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BODC Cruise Metadata Report for RRS James Clark Ross (74JC) cruise JR20111127 (JR254D, JR264, JR265)

Introduction

This report collates information from the BODC cruise inventory and oceanographic databases. It presents

Cruise Inventory Information

Long name RRS James Clark Ross (74JC) cruise JR20111127 (JR254D, JR264, JR265)
Short name JR20111127 (JR254D, JR264, JR265)
Objectives and Narrative JR265: This cruise carried out the 17th complete occupation of the Drake Passage CTD section, established during the World Ocean Circulation Experiment as repeat section SR1b. It was first occupied by the National Oceanography Centre (previously IOSDL and then SOC) in collaboration with the British Antarctic Survey in 1993, and has been re-occupied most years since then. Thirty two full depth stations were performed during JR265: two test stations, and all 30 of the nominal stations for the SR1b Drake Passage section. The northern-most 9 stations have been shifted from their nominal positions to lie along 58?W, as for JC031 (Feb-Mar 2009). An initial result is that the estimated total transport measured across the section was 133 Sv which compares well to an average transport measured from the 16 previous UK cruises of 135 Sv (standard deviation of 7 Sv).
This hydrographic cruise, was carried out in conjunction with both cruise JR245D, a "Waves Aerosol and Gas Exchange Study" (WAGES) intensive observation cruise, and cruise JR264, led by NOC-L staff.
The CTD was an underwater SBE 9 plus unit equipped with the following sensors: dual temperature and conductivity sensors, a pressure sensor encased in the SBE underwater unit, a SBE-43 oxygen probe, an Aquatracka MKIII fluorometer, a transmissometer, an upward- looking downwelling PAR sensor, and an altimeter. A downward-looking LADCP (RDI Workhorse Monitor 300 kHz) was deployed on all stations. Various underway measurements were obtained, including navigation, VM-ADCP, sea surface temperature and salinity, water depth and various meteorological parameters. A practical aim during this cruise was to update the detailed guides for each of the hydrographic data streams which were first written during JR195 in 2009. The hydrographic data analysis was performed using "MSTAR", a suite of Matlab programs developed at NOCS by Brian King and used on the JCR for the first time during JR195.
Ship RRS James Clark Ross
Departure Port Stanley, Falkland Islands (Malvinas)
Departure Date 2011-11-27
Arrival Port Stanley, Falkland Islands (Malvinas)
Arrival Date 2011-12-24
Principal Scientist(s) Margaret J Yelland (National Oceanography Centre, Southampton), Miguel Angel Morales Maqueda (National Oceanography Centre, Liverpool)
Responsible Organisation WHOI-GG
Associated Project(s)
IHB Sea Areas Visited Southern Ocean
Marsden Squares Visited 483/484/485/520/521/522/523
Work Area Description Drake Passage
Work Area Bounding Polygon 70S,80W; 50S,80W; 50S,30W; 70S,30W; 70S,80W
Southern Limit 70S
Northern Limit 50S
Western Limit 80W
Eastern Limit 30W

Cruise Inventory Datasets

Physical oceanography  
Bathythermograph Quantity: activity duration in days = 11
Description: Sea floor depth using a Kongsberg EA600 single beam and EM122 multi-beam echo sounders  
CTD stations Quantity: number of stations = 32
Description: Sea water velocities using a RDI WH monitor 300 kHz lowered acoustic doppler current profiler (LADCP)  
CTD stations Quantity: number of stations = 32
Description: Temperature, conductivity, pressure, transmittance, fluorescence, oxygen and back scatter using a SeaBird SBE 9 plus mounted on a stainless steel CTD frame. Station depths ranged from 1.7 - 5702 m  
Current profiler (eg ADCP) Quantity: activity duration in days = 11
Description: Water velocities using a 75 kHz RD Instruments OS75 vessel mounted acoustic doppler current profiler (VMADCP)  
Current profiler (eg ADCP) Quantity: number of stations = 32
Description: Sea water velocities using a RDI WH monitor 300 kHz lowered acoustic doppler current profiler (LADCP)  
Optics (eg underwater light levels) Quantity: activity duration in days = 11
Description: Underway salinity, temperature, transmittance and fluorescence from SurfMet system  
Subsurface temperature and salinity measurements Quantity: activity duration in days = 11
Description: Sea floor depth using a Kongsberg EA600 single beam and EM122 multi-beam echo sounders  
Subsurface temperature and salinity measurements Quantity: activity duration in days = 11
Description: Water velocities using a 75 kHz RD Instruments OS75 vessel mounted acoustic doppler current profiler (VMADCP)  
Surface measurements underway (T,S) Quantity: activity duration in days = 11
Description: Underway salinity, temperature, transmittance and fluorescence from SurfMet system  
Surface measurements underway (T,S) Quantity: activity duration in days = 11
Description: Discrete salinity samples from underway supply, analysed using an Autosal salinometer. Used to calibrate underway salinity sensor in the OceanLogger system  
Transparency (eg transmissometer) Quantity: activity duration in days = 11
Description: Underway salinity, temperature, transmittance and fluorescence from SurfMet system  
Transparency (eg transmissometer) Quantity: number of stations = 32
Description: Temperature, conductivity, pressure, transmittance, fluorescence, oxygen and back scatter using a SeaBird SBE 9 plus mounted on a stainless steel CTD frame. Station depths ranged from 1.7 - 5702 m  
Water bottle stations Quantity: number of stations = 32
Description: Discrete salinity samples collected from CTD bottles: CTD frame fitted with SBE 32, 24-way carousel and 24 x 12 L niskin bottles. Samples analysed using an Autosal salinometer. Used to calibrate CTD salinity  
Meteorology  
Routine standard measurements Quantity: activity duration in days = 11
Description: Underway atmospheric pressure, air temperature, air humidity, total irradiance (TIR), photosynthetic radiation (PAR) from the OceanLogger system and wind speed and wind direction from the met system.  

Cruise Inventory Mooring/Buoy Operations

Latitude Longitude Data type Description
56° 8' S 57° 34' W Neutrally buoyant floats 2/12/11 02:33 GMT (CTD station 011). Deployed Met Office Argo float serial no 4901. Pressure, temperature and conductivity profiles over 5 - 2000 db
57° 6' S 57° 0' W Neutrally buoyant floats 2/12/11 16:26 GMT (CTD station 014). Deployed Met Office Argo float serial no 4902. Pressure, temperature and conductivity profiles over 5 - 2000 db
55° 9' S 58° 0' W Neutrally buoyant floats 29/11/11 14:20 GMT (CTD station 007). Deployed Met Office Argo float serial no 4900. Pressure, temperature and conductivity profiles over 5 - 2000 db
58° 3' S 56° 27' W Neutrally buoyant floats 3/12/11 07:13 GMT (CTD station 017). Deployed Met Office Argo float serial no 4903. Pressure, temperature and conductivity profiles over 5 - 2000 db
59° 0' S 55° 51' W Neutrally buoyant floats 3/12/11 21:09 GMT (CTD station 020). Deployed Met Office Argo float serial no 4999. Pressure, temperature and conductivity profiles over 5 - 2000 db
60° 0' S 55° 14' W Neutrally buoyant floats 4/12/11 10:51 GMT (CTD station 023). Deployed Met Office Argo float serial no 4998. Pressure, temperature and conductivity profiles over 5 - 2000 db

Summary of BODC Data Holdings for the Cruise

National Oceanographic Database

Summary

# Series Instrument Description Parameters
31 CTD/STD cast Chlorophyll pigment concentrations in water bodies
Density of the water column
Dissolved oxygen parameters in the water column
Electrical conductivity of the water column
Reference numbers
Salinity of the water column
Temperature of the water column
Transmittance and attenuance of the water column
Vertical spatial coordinates

Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)

Full List

BODC Reference Instrument Description Date/Time Location  
1363512 CTD/STD cast 2011-11-28 21:55Z to 2011-11-28 22:01Z 54° 47' S, 58° 0' W Click for more
1363524 CTD/STD cast 2011-11-28 23:21Z to 2011-11-28 23:32Z 54° 54' S, 57° 59' W Click for more
1363536 CTD/STD cast 2011-11-29 01:39Z to 2011-11-29 01:59Z 54° 58' S, 57° 58' W Click for more
1363548 CTD/STD cast 2011-11-29 03:33Z to 2011-11-29 03:59Z 55° 0' S, 58° 0' W Click for more
1363561 CTD/STD cast 2011-11-29 05:11Z to 2011-11-29 05:47Z 55° 2' S, 58° 0' W Click for more
1363573 CTD/STD cast 2011-11-29 11:04Z to 2011-11-29 11:48Z 55° 5' S, 58° 0' W Click for more
1363585 CTD/STD cast 2011-11-29 13:49Z to 2011-11-29 14:41Z 55° 9' S, 58° 0' W Click for more
1363597 CTD/STD cast 2011-11-29 16:43Z to 2011-11-29 17:44Z 55° 12' S, 57° 59' W Click for more
1363604 CTD/STD cast 2011-11-29 21:38Z to 2011-11-29 22:49Z 55° 31' S, 58° 1' W Click for more
1363616 CTD/STD cast 2011-12-01 18:44Z to 2011-12-01 20:11Z 55° 49' S, 57° 48' W Click for more
1363628 CTD/STD cast 2011-12-02 01:09Z to 2011-12-02 02:10Z 56° 9' S, 57° 36' W Click for more
1363641 CTD/STD cast 2011-12-02 05:51Z to 2011-12-02 06:52Z 56° 28' S, 57° 25' W Click for more
1363653 CTD/STD cast 2011-12-02 10:42Z to 2011-12-02 11:43Z 56° 46' S, 57° 13' W Click for more
1363665 CTD/STD cast 2011-12-02 15:20Z to 2011-12-02 16:27Z 57° 6' S, 57° 1' W Click for more
1363677 CTD/STD cast 2011-12-02 20:45Z to 2011-12-02 21:47Z 57° 25' S, 56° 49' W Click for more
1363689 CTD/STD cast 2011-12-03 01:19Z to 2011-12-03 02:18Z 57° 43' S, 56° 38' W Click for more
1363690 CTD/STD cast 2011-12-03 05:54Z to 2011-12-03 07:01Z 58° 3' S, 56° 27' W Click for more
1363708 CTD/STD cast 2011-12-03 10:39Z to 2011-12-03 11:44Z 58° 22' S, 56° 15' W Click for more
1363721 CTD/STD cast 2011-12-03 15:16Z to 2011-12-03 16:20Z 58° 40' S, 56° 3' W Click for more
1363733 CTD/STD cast 2011-12-03 19:58Z to 2011-12-03 21:01Z 59° 0' S, 55° 51' W Click for more
1363745 CTD/STD cast 2011-12-04 00:37Z to 2011-12-04 01:41Z 59° 19' S, 55° 39' W Click for more
1363757 CTD/STD cast 2011-12-04 05:07Z to 2011-12-04 06:09Z 59° 40' S, 55° 26' W Click for more
1363769 CTD/STD cast 2011-12-04 09:37Z to 2011-12-04 10:37Z 60° 0' S, 55° 14' W Click for more
1363770 CTD/STD cast 2011-12-04 14:26Z to 2011-12-04 15:24Z 60° 19' S, 55° 1' W Click for more
1363782 CTD/STD cast 2011-12-04 18:56Z to 2011-12-04 19:48Z 60° 39' S, 54° 48' W Click for more
1363794 CTD/STD cast 2011-12-04 22:00Z to 2011-12-04 22:44Z 60° 48' S, 54° 44' W Click for more
1363801 CTD/STD cast 2011-12-05 01:44Z to 2011-12-05 02:33Z 60° 49' S, 54° 43' W Click for more
1363813 CTD/STD cast 2011-12-05 03:43Z to 2011-12-05 04:01Z 60° 51' S, 54° 42' W Click for more
1363825 CTD/STD cast 2011-12-05 14:10Z to 2011-12-05 14:22Z 60° 58' S, 54° 37' W Click for more
1363837 CTD/STD cast 2011-12-05 15:27Z to 2011-12-05 15:34Z 61° 3' S, 54° 35' W Click for more
1363850 CTD/STD cast 2011-11-28 12:33Z to 2011-11-28 13:14Z 53° 27' S, 57° 57' W Click for more

Project Database

# Events Gear Type Parameters Held
31 CTD frame plus rosette sampler Salinity of the water column
38 Sample taken from ship's non-toxic supply Salinity of the water column

Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)

References

Track Charts

Track Chart

Reports

Cruise Report