Cruise Info. | |
---|
Ship name (ship code) | RRS Discovery (74EQ) |
---|
Cruise identifier | DY111 |
---|
Cruise period | 2019-12-02 — 2020-01-09 |
---|
Status | Completed |
---|
Port of departure | Punta Arenas, Chile |
---|
Port of return | Punta Arenas, Chile |
---|
Purpose | Research |
---|
Objectives | CUSTARD - 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 scientist | Adrian P Martin (National Oceanography Centre, Southampton) |
---|
Cruise report | (7.70 MB) |
---|
Ocean/sea areas | |
General | South 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 stations | Quantity: number of profiles = 43 Description: Salinity from CTD niskins |
CTD stations | Quantity: number of profiles = 65 Description: CTD frame (CTD, transmissometer, fluorometer, optode, optical backscatter, PAR) |
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 | |
---|
Oxygen | Quantity: number of profiles = 65 Description: Diss. Oxygen from CTD niskins |
Carbon dioxide | Quantity: activity duration in days = 36 Description: pCO22 from underway |
Carbon dioxide | Quantity: number of profiles = 43 Description: DIC from CTD niskins |
Carbon dioxide | Quantity: activity duration in days = 36 Description: DIC from underway |
Phosphate | Quantity: number of profiles = 65 Description: Macronutrients (Si(OH)4, NO, PO) from CTD niskins |
Nitrate | Quantity: number of profiles = 65 Description: Macronutrients (Si(OH)4, NO, PO) from CTD niskins |
Nitrate | Quantity: activity duration in days = 36 Description: Nitrate from underway |
Nitrite | Quantity: number of profiles = 65 Description: Macronutrients (Si(OH)4, NO, PO) from CTD niskins |
Silicate | Quantity: number of profiles = 65 Description: Macronutrients (Si(OH)4, NO, PO) from CTD niskins |
Alkalinity | Quantity: activity duration in days = 36 Description: TA from underway |
Alkalinity | Quantity: number of profiles = 43 Description: TA from CTD niskins |
Isotopes | Quantity: number of profiles = 43 Description: 14C from CTD niskins |
Isotopes | Quantity: number of experiments = 17 Description: Thorium from SAPS |
Isotopes | Quantity: number of experiments = 17 Description: 14C from incubations |
Isotopes | Quantity: number of profiles = 43 Description: Thorium from CTD niskins |
Contamination | |
---|
Trace metals | Quantity: number of deployments = 22 Description: TM particulates from SAPS |
Trace metals | Quantity: number of profiles = 22 Description: Diss. And particulate trace metals from CTD niskins |
Other contaminant measurements | Quantity: number of deployments = 22 Description: Microplastics from SAPS |
Biology and fisheries | |
---|
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 profiles = 43 Description: HPCL pigments from CTD niskins |
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: number of experiments = 17 Description: Chl-a from incubations |
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 = 43 Description: Chl-a from CTD niskins |
Particulate organic matter (inc POC, PON) | Quantity: number of deployments = 25 Description: Red Camera Frame |
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 deployments = 22 Description: Calcite from Marine Snow Catcher |
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: TM particulates from SAPS |
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: POC from incubations |
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: BSi, POC from SAPS |
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 deployments = 22 Description: Bsi from Marine Snow Catcher |
Particulate organic matter (inc POC, PON) | Quantity: number of experiments = 17 Description: PABS from incubations |
Particulate organic matter (inc POC, PON) | Quantity: number of profiles = 43 Description: PABS from CTD niskins |
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 profiles = 43 Description: POC from CTD niskins |
Dissolved organic matter (inc DOC) | Quantity: number of profiles = 43 Description: DOC from CTD niskins |
Phytoplankton | Quantity: number of profiles = 43 Description: Phytoplankton biomass, microscopy from CTD niskins |
Other biological/fisheries measurement | Quantity: number of deployments = 22 Description: Funghi DNA from SAPS |
Meteorology | |
---|
Upper air observations | Quantity: activity duration in days = 36 Description: Underway surface hydrography, meteorology, bathymetry and navigation |
Incident radiation | Quantity: activity duration in days = 36 Description: Underway surface hydrography, meteorology, bathymetry and navigation |
Moorings, landers, buoys | |
Chemical oceanography | |
---|
Nitrate | 54° 0' 0" S 89° 0' 0" W — OOI surface mooring (data goes live to public domain) augmented with NOC nitrate and silicate sensors |
Silicate | 54° 0' 0" S 89° 0' 0" W — OOI surface mooring (data goes live to public domain) augmented with NOC nitrate and silicate sensors |