Resources

Sonne SO238

Cruise summary report

Cruise Info. 
Ship name (ship code)Sonne (06SN)
Cruise identifierSO238
Cruise period2015-02-06 — 2015-03-06
StatusCompleted
Port of departureBalboa, Panama
Port of returnBalboa, Panama
PurposeResearch
ObjectivesThe cooling of young oceanic crust is the main physical process responsible for removing heat from the solid Earth to the hydrosphere. Close to the mid-ocean ridges, rapid cooling is dominated by hydrothermal circulation of seawater through the porous and fractured basalt crust. This hydrothermal fluid is then discharged into the ocean mainly along the ridges. The cruise SO238 is part of an interdisciplinary project to investigate the effects of this heat loss and hydrothermal circulation in both the solid Earth and the ocean. The data collected during the cruise will allow us to derive an integrated model which will be constrained by geophysical, geological and physical oceanography data that includes pathways in both the solid Earth and the ocean including fluxes through the seabed.

The cruise was divided into three stages. During the first part of the cruise, a 2-ship synthetic aperture multichannel seismic reflection survey over three 270-km transects was carried out to map the evolution of crust structure, properties and morphology along the southern flank of the Costa Rica Ridge. The lead ship for this work was RRS James Cook, with FS Sonne trailing 9 km behind. In the second part of the cruise, we recovered a line of three moorings equipped with current meters, CTD (Conductivity, Temperature, Depth) sensors, bottom pressure recorders (BPRs) and 12 magnetotelluric landers that were deployed in December 2014 from RRS James Cook (cruise JC112). In the final part of the cruise, we deployed an ADCP mooring for 24 hours to monitor flows across the Ecuador Trench, southeast of the Costa Rica Ridge and, subsequently, carried out a series of ~40 CTDs in the eastern half of the Panama Basin.Swath bathymetry was collected throughout the cruise.
Chief scientistMiguel Angel Morales Maqueda (National Oceanography Centre, Liverpool)
ProjectOSCAR
Coordinating bodyNatural Environment Research Council (NERC)
Cruise reportSonne SO238 cruise report sonne_so238.pdf (7.99 MB) 
Ocean/sea areas 
GeneralNorth East Pacific Ocean (limit 180W)
SpecificPanama Basin
Track chartsSonne SO238 cruise track — sonne_so238trk.pdf (0.13 MB) 
Measurements 
Physical oceanography 
Surface measurements underway (T,S)Quantity: number of samples = 24
Description: Surface T & S. Continuous measurement + daily salinity samples (1 bottle)
CTD stationsQuantity: number of stations = 43
Description: CTD + Oxygen + Turbidity + Sound speed + salinity sampling (24 bt) + sporadic He sampling
Geochemical tracers (eg freons)Quantity: number of stations = 43
Description: CTD + Oxygen + Turbidity + Sound speed + salinity sampling (24 bt) + sporadic He sampling
Current profiler (eg ADCP)Quantity: activity duration in days = 24
Description: Continuous measurement with hull mounted ADCP (raw data)
Instrumented wave measurementsQuantity: activity duration in days = 24
Description: Continuous measurement with WAMOS system (raw data)
Other physical oceanographic measurementsQuantity: activity duration in days = 24
Description: Water column acoustic profiling with Parasound sub-bottom profiler system
Meteorology 
Routine standard measurementsQuantity: activity duration in days = 24
Description: Routine air T, Q, W, insolation
Geology and geophysics 
Multi-beam echosoundingQuantity: activity duration in days = 24
Description: Continuous swath echosounding save during mooring and CTD stations, and seismics
Multichannel seismic reflectionQuantity: number of profiles = 3
Description: Synthetic aperture multichannel seismic reflection with James Cook.
Moorings, landers, buoys 
Physical oceanography 
Current profiler (eg ADCP)0° 19' 0" S  81° 7' 59" W — Bottom mounted ADCP with CTD ADCP-Ecuador Trench
Current profiler (eg ADCP)1° 0' 0" S  85° 16' 59" W — Bottom mounted ADCP with CTD ADCP-West
Current profiler (eg ADCP)1° 0' 0" S  86° 0' 0" W — Bottom mounted ADCP with CTD ADCP-East
Sea level (inc. bot. press., inverted echosounder)2° 1' 0" N  83° 40' 59" W — Bottom pressure recorder
Other physical oceanographic measurements2° 0' 0" N  83° 42' 0" W — Combined CTD (5) and point current meters (3) M2
Other physical oceanographic measurements3° 19' 59" N  83° 32' 59" W — Combined CTD (5), point current meters (3) and bottom pressure (1) M1
Other physical oceanographic measurements0° 52' 59" N  83° 46' 59" W — Combined CTD (5), point current meters (3) and bottom pressure (1) M3
Geology and geophysics 
Magnetic measurements2° 22' 59" N  83° 49' 0" W — Magnetotelluric lander MT04
Magnetic measurements1° 57' 0" N  83° 43' 59" W — Magnetotelluric lander MT03
Magnetic measurements1° 19' 59" N  83° 43' 59" W — Magnetotelluric lander MT02
Magnetic measurements1° 16' 0" N  83° 45' 0" W — Magnetotelluric lander MT01
Magnetic measurements2° 46' 0" N  83° 49' 59" W — Magnetotelluric lander MT05
Magnetic measurements3° 1' 0" N  83° 49' 0" W — Magnetotelluric lander MT06
Magnetic measurements3° 4' 0" N  83° 49' 0" W — Magnetotelluric lander MT07 not recovered
Magnetic measurements3° 17' 59" N  83° 49' 59" W — Magnetotelluric lander MT09
Magnetic measurements3° 25' 0" N  83° 50' 59" W — Magnetotelluric lander MT11
Magnetic measurements3° 21' 0" N  83° 49' 59" W — Magnetotelluric lander MT10
Magnetic measurements3° 25' 0" N  83° 50' 59" W — Magnetotelluric lander MT12
Magnetic measurements3° 4' 59" N  83° 49' 59" W — Magnetotelluric lander MT08
Data held at BODC Get data
Series/Profiles 
5  Bottle station
Reference numbers
Vertical spatial coordinates
Stable isotopes in water bodies
Quality control flags
Reference numbers
Vertical spatial coordinates
Stable isotopes in water bodies
Quality control flags

BODC idDate/TimeLocationDoc.
21530882015-02-19 22:23:25 0° 35' 10" S  85° 30' 10" W  View metadata report for BODC series reference number 2153088
21531202015-02-27 08:46:03 3° 14' 43" N  79° 54' 38" W  View metadata report for BODC series reference number 2153120
21531192015-02-25 01:04:59 0° 59' 58" N  82° 0' 0" W  View metadata report for BODC series reference number 2153119
21530762015-02-19 03:25:38 0° 6' 36" S  84° 55' 41" W  View metadata report for BODC series reference number 2153076
21531072015-02-21 21:20:43 0° 18' 24" S  81° 8' 13" W  View metadata report for BODC series reference number 2153107
44  CTD/STD cast
Reference numbers
Sound velocity and travel time in the water column
Dissolved oxygen parameters in the water column
Temperature of the water column
Vertical spatial coordinates
Salinity of the water column
Concentration of suspended particulate material in the water column
Density of the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies
Reference numbers
Sound velocity and travel time in the water column
Dissolved oxygen parameters in the water column
Temperature of the water column
Vertical spatial coordinates
Salinity of the water column
Concentration of suspended particulate material in the water column
Density of the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies

BODC idDate/TimeLocationDoc.
20415722015-02-22 02:08:04 0° 19' 37" S  81° 0' 33" W  View metadata report for BODC series reference number 2041572
20416392015-02-23 12:13:39 2° 29' 59" S  81° 59' 59" W  View metadata report for BODC series reference number 2041639
20416522015-02-24 00:39:54 1° 30' 0" S  82° 0' 0" W  View metadata report for BODC series reference number 2041652
20417322015-02-26 01:43:48 1° 0' 41" N  80° 43' 18" W  View metadata report for BODC series reference number 2041732
20418972015-03-02 04:18:20 5° 21' 57" N  81° 16' 1" W  View metadata report for BODC series reference number 2041897
20415472015-02-19 22:23:25 0° 35' 10" S  85° 30' 10" W  View metadata report for BODC series reference number 2041547
20417932015-02-27 17:21:19 2° 37' 54" N  79° 42' 32" W  View metadata report for BODC series reference number 2041793
20418122015-02-28 07:58:18 3° 42' 58" N  79° 39' 58" W  View metadata report for BODC series reference number 2041812
20414922015-02-16 02:19:18 3° 21' 40" N  83° 34' 41" W  View metadata report for BODC series reference number 2041492
20415112015-02-17 20:34:16 2° 0' 11" N  83° 41' 26" W  View metadata report for BODC series reference number 2041511
20415842015-02-22 04:49:46 0° 11' 13" S  81° 8' 17" W  View metadata report for BODC series reference number 2041584
20416272015-02-23 06:09:52 2° 59' 56" S  81° 59' 55" W  View metadata report for BODC series reference number 2041627
20416402015-02-23 18:33:26 1° 59' 55" S  82° 0' 4" W  View metadata report for BODC series reference number 2041640
20416642015-02-24 05:08:56 0° 59' 59" S  82° 0' 1" W  View metadata report for BODC series reference number 2041664
20416762015-02-24 09:45 0° 30' 0" S  82° 0' 0" W  View metadata report for BODC series reference number 2041676
20419042015-03-02 15:05:05 4° 23' 59" N  81° 56' 1" W  View metadata report for BODC series reference number 2041904
20414802015-02-15 20:40:41 3° 42' 18" N  83° 48' 18" W  View metadata report for BODC series reference number 2041480
20415232015-02-18 19:20:36 0° 23' 51" N  84° 20' 55" W  View metadata report for BODC series reference number 2041523
20415592015-02-20 21:46:35 1° 37' 23" S  81° 27' 10" W  View metadata report for BODC series reference number 2041559
20416882015-02-24 13:48:28 0° 0' 1" N  82° 0' 1" W  View metadata report for BODC series reference number 2041688
20417072015-02-24 18:36:20 0° 29' 59" N  81° 59' 58" W  View metadata report for BODC series reference number 2041707
20417682015-02-27 00:28:08 2° 49' 31" N  80° 8' 19" W  View metadata report for BODC series reference number 2041768
20417812015-02-27 08:46:03 3° 14' 43" N  79° 54' 38" W  View metadata report for BODC series reference number 2041781
20414792015-02-10 01:18:24 1° 31' 31" N  83° 17' 10" W  View metadata report for BODC series reference number 2041479
20415602015-02-21 05:43:20 0° 58' 18" S  81° 20' 54" W  View metadata report for BODC series reference number 2041560
20417192015-02-25 01:04:59 0° 59' 58" N  82° 0' 0" W  View metadata report for BODC series reference number 2041719
20417442015-02-26 09:14:32 1° 44' 58" N  80° 33' 58" W  View metadata report for BODC series reference number 2041744
20418612015-03-01 10:36:06 5° 4' 58" N  80° 20' 1" W  View metadata report for BODC series reference number 2041861
20414672015-02-08 23:07:45 6° 16' 8" N  80° 25' 36" W  View metadata report for BODC series reference number 2041467
20415352015-02-19 03:25:38 0° 6' 36" S  84° 55' 41" W  View metadata report for BODC series reference number 2041535
20415962015-02-22 08:44:09 0° 19' 32" S  81° 17' 17" W  View metadata report for BODC series reference number 2041596
20416032015-02-22 12:03:31 0° 27' 15" S  81° 8' 38" W  View metadata report for BODC series reference number 2041603
20417202015-02-25 17:11:02 0° 15' 46" N  80° 53' 2" W  View metadata report for BODC series reference number 2041720
20419162015-03-03 07:40:05 5° 21' 49" N  80° 10' 4" W  View metadata report for BODC series reference number 2041916
20419282015-03-03 17:15:04 6° 19' 20" N  79° 56' 25" W  View metadata report for BODC series reference number 2041928
20419412015-03-03 23:28:15 6° 59' 32" N  79° 56' 22" W  View metadata report for BODC series reference number 2041941
20417562015-02-26 16:50:01 2° 19' 55" N  80° 21' 58" W  View metadata report for BODC series reference number 2041756
20418002015-02-27 23:28:10 2° 25' 27" N  79° 6' 57" W  View metadata report for BODC series reference number 2041800
20418242015-02-28 13:23:09 3° 56' 57" N  79° 31' 59" W  View metadata report for BODC series reference number 2041824
20418482015-03-01 04:06:47 4° 41' 59" N  79° 50' 23" W  View metadata report for BODC series reference number 2041848
20418732015-03-01 17:47:25 4° 56' 56" N  81° 0' 0" W  View metadata report for BODC series reference number 2041873
20418852015-03-01 23:14:21 5° 4' 56" N  81° 11' 57" W  View metadata report for BODC series reference number 2041885
20416152015-02-21 21:20:43 0° 18' 24" S  81° 8' 13" W  View metadata report for BODC series reference number 2041615
20418362015-02-28 18:45:22 4° 15' 13" N  79° 2' 30" W  View metadata report for BODC series reference number 2041836
Discrete samples 
44  CTD frame plus rosette sampler