Resources

RRS Discovery DY111

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Discovery (74EQ)
Cruise identifierDY111
Cruise period2019-12-02 — 2020-01-09
StatusCompleted
Port of departurePunta Arenas, Chile
Port of returnPunta Arenas, Chile
PurposeResearch
ObjectivesCUSTARD - Carbon Uptake and Seasonal Traits of Antarctic Remineralisation Depth. The CUSTARD project examines how seasonal changes in nutrient availability for phytoplankton, at a key junction of the global ocean circulation, influence how long carbon is trapped in the ocean rather than escaping to the atmosphere as carbon dioxide. DY111 was a process cruise immediately prior to the mooring recovery cruise, to allow a more detailed study of the biogeochemistry of the site at the key spring bloom period.

Objectives
1. Deploy two other gliders (just for the duration of the cruise)
2. Deploy 6 BGC ARGO floats on behalf of the SOCCOM project
3. Make multiple visits to 3 sites along 89 W (OOI, TN at 57S and TS at 60S)
4. Carry out a full depth CTD transect between OOI and TS at 1 degree latitude resolution.

All objectives were met, though one glider had to be recovered immediately after deployment due to a leak. Additionally, a modest spatial survey was carried out collecting underway data and samples along a grid-pattern extending 90km west of 89W, to assess upstream properties and gradients.
Chief scientistAdrian P Martin (National Oceanography Centre, Southampton)
Cruise reportRRS Discovery DY111 cruise report dy111.pdf (7.70 MB) 
Ocean/sea areas 
GeneralSouth East Pacific Ocean (limit 140W)
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 36
Description: Salinity from underway
Surface measurements underway (T,S)Quantity: activity duration in days = 36
Description: Underway surface hydrography, meteorology, bathymetry and navigation
CTD stationsQuantity: number of profiles = 65
Description: CTD frame (CTD, transmissometer, fluorometer, optode, optical backscatter, PAR)
CTD stationsQuantity: number of profiles = 43
Description: Salinity from CTD niskins
Optics (eg underwater light levels)Quantity: number of profiles = 43
Description: vLight absorption from CTD niskins
Current profiler (eg ADCP)Quantity: activity duration in days = 36
Description: VMADCP
Chemical oceanography 
OxygenQuantity: number of profiles = 65
Description: Diss. Oxygen from CTD niskins
Carbon dioxideQuantity: activity duration in days = 36
Description: pCO22 from underway
Carbon dioxideQuantity: number of profiles = 43
Description: DIC from CTD niskins
Carbon dioxideQuantity: activity duration in days = 36
Description: DIC from underway
PhosphateQuantity: number of profiles = 65
Description: Macronutrients (Si(OH)4, NO, PO) from CTD niskins
NitrateQuantity: number of profiles = 65
Description: Macronutrients (Si(OH)4, NO, PO) from CTD niskins
NitrateQuantity: activity duration in days = 36
Description: Nitrate from underway
NitriteQuantity: number of profiles = 65
Description: Macronutrients (Si(OH)4, NO, PO) from CTD niskins
SilicateQuantity: number of profiles = 65
Description: Macronutrients (Si(OH)4, NO, PO) from CTD niskins
AlkalinityQuantity: number of profiles = 43
Description: TA from CTD niskins
AlkalinityQuantity: activity duration in days = 36
Description: TA from underway
IsotopesQuantity: number of profiles = 43
Description: Thorium from CTD niskins
IsotopesQuantity: number of experiments = 17
Description: Thorium from SAPS
IsotopesQuantity: number of experiments = 17
Description: 14C from incubations
IsotopesQuantity: number of profiles = 43
Description: 14C from CTD niskins
Contamination 
Trace metalsQuantity: number of deployments = 22
Description: TM particulates from SAPS
Trace metalsQuantity: number of profiles = 22
Description: Diss. And particulate trace metals from CTD niskins
Other contaminant measurementsQuantity: number of deployments = 22
Description: Microplastics from SAPS
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of profiles = 43
Description: HPCL pigments from CTD niskins
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of profiles = 43
Description: Chl-a from CTD niskins
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: activity duration in days = 36
Description: Chl-a from underway
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of profiles = 65
Description: CTD frame (CTD, transmissometer, fluorometer, optode, optical backscatter, PAR)
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: activity duration in days = 36
Description: Fast Repetition Rate Fluorimeter (FRRF3)
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of deployments = 22
Description: Chl from Marine Snow Catcher
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of experiments = 17
Description: Chl-a from incubations
Particulate organic matter (inc POC, PON)Quantity: number of profiles = 43
Description: POC from CTD niskins
Particulate organic matter (inc POC, PON)Quantity: number of profiles = 43
Description: BSi from CTD niskins
Particulate organic matter (inc POC, PON)Quantity: number of experiments = 17
Description: Bsi from incubations
Particulate organic matter (inc POC, PON)Quantity: number of experiments = 17
Description: PON from incubations
Particulate organic matter (inc POC, PON)Quantity: number of experiments = 17
Description: PABS from incubations
Particulate organic matter (inc POC, PON)Quantity: number of experiments = 17
Description: POC from incubations
Particulate organic matter (inc POC, PON)Quantity: number of profiles = 43
Description: PON from CTD niskins
Particulate organic matter (inc POC, PON)Quantity: number of experiments = 17
Description: BSi, POC from SAPS
Particulate organic matter (inc POC, PON)Quantity: number of deployments = 22
Description: TM particulates from SAPS
Particulate organic matter (inc POC, PON)Quantity: number of deployments = 25
Description: Red Camera Frame
Particulate organic matter (inc POC, PON)Quantity: number of deployments = 22
Description: PON from Marine Snow Catcher
Particulate organic matter (inc POC, PON)Quantity: number of deployments = 22
Description: POC from Marine Snow Catcher
Particulate organic matter (inc POC, PON)Quantity: number of deployments = 22
Description: Bsi from Marine Snow Catcher
Particulate organic matter (inc POC, PON)Quantity: number of deployments = 22
Description: Calcite from Marine Snow Catcher
Particulate organic matter (inc POC, PON)Quantity: number of profiles = 65
Description: Underwater Vision Profiler (UVP) [CTD frame]
Particulate organic matter (inc POC, PON)Quantity: number of profiles = 65
Description: CTD frame (CTD, transmissometer, fluorometer, optode, optical backscatter, PAR)
Particulate organic matter (inc POC, PON)Quantity: number of profiles = 43
Description: PABS from CTD niskins
Dissolved organic matter (inc DOC)Quantity: number of profiles = 43
Description: DOC from CTD niskins
PhytoplanktonQuantity: number of profiles = 43
Description: Phytoplankton biomass, microscopy from CTD niskins
Other biological/fisheries measurementQuantity: number of deployments = 22
Description: Funghi DNA from SAPS
Meteorology 
Upper air observationsQuantity: activity duration in days = 36
Description: Underway surface hydrography, meteorology, bathymetry and navigation
Incident radiationQuantity: activity duration in days = 36
Description: Underway surface hydrography, meteorology, bathymetry and navigation
Moorings, landers, buoys 
Chemical oceanography 
Nitrate54° 0' 0" S  89° 0' 0" W — OOI surface mooring (data goes live to public domain) augmented with NOC nitrate and silicate sensors
Silicate54° 0' 0" S  89° 0' 0" W — OOI surface mooring (data goes live to public domain) augmented with NOC nitrate and silicate sensors