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RRS James Cook JC192

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS James Cook (740H)
Cruise identifierJC192
Cruise period2020-03-09 — 2020-03-28
StatusCompleted
Port of departureSanta Cruz de Tenerife, Spain
Port of returnSouthampton, United Kingdom
PurposeResearch
ObjectivesThe purpose of RRS James Cook cruise JC192 was to refurbish the RAPID 26°N array of moorings that span the Atlantic from the Bahamas to the Canary Islands. The cruise started in Santa Cruz de Tenerife on Monday 9th March 2020 and ended on Saturday 28th November at Southampton, UK. The moorings are part of a purposeful Atlantic wide array that observes the Atlantic Meridional Overturning Circulation and the associated heat and freshwater transports. The RAPID-MOCHA-WBTS array is a joint UK- US programme. During JC192 moorings were serviced at sites: EBH4, EBH4L, EBH3, EBH2, EBH1, EBH1L, EBHi, EB1, EB1L. Sites with suffix ‘L’ denote landers fitted with bottom pressure recorders. Two Pressure Inverted Echo Sounder (PIES) landers were deployed for NOAA AOML. Moorings were equipped with instruments to measure temperature, conductivity and pressure, and a number of moorings were also equipped with current meters and/or oxygen sensors. The ABC Fluxes project extends the measurements on the RAPID 26°N array to include biological and chemical measurements. CTD stations were conducted throughout the cruise for purposes of providing pre- and post- deployment calibrations for mooring instrumentation (including oxygen and carbonate chemistry sampling) and for testing mooring releases prior to deployment. Shipboard underway measurements were systematically logged, processed and calibrated, including: surface meteorology, 5m depth sea temperatures and salinities, water depth, and navigation. Water velocity profiles from 15 m to approximately 800 m depth were obtained using two vessel mounted Acoustic Doppler Current Profilers (one 75 kHz and one 150 kHz).
Chief scientistBen I Moat (National Oceanography Centre, Southampton)
Cruise reportRRS James Cook JC192 cruise report jc192.pdf (58.95 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 12
Description: Underway measurement were made of meteorological variables (wind speed and direction, air temperature and humidity, surface pressure and irradiance); surface (5m) temperature and salinity; subsurface currents from 150kHz and 75 kHz ADCPs and bathymetry from single and multi-beam echo sounders.
CTD stationsQuantity: number of stations = 10
Description: CTD stations, vertical profiles of conductivity, temperature, pressure and oxygen. Samples were taken for calibration of salinity and oxygen
Current profiler (eg ADCP)Quantity: activity duration in days = 12
Description: Underway measurement were made of meteorological variables (wind speed and direction, air temperature and humidity, surface pressure and irradiance); surface (5m) temperature and salinity; subsurface currents from 150kHz and 75 kHz ADCPs and bathymetry from single and multi-beam echo sounders.
Chemical oceanography 
OxygenQuantity: number of stations = 10
Description: CTD stations, vertical profiles of conductivity, temperature, pressure and oxygen. Samples were taken for calibration of salinity and oxygen
Carbon dioxideQuantity: number of stations = 1
Description: On selected CTD stations samples were taken and stored for later analysis of dissolved inorganic carbon, and total alkalinity
PhosphateQuantity: number of stations = 1
Description: On selected CTD stations samples were taken and stored for later analysis of inorganic nutrients and organic nitrogen
Total - PQuantity: number of stations = 1
Description: On selected CTD stations samples were taken and stored for later analysis of inorganic nutrients and organic nitrogen
NitrateQuantity: number of stations = 1
Description: On selected CTD stations samples were taken and stored for later analysis of inorganic nutrients and organic nitrogen
NitriteQuantity: number of stations = 1
Description: On selected CTD stations samples were taken and stored for later analysis of inorganic nutrients and organic nitrogen
SilicateQuantity: number of stations = 1
Description: On selected CTD stations samples were taken and stored for later analysis of inorganic nutrients and organic nitrogen
pHQuantity: number of stations = 1
Description: On selected CTD stations samples were taken and stored for later analysis of dissolved inorganic carbon, and total alkalinity
Meteorology 
Incident radiationQuantity: activity duration in days = 12
Description: Underway measurement were made of meteorological variables (wind speed and direction, air temperature and humidity, surface pressure and irradiance); surface (5m) temperature and salinity; subsurface currents from 150kHz and 75 kHz ADCPs and bathymetry from single and multi-beam echo sounders.
Routine standard measurementsQuantity: activity duration in days = 12
Description: Underway measurement were made of meteorological variables (wind speed and direction, air temperature and humidity, surface pressure and irradiance); surface (5m) temperature and salinity; subsurface currents from 150kHz and 75 kHz ADCPs and bathymetry from single and multi-beam echo sounders.
Geology and geophysics 
Single-beam echosoundingQuantity: activity duration in days = 12
Description: Underway measurement were made of meteorological variables (wind speed and direction, air temperature and humidity, surface pressure and irradiance); surface (5m) temperature and salinity; subsurface currents from 150kHz and 75 kHz ADCPs and bathymetry from single and multi-beam echo sounders.
Multi-beam echosoundingQuantity: activity duration in days = 12
Description: Underway measurement were made of meteorological variables (wind speed and direction, air temperature and humidity, surface pressure and irradiance); surface (5m) temperature and salinity; subsurface currents from 150kHz and 75 kHz ADCPs and bathymetry from single and multi-beam echo sounders.
Moorings, landers, buoys 
Physical oceanography 
CTD stations36° 22' 18" N  13° 32' 17" W — Argo #8585, 0-2000m
CTD stations23° 44' 48" N  25° 30' 17" W — Argo #8583, 0-2000m
Subsurface temperature and salinity measurements27° 51' 0" N  13° 32' 23" W — 10 CTD, 1 Oxygen, 1CM, 100m-10000m recover
Subsurface temperature and salinity measurements23° 44' 23" N  24° 9' 29" W — 18 CTD, 6 oxygen, 50m-5000m. deploy
Subsurface temperature and salinity measurements23° 44' 23" N  24° 9' 29" W — 18 CTD, 2 CM, 9 oxygen, 50m-5000m. 1 pH, 1 pC02, 1 sampler, recover
Subsurface temperature and salinity measurements27° 51' 0" N  13° 32' 23" W — 11 CTD, 1 Oxygen, 100m-10000m deploy
Subsurface temperature and salinity measurements24° 56' 12" N  21° 16' 0" W — 3 CTD, 1 CM, 3500m-4500m
Subsurface temperature and salinity measurements27° 13' 18" N  15° 25' 18" W — 2CTD, 1CM 2500m-3000m
Subsurface temperature and salinity measurements27° 36' 53" N  14° 12' 36" W — 3 CTD, 1 CM, 1600m-2000m
Subsurface temperature and salinity measurements27° 48' 29" N  13° 44' 48" W — 14 CTD, 3 oxygen, 4CM, 100m-1400m
Current meters24° 56' 12" N  21° 16' 0" W — 3 CTD, 1 CM, 3500m-4500m
Current meters23° 44' 23" N  24° 9' 29" W — 18 CTD, 2 CM, 9 oxygen, 50m-5000m. 1 pH, 1 pC02, 1 sampler, recover
Current meters27° 48' 29" N  13° 44' 48" W — 14 CTD, 3 oxygen, 4CM, 100m-1400m
Current meters27° 36' 53" N  14° 12' 36" W — 3 CTD, 1 CM, 1600m-2000m
Current meters27° 13' 18" N  15° 25' 18" W — 2CTD, 1CM 2500m-3000m
Current meters23° 44' 23" N  24° 9' 29" W — 18 CTD, 6 oxygen, 50m-5000m. deploy
Current meters27° 51' 0" N  13° 32' 23" W — 11 CTD, 1 Oxygen, 100m-10000m deploy
Current meters27° 51' 0" N  13° 32' 23" W — 10 CTD, 1 Oxygen, 1CM, 100m-10000m recover
Sea level (inc. bot. press., inverted echosounder)27° 12' 11" N  15° 25' 0" W — 2 bottom pressure recorders, 3031m
Sea level (inc. bot. press., inverted echosounder)27° 52' 5" N  13° 31' 54" W — 1 PIES, 993m
Sea level (inc. bot. press., inverted echosounder)23° 48' 0" N  24° 8' 30" W — 2 bottom pressure recorders, 5089m
Sea level (inc. bot. press., inverted echosounder)23° 46' 23" N  24° 9' 29" W — 1 PIES, 5089m
Sea level (inc. bot. press., inverted echosounder)27° 52' 30" N  13° 30' 47" W — 2 bottom pressure recorders, 993m
Chemical oceanography 
Oxygen23° 44' 23" N  24° 9' 29" W — 18 CTD, 6 oxygen, 50m-5000m. deploy
Oxygen23° 44' 23" N  24° 9' 29" W — 18 CTD, 2 CM, 9 oxygen, 50m-5000m. 1 pH, 1 pC02, 1 sampler, recover
Carbon dioxide23° 44' 23" N  24° 9' 29" W — 18 CTD, 2 CM, 9 oxygen, 50m-5000m. 1 pH, 1 pC02, 1 sampler, recover
Carbon dioxide23° 44' 23" N  24° 9' 29" W — 18 CTD, 6 oxygen, 50m-5000m. deploy
pH23° 44' 23" N  24° 9' 29" W — 18 CTD, 2 CM, 9 oxygen, 50m-5000m. 1 pH, 1 pC02, 1 sampler, recover
pH23° 44' 23" N  24° 9' 29" W — 18 CTD, 6 oxygen, 50m-5000m. deploy