Cruise inventory

RRS Discovery D338

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD338
Cruise period2009-04-15 — 2009-05-27
StatusCompleted
Port of departureSanta Cruz de Tenerife, Spain
Port of returnSanta Cruz de Tenerife, Spain
PurposeResearch
ObjectivesThis cruise is part of the UK science contribution to the international SOLAS project (Surface Ocean Lower Atmosphere Study www.uea.ac.uk/env/solas/) which aims to advance our understanding of environmentally important interactions between the ocean and the atmosphere. Data collected during the cruise will help to determine the influence of coastal/shelf regions (20-200 km offshore) on microbiological activity in the ocean and chemical interactions between the ocean and the atmosphere. Deep water containing high concentrations of nutrients such as nitrate, and gases such as nitrous oxide and methane, rises to the surface (upwells) at the Mauritanian shelf edge and moves offshore. These nutrients can be chemically altered by sunlight and used by bacteria and microscopic plants to grow. The gases escape to the atmosphere and contribute to global warming. This cruise will sample the upwelled water as it moves offshore measuring its temperature, salinity, nutrient and gas content and the impact this water has on microbiological growth and atmospheric composition in order to improve international global climate models.

The cruise has three scientific objectives:

1. To determine the role of upwelling on the supply, loss and air-sea exchange of climatically important gases produced by plankton
2. To determine the role of light in breaking down upwelled and recently produced dissolved organic matter and in producing climatically important trace gases
3. To determine the impact of nutrient enriched upwelled water on the spatial and temporal variability of plankton community structure and activity and resultant influence on biogenic gas flux
Chief scientistCarol Robinson (University of East Anglia School of Environmental Sciences)
ProjectSurface Ocean Lower Atmosphere Study (UK SOLAS)
Coordinating bodySchool of Environmental Sciences, University of East Anglia
Cruise reportRRS Discovery D338 cruise report d338.pdf — access key 'C' (7.73 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificEastern Atlantic
Track chartsRRS Discovery D338 cruise track — d338trk.pdf (0.02 MB) 
Measurements 
Physical oceanography 
Transparency (eg transmissometer)Quantity: number of deployments = 27
Description: In-water optics rig: i) Fast Repetition Rate Fluorometer (phytoplankton physiology); ii) Satlantic UV sensor (downwelling spectral UV light at 305, 320, 340 and 380 nm); iii) Wetlabs ac-9 (attenuation and absorption at 9 wavelengths: 412, 440, 488, 510, 532, 555, 650, 676, 715 nm - decomposed into a(c) total and CDOM by using casts with and without supracap filters); iv) SeaBird SBE19+ CTD (temperature and salinity with depth for correction of the ac9); v) ancillary PAR measurements (determination of light levels in water column)
Optics (eg underwater light levels)Quantity: number of deployments = 27
Description: In-water optics rig: i) Fast Repetition Rate Fluorometer (phytoplankton physiology); ii) Satlantic UV sensor (downwelling spectral UV light at 305, 320, 340 and 380 nm); iii) Wetlabs ac-9 (attenuation and absorption at 9 wavelengths: 412, 440, 488, 510, 532, 555, 650, 676, 715 nm - decomposed into a(c) total and CDOM by using casts with and without supracap filters); iv) SeaBird SBE19+ CTD (temperature and salinity with depth for correction of the ac9); v) ancillary PAR measurements (determination of light levels in water column)
Chemical oceanography 
OxygenQuantity: number of stations = 51
Description: Vertical profiles for dissolved oxygen concentration
OxygenQuantity: number of samples = 30
Description: Calibration samples for optode in non toxic seawater supply
OxygenQuantity: number of measurements = 50
Description: Continuous measurements of pCO2 and O2using non toxic supply
OxygenQuantity: number of experiments = 19
Description: Photo-oxidation experiments - carbon monoxide, dissolved oxygen and pH
Carbon dioxideQuantity: number of measurements = 50
Description: Continuous measurements of pCO2 and O2using non toxic supply
Other dissolved gasesQuantity: number of stations = 40
Description: OVOC analysis
Other dissolved gasesQuantity: number of stations = 35
Description: Vertical Profiles for N2O and CH4
Other dissolved gasesQuantity: activity duration in days = 15
Description: Underway SF6 (non toxic)
Other dissolved gasesQuantity: number of stations = 25
Description: 3He/4He measurements on vertical profiles
Other dissolved gasesQuantity: number of stations = 50
Description: SF6 measurements - vertical profiles
Other dissolved gasesQuantity: number of stations = 38
Description: Molecular analysis of methanogens
Other dissolved gasesQuantity: number of stations = 28
Description: Vertical profiles - carbon monoxide
Other dissolved gasesQuantity: number of profiles = 36
Description: Vertical Profiles for DMS and DMSP
Other dissolved gasesQuantity: number of experiments = 19
Description: Photo-oxidation experiments - carbon monoxide, dissolved oxygen and pH
PhosphateQuantity: number of stations = 68
Description: Vertical profiles for micronutrient analysis, analysed by colorimetric segmented flow auto-analysis
PhosphateQuantity: number of stations = 40
Description: Alkaline phosphatase analysis
NitrateQuantity: number of stations = 68
Description: Vertical profiles for micronutrient analysis, analysed by colorimetric segmented flow auto-analysis
NitriteQuantity: number of stations = 68
Description: Vertical profiles for micronutrient analysis, analysed by colorimetric segmented flow auto-analysis
AmmoniaQuantity: number of stations = 28
Description: Vertical profiles - ammonia
AmmoniaQuantity: number of stations = 68
Description: Vertical profiles for micronutrient analysis, analysed by colorimetric segmented flow auto-analysis
AmmoniaQuantity: number of experiments = 19
Description: Photo-oxidation experiments - ammonia
SilicateQuantity: number of stations = 68
Description: Vertical profiles for micronutrient analysis, analysed by colorimetric segmented flow auto-analysis
AlkalinityQuantity: number of stations = 29
Description: Vertical profiles for dissolved DIC/ALK concentration to be analysed in UEA by Carol Robinson
pHQuantity: number of experiments = 19
Description: Photo-oxidation experiments - carbon monoxide, dissolved oxygen and pH
IsotopesQuantity: number of stations = 11
Description: Sample collection for determination of 15N-N2O
Other chemical oceanographic measurementsQuantity: number of stations = 25
Description: N-assimilation kinetics, NH4+ regeneration, NH4+ oxidation, NO2- oxidation.
Other chemical oceanographic measurementsQuantity: number of stations = 10
Description: Surfactants
Biology and fisheries 
Primary productivityQuantity: number of stations = 20
Description: Vertical profiles for gross primary production, community respiration and net community production (O2)
Primary productivityQuantity: number of stations = 28
Description: Vertical profiles for on-board carbon fixation primary production
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 47
Description: Vertical profiles for phytoplankton pigment post-cruise analyses
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 50
Description: Calibration samples for underway chlorophyll from non toxic seawater supply
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of deployments = 27
Description: In-water optics rig: i) Fast Repetition Rate Fluorometer (phytoplankton physiology); ii) Satlantic UV sensor (downwelling spectral UV light at 305, 320, 340 and 380 nm); iii) Wetlabs ac-9 (attenuation and absorption at 9 wavelengths: 412, 440, 488, 510, 532, 555, 650, 676, 715 nm - decomposed into a(c) total and CDOM by using casts with and without supracap filters); iv) SeaBird SBE19+ CTD (temperature and salinity with depth for correction of the ac9); v) ancillary PAR measurements (determination of light levels in water column)
Dissolved organic matter (inc DOC)Quantity: number of stations = 28
Description: Vertical profiles - CDOM, fDOM
Dissolved organic matter (inc DOC)Quantity: number of experiments = 19
Description: Photo-oxidation experiments - CDOM, fDOM
Dissolved organic matter (inc DOC)Quantity: number of experiments = 19
Description: Photo-oxidation experiments - DOC/N, amino acids
Dissolved organic matter (inc DOC)Quantity: number of stations = 28
Description: Vertical profiles - DOC/N, amino acids
Biochemical measurements (eg lipids, amino acids)Quantity: number of stations = 47
Description: Ambient concentrations and turnover rates of urea and three amino acids - leucine, methionine, tyrosine - by total bacterioplankton were measured using isotopic dilution time-series incubations. Using the same seawater sample, additions of UV irradiated deep seawater were made and the response of the bacterioplankton community measured in terms of the change in rate of amino acid uptake.
PhytoplanktonQuantity: number of stations = 45
Description: Vertical profiles of phytoplankton, bacteria abundance from Niskin bottles on CTD casts, by flow cytometry
PhytoplanktonQuantity: number of stations = 40
Description: Phytoplankton community growth and grazing rates
PhytoplanktonQuantity: number of stations = 37
Description: Vertical profiles of phytoplankton abundance from Niskin bottles on CTD casts. Seawater samples preserved with Lugol's iodine for post-cruise microscopic analysis of community structure/composition
PhytoplanktonQuantity: number of stations = 16
Description: Vertical phytoplankton (10µm) net hauls (0-50m) for qualitative identification
ZooplanktonQuantity: number of stations = 10
Description: Vertical zooplankton (60µm and 700µm) net hauls (0-200m) for qualitative identification
ZooplanktonQuantity: number of stations = 37
Description: Vertical profiles of phytoplankton abundance from Niskin bottles on CTD casts. Seawater samples preserved with Lugol's iodine for post-cruise microscopic analysis of community structure/composition
Pelagic bacteria/micro-organismsQuantity: number of stations = 21
Description: Heterotrophic bacterial production, Particulate uptake of 14C labelled methanol, acetaldehyde and acetone, Total oxidation of 14C labelled methanol, acetone and acetaldehyde.
Pelagic bacteria/micro-organismsQuantity: number of stations = 12
Description: Incubations to determine CH4 oxidation rates
Pelagic bacteria/micro-organismsQuantity: number of stations = 45
Description: Vertical profiles of phytoplankton, bacteria abundance from Niskin bottles on CTD casts, by flow cytometry
Other biological/fisheries measurementQuantity: number of stations = 15
Description: Incubations for continuous measurements of O2 consumption using micro electrodes and in vivo respiratory electron transport system activity
Other biological/fisheries measurementQuantity: number of stations = 20
Description: Vertical profiles for gross primary production, community respiration and net community production (O2)
Meteorology 
Incident radiationQuantity: activity duration in days = 38
Description: Deck mounted (over the CTD winch cab) Trios UV sensor: i) Hyperspectral (2.5 nm resolution: 200-500 nm wavelength) UV at 5 minute intervals through daylight hours; ii) decomposed hyperspectral into broadband UV-A and UV-B
Other meteorological measurementsQuantity: activity duration in days = 15
Description: OVOC analysis
Other meteorological measurementsQuantity: activity duration in days = 36
Description: Microtops sunphotometer measurements: i) Aerosol optical thickness at 340, 440, 675 and 870 nm; ii) water vapour content (cm)
Moorings, landers, buoys 
Physical oceanography 
CTD stations19° 53' 3" N  18° 10' 47" W — Buoy recovery. Wire Walker.
CTD stations19° 52' 40" N  18° 8' 36" W — Buoy deployment. Wire Walker.
CTD stations19° 33' 56" N  18° 59' 21" W — Buoy deployment. Wire Walker.
CTD stations19° 35' 11" N  18° 20' 14" W — Buoy recovery. Wire Walker.
CTD stations21° 36' 54" N  18° 3' 51" W — Buoy recovery. Wire Walker.
CTD stations21° 31' 9" N  17° 59' 21" W — Buoy deployment. Wire Walker.
CTD stations19° 37' 14" N  18° 27' 6" W — Buoy deployment. Wire Walker.
CTD stations19° 24' 28" N  17° 49' 58" W — Buoy deployment. Wire Walker.
CTD stations19° 33' 14" N  18° 55' 30" W — Buoy recovery. Wire Walker.
CTD stations19° 44' 31" N  18° 37' 57" W — Buoy deployment. Wire Walker.
CTD stations19° 26' 20" N  19° 9' 23" W — Buoy recovery. Wire Walker.
CTD stations19° 37' 37" N  18° 37' 1" W — Buoy recovery. Wire Walker.
Subsurface temperature measurements21° 14' 33" N  17° 17' 23" W — Buoy deployment. Thermistor.
Subsurface temperature measurements20° 2' 7" N  18° 37' 13" W — Buoy recovery. Thermistor.
Subsurface temperature measurements20° 39' 25" N  18° 42' 2" W — Buoy recovery. Thermistor.
Subsurface temperature measurements21° 13' 15" N  17° 22' 51" W — Buoy deployment. Thermistor.
Subsurface temperature measurements20° 37' 5" N  18° 25' 39" W — Buoy recovery. Thermistor.
Subsurface temperature measurements20° 26' 57" N  18° 25' 39" W — Buoy deployment. Thermistor.
Current profiler (eg ADCP)19° 26' 24" N  19° 5' 54" W — Buoy recovery. ADCP.
Current profiler (eg ADCP)19° 38' 31" N  18° 27' 12" W — Buoy deployment. ADCP.
Current profiler (eg ADCP)19° 35' 46" N  19° 20' 43" W — Buoy recovery. ADCP.
Current profiler (eg ADCP)19° 24' 48" N  17° 55' 3" W — Buoy deployment. ADCP.
Current profiler (eg ADCP)21° 39' 29" N  18° 39' 29" W — Buoy recovery. ADCP.
Current profiler (eg ADCP)21° 36' 3" N  18° 0' 21" W — Buoy deployment. ADCP.
Current profiler (eg ADCP)21° 40' 55" N  17° 56' 20" W — Buoy recovery. ADCP.
Current profiler (eg ADCP)19° 43' 35" N  18° 42' 34" W — Buoy deployment. ADCP.
Current profiler (eg ADCP)21° 25' 15" N  17° 54' 43" W — Buoy deployment. ADCP.
Current profiler (eg ADCP)19° 39' 42" N  18° 42' 53" W — Buoy recovery. ADCP.
Data held at BODC 
Series/Profiles 
60  Bottle station
Quality control flags
Ammonium and ammonia concentration parameters in water bodies
Metadata parameters
Vertical spatial coordinates
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Reference numbers
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Quality control flags
Ammonium and ammonia concentration parameters in water bodies
Metadata parameters
Vertical spatial coordinates
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Reference numbers
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column

BODC idDate/TimeLocationDoc.
12484092009-05-16 09:23 19° 32' 32" N  18° 8' 27" W  View metadata report for BODC series reference number 1248409
12484102009-05-16 12:36 19° 32' 34" N  18° 9' 20" W  View metadata report for BODC series reference number 1248410
12484222009-05-17 05:16 19° 35' 31" N  18° 17' 45" W  View metadata report for BODC series reference number 1248422
12484342009-05-17 09:29 19° 36' 33" N  18° 18' 42" W  View metadata report for BODC series reference number 1248434
12484462009-05-17 12:31 19° 36' 46" N  18° 21' 25" W  View metadata report for BODC series reference number 1248446
12484582009-05-18 05:12 19° 40' 31" N  18° 27' 58" W  View metadata report for BODC series reference number 1248458
12484712009-05-18 10:23 19° 43' 7" N  18° 26' 8" W  View metadata report for BODC series reference number 1248471
12484832009-05-18 13:45 19° 43' 20" N  18° 26' 51" W  View metadata report for BODC series reference number 1248483
12484952009-05-19 05:10 19° 44' 24" N  18° 37' 40" W  View metadata report for BODC series reference number 1248495
12485022009-05-19 09:13 19° 44' 33" N  18° 38' 51" W  View metadata report for BODC series reference number 1248502
12485142009-05-19 12:34 19° 45' 1" N  18° 39' 22" W  View metadata report for BODC series reference number 1248514
12485262009-05-20 05:13 19° 41' 13" N  18° 46' 55" W  View metadata report for BODC series reference number 1248526
12479892009-04-18 06:10 22° 11' 17" N  19° 8' 37" W  View metadata report for BODC series reference number 1247989
12479902009-04-19 08:38 21° 28' 49" N  19° 6' 39" W  View metadata report for BODC series reference number 1247990
12480042009-04-20 03:16 21° 12' 4" N  18° 27' 31" W  View metadata report for BODC series reference number 1248004
12480162009-04-21 04:14 21° 29' 54" N  17° 14' 33" W  View metadata report for BODC series reference number 1248016
12480282009-04-22 04:16 21° 25' 51" N  17° 15' 54" W  View metadata report for BODC series reference number 1248028
12480412009-04-23 04:38 21° 11' 44" N  17° 22' 6" W  View metadata report for BODC series reference number 1248041
12480532009-04-23 09:17 21° 9' 15" N  17° 22' 44" W  View metadata report for BODC series reference number 1248053
12480652009-04-23 12:58 21° 7' 38" N  17° 23' 48" W  View metadata report for BODC series reference number 1248065
12480772009-04-24 04:38 21° 0' 21" N  17° 28' 22" W  View metadata report for BODC series reference number 1248077
12480892009-04-24 09:19 20° 57' 50" N  17° 28' 47" W  View metadata report for BODC series reference number 1248089
12480902009-04-24 13:08 20° 56' 16" N  17° 29' 47" W  View metadata report for BODC series reference number 1248090
12481082009-04-25 04:59 20° 51' 48" N  17° 38' 7" W  View metadata report for BODC series reference number 1248108
12481212009-04-25 11:36 20° 49' 22" N  17° 40' 57" W  View metadata report for BODC series reference number 1248121
12481332009-04-25 13:37 20° 49' 12" N  17° 41' 50" W  View metadata report for BODC series reference number 1248133
12481452009-04-26 05:05 20° 41' 20" N  17° 47' 54" W  View metadata report for BODC series reference number 1248145
12481572009-04-26 09:21 20° 40' 2" N  17° 48' 57" W  View metadata report for BODC series reference number 1248157
12485382009-05-20 08:47 19° 40' 58" N  18° 48' 45" W  View metadata report for BODC series reference number 1248538
12485512009-05-20 12:49 19° 40' 26" N  18° 50' 23" W  View metadata report for BODC series reference number 1248551
12485632009-05-20 16:49 19° 41' 1" N  18° 52' 12" W  View metadata report for BODC series reference number 1248563
12485752009-05-20 20:48 19° 41' 12" N  18° 53' 0" W  View metadata report for BODC series reference number 1248575
12485872009-05-21 05:16 19° 38' 5" N  18° 54' 24" W  View metadata report for BODC series reference number 1248587
12485992009-05-21 09:40 19° 35' 1" N  18° 56' 8" W  View metadata report for BODC series reference number 1248599
12486062009-05-21 13:13 19° 34' 40" N  18° 58' 24" W  View metadata report for BODC series reference number 1248606
12486182009-05-22 05:23 19° 30' 58" N  19° 6' 51" W  View metadata report for BODC series reference number 1248618
12486312009-05-22 08:05 19° 29' 32" N  19° 8' 34" W  View metadata report for BODC series reference number 1248631
12481692009-04-26 13:05 20° 40' 51" N  17° 50' 38" W  View metadata report for BODC series reference number 1248169
12481702009-04-27 04:52 20° 39' 44" N  17° 54' 36" W  View metadata report for BODC series reference number 1248170
12481822009-04-27 09:19 20° 37' 24" N  17° 56' 20" W  View metadata report for BODC series reference number 1248182
12481942009-04-27 13:06 20° 37' 17" N  17° 57' 43" W  View metadata report for BODC series reference number 1248194
12482012009-04-28 10:22 20° 43' 19" N  18° 15' 26" W  View metadata report for BODC series reference number 1248201
12482132009-04-28 13:17 20° 42' 50" N  18° 18' 20" W  View metadata report for BODC series reference number 1248213
12482252009-04-29 04:44 20° 38' 42" N  18° 28' 7" W  View metadata report for BODC series reference number 1248225
12482622009-05-08 05:20 21° 25' 29" N  17° 56' 8" W  View metadata report for BODC series reference number 1248262
12482372009-04-29 09:17 20° 37' 42" N  18° 31' 5" W  View metadata report for BODC series reference number 1248237
12482492009-04-29 13:25 20° 38' 3" N  18° 33' 27" W  View metadata report for BODC series reference number 1248249
12482502009-04-30 03:47 20° 38' 7" N  18° 40' 24" W  View metadata report for BODC series reference number 1248250
12482742009-05-09 05:18 21° 31' 0" N  17° 59' 36" W  View metadata report for BODC series reference number 1248274
12482862009-05-09 09:20 21° 30' 40" N  18° 0' 8" W  View metadata report for BODC series reference number 1248286
12482982009-05-09 13:00 21° 34' 18" N  18° 2' 45" W  View metadata report for BODC series reference number 1248298
12483052009-05-10 05:21 21° 37' 25" N  18° 2' 5" W  View metadata report for BODC series reference number 1248305
12483172009-05-10 09:19 21° 36' 20" N  18° 0' 43" W  View metadata report for BODC series reference number 1248317
12483292009-05-10 12:35 21° 36' 30" N  18° 1' 58" W  View metadata report for BODC series reference number 1248329
12483302009-05-12 18:48 19° 12' 51" N  19° 43' 34" W  View metadata report for BODC series reference number 1248330
12483422009-05-13 15:34 19° 40' 28" N  18° 26' 58" W  View metadata report for BODC series reference number 1248342
12483542009-05-14 05:51 19° 52' 12" N  18° 10' 1" W  View metadata report for BODC series reference number 1248354
12483662009-05-15 09:23 19° 25' 42" N  17° 55' 52" W  View metadata report for BODC series reference number 1248366
12483782009-05-15 12:59 19° 26' 24" N  17° 57' 41" W  View metadata report for BODC series reference number 1248378
12483912009-05-16 05:11 19° 30' 52" N  18° 6' 21" W  View metadata report for BODC series reference number 1248391
1  Pumped water sample
Ammonium and ammonia concentration parameters in water bodies
Silicate concentration parameters in the water column
Horizontal spatial co-ordinates
Nitrate concentration parameters in 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
Silicate concentration parameters in the water column
Horizontal spatial co-ordinates
Nitrate concentration parameters in the water column
Date and time
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column

BODC idDate/TimeLocationDoc.
13604222009-04-17 13:37  — 2009-05-13 19:32 18° 47' 22" N  19° 48' 44" W — 22° 8' 29" N  17° 8' 12" W  View metadata report for BODC series reference number 1360422
Discrete samples 
834  All plastic clean surface pumped supplyAmmonium and ammonia concentration parameters in water bodies
Bacteria taxonomic abundance in water bodies
Bacteria generic abundance in water bodies
Organosulphur and organoselenium species concentration parameters in water bodies
Phytoplankton taxonomic abundance in water bodies
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Phytoplankton generic abundance in water bodies
102  CTD frame plus rosette samplerAmmonium and ammonia concentration parameters in water bodies
Bacteria taxonomic abundance in water bodies
Raw suspended particulate material concentration sensor output
Transmittance and attenuance of the water column
Bacteria generic abundance in water bodies
Organosulphur and organoselenium species concentration parameters in water bodies
Density of the water column
Visible waveband radiance and irradiance measurements in the water column
Carbon monoxide and dioxide concentrations in the atmosphere
Chlorophyll pigment concentrations in water bodies
Phytoplankton taxonomic abundance in water bodies
Silicate concentration parameters in the water column
Raw oxygen sensor output
Salinity of the water column
Nitrate concentration parameters in the water column
Surfactant concentrations in water bodies
Temperature of the water column
Dissolved oxygen parameters in the water column
Microzooplankton generic abundance in water bodies
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Phytoplankton generic abundance in water bodies
Dissolved concentration parameters for other gases in the water column
78  Sample taken from ship's non-toxic supplyChlorophyll pigment concentrations in water bodies
Salinity of the water column
11  Surfactant concentrations in water bodies