Resources

RRS Discovery D321 (D321A)

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74E3)
Cruise identifierD321 (D321A)
Cruise period2007-07-24 — 2007-08-23
StatusCompleted
Port of departureGovan, United Kingdom
Port of returnReykjavík, Iceland
PurposeResearch
ObjectivesD321 was the first of three National Oceanography Centre 'process study' research cruises to be run by the Ocean Biogeochemistry and Ecosystems research group under the NERC Oceans 2025 research programme. The scientific work began by carrying out some of the extended Ellett Line stations on the way out to our study region; which centred around the historical JGOFS Ocean Weather Station India site (~59 N, ~19 W) and the northward turn of the Extended Ellett Line at 20 W. The Iceland Basin, like much of the N. Atlantic subpolar gyre, is characterised by a 'bloom and bust' seasonal cycle. Spring stratification triggers a major diatom dominated bloom event. This bloom is short lived, limited by silicate (orthosilicic acid) exhaustion (Brown et al., 2003). Two community succession pathways commonly follow the demise of the diatom bloom; typically through dinoflagellate and/or coccolithophore production. The spring bloom is dominated by eddy scale (several 10's of km) patchiness, driven by the upward and downward pumping effect of eddies on the newly forming spring stratification. However these eddy structures have another, more important, impact on phytoplankton production (Allen et al., 2005). In the release of potential energy, eddies effect a real three dimensional exchange of water across the thermocline bringing new dissolved nutrients from deeper waters up into the photic zone and transporting biogenic particles into the deep ocean. Thin ribbon like structures around the edges of eddies are clearly seen in ocean colour satellite images. The four repeated surveys carried out during D321 observed the evolution of an 'eddy dipole' in a background ocean full of eddies and other turbulent motions. Daily, near real-time, satellite images and in-situ vessel mounted acoustic current profiling were used to determine the movement of the eddy centres and the dipole central jet. Targeted nets and water collection within the various components of the eddy dipole enabled the assessment of its biological impacts.
The SUV-6 Dissolved Nitrate Sensor addendum report is also available below (authors R E M Pidcock and M Srokosz). The SUV6 Sensor was flown on SeaSoar and the outputs of the deployments available in this report.
Chief scientistJohn T Allen (National Oceanography Centre, Southampton)
ProjectOceans 2025
Coordinating bodyNERC
Cruise reportRRS Discovery D321 (D321A) cruise report d321.pdf (3.62 MB) 
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
North East Atlantic Ocean (limit 40W)
SpecificRockall Trough, Hatton Bank, Iceland Basin, Ellett Line
Track chartsRRS Discovery D321 (D321A) cruise track — d321trk.pdf (0.16 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 29
Description: Meteorological and surface intake water measurements from Surfmet system
Water bottle stationsQuantity: number of samples = 93
Description: Vertical CTD profiles (5-2800m) Instruments/procedures: Seabird 911+ titanium unit & stainless steel unit with Seabird SBE 43 oxygen sensor
CTD stationsQuantity: number of samples = 93
Description: Vertical CTD profiles (5-2800m) Instruments/procedures: Seabird 911+ titanium unit & stainless steel unit with Seabird SBE 43 oxygen sensor
Subsurface temperature and salinity measurementsQuantity: track kilometres = 1369
Description: Continuous undulating tow measurements from SeaSoar (350-450m maximum depth)
Transparency (eg transmissometer)Quantity: number of samples = 93
Description: Vertical CTD profiles (5-2800m) Instruments/procedures: Seabird 911+ titanium unit & stainless steel unit with Seabird SBE 43 oxygen sensor
Transparency (eg transmissometer)Quantity: activity duration in days = 29
Description: Meteorological and surface intake water measurements from Surfmet system
Optics (eg underwater light levels)Quantity: number of samples = 93
Description: Vertical CTD profiles (5-2800m) Instruments/procedures: Seabird 911+ titanium unit & stainless steel unit with Seabird SBE 43 oxygen sensor
Optics (eg underwater light levels)Quantity: track kilometres = 1369
Description: Continuous undulating tow measurements from SeaSoar (350-450m maximum depth)
Current profiler (eg ADCP)Quantity: number of samples = 93
Description: Vertical CTD profiles (5-2800m) Instruments/procedures: Seabird 911+ titanium unit & stainless steel unit with Seabird SBE 43 oxygen sensor
Current profiler (eg ADCP)Quantity: activity duration in days = 31
Description: Continuous subsurface measurements Instruments: RDI 150 kHz vessel mounted ADCP & RDI 75 kHz Ocean Surveyor vessel mounted ADCP
Other physical oceanographic measurementsQuantity: number of stations = 20
Description: Continuous vertical profiles (~0-140db): Microstructure profiler MSS90L. Parameters: turbulent diffusivities
Chemical oceanography 
OxygenQuantity: number of samples = 93
Description: Vertical CTD profiles (5-2800m) Instruments/procedures: Seabird 911+ titanium unit & stainless steel unit with Seabird SBE 43 oxygen sensor
OxygenQuantity: number of profiles = 76
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles Instruments/procedures: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), CHN analyser, Chelsea Fastracka I & II using FRR technique, SATLANTIC using FIRe technique, Turner fluorometer following Welschmeyer protocol & HPLC, Winkler titration Parameters: Active chlorophyll fluorescence, chlorophyll a and algal pigments, total thorium-234, particulate organic carbon, particulate organic nitrogen, dissolved organic carbon
OxygenQuantity: track kilometres = 1369
Description: Continuous undulating tow measurements from SeaSoar (350-450m maximum depth)
Other dissolved gasesQuantity: number of profiles = 76
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles Instruments/procedures: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), CHN analyser, Chelsea Fastracka I & II using FRR technique, SATLANTIC using FIRe technique, Turner fluorometer following Welschmeyer protocol & HPLC, Winkler titration Parameters: Active chlorophyll fluorescence, chlorophyll a and algal pigments, total thorium-234, particulate organic carbon, particulate organic nitrogen, dissolved organic carbon
Other dissolved gasesQuantity: number of samples = 260
Description: Surface intake water measurements from Surfmet system (~5m): Scalar Sanplus Autoanalyser Instruments/procedures: CHN analyser, Turner fluorometer following Welschmeyer protocol & HPLC, 14C & 32Si-labelled incubations and liquid scintillation counter. Silicification to be analysed at NOCS, ICP-AOES and further analysis at NOCS, SEM and light microscopy Parameters: Particulate organic carbon, chlorophyll a, algal pigments, primary productivity, calcification and silicification, particulate inorganic carbon, biogenic silica, RNA, DNA, single cell PCR, metaproteomics, Identification and abundance
PhosphateQuantity: number of samples = 1502
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. Scalar Sanplus Autoanalyser
PhosphateQuantity: number of samples = 260
Description: Surface intake water measurements from Surfmet system (~5m): Scalar Sanplus Autoanalyser Instruments/procedures: CHN analyser, Turner fluorometer following Welschmeyer protocol & HPLC, 14C & 32Si-labelled incubations and liquid scintillation counter. Silicification to be analysed at NOCS, ICP-AOES and further analysis at NOCS, SEM and light microscopy Parameters: Particulate organic carbon, chlorophyll a, algal pigments, primary productivity, calcification and silicification, particulate inorganic carbon, biogenic silica, RNA, DNA, single cell PCR, metaproteomics, Identification and abundance
NitrateQuantity: number of samples = 260
Description: Surface intake water measurements from Surfmet system (~5m): Scalar Sanplus Autoanalyser Instruments/procedures: CHN analyser, Turner fluorometer following Welschmeyer protocol & HPLC, 14C & 32Si-labelled incubations and liquid scintillation counter. Silicification to be analysed at NOCS, ICP-AOES and further analysis at NOCS, SEM and light microscopy Parameters: Particulate organic carbon, chlorophyll a, algal pigments, primary productivity, calcification and silicification, particulate inorganic carbon, biogenic silica, RNA, DNA, single cell PCR, metaproteomics, Identification and abundance
NitrateQuantity: track kilometres = 1369
Description: Continuous undulating tow measurements from SeaSoar (350-450m maximum depth)
NitrateQuantity: number of samples = 93
Description: Vertical CTD profiles (5-2800m) Instruments/procedures: Seabird 911+ titanium unit & stainless steel unit with Seabird SBE 43 oxygen sensor
NitrateQuantity: number of samples = 1502
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. Scalar Sanplus Autoanalyser
NitriteQuantity: number of samples = 260
Description: Surface intake water measurements from Surfmet system (~5m): Scalar Sanplus Autoanalyser Instruments/procedures: CHN analyser, Turner fluorometer following Welschmeyer protocol & HPLC, 14C & 32Si-labelled incubations and liquid scintillation counter. Silicification to be analysed at NOCS, ICP-AOES and further analysis at NOCS, SEM and light microscopy Parameters: Particulate organic carbon, chlorophyll a, algal pigments, primary productivity, calcification and silicification, particulate inorganic carbon, biogenic silica, RNA, DNA, single cell PCR, metaproteomics, Identification and abundance
NitriteQuantity: number of samples = 1502
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. Scalar Sanplus Autoanalyser
Total - NQuantity: number of profiles = 76
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles Instruments/procedures: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), CHN analyser, Chelsea Fastracka I & II using FRR technique, SATLANTIC using FIRe technique, Turner fluorometer following Welschmeyer protocol & HPLC, Winkler titration Parameters: Active chlorophyll fluorescence, chlorophyll a and algal pigments, total thorium-234, particulate organic carbon, particulate organic nitrogen, dissolved organic carbon
AmmoniaQuantity: number of profiles = 76
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles Instruments/procedures: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), CHN analyser, Chelsea Fastracka I & II using FRR technique, SATLANTIC using FIRe technique, Turner fluorometer following Welschmeyer protocol & HPLC, Winkler titration Parameters: Active chlorophyll fluorescence, chlorophyll a and algal pigments, total thorium-234, particulate organic carbon, particulate organic nitrogen, dissolved organic carbon
SilicateQuantity: number of samples = 1502
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. Scalar Sanplus Autoanalyser
SilicateQuantity: number of samples = 260
Description: Surface intake water measurements from Surfmet system (~5m): Scalar Sanplus Autoanalyser Instruments/procedures: CHN analyser, Turner fluorometer following Welschmeyer protocol & HPLC, 14C & 32Si-labelled incubations and liquid scintillation counter. Silicification to be analysed at NOCS, ICP-AOES and further analysis at NOCS, SEM and light microscopy Parameters: Particulate organic carbon, chlorophyll a, algal pigments, primary productivity, calcification and silicification, particulate inorganic carbon, biogenic silica, RNA, DNA, single cell PCR, metaproteomics, Identification and abundance
AlkalinityQuantity: number of profiles = 76
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles Instruments/procedures: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), CHN analyser, Chelsea Fastracka I & II using FRR technique, SATLANTIC using FIRe technique, Turner fluorometer following Welschmeyer protocol & HPLC, Winkler titration Parameters: Active chlorophyll fluorescence, chlorophyll a and algal pigments, total thorium-234, particulate organic carbon, particulate organic nitrogen, dissolved organic carbon
AlkalinityQuantity: number of samples = 260
Description: Surface intake water measurements from Surfmet system (~5m): Scalar Sanplus Autoanalyser Instruments/procedures: CHN analyser, Turner fluorometer following Welschmeyer protocol & HPLC, 14C & 32Si-labelled incubations and liquid scintillation counter. Silicification to be analysed at NOCS, ICP-AOES and further analysis at NOCS, SEM and light microscopy Parameters: Particulate organic carbon, chlorophyll a, algal pigments, primary productivity, calcification and silicification, particulate inorganic carbon, biogenic silica, RNA, DNA, single cell PCR, metaproteomics, Identification and abundance
pHQuantity: number of profiles = 76
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles Instruments/procedures: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), CHN analyser, Chelsea Fastracka I & II using FRR technique, SATLANTIC using FIRe technique, Turner fluorometer following Welschmeyer protocol & HPLC, Winkler titration Parameters: Active chlorophyll fluorescence, chlorophyll a and algal pigments, total thorium-234, particulate organic carbon, particulate organic nitrogen, dissolved organic carbon
pHQuantity: number of samples = 260
Description: Surface intake water measurements from Surfmet system (~5m): Scalar Sanplus Autoanalyser Instruments/procedures: CHN analyser, Turner fluorometer following Welschmeyer protocol & HPLC, 14C & 32Si-labelled incubations and liquid scintillation counter. Silicification to be analysed at NOCS, ICP-AOES and further analysis at NOCS, SEM and light microscopy Parameters: Particulate organic carbon, chlorophyll a, algal pigments, primary productivity, calcification and silicification, particulate inorganic carbon, biogenic silica, RNA, DNA, single cell PCR, metaproteomics, Identification and abundance
Trace elementsQuantity: number of profiles = 76
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles Instruments/procedures: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), CHN analyser, Chelsea Fastracka I & II using FRR technique, SATLANTIC using FIRe technique, Turner fluorometer following Welschmeyer protocol & HPLC, Winkler titration Parameters: Active chlorophyll fluorescence, chlorophyll a and algal pigments, total thorium-234, particulate organic carbon, particulate organic nitrogen, dissolved organic carbon
Trace elementsQuantity: number of stations = 9
Description: Stand alone pumping systems (SAPS) (27, 60 & 100m) Instruments/procedures: GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), flow-injection chemiluminescence, HPLC Parameters: Iron, Total thorium-234, algal pigments
Trace elementsQuantity: number of samples = 50
Description: Surface intake water measurements from Trace Metal Tow Fish Instruments/procedures: Flow-injection chemiluminescence, flow-injection with fluorescence detection of the lumigallion-aluminium complex Parameters: Iron and aluminium
IsotopesQuantity: number of profiles = 76
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles Instruments/procedures: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), CHN analyser, Chelsea Fastracka I & II using FRR technique, SATLANTIC using FIRe technique, Turner fluorometer following Welschmeyer protocol & HPLC, Winkler titration Parameters: Active chlorophyll fluorescence, chlorophyll a and algal pigments, total thorium-234, particulate organic carbon, particulate organic nitrogen, dissolved organic carbon
IsotopesQuantity: number of stations = 9
Description: Stand alone pumping systems (SAPS) (27, 60 & 100m) Instruments/procedures: GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), flow-injection chemiluminescence, HPLC Parameters: Iron, Total thorium-234, algal pigments
Biology and fisheries 
Primary productivityQuantity: number of experiments = 3
Description: Nutrient addition bioassay and Variable-pCO2 experiments
Primary productivityQuantity: number of profiles = 16
Description: Vertical CTD discrete profiles Instruments/procedures: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. ICP-AOES and further analysis at NOCS, Flow cytometry, SEM and light microscopy. Samples stored for analysis at NOCS, 14C & 32Si-labelled incubations, liquid scintillation counter, ATU inhibitor Parameters: Particulate inorganic carbon, biogenic silica, hemes, amino acids, RNA, DNA, single cell PCR, identification and abundance, primary productivity, calcification, silicification and nitrification
Primary productivityQuantity: number of samples = 260
Description: Surface intake water measurements from Surfmet system (~5m): Scalar Sanplus Autoanalyser Instruments/procedures: CHN analyser, Turner fluorometer following Welschmeyer protocol & HPLC, 14C & 32Si-labelled incubations and liquid scintillation counter. Silicification to be analysed at NOCS, ICP-AOES and further analysis at NOCS, SEM and light microscopy Parameters: Particulate organic carbon, chlorophyll a, algal pigments, primary productivity, calcification and silicification, particulate inorganic carbon, biogenic silica, RNA, DNA, single cell PCR, metaproteomics, Identification and abundance
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 9
Description: Stand alone pumping systems (SAPS) (27, 60 & 100m) Instruments/procedures: GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), flow-injection chemiluminescence, HPLC Parameters: Iron, Total thorium-234, algal pigments
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 93
Description: Vertical CTD profiles (5-2800m) Instruments/procedures: Seabird 911+ titanium unit & stainless steel unit with Seabird SBE 43 oxygen sensor
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 260
Description: Surface intake water measurements from Surfmet system (~5m): Scalar Sanplus Autoanalyser Instruments/procedures: CHN analyser, Turner fluorometer following Welschmeyer protocol & HPLC, 14C & 32Si-labelled incubations and liquid scintillation counter. Silicification to be analysed at NOCS, ICP-AOES and further analysis at NOCS, SEM and light microscopy Parameters: Particulate organic carbon, chlorophyll a, algal pigments, primary productivity, calcification and silicification, particulate inorganic carbon, biogenic silica, RNA, DNA, single cell PCR, metaproteomics, Identification and abundance
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: track kilometres = 1369
Description: Continuous undulating tow measurements from SeaSoar (350-450m maximum depth)
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of profiles = 76
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles Instruments/procedures: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), CHN analyser, Chelsea Fastracka I & II using FRR technique, SATLANTIC using FIRe technique, Turner fluorometer following Welschmeyer protocol & HPLC, Winkler titration Parameters: Active chlorophyll fluorescence, chlorophyll a and algal pigments, total thorium-234, particulate organic carbon, particulate organic nitrogen, dissolved organic carbon
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: activity duration in days = 29
Description: Meteorological and surface intake water measurements from Surfmet system
Particulate organic matter (inc POC, PON)Quantity: number of profiles = 76
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles Instruments/procedures: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), CHN analyser, Chelsea Fastracka I & II using FRR technique, SATLANTIC using FIRe technique, Turner fluorometer following Welschmeyer protocol & HPLC, Winkler titration Parameters: Active chlorophyll fluorescence, chlorophyll a and algal pigments, total thorium-234, particulate organic carbon, particulate organic nitrogen, dissolved organic carbon
Particulate organic matter (inc POC, PON)Quantity: number of samples = 260
Description: Surface intake water measurements from Surfmet system (~5m): Scalar Sanplus Autoanalyser Instruments/procedures: CHN analyser, Turner fluorometer following Welschmeyer protocol & HPLC, 14C & 32Si-labelled incubations and liquid scintillation counter. Silicification to be analysed at NOCS, ICP-AOES and further analysis at NOCS, SEM and light microscopy Parameters: Particulate organic carbon, chlorophyll a, algal pigments, primary productivity, calcification and silicification, particulate inorganic carbon, biogenic silica, RNA, DNA, single cell PCR, metaproteomics, Identification and abundance
Particulate organic matter (inc POC, PON)Quantity: number of stations = 9
Description: Stand alone pumping systems (SAPS) (27, 60 & 100m) Instruments/procedures: GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), flow-injection chemiluminescence, HPLC Parameters: Iron, Total thorium-234, algal pigments
Dissolved organic matter (inc DOC)Quantity: number of profiles = 76
Description: Vertical CTD discrete profiles: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles Instruments/procedures: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), CHN analyser, Chelsea Fastracka I & II using FRR technique, SATLANTIC using FIRe technique, Turner fluorometer following Welschmeyer protocol & HPLC, Winkler titration Parameters: Active chlorophyll fluorescence, chlorophyll a and algal pigments, total thorium-234, particulate organic carbon, particulate organic nitrogen, dissolved organic carbon
Biochemical measurements (eg lipids, amino acids)Quantity: number of stations = 9
Description: Stand alone pumping systems (SAPS) (27, 60 & 100m) Instruments/procedures: GM Multicounter System (RisØ GM-25-5A) following Morris et al. (2007), flow-injection chemiluminescence, HPLC Parameters: Iron, Total thorium-234, algal pigments
Biochemical measurements (eg lipids, amino acids)Quantity: number of samples = 260
Description: Surface intake water measurements from Surfmet system (~5m): Scalar Sanplus Autoanalyser Instruments/procedures: CHN analyser, Turner fluorometer following Welschmeyer protocol & HPLC, 14C & 32Si-labelled incubations and liquid scintillation counter. Silicification to be analysed at NOCS, ICP-AOES and further analysis at NOCS, SEM and light microscopy Parameters: Particulate organic carbon, chlorophyll a, algal pigments, primary productivity, calcification and silicification, particulate inorganic carbon, biogenic silica, RNA, DNA, single cell PCR, metaproteomics, Identification and abundance
Biochemical measurements (eg lipids, amino acids)Quantity: number of profiles = 16
Description: Vertical CTD discrete profiles Instruments/procedures: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. ICP-AOES and further analysis at NOCS, Flow cytometry, SEM and light microscopy. Samples stored for analysis at NOCS, 14C & 32Si-labelled incubations, liquid scintillation counter, ATU inhibitor Parameters: Particulate inorganic carbon, biogenic silica, hemes, amino acids, RNA, DNA, single cell PCR, identification and abundance, primary productivity, calcification, silicification and nitrification
PhytoplanktonQuantity: track kilometres = 1369
Description: Continuous undulating tow measurements from SeaSoar (350-450m maximum depth)
PhytoplanktonQuantity: number of samples = 260
Description: Surface intake water measurements from Surfmet system (~5m): Scalar Sanplus Autoanalyser Instruments/procedures: CHN analyser, Turner fluorometer following Welschmeyer protocol & HPLC, 14C & 32Si-labelled incubations and liquid scintillation counter. Silicification to be analysed at NOCS, ICP-AOES and further analysis at NOCS, SEM and light microscopy Parameters: Particulate organic carbon, chlorophyll a, algal pigments, primary productivity, calcification and silicification, particulate inorganic carbon, biogenic silica, RNA, DNA, single cell PCR, metaproteomics, Identification and abundance
PhytoplanktonQuantity: number of profiles = 16
Description: Vertical CTD discrete profiles Instruments/procedures: Seabird 911+ stainless steel unit with SBE carousel and 24 x 20L OTE bottles. ICP-AOES and further analysis at NOCS, Flow cytometry, SEM and light microscopy. Samples stored for analysis at NOCS, 14C & 32Si-labelled incubations, liquid scintillation counter, ATU inhibitor Parameters: Particulate inorganic carbon, biogenic silica, hemes, amino acids, RNA, DNA, single cell PCR, identification and abundance, primary productivity, calcification, silicification and nitrification
ZooplanktonQuantity: number of deployments = 12
Description: Vertical plankton nets (~100m) Parameters: Mesozooplankton community structure and abundance
ZooplanktonQuantity: track kilometres = 1369
Description: Continuous undulating tow measurements from SeaSoar (350-450m maximum depth)
Other biological/fisheries measurementQuantity: number of stations = 65
Description: Vertical CTD discrete profiles (~5-200m) Instruments/procedures: Seabird 911+ stainless steel and titanium unit with SBE carousel and 24 x 20/10L OTE bottles. Flow cytometry. 35S-methinonine & 3H-leucine labelled incubations, fluorescence in situ hybridisation to be analysed at NOCS Parameters: Bacterial identification and abundance, bacterial production and bacterivory
Meteorology 
Incident radiationQuantity: activity duration in days = 29
Description: Meteorological and surface intake water measurements from Surfmet system
Routine standard measurementsQuantity: activity duration in days = 29
Description: Meteorological and surface intake water measurements from Surfmet system
Atmospheric chemistryQuantity: number of samples = 20
Description: Atmospheric aerosol chemistry (on monkey island)
Moorings, landers, buoys 
Physical oceanography 
Current profiler (eg ADCP)59° 29' 49" N  19° 59' 8" W — Moored sediment trap STC equipped with upward looking 75 kHz ADCP recovered on the 1/8/2007
Current profiler (eg ADCP)59° 30' 19" N  20° 0' 46" W — Moored sediment trap STC equipped with upward looking 75 kHz ADCP deployed on the 14/8/2007
Biology and fisheries 
Sediment traps59° 38' 42" N  18° 46' 23" W — Moored sediment trap STNE recovered on the 28/7/2007
Sediment traps60° 0' 0" N  20° 48' 41" W — Moored sediment trap STNW recovered on the 29/7/2007
Sediment traps59° 29' 49" N  19° 59' 8" W — Moored sediment trap STC equipped with upward looking 75 kHz ADCP recovered on the 1/8/2007
Sediment traps58° 51' 57" N  20° 24' 10" W — Moored sediment trap STS recovered on the 2/8/2007
Sediment traps59° 59' 53" N  20° 51' 30" W — Moored sediment trap STNW deployed on the 9/8/2007
Sediment traps59° 39' 37" N  18° 50' 21" W — Moored sediment trap STNE deployed on the 10/8/2007
Sediment traps59° 30' 19" N  20° 0' 46" W — Moored sediment trap STC equipped with upward looking 75 kHz ADCP deployed on the 14/8/2007
Sediment traps59° 42' 47" N  20° 27' 47" W — Pelagra drifting sediment trap deployed on 29/7/07 to 500m but experienced ballast problems
Sediment traps59° 28' 59" N  20° 0' 0" W — Pelagra drifting sediment trap deployed on 1/8/07 to 500m but experienced ballast problems
Sediment traps60° 0' 0" N  20° 26' 59" W — Pelagra drifting sediment trap deployed on 9/8/07 to 500m but experienced ballast problems
Sediment traps59° 12' 0" N  19° 51' 0" W — Pelagra drifting sediment trap deployed on 14/8/07 to 500m but experienced ballast problems
Sediment traps59° 39' 59" N  18° 45' 0" W — Pelagra drifting sediment trap deployed on 17/8/07 to 500m but experienced ballast problems
Sediment traps59° 33' 59" N  18° 48' 0" W — Pelagra drifting sediment trap deployed on 21/8/07 to 500m but experienced ballast problems
Sediment traps58° 52' 8" N  20° 22' 2" W — Moored sediment trap STS deployed on the 15/8/2007
Sediment traps59° 42' 0" N  18° 33' 59" W — Pelagra drifting sediment trap deployed on 21/8/07 to 500m but experienced ballast problems
Data held at BODC Get data
Discrete samples 
53  All plastic clean surface pumped supplyDissolved metal concentrations in the water column
98  CTD frame plus rosette samplerNitrification rate in the water column
Dissolved metal concentrations in the water column
Particulate total and organic carbon concentrations in the water column
Particulate total and organic nitrogen concentrations in the water column
Radioactivity in water bodies
Bacteria generic abundance in water bodies
Phytoplankton taxonomic abundance in water bodies
Uptake of other nutrients in the water column
Primary production in the water column
Concentration of silicon species in the water column
Bacterial production in the water column
Chlorophyll pigment concentrations in water bodies
Silicate concentration parameters in the water column
Alkalinity, acidity and pH of the water column
Salinity of the water column
Particulate inorganic carbon concentrations in the water column
Organometallic and organometalloid species concentration parameters in water bodies
Plankton abundance per unit volume of the water column
Total dissolved inorganic carbon (TCO2) concentration in the water column
Variable fluorescence parameters
Nitrate concentration parameters in the water column
Phosphate concentration parameters in the water column
Particulate amino acid concentrations in the water column
Dissolved oxygen parameters in the water column
Experiment state variables
4  Instrument mooring
839  Sample taken from ship's non-toxic supplyParticulate total and organic carbon concentrations in the water column
Particulate total and organic nitrogen concentrations in the water column
Phytoplankton taxonomic abundance in water bodies
Primary production in the water column
Concentration of silicon species in the water column
Chlorophyll pigment concentrations in water bodies
Silicate concentration parameters in the water column
Alkalinity, acidity and pH of the water column
Salinity of the water column
Total dissolved inorganic carbon (TCO2) concentration in the water column
Nitrate concentration parameters in the water column
Phosphate concentration parameters in the water column
38  Stand-alone pumpsParticulate total and organic carbon concentrations in the water column
Particulate total and organic nitrogen concentrations in the water column
Radioactivity in water bodies
Silicate concentration parameters in the water column
Particulate inorganic carbon concentrations in the water column