Cruise inventory

RRS Charles Darwin CD170

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Charles Darwin (74AB)
Cruise identifierCD170
Cruise period2005-04-02 — 2005-04-27
StatusCompleted
Port of departureSanta Cruz de Tenerife, Spain
Port of returnSt. George's, Bermuda
PurposeResearch
ObjectivesCD170 was a collaborative cruise with the Knorr cruise KN182_2. The latter cruise was conducted between 2 May 2005 and 26 May 2005. These cruises were completed as part of the UK Natural Environment Research Council (NERC) funded RAPID Programme and the US National Science Federation (NSF) funded MOCHA Programme to monitor the Atlantic Meridional Overturning Circulation at 26.5 degrees North. The primary purpose of both cruises was to service the 26.5 degrees North mooring array deployed in 2004 during RRS Discovery cruises D277 and D278. These cruises are the first annual refurbishment of this array.
Chief scientistStuart A Cunningham (Southampton Oceanography Centre)
ProjectRAPID/MOCHA
Coordinating bodyNOC/RSMAS/AOML
Cruise reportRRS Charles Darwin CD170 cruise report cd170_and_kn182_2.pdf — access key 'C' (6.33 MB) 
Ocean/sea areas 
GeneralNorth Atlantic Ocean
SpecificEast-West Transatlantic crossing between 23.8 and 32.2deg N.
Track chartsRRS Charles Darwin CD170 cruise track — cd170trk_2_05.pdf (0.32 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: number of samples = 59
Description: Discrete TSG samples
Water bottle stationsQuantity: number of samples = 120
Description: Water bottle samples on CTD upcast for discrete salinity analysis.
CTD stationsQuantity: number of stations = 9
Description: Seabird 9/11. 9 CTD casts. Parameters: temperature, conductivity, pressure. Also on frame: fluorometer, transmissometer, oxygen sensor (1st cast only), OBS (turbidity), BBRTD (backscatter).
CTD stationsQuantity: number of stations = 9
Description: Calibration of various mooring instruments carried out on each cast.
Current metersQuantity: number of stations = 9
Description: Calibration of various mooring instruments carried out on each cast.
Current profiler (eg ADCP)Quantity: activity duration in days = 26
Description: Ship ADCP.
Meteorology 
Routine standard measurementsQuantity: activity duration in days = 25
Description: Surfmet sensors - temperature (hull and remote), conductivity, fluorometer, transmissometer, pressure (atmospheric), PAR (port and starboard), wind speed and direction, air temperature, relative humidity, TIR (port and starboard).
Geology and geophysics 
Single-beam echosoundingQuantity: activity duration in days = 22
Description: PES towed at 10m depth.
Multi-beam echosoundingQuantity: number of surveys = 5
Description: EM12 swath bathymetry surveys (includes 1 test survey) covering approximately 7 days. Focus was survey across Mid Atlantic Ridge at 24deg N.
Moorings, landers, buoys 
Physical oceanography 
CTD stations24° 28' 33" N  50° 34' 13" W — Site MAR2#1. Water depth: 5050m. Recovered 20/04/05: 6 CTDs at 2550, 3050, 3550, 4050, 4550, 5000m; 1 current meter at 5048m. 1 WLR at 5050m.
CTD stations27° 16' 17" N  15° 25' 15" W — Site EBH1#2. Water depth: 3014m. Deployed 04/04/05: 2 CTDs at 2500, 3000m.
CTD stations24° 29' 29" N  50° 15' 37" W — Site MAR1#1. Water depth: 4760m. Recovered 20/04/05: 9 CTDs at 50, 250, 600, 1000, 1600, 2500, 3000, 3500, 4000m. 1 WLR at 4760m; 1 current meter at 4500m.
CTD stations27° 52' 12" N  13° 28' 12" W — Site EBH4#2. Water depth: 817m. Deployed 03/04/05: 6 CTDs at 325, 400, 500, 600, 700, 800m.
CTD stations23° 52' 7" N  41° 5' 24" W — Site MAR4#2. Water depth: 5052m. Deployed 16/04/05. 5 CTDs at 2500, 3000, 3500, 4000, 4500m. 2 current meters at 50, 4695m; 1 mmp 51-2499m.
CTD stations27° 49' 3" N  13° 44' 20" W — Site EBH3#2. Water depth: 1413m. Deployed 04/04/05: 5 CTDs at 900, 1000, 1100, 1200, 1400m.
CTD stations27° 36' 35" N  14° 12' 51" W — Site EBH2#2. Water depth: 2021m. Deployed 04/04/05: 3 CTDs at 1600, 1800, 2000m.
CTD stations23° 55' 57" N  41° 6' 14" W — Site MAR3#2. Water depth: 5082m. Deployed 15/04/05. 6 CTDs at 2700, 3200, 3700, 4200, 4700, 5150m. 1 current meter at 5198m.
CTD stations27° 29' 16" N  14° 41' 4" W — Site EBH2#1. Water depth: 2510m. Recovered 04/04/05: 3 CTDs at 2060, 2160, 2460m; 2 current meters at 2260, 2410m; 1 WLR at 2510m.
CTD stations27° 37' 20" N  14° 12' 19" W — Site EB35#1. Water depth: 2005m. Recovered 04/04/05: 5 CTDs at 1555m 1655m 1755m 1905m 1955m; WLR at 2005m.
CTD stations23° 48' 35" N  24° 5' 43" W — Site EB1#2. Water depth: 5092m. Deployed 10/04/05. 24 CTDs at 50, 100, 175, 250, 325, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1400, 1600, 1800, 2000, 2500, 3000, 3500, 4000, 4500, 4850m.
CTD stations27° 16' 33" N  15° 24' 59" W — Site EBH1#1. Water depth: 3012m. Recovered 04/04/05: 4 CTDs at 2562, 2662, 2762, 2962m; 1 current meter at 2912m; 1 WLR at 3012m.
CTD stations24° 10' 13" N  49° 44' 59" W — Site MAR2#2. Water depth: 5213m. Deployed 22/04/05. 4 CTDs at 2550, 3180, 3800, 4430m. 1 current meter at 5048m.
CTD stations23° 55' 47" N  24° 2' 35" W — Site EB2#2. Water depth: 5092m. Deployed 10/04/05. 4 CTDs at 51, 2511, 3500, 4850m; 2 current meters at 50, 2510m; 1 mmp 52-2500m.
CTD stations26° 59' 45" N  16° 13' 50" W — Site EB3#1. Water depth: 3515m. Recovered 05/04/05: 6 CTDs at 1200, 1600, 2000, 2500, 3000, 3490m; 3 current meters at 1200, 2000, 3000m; 1 WLR at 3500m.
CTD stations27° 51' 24" N  13° 31' 14" W — Site EBH5#1. Water depth: 1015m. Recovered 03/04/05: 5 CTDs at 565, 665, 765, 915, 965m; WLR at 1015m.
CTD stations26° 50' 17" N  16° 13' 36" W — Site EB2R#1. Recovered 06/04/05: 4 CTDs at 50, 250, 1000, 2100m; 4 current meters at 100, 500, 1500, 2800m.
CTD stations24° 57' 23" N  21° 15' 35" W — Site EBHi#2. Water depth: 4499m. Deployed 08/04/05: 3 CTDs at 3500, 4000, 4500m.
CTD stations24° 31' 26" N  23° 26' 55" W — Site EB#1. Water depth: 5000m. Recovered 09/04/05: 6 CTDs at 2500, 3000, 3500, 4000, 4500, 4850m; 1 WLR at 5000m.
CTD stations25° 37' 33" N  50° 25' 6" W — Site MAR1#2. Water depth: 4870m. Deployed 23/04/05. 11 CTDs at 50, 100, 250, 600, 1000, 1600, 2000, 2500, 3000, 3500, 4000m. 2 current meters at 4500, 5200m.
CTD stations26° 59' 36" N  16° 13' 44" W — Site EBHo#2. Water depth: 3511m. Deployed 07/04/05: 1 CTD at 3500m.
CTD stations24° 29' 59" N  41° 12' 55" W — Site MAR3#1. Water depth: 5200m. Recovered 14/04/05: 6 CTDs at 2700, 3200, 3700, 4200, 4700, 5150m; 1 current meter at 5198m. 1 WLR at 5200m.
CTD stations27° 54' 30" N  13° 21' 57" W — Site EBH5#2. Water depth: 260m. Deployed 03/04/05: 4 CTDs at 50, 100, 175, 250m.
Subsurface temperature and salinity measurements27° 49' 55" N  13° 47' 18" W — Site EBH4#1. Water depth: 1510m. Recovered 03/04/05: 5 CTDs at 1060, 1160, 1260, 1410, 1460m; WLR at 1510m.
Current meters24° 29' 29" N  50° 15' 37" W — Site MAR1#1. Water depth: 4760m. Recovered 20/04/05: 9 CTDs at 50, 250, 600, 1000, 1600, 2500, 3000, 3500, 4000m. 1 WLR at 4760m; 1 current meter at 4500m.
Current meters24° 30' 6" N  41° 18' 4" W — Site MAR4#1. Water depth: 4730m. Recovered 14/04/05: 2 current meters at 50, 4555m; 1 mmp 50-4550m. 1 WLR at 4700m.
Current meters24° 29' 59" N  41° 12' 55" W — Site MAR3#1. Water depth: 5200m. Recovered 14/04/05: 6 CTDs at 2700, 3200, 3700, 4200, 4700, 5150m; 1 current meter at 5198m. 1 WLR at 5200m.
Current meters26° 50' 17" N  16° 13' 36" W — Site EB2R#1. Recovered 06/04/05: 4 CTDs at 50, 250, 1000, 2100m; 4 current meters at 100, 500, 1500, 2800m.
Current meters26° 59' 45" N  16° 13' 50" W — Site EB3#1. Water depth: 3515m. Recovered 05/04/05: 6 CTDs at 1200, 1600, 2000, 2500, 3000, 3490m; 3 current meters at 1200, 2000, 3000m; 1 WLR at 3500m.
Current meters27° 16' 33" N  15° 24' 59" W — Site EBH1#1. Water depth: 3012m. Recovered 04/04/05: 4 CTDs at 2562, 2662, 2762, 2962m; 1 current meter at 2912m; 1 WLR at 3012m.
Current meters27° 29' 16" N  14° 41' 4" W — Site EBH2#1. Water depth: 2510m. Recovered 04/04/05: 3 CTDs at 2060, 2160, 2460m; 2 current meters at 2260, 2410m; 1 WLR at 2510m.
Current meters24° 28' 33" N  50° 34' 13" W — Site MAR2#1. Water depth: 5050m. Recovered 20/04/05: 6 CTDs at 2550, 3050, 3550, 4050, 4550, 5000m; 1 current meter at 5048m. 1 WLR at 5050m.
Current meters23° 52' 7" N  41° 5' 24" W — Site MAR4#2. Water depth: 5052m. Deployed 16/04/05. 5 CTDs at 2500, 3000, 3500, 4000, 4500m. 2 current meters at 50, 4695m; 1 mmp 51-2499m.
Current meters24° 10' 13" N  49° 44' 59" W — Site MAR2#2. Water depth: 5213m. Deployed 22/04/05. 4 CTDs at 2550, 3180, 3800, 4430m. 1 current meter at 5048m.
Current meters25° 37' 33" N  50° 25' 6" W — Site MAR1#2. Water depth: 4870m. Deployed 23/04/05. 11 CTDs at 50, 100, 250, 600, 1000, 1600, 2000, 2500, 3000, 3500, 4000m. 2 current meters at 4500, 5200m.
Current meters23° 55' 57" N  41° 6' 14" W — Site MAR3#2. Water depth: 5082m. Deployed 15/04/05. 6 CTDs at 2700, 3200, 3700, 4200, 4700, 5150m. 1 current meter at 5198m.
Current meters23° 55' 47" N  24° 2' 35" W — Site EB2#2. Water depth: 5092m. Deployed 10/04/05. 4 CTDs at 51, 2511, 3500, 4850m; 2 current meters at 50, 2510m; 1 mmp 52-2500m.
Current profiler (eg ADCP)27° 53' 57" N  13° 23' 36" W — Site ADCP E#2. Water depth: 433m. Deployed 03/04/05: ADCP.
Current profiler (eg ADCP)24° 30' 6" N  41° 18' 4" W — Site MAR4#1. Water depth: 4730m. Recovered 14/04/05: 2 current meters at 50, 4555m; 1 mmp 50-4550m. 1 WLR at 4700m.
Current profiler (eg ADCP)23° 52' 7" N  41° 5' 24" W — Site MAR4#2. Water depth: 5052m. Deployed 16/04/05. 5 CTDs at 2500, 3000, 3500, 4000, 4500m. 2 current meters at 50, 4695m; 1 mmp 51-2499m.
Current profiler (eg ADCP)23° 55' 47" N  24° 2' 35" W — Site EB2#2. Water depth: 5092m. Deployed 10/04/05. 4 CTDs at 51, 2511, 3500, 4850m; 2 current meters at 50, 2510m; 1 mmp 52-2500m.
Sea level (inc. bot. press., inverted echosounder)27° 16' 33" N  15° 24' 59" W — Site EBH1#1. Water depth: 3012m. Recovered 04/04/05: 4 CTDs at 2562, 2662, 2762, 2962m; 1 current meter at 2912m; 1 WLR at 3012m.
Sea level (inc. bot. press., inverted echosounder)27° 29' 16" N  14° 41' 4" W — Site EBH2#1. Water depth: 2510m. Recovered 04/04/05: 3 CTDs at 2060, 2160, 2460m; 2 current meters at 2260, 2410m; 1 WLR at 2510m.
Sea level (inc. bot. press., inverted echosounder)23° 52' 6" N  41° 5' 34" W — Site MARL2. Water depth: 5041m. Deployed 16/04/05. 2 WLRs.
Sea level (inc. bot. press., inverted echosounder)26° 59' 45" N  16° 13' 50" W — Site EB3#1. Water depth: 3515m. Recovered 05/04/05: 6 CTDs at 1200, 1600, 2000, 2500, 3000, 3490m; 3 current meters at 1200, 2000, 3000m; 1 WLR at 3500m.
Sea level (inc. bot. press., inverted echosounder)24° 31' 26" N  23° 26' 55" W — Site EB#1. Water depth: 5000m. Recovered 09/04/05: 6 CTDs at 2500, 3000, 3500, 4000, 4500, 4850m; 1 WLR at 5000m.
Sea level (inc. bot. press., inverted echosounder)24° 28' 33" N  50° 34' 13" W — Site MAR2#1. Water depth: 5050m. Recovered 20/04/05: 6 CTDs at 2550, 3050, 3550, 4050, 4550, 5000m; 1 current meter at 5048m. 1 WLR at 5050m.
Sea level (inc. bot. press., inverted echosounder)27° 16' 32" N  15° 25' 1" W — Site EBL2#2. Water depth: 3024m. Deployed 07/04/05: 2 WLRs.
Sea level (inc. bot. press., inverted echosounder)24° 29' 59" N  41° 12' 55" W — Site MAR3#1. Water depth: 5200m. Recovered 14/04/05: 6 CTDs at 2700, 3200, 3700, 4200, 4700, 5150m; 1 current meter at 5198m. 1 WLR at 5200m.
Sea level (inc. bot. press., inverted echosounder)23° 48' 37" N  24° 6' 20" W — Site EBL1#2. Water depth: 5100m. Deployed 10/04/05. 2 WLRs.
Sea level (inc. bot. press., inverted echosounder)24° 29' 29" N  50° 15' 37" W — Site MAR1#1. Water depth: 4760m. Recovered 20/04/05: 9 CTDs at 50, 250, 600, 1000, 1600, 2500, 3000, 3500, 4000m. 1 WLR at 4760m; 1 current meter at 4500m.
Sea level (inc. bot. press., inverted echosounder)27° 49' 55" N  13° 47' 18" W — Site EBH4#1. Water depth: 1510m. Recovered 03/04/05: 5 CTDs at 1060, 1160, 1260, 1410, 1460m; WLR at 1510m.
Sea level (inc. bot. press., inverted echosounder)27° 37' 20" N  14° 12' 19" W — Site EB35#1. Water depth: 2005m. Recovered 04/04/05: 5 CTDs at 1555m 1655m 1755m 1905m 1955m; WLR at 2005m.
Sea level (inc. bot. press., inverted echosounder)27° 51' 24" N  13° 31' 14" W — Site EBH5#1. Water depth: 1015m. Recovered 03/04/05: 5 CTDs at 565, 665, 765, 915, 965m; WLR at 1015m.
Sea level (inc. bot. press., inverted echosounder)25° 37' 43" N  50° 24' 57" W — Site MARL1#2. Water depth: 4870m. Deployed 23/04/05. 2 WLRs.
Sea level (inc. bot. press., inverted echosounder)24° 30' 6" N  41° 18' 4" W — Site MAR4#1. Water depth: 4730m. Recovered 14/04/05: 2 current meters at 50, 4555m; 1 mmp 50-4550m. 1 WLR at 4700m.
Other physical oceanographic measurements23° 55' 47" N  24° 2' 35" W — Site EB2#2. Water depth: 5092m. Deployed 10/04/05. 4 CTDs at 51, 2511, 3500, 4850m; 2 current meters at 50, 2510m; 1 mmp 52-2500m.
Other physical oceanographic measurements24° 30' 6" N  41° 18' 4" W — Site MAR4#1. Water depth: 4730m. Recovered 14/04/05: 2 current meters at 50, 4555m; 1 mmp 50-4550m. 1 WLR at 4700m.
Other physical oceanographic measurements23° 52' 7" N  41° 5' 24" W — Site MAR4#2. Water depth: 5052m. Deployed 16/04/05. 5 CTDs at 2500, 3000, 3500, 4000, 4500m. 2 current meters at 50, 4695m; 1 mmp 51-2499m.
Data held at BODC 
Series/Profiles 
2  Acoustic doppler current profiler
Vertical velocity of the water column (currents)
Acoustic backscatter in the water column
Horizontal platform movement
Metadata parameters
Vertical spatial coordinates
Horizontal velocity of the water column (currents)
Horizontal spatial co-ordinates
Raw current meter output parameters
Date and time
Vertical velocity of the water column (currents)
Acoustic backscatter in the water column
Horizontal platform movement
Metadata parameters
Vertical spatial coordinates
Horizontal velocity of the water column (currents)
Horizontal spatial co-ordinates
Raw current meter output parameters
Date and time

BODC idDate/TimeLocationDoc.
7  Bottom pressure sensor tide gauge
Sea level
Temperature of the water column
Reference numbers
Date and time
Sea level
Temperature of the water column
Reference numbers
Date and time

BODC idDate/TimeLocationDoc.
9  CTD/STD cast
Density of the water column
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column
Density of the water column
Vertical spatial coordinates
Salinity of the water column
Temperature of the water column

BODC idDate/TimeLocationDoc.
1  Meteorological data logger
Air pressure
Wind strength and direction
Horizontal spatial co-ordinates
Air temperature
Date and time
Air pressure
Wind strength and direction
Horizontal spatial co-ordinates
Air temperature
Date and time

BODC idDate/TimeLocationDoc.
70  Moored CTD
Moored instrument depth
Electrical conductivity of the water column
Salinity of the water column
Temperature of the water column
Reference numbers
Date and time
Moored instrument depth
Electrical conductivity of the water column
Salinity of the water column
Temperature of the water column
Reference numbers
Date and time

BODC idDate/TimeLocationDoc.
5  Single-beam echosounder
Platform or instrument orientation
Bathymetry and Elevation
Horizontal platform movement
Horizontal spatial co-ordinates
Reference numbers
Date and time
Platform or instrument orientation
Bathymetry and Elevation
Horizontal platform movement
Horizontal spatial co-ordinates
Reference numbers
Date and time

BODC idDate/TimeLocationDoc.
1  Thermosalinograph
Salinity of the water column
Horizontal spatial co-ordinates
Temperature of the water column
Date and time
Salinity of the water column
Horizontal spatial co-ordinates
Temperature of the water column
Date and time

BODC idDate/TimeLocationDoc.
Discrete samples 
9  CTD frame plus rosette samplerDensity of the water column
Salinity of the water column
Temperature of the water column
59  Sample taken from ship's non-toxic supplySalinity of the water column