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BODC Cruise Metadata Report for RRS James Clark Ross (74JC) cruise JR20041201 (JR111, JR115)

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 JR20041201 (JR111, JR115)
Short name JR20041201 (JR111, JR115)
Objectives and Narrative 1) To determine the interannual variability of the position, structure and transport of the Antarctic Circumpolar Current (ACC) in Drake Passage;
2) To examine the fronts associated with the ACC, and to determine their positions and strengths;
3) By comparing geostrophic velocities with those measured directly (by the lowered ADCP), to determine the size of ageostrophic motions, and to attempt to estimate the barotropic components;
4) To examine the temperature and salinity structure of the water flowing through Drake Passage, and to identify thereby the significant water masses;
5) To calculate the total flux of water through Drake Passage by combining all available measurements.

POL Drake Passage Servicing was also undertaken on this cruise under the lead of Geoff Hargreaves, POL (JR111). The objectives were as follows:
To service the Sea Level Recorder at Port Stanley, Falkland Islands.
To recover the BPR and BPR/IES from the Drake Passage.
To deploy two BPRs and one BPR/IES in the Drake Passage.
To test, deploy and recover a RAPID lander.
To service the Sea Level Recorder at Rothera.
Ship RRS James Clark Ross
Departure Port Stanley, Falkland Islands (Malvinas)
Departure Date 2004-12-02
Arrival Port Stanley, Falkland Islands (Malvinas)
Arrival Date 2004-12-19
Principal Scientist(s) Elizabeth J Hawker (Southampton Oceanography Centre), Michael D Sparrow (Southampton Oceanography Centre)
Responsible Organisation Federal Maritime and Hydrographic Agency
Associated Project(s) Drake Passage repeats
IHB Sea Areas Visited South West Atlantic Ocean (limit 20W)
Marsden Squares Visited 485/522
Work Area Description Southern Ocean - Drake Passage
Work Area Bounding Polygon 70S,70W; 50S,70W; 50S,50W; 70S,50W; 70S,70W
Southern Limit 70S
Northern Limit 50S
Western Limit 70W
Eastern Limit 50W

Cruise Inventory Datasets

Physical oceanography  
CTD stations Quantity: number of stations = 37
Description: 35 full depth CTD stations were completed and 2 repeat shallows stations for biogeochemical sampling only. The full depth stations included a test station, the 30 stations for the SR1b Drake Passage repeat section and three repeat stations south of Burdwood Bank to collect LADCP data (no bottles were taken on these).  
Current profiler (eg ADCP) Quantity: number of stations = 31
Description: Lowered ADCP data were collected during the SR1b repeat section and the test station. No data were collected until station 07 as there were problems setting up the unit but stations 02, 03 and 04 were repeated so that LADCP data were eventually collected for all but 2 of the SR1b stations.  
Current profiler (eg ADCP) Quantity: activity duration in days = 19
Description: Vessel mounted ADCP data were collected and processed during most of the cruise  
Other physical oceanographic measurements Quantity: activity duration in days = 19
Description: Navigation data (Trimble 4000, Ashtech GLONASS and ADU-2, SeaTex, Gyro, Bestnav) were collected and processed during the cruise.  
Subsurface temperature and salinity measurements Quantity: activity duration in days = 19
Description: Met and subs. underway data were collected/processed during most of the cruise.  
Surface measurements underway (T,S) Quantity: activity duration in days = 19
Description: Met and subs. underway data were collected/processed during most of the cruise.  
Water bottle stations Quantity: number of stations = 37
Description: 35 full depth CTD stations were completed and 2 repeat shallows stations for biogeochemical sampling only. The full depth stations included a test station, the 30 stations for the SR1b Drake Passage repeat section and three repeat stations south of Burdwood Bank to collect LADCP data (no bottles were taken on these).  
Geology and geophysics  
Multi-beam echosounding Quantity: activity duration in days = 19
Description: Echo-sounder data from the JCR's EA600 and EM120 were collected.  
Single-beam echosounding Quantity: activity duration in days = 19
Description: Echo-sounder data from the JCR's EA600 and EM120 were collected.  

Cruise Inventory Mooring/Buoy Operations

Latitude Longitude Data type Description
60° 40' S 54° 28' W Neutrally buoyant floats Argo PROVOR float launched. Argo ID 5F74300.
59° 0' S 55° 51' W Neutrally buoyant floats Argo PROVOR float launched. Argo ID 64AF800.
60° 51' S 54° 42' W Sea level (inc. bot. press., inverted echosounder) bottom pressure recorder and inverted echo sounder. Deployed Dec 2002, recovered 2004. Drake South.
60° 51' S 54° 42' W Sea level (inc. bot. press., inverted echosounder) bottom pressure recorder and inverted echo sounder. Deployed Dec 2004. Drake South
58° 22' S 56° 15' W Sea level (inc. bot. press., inverted echosounder) bottom pressure recorder deployed Dec 2004. Drake Middle
55° 3' S 58° 18' W Sea level (inc. bot. press., inverted echosounder) bottom pressure recorder deployed Dec 2004. Trial deployment of Rapid Lander
54° 56' S 58° 21' W Sea level (inc. bot. press., inverted echosounder) bottom pressure recorder deployed Nov 2003, recovered Dec 2004. Drake North
54° 56' S 58° 21' W Sea level (inc. bot. press., inverted echosounder) bottom pressure recorder deployed Nov 2004. Drake North

Summary of BODC Data Holdings for the Cruise

National Oceanographic Database

Summary

# Series Instrument Description Parameters
35 CTD/STD cast Density of the water column
Electrical conductivity of the water column
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  
739174 CTD/STD cast 2004-12-02 23:21Z 53° 20' S, 58° 8' W Click for more
739186 CTD/STD cast 2004-12-03 07:37Z 54° 40' S, 58° 32' W Click for more
739198 CTD/STD cast 2004-12-03 09:53Z 54° 55' S, 58° 22' W Click for more
739205 CTD/STD cast 2004-12-03 10:55Z 54° 56' S, 58° 22' W Click for more
739217 CTD/STD cast 2004-12-03 15:50Z 54° 57' S, 58° 21' W Click for more
739229 CTD/STD cast 2004-12-03 18:42Z 55° 4' S, 58° 17' W Click for more
739230 CTD/STD cast 2004-12-03 23:10Z 55° 7' S, 58° 15' W Click for more
739242 CTD/STD cast 2004-12-04 01:54Z 55° 10' S, 58° 13' W Click for more
739254 CTD/STD cast 2004-12-04 04:31Z 55° 13' S, 58° 12' W Click for more
739266 CTD/STD cast 2004-12-04 08:47Z 55° 31' S, 58° 1' W Click for more
739278 CTD/STD cast 2004-12-04 13:22Z 55° 49' S, 57° 48' W Click for more
739291 CTD/STD cast 2004-12-04 18:23Z 56° 9' S, 57° 37' W Click for more
739309 CTD/STD cast 2004-12-04 22:39Z 56° 28' S, 57° 25' W Click for more
739310 CTD/STD cast 2004-12-05 03:24Z 56° 46' S, 57° 13' W Click for more
739322 CTD/STD cast 2004-12-05 07:32Z 57° 6' S, 57° 1' W Click for more
739334 CTD/STD cast 2004-12-05 12:19Z 57° 24' S, 56° 50' W Click for more
739346 CTD/STD cast 2004-12-05 17:53Z 57° 43' S, 56° 38' W Click for more
739358 CTD/STD cast 2004-12-05 22:03Z 58° 3' S, 56° 27' W Click for more
739371 CTD/STD cast 2004-12-06 04:12Z 58° 22' S, 56° 15' W Click for more
739383 CTD/STD cast 2004-12-06 08:24Z 58° 40' S, 56° 3' W Click for more
739395 CTD/STD cast 2004-12-06 12:28Z 59° 0' S, 55° 51' W Click for more
739402 CTD/STD cast 2004-12-06 17:58Z 59° 19' S, 55° 39' W Click for more
739414 CTD/STD cast 2004-12-06 22:25Z 59° 40' S, 55° 27' W Click for more
739426 CTD/STD cast 2004-12-07 02:56Z 60° 0' S, 55° 13' W Click for more
739438 CTD/STD cast 2004-12-07 07:13Z 60° 19' S, 55° 1' W Click for more
739451 CTD/STD cast 2004-12-07 11:38Z 60° 40' S, 54° 49' W Click for more
739463 CTD/STD cast 2004-12-07 17:55Z 60° 48' S, 54° 44' W Click for more
739475 CTD/STD cast 2004-12-07 20:26Z 60° 49' S, 54° 43' W Click for more
739487 CTD/STD cast 2004-12-07 22:09Z 60° 51' S, 54° 42' W Click for more
739499 CTD/STD cast 2004-12-08 00:07Z 60° 58' S, 54° 37' W Click for more
739506 CTD/STD cast 2004-12-08 01:29Z 61° 3' S, 54° 35' W Click for more
739518 CTD/STD cast 2004-12-13 16:36Z 68° 1' S, 70° 26' W Click for more
739531 CTD/STD cast 2004-12-18 11:46Z 54° 56' S, 58° 22' W Click for more
739543 CTD/STD cast 2004-12-18 14:01Z 54° 55' S, 58° 22' W Click for more
739555 CTD/STD cast 2004-12-18 16:08Z 54° 40' S, 58° 32' W Click for more

Project Database

No data currently held for this cruise in the BODC Project Database

References

Track Charts

Track Chart

Track Chart

Reports

Cruise Report

Cruise Report