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RV Ronald H. Brown Cruise RB0701, 21 Mar-10 Apr 2007. RAPID mooring cruise report

By M.O. Baringer and T. Kanzow

Abstract

This report describes the mooring operations conducted during RV Ronald H. Brown Cruise RB0701 conducted<br/>between 21 March 2007 and 10 April 2007.<br/>These mooring operations were completed as part of the United Kingdom Natural Environment Research Council<br/>(NERC) funded RAPID Programme to monitor the Atlantic Meridional Overturning Circulation at 26.5ºN. The<br/>primary purpose of this cruise was to service the Western Boundary section of the 26.5ºN mooring array first<br/>deployed in 2004 during RRS Discovery cruises D277 and D278 (SOC cruise report number 53), and serviced in<br/>2005 during RRS Charles Darwin Cruise CD170 and RV Knorr Cruise KN182-2 (NOCS cruise report number 2),<br/>RRS Charles Darwin Cruise CD177 (NOCS cruise report number 5), and in 2006 on RV Ronald H. Brown Cruise<br/>RB0602, RRS Discovery Cruise D304 (NOCS cruise report number 16) and FS Poseidon Cruises P343 and P345<br/>(NOCS cruise report number 28).<br/>Cruise RB0701 was from Charleston, SC to San Juan, Puerto Rico, and covered the Western Boundary moorings<br/>deployed on RB0602 (along with two landers deployed on KN182-2). This cruise is the third annual refurbishment<br/>of the Western Boundary section of an array of moorings deployed across the Atlantic in order to set up a preoperational<br/>prototype system to continuously observe the Atlantic Meridional Overturning Circulation (MOC).<br/>This array will be further refined and refurbished during subsequent years.<br/>The instrumentation deployed on the array consists of a variety of current meters, bottom pressure recorders, CTD<br/>loggers and Inverted Echosounders, which, combined with time series measurements of the Florida Channel<br/>Current and wind stress estimates, will be used to determine the strength and structure of the MOC at 26.5ºN.<br/>(http://www.noc.soton.ac.uk/rapidmoc

Topics: GC
Publisher: National Oceanography Centre Southampton
Year: 2008
OAI identifier: oai:eprints.soton.ac.uk:51297
Provided by: e-Prints Soton

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Citations

  1. 08.643 at anchor down DAY Friday Triangulated latitude N 26.5378 Triangulated longitude W 76.1482
  2. (2006). 1) Two ARGOS beacons were deployed on NOAA research vessel Ron Brown, cruise 06 02, 23
  3. (2006). 2) Two Aanderaa RCM11 instruments were deployed on NOAA research vessel Ron Brown,
  4. (2006). 2) Two IXSEA/Oceano releases/transponders were deployed on NOAA research vessel Ron Brown, cruise 06 02, 23
  5. (2006). 3) Four Sontek Argonaut MD 1.5 MHZ instruments in non-inductive mode were deployed on NOAA research vessel
  6. (2006). 31.213 at anchor down DAY Thursday NOTE ALL TIMES RECORDED IN GMT COMMENCE TIME 17:46 Protocol taken by: Angela Hibbert COMPLETION TIME 17:57:32 at anchor down Depth at anchor down: 5437.8m uncorrected,
  7. 44.675 at anchor down DAY Thursday
  8. (2007). 6 1. Scientific Personnel doi
  9. (2007). A1 Appendix A: Additional Figures Figure A.1: Western Boundary Mooring Locations from
  10. (2007). A2 Figure A.2: Western Boundary Mooring Array as Deployed
  11. (2007). Aanderaa RCM11 – serial number 395 Pings per ensemble 600 Temperature range Low Rapid Mooring Cruise Report for RB0701 – March-April
  12. assembly time was ~5mins, but deployment was delayed by 30 mins as ship was found to be 0.6 nmi from station and had to steam to correct location.
  13. (2007). B10 Start date 05/04/07 Start time 16:00:00 Seabird SBE26 BPR – serial number 0392 Tide sample interval 30 minutes Tide measurements per wave burst 9999 Wave samples/burst 68 No. of 0.25s periods to integrate waves 33 Start date 05/04/07
  14. (2006). Both releases were checked pre-deployment by means of a CTD cast to 3500 metres. The releases were interrogated and sent commands to release at depth, and both responded on the first attempt. Mooring analysis & changes to configuration
  15. (2007). bottom pressure recorder, BPR, cruise RB0701
  16. (2007). C1 Appendix C: Details of Instruments Lowered on CTD Calibration Casts. Table C.1: Details of Instruments Lowered on CTD Calibration Casts Instrument details Cast Type Serial numbers Calibration type Microcat
  17. chain Float connected to swivel by polyester rope 16:08
  18. COMPLETION TIME 22:02:45 at anchor down Depth at anchor down 1395m uncorrected 1403m corrected ITEM SER NO COMMENT TIME Recovery line n/a
  19. (2007). DSU sn: unknown: 100m sn: 451, DSU sn: unknown: 3000m Rapid Mooring Cruise Report for RB0701 – March-April
  20. (2006). Emergency redeployment of EB1 and EB2 following problems on
  21. (2007). Estimated ascent rate ~84m/min Polyester rope connecting billings float to spheres was very tangled
  22. glass n/a Mooring rope entangled with rope connected to vessel
  23. (2007). Instrument type Manufacturer and model Total intended for recovery Total recovered Total lost Total deployed CTD Seabird SBE37
  24. (2007). Low power release, check unit 2. Only one release responded 3. 13:32 released 13:35 mooring spotted from bridge 13:56 line picked up 4. Pickup line almost broken Rapid Mooring Cruise Report for RB0701 – March-April
  25. (2007). National Oceanography Centre, Southampton, 60pp. (National Oceanography Centre Southampton Cruise Report, No. 29) ABSTRACT This report describes the mooring operations conducted during RV Ronald H.
  26. No reply from 369 Kevlar line coating perished between 1270m and 1370m
  27. Only SN322 worked. SN264 was not fired – due to mistakenly thinking it wasn’t on the cast. SN327 and 316 did not work. SN327, 316 and 264 were all tested on deck on the 28/3/2007 and all worked.
  28. Overnight on the 26/3/2007 three releases were wire tested down to 3500m, SN687 (861), 223 (661) and 253 (861). All of the releases worked fine
  29. Overnight on the 27/3/2007 four releases were wire tested to 5000m. The serial numbers were 327, 316, 322 and 264, all are 861 type releases.
  30. Overnight on the 29/3/2007 a wire test of releases was carried out with SN216 (861), 354 (861) and 327 (861, third attempt). This time only SN216 worked. As previous we tried the failures on deck and they worked fine. I believe that the LADCP was on.
  31. Overnight on the 30/3/2007, on a wire test to 4500m, SN354 and 327 were to be tried again along with SN251 and 248, all 861 units. All of the releases worked on deck. Only SN251 gave ranges and then confirmed it had released.
  32. (2007). Rapid Mooring Cruise Report for RB0701
  33. (2007). Rapid Mooring Cruise Report for RB0701 – March-April
  34. (2004). RB0701 is the thirteenth cruise on which staff from the NOC have completed mooring operations as part of the Rapid-MOC project (see table 4.1). The array was first deployed in Spring
  35. (2006). Recovery and redeployment of WB2 and US Western Boundary moorings, and WBTS hydrography section Appendix G in this report RB0701 RV Ronald H. Brown March -
  36. (2007). Seabird SBE37 SMP CTD – serial number 3220 Sample interval 1800 seconds Start date 28/03/07 Start time 13:00:00 Number of samples to average 1 Rapid Mooring Cruise Report for RB0701
  37. Seabird SBE37 SMP CTD – serial number 3223 Sample interval 1800 seconds Start date 28/03/07 Start time 13:00:00 Number of samples to average 1
  38. Seabird SBE37 SMP CTD – serial number 3228 Sample interval 1800 seconds Start date 30/03/07 Start time 20:30:00 Number of samples to average 1
  39. Seabird SBE37 SMP CTD – serial number 3230 Sample interval 1800 seconds Start date 30/03/07 Start time 20:00:00 Number of samples to average 1
  40. (2007). Seabird SBE37 SMP CTD – serial number 3231 Sample interval 1800 seconds Start date 30/03/07 Start time 20:30:00 Number of samples to average 1 Rapid Mooring Cruise Report for RB0701 – March-April
  41. Seabird SBE37 SMP CTD – serial number 3244 Sample interval 1800 seconds Start date 30/03/07 Start time 20:30:00 Number of samples to average 1
  42. Seabird SBE37 SMP CTD – serial number 3907 Sample interval 1800 seconds Start date 30/03/07 Start time 20:30:00 Number of samples to average 1
  43. Seabird SBE37 SMP CTD – serial number 5239 Sample interval 1800 seconds Start date 29/03/07 Start time 13:30:00 Number of samples to average 1
  44. Seabird SBE37 SMP CTD – serial number 5241 Sample interval 1800 seconds Start date 29/03/07 Start time 13:30:00 Number of samples to average 1
  45. (2007). Seabird SBE37 SMP CTD – serial number 5242 Sample interval 1800 seconds Start date 29/03/07 Start time 13:30:00 Number of samples to average 1 Rapid Mooring Cruise Report for RB0701 – March-April
  46. Seabird SBE37 SMP CTD – serial number 5245 Sample interval 1800 seconds Start date 29/03/07 Start time 13:30:00 Number of samples to average 1
  47. (2007). sn: 274, transmission ID 60202, attached to upper 24 inch diameter buoy 78m sn: 254, transmission ID 42746, attached to large 48 inch diameter buoy 207m Rapid Mooring Cruise Report for RB0701 – March-April
  48. sn: D203 2000m sn: D272 800m sn: D274 1200m sn: D298 3750m All the instruments were downloaded upon recovery, and the initial examination of the data showed similar file size, and minimal clock drift. Other instruments
  49. sound pulse) Protocol taken by: Tycho Huussen
  50. (2007). Table 1.1: Details of scientific personnel (non-ship staff) Name Affiliation Martha (Molly) Baringer NOAA-AOML Pedro Pena NOAA-AOML Carlos Fonseca CIMAS – University of Miami Andrew Stefanick NOAA-AOML Lisa Beal RSMAS –
  51. (2004). Table 4.1: Summary of previous RAPID-MOC cruises Cruise Vessel Date Objectives Cruise Report
  52. (2000). Table D.1: Instrument record lengths detailed by mooring Mooring Instrument Serial Number Approx depth (m) Recovered? Date of first useable record Date of last useable record WBADCP RDI Longranger
  53. (2004). The goal of RAPID-MOC is to develop a pre-operational array to monitor the Atlantic Meridional Overturning Circulation at 26.5°N (http://www.noc.soton.ac.uk/rapidmoc). The programme is funded to make four years of continuous observations between
  54. (2007). The plan is then to do 2 CTD casts with instrumentation on as well as 3 releases (for Rapid Mooring Cruise Report for RB0701 – March-April
  55. took a long time, because vessel failed to get hold of recovery line.
  56. (2006). WB2 instrument set-up 1) Sixteen Sea-Bird 37 SMP Microcats with full calibrations were received prior to the cruise, and all but three had new pressure sensors installed. The initial sensor configuration was as follows:
  57. (2007). We decided to leave on the frame the releases that had failed last night, SNs 354 and 327 (327 hasn’t worked on about three dips now). Rapid Mooring Cruise Report for RB0701
  58. (2007). We then concentrated on building the lander, WBL2, ready for deployment tomorrow. Rapid Mooring Cruise Report for RB0701 – March-April

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