys Deployment of second surface drifter for 1 day (Patch 1)

Summary of BODC Data Holdings for the Cruise

National Oceanographic Database

Summary

# Series Instrument Description Parameters
1 Bottle station Metadata parameters
Nitrate concentration parameters in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Quality control flags
Reference numbers
Silicate concentration parameters in the water column
Vertical spatial coordinates
27 Bottle station Ammonium and ammonia concentration parameters in water bodies
Metadata parameters
Nitrate concentration parameters in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Quality control flags
Reference numbers
Silicate concentration parameters in the water column
Vertical spatial coordinates
9 Bottle station Ammonium and ammonia concentration parameters in water bodies
Metadata parameters
Nitrate concentration parameters in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Quality control flags
Reference numbers
Vertical spatial coordinates
1 Bottle station Ammonium and ammonia concentration parameters in water bodies
Metadata parameters
Nitrate concentration parameters in the water column
Quality control flags
Reference numbers
Vertical spatial coordinates
4 Bottle station Metadata parameters
Nitrate concentration parameters in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Quality control flags
Reference numbers
Vertical spatial coordinates

Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)

Full List

BODC Reference Instrument Description Date/Time Location  
1353068 Bottle station 2004-04-28 14:27Z 27° 58' N, 23° 26' W Click for more
1353081 Bottle station 2004-04-29 04:17Z 26° 45' N, 23° 28' W Click for more
1353093 Bottle station 2004-04-29 10:28Z 26° 42' N, 22° 43' W Click for more
1353100 Bottle station 2004-04-29 18:53Z 26° 8' N, 23° 24' W Click for more
1353112 Bottle station 2004-04-30 08:46Z 24° 49' N, 24° 49' W Click for more
1353124 Bottle station 2004-05-01 10:08Z 27° 48' N, 25° 1' W Click for more
1353136 Bottle station 2004-05-01 18:11Z 28° 25' N, 24° 22' W Click for more
1353148 Bottle station 2004-05-03 10:33Z 27° 48' N, 23° 19' W Click for more
1353161 Bottle station 2004-05-04 08:56Z 27° 48' N, 23° 19' W Click for more
1353173 Bottle station 2004-05-05 19:33Z 27° 47' N, 23° 18' W Click for more
1353185 Bottle station 2004-05-06 07:33Z 27° 45' N, 23° 16' W Click for more
1353197 Bottle station 2004-05-07 08:05Z 27° 43' N, 23° 13' W Click for more
1353204 Bottle station 2004-05-07 13:45Z 27° 43' N, 23° 13' W Click for more
1353216 Bottle station 2004-05-07 16:10Z 27° 44' N, 23° 21' W Click for more
1353228 Bottle station 2004-05-08 11:10Z 27° 40' N, 23° 14' W Click for more
1353241 Bottle station 2004-05-08 16:07Z 27° 41' N, 23° 3' W Click for more
1353253 Bottle station 2004-05-09 07:49Z 27° 41' N, 23° 13' W Click for more
1353265 Bottle station 2004-05-09 15:36Z 27° 47' N, 23° 13' W Click for more
1353277 Bottle station 2004-05-10 07:57Z 27° 39' N, 23° 13' W Click for more
1353289 Bottle station 2004-05-11 06:23Z 27° 40' N, 23° 21' W Click for more
1353290 Bottle station 2004-05-11 08:12Z 27° 42' N, 23° 18' W Click for more
1353308 Bottle station 2004-05-11 10:24Z 27° 41' N, 23° 19' W Click for more
1353321 Bottle station 2004-05-11 12:24Z 27° 40' N, 23° 20' W Click for more
1353333 Bottle station 2004-05-11 14:21Z 27° 39' N, 23° 21' W Click for more
1353345 Bottle station 2004-05-11 18:58Z 27° 39' N, 23° 22' W Click for more
1353357 Bottle station 2004-05-12 07:19Z 27° 39' N, 23° 22' W Click for more
1353369 Bottle station 2004-05-13 16:48Z 27° 45' N, 23° 24' W Click for more
1353370 Bottle station 2004-05-14 07:37Z 27° 37' N, 23° 16' W Click for more
1353382 Bottle station 2004-05-14 15:09Z 27° 41' N, 23° 11' W Click for more
1353394 Bottle station 2004-05-15 07:32Z 27° 37' N, 23° 14' W Click for more
1353401 Bottle station 2004-05-16 04:50Z 27° 32' N, 22° 34' W Click for more
1353413 Bottle station 2004-05-17 07:20Z 27° 33' N, 22° 29' W Click for more
1353425 Bottle station 2004-05-17 13:50Z 27° 34' N, 22° 27' W Click for more
1353437 Bottle station 2004-05-19 07:22Z 27° 39' N, 22° 18' W Click for more
1353449 Bottle station 2004-05-19 12:01Z 27° 40' N, 22° 16' W Click for more
1353450 Bottle station 2004-05-19 14:58Z 27° 40' N, 22° 23' W Click for more
1353462 Bottle station 2004-05-19 18:30Z 27° 40' N, 22° 22' W Click for more
1353474 Bottle station 2004-05-20 08:26Z 27° 38' N, 22° 15' W Click for more
1353486 Bottle station 2004-05-21 07:22Z 27° 40' N, 22° 12' W Click for more
1353498 Bottle station 2004-05-21 11:55Z 27° 40' N, 22° 12' W Click for more
1353505 Bottle station 2004-05-22 07:29Z 27° 42' N, 22° 3' W Click for more
1353517 Bottle station 2004-05-22 11:54Z 27° 47' N, 22° 3' W Click for more

Project Database

# Events Gear Type Parameters Held
1275 Sample taken from ship's non-toxic supply Phosphate concentration parameters in the water column
Chlorophyll pigment concentrations in water bodies
80 All plastic clean surface pumped supply Dissolved metal concentrations in the water column
93 CTD frame plus rosette sampler Transmittance and attenuance of the water column
Carotenoid and flavenoid pigment concentrations in water bodies
Nitrite concentration parameters in the water column
Phytoplankton taxonomic abundance in water bodies
Phosphate concentration parameters in the water column
Dissolved oxygen parameters in the water column
Temperature of the water column
Salinity of the water column
Total metal concentrations in water bodies
Concentration of suspended particulate material in the water column
Bacteria generic abundance in water bodies
Silicate concentration parameters in the water column
Visible waveband radiance and irradiance measurements in the water column
Virus abundance in water bodies
Phytoplankton generic abundance in water bodies
Ammonium and ammonia concentration parameters in water bodies
Density of the water column
Nitrate concentration parameters in the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies
Dissolved metal concentrations in the water column

Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)

References

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