RRS James Clark Ross JR20140308 (JR293 Leg1, JR299 Leg1, UKD-5)

Cruise summary report

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Cruise Info.

Ship name (ship code)

RRS James Clark Ross (74JC)

Cruise identifier

JR20140308 (JR293 Leg1, JR299 Leg1, UKD-5)

Cruise period

2014-03-08 — 2014-03-29

Status

Completed

Port of departure

Rothera, Antarctica

Port of return

Punta Arenas, Chile

Purpose

Research

Objectives

The voyage JR299 on the RRS James Clark Ross was an amalgamation of the following cruises: JR293, JR272C and JR273B. It also included a three day extension in which to turn around two Lamont-Doherty Earth Observatory (LDEO) moorings in the Weddell Sea. JR299 also represents the final voyage of the Diapycnal and Isopycnal Mixing Experiment in the Southern Ocean (DIMES) project that began in 2009. The major field work component of DIMES consisting of five voyages by US collaborators and five (and a half) UK led voyages investigating the spread of a chemical tracer dye release through Drake Passage and other observations of internal ocean mixing in the South East Pacific and Scotia Sea. Because of this JR299 is also designated DIMES UK5.

Due to logistical constraints the cruise was split into two parts. The first was a leg from the BAS Rothera base on Adelaide Island on the Antarctic Peninsula that departed on the 9th of March and proceeded north along the coastline, undertook a CTD and VMP transect of SR1b (JR293) across Drake Passage from Elephant Island to Burdwood Bank, and finished at Punta Arenas on the 24th of March. Personnel disembarked here, notably all those associated with the VMP, and the ship resupplied and refuelled.

SR1 Transect - Drake Passage Repeat Hydrography (JR293): 30 stations across Drake Passage from Elephant Island to Burdwood Bank at the same positions as occupied in previous cruises (15 of the last 18 seasons). Increased to 34 stations to achieve high resolution sampling across the SAF/PF. The VMP and tethered VMP and technicians were only available for this part of the cruise.

Chief scientist

Andrew J S Meijers (British Antarctic Survey)

Project

Diapycnal and Isopycnal Mixing Experiment in the Southern Ocean

Coordinating body

Natural Environment Research Council (NERC)

Cruise report

(6.24 MB)

Ocean/sea areas

General

South West Atlantic Ocean (limit 20W)
Southern Ocean

Specific

Drake Passage, Weddell Sea, Scotia Sea, Argentine Basin

Track charts

(0.18 MB)

Measurements

Physical oceanography

Surface measurements underway (T,S)

Quantity: track kilometres = 9650
Description: Underway ocean measurements

Surface measurements underway (T,S)

Quantity: track kilometres = 9650
Description: Underway water sampling (surface salinity, every ~4 hours when underway)

Water bottle stations

Quantity: number of stations = 118
Description: CTD casts. Continuous recordings Conductivity, temperature, depth, fluorescence, PAR, transmittance. NB - 119 casts were done, one had a problem and no water sampling was done.

CTD stations

Geochemical tracers (eg freons)

Quantity: number of stations = 52
Description: CTD water analysis - CFCs/SF6 Sampled through water column.

Geochemical tracers (eg freons)

Quantity: number of stations = 81
Description: CTD water analysis - DIMES Tracer trifluoromethyl sulfurpentafloride. Sampled through water column, targeting density horizons.

Current profiler (eg ADCP)

Quantity: number of stations = 119
Description: Lowered Acoustic Doppler Current Profiler mounted on CTD frame.

Current profiler (eg ADCP)

Quantity: track kilometres = 9650
Description: Ship mounted Acoustic Doppler Current Profiler measurements (75 kHz)

Surface drifters/drifting buoys

Quantity: number of deployments = 16
Description: Surface drifters. 6 at high temporal resolution (GPS fix every ~15 minutes), 10 at lower (GPS fix every 2-4 hours). Deployed in 2 arrays. Array 1: -53.25902 S, -45.15368 W to -52.89154 S, -45.51824 W. Array 2: -53.42095 S, -50.21683 W to -53.20238 S, -50.01525 W

Neutrally buoyant floats

Quantity: number of deployments = 8
Description: ARGO floats. Deployed between -52.99198 S, -47.50283 W and -53.29919 S, -48.92516 W.

Other physical oceanographic measurements

Quantity: number of stations = 21
Description: VMP & TVMP Vertical microstructure profiles, free-falling and tethered.

Chemical oceanography

Oxygen

Quantity: number of stations = 3
Description: d18O

Oxygen

Quantity: number of stations = 6
Description: CTD water analysis - Dissolved oxygen. Sampled through water column.

Carbon dioxide

Quantity: number of stations = 48
Description: CTD water analysis - Dissolved inorganic carbon. Sampled through water column.

Nitrate

Quantity: number of stations = 50
Description: CTD water analysis - Nitrate/slicate/Total alkalinity/PH. Sampled through water column.

Silicate

Quantity: number of stations = 50
Description: CTD water analysis - Nitrate/slicate/Total alkalinity/PH. Sampled through water column.

Alkalinity

Quantity: number of stations = 50
Description: CTD water analysis - Nitrate/slicate/Total alkalinity/PH. Sampled through water column.

Trace elements

Quantity: number of stations = 48
Description: CTD water analysis - Barium. Sampled through water column.

Isotopes

Quantity: number of stations = 3
Description: d18O

Other chemical oceanographic measurements

Quantity: number of stations = 116
Description: CTD water analysis - Salinity. Sampled through water column.

Meteorology

Routine standard measurements

Quantity: track kilometres = 9650
Description: Underway meterological measurements

Geology and geophysics

Single-beam echosounding

Quantity: track kilometres = 9650
Description: EA600 depth data

Multi-beam echosounding

Quantity: track kilometres = 9650
Description: EM122 swath bathymetry data

Moorings, landers, buoys

Physical oceanography

Current profiler (eg ADCP)

63° 30' 59" S 41° 45' 59" W — Deployment position: -63.52259 S -41.76834 W LDEO Mooring M3b Deployment In addition communication was made with LDEO Mooring M3 that was deployed during JR252 in 2011. It was not possible to recover this mooring due to sea-ice cover.

Current profiler (eg ADCP)

62° 36' 0" S 43° 13' 59" W — Recovery position: -62.61782 S -43.24113 LDEO Mooring M2 Recovery. Mooring had been deployed on JR252 in 2011 with the triangulated position: 62 36.924' S 043 14.618' W

Other physical oceanographic measurements

Data held at BODC

Get data

Series/Profiles

31 Acoustic doppler current profiler

Reference numbers
Vertical spatial coordinates
Horizontal velocity of the water column (currents)
Metadata parameters

[Show series]

Reference numbers
Vertical spatial coordinates
Horizontal velocity of the water column (currents)
Metadata parameters

[Hide series]

BODC id	Date/Time	Location
1919308	2014-03-18 15:01:34	55° 40' 29" S 57° 54' 24" W
1919056	2014-03-13 17:06:30	60° 58' 56" S 54° 37' 44" W
1919100	2014-03-14 04:50:34	60° 40' 1" S 54° 49' 28" W
1919148	2014-03-15 04:23:01	59° 19' 59" S 55° 38' 52" W
1919136	2014-03-14 21:39:30	59° 40' 1" S 55° 26' 41" W
1919241	2014-03-17 03:35:47	56° 47' 2" S 57° 13' 48" W
1919357	2014-03-19 12:18:02	55° 10' 17" S 57° 59' 49" W
1919333	2014-03-19 01:48:47	55° 22' 5" S 57° 59' 57" W
1919161	2014-03-15 10:18:31	59° 0' 0" S 55° 51' 21" W
1919253	2014-03-17 17:55:16	56° 27' 57" S 57° 25' 25" W
1919289	2014-03-18 05:41:33	55° 59' 35" S 57° 42' 53" W
1919032	2014-03-12 19:47:25	62° 45' 54" S 59° 6' 34" W
1919216	2014-03-16 16:39:14	57° 24' 51" S 56° 50' 24" W
1919277	2014-03-18 01:30:44	56° 9' 5" S 57° 37' 5" W
1919020	2014-03-12 17:08:57	62° 45' 55" S 59° 6' 34" W
1919068	2014-03-13 19:32:17	60° 50' 59" S 54° 42' 46" W
1919345	2014-03-19 07:30:07	55° 12' 51" S 57° 59' 58" W
1919093	2014-03-14 00:52:07	60° 48' 1" S 54° 44' 17" W
1919228	2014-03-16 21:53:15	57° 6' 0" S 57° 2' 8" W
1919081	2014-03-13 22:06:01	60° 49' 59" S 54° 43' 18" W
1919112	2014-03-14 10:42:15	60° 19' 57" S 55° 1' 54" W
1919124	2014-03-14 16:22:07	59° 59' 51" S 55° 14' 26" W
1919173	2014-03-15 15:46:23	58° 40' 59" S 56° 3' 20" W
1919204	2014-03-16 10:47:46	57° 44' 0" S 56° 38' 24" W
1919321	2014-03-18 20:36	55° 31' 6" S 57° 59' 56" W
1919044	2014-03-13 15:28:12	61° 2' 55" S 54° 35' 18" W
1919197	2014-03-16 04:33:53	58° 2' 56" S 56° 26' 54" W
1919265	2014-03-17 21:41:08	56° 18' 29" S 57° 31' 26" W
1919290	2014-03-18 10:18:14	55° 49' 58" S 57° 49' 5" W
1919185	2014-03-15 22:03:08	58° 22' 0" S 56° 15' 0" W
1919369	2014-03-19 16:28:06	55° 7' 16" S 57° 59' 57" W

31 CTD/STD cast

Transmittance and attenuance of the water column
Salinity of the water column
Temperature of the water column
Vertical spatial coordinates
Dissolved oxygen parameters in the water column
Visible waveband radiance and irradiance measurements in the water column
Density of the water column
Electrical conductivity of the water column
Chlorophyll pigment concentrations in water bodies

[Show series]

[Hide series]

BODC id	Date/Time	Location
1812241	2014-03-13 15:27:55	61° 2' 55" S 54° 35' 16" W
1812289	2014-03-14 00:52:09	60° 48' 1" S 54° 44' 18" W
1812333	2014-03-14 21:39:18	59° 40' 1" S 55° 26' 38" W
1812413	2014-03-16 21:53:19	57° 6' 1" S 57° 2' 8" W
1812345	2014-03-15 04:22:43	59° 19' 56" S 55° 38' 42" W
1812394	2014-03-16 10:47:26	57° 43' 57" S 56° 38' 4" W
1812216	2014-03-12 17:08:32	62° 45' 55" S 59° 6' 34" W
1812253	2014-03-13 17:06:11	60° 58' 56" S 54° 37' 44" W
1812277	2014-03-13 22:05:45	60° 49' 59" S 54° 43' 18" W
1812308	2014-03-14 10:42:10	60° 19' 46" S 55° 1' 53" W
1812474	2014-03-18 10:18:23	55° 49' 3" S 57° 46' 56" W
1812290	2014-03-14 04:50:29	60° 39' 49" S 54° 49' 6" W
1812369	2014-03-15 15:46:02	58° 41' 2" S 56° 3' 23" W
1812228	2014-03-12 19:47:14	62° 45' 54" S 59° 6' 34" W
1812265	2014-03-13 19:32:05	60° 50' 59" S 54° 42' 46" W
1812425	2014-03-17 03:35:38	56° 46' 58" S 57° 13' 54" W
1812437	2014-03-17 17:55:13	56° 28' 2" S 57° 25' 28" W
1812462	2014-03-18 05:41:35	55° 58' 59" S 57° 39' 38" W
1812486	2014-03-18 15:01:31	55° 40' 0" S 57° 53' 8" W
1812530	2014-03-19 16:27:51	55° 7' 14" S 57° 59' 58" W
1812382	2014-03-16 04:33:46	58° 3' 0" S 56° 26' 47" W
1812449	2014-03-17 21:40:52	56° 18' 15" S 57° 30' 1" W
1812498	2014-03-18 20:35:55	55° 31' 8" S 57° 59' 59" W
1812529	2014-03-19 12:17:51	55° 10' 17" S 57° 59' 51" W
1812357	2014-03-15 10:18:27	59° 0' 0" S 55° 51' 20" W
1812505	2014-03-19 01:48:37	55° 22' 5" S 57° 59' 57" W
1812517	2014-03-19 07:29:55	55° 12' 51" S 57° 59' 58" W
1812321	2014-03-14 16:21:53	59° 59' 50" S 55° 14' 28" W
1812370	2014-03-15 22:03:01	58° 22' 0" S 56° 15' 0" W
1812401	2014-03-16 16:39:12	57° 24' 47" S 56° 50' 20" W
1812450	2014-03-18 01:30:38	56° 8' 43" S 57° 34' 3" W

21 Turbulence energy dissipation probe

Reference numbers
Turbulence in the water column
Salinity of the water column
Temperature of the water column
Vertical spatial coordinates

[Show series]

Reference numbers
Turbulence in the water column
Salinity of the water column
Temperature of the water column
Vertical spatial coordinates

[Hide series]

BODC id	Date/Time	Location
1734235	2014-03-15 04:04 — 2014-03-15 07:50	59° 19' 59" S 55° 38' 52" W
1734247	2014-03-15 15:31 — 2014-03-15 19:20	58° 40' 59" S 56° 3' 20" W
1734339	2014-03-18 23:27 — 2014-03-19 00:25	55° 31' 8" S 57° 59' 59" W
1734407	2014-03-13 23:23 — 2014-03-14 00:07	60° 49' 59" S 54° 43' 18" W
1734211	2014-03-12 18:51 — 2014-03-12 19:05	62° 45' 55" S 59° 6' 34" W
1734259	2014-03-15 21:53 — 2014-03-16 02:05	58° 22' 0" S 56° 15' 0" W
1734272	2014-03-16 16:28 — 2014-03-16 19:33	57° 24' 51" S 56° 50' 24" W
1734223	2014-03-14 21:29 — 2014-03-15 01:25	59° 40' 1" S 55° 26' 43" W
1734260	2014-03-16 10:28 — 2014-03-16 14:02	57° 44' 1" S 56° 38' 26" W
1734340	2014-03-19 05:03 — 2014-03-19 06:04	55° 22' 5" S 57° 59' 57" W
1734352	2014-03-19 10:36 — 2014-03-19 11:38	55° 12' 51" S 57° 59' 58" W
1734376	2014-03-13 17:10 — 2014-03-13 18:11	60° 58' 56" S 54° 37' 44" W
1734388	2014-03-13 19:50 — 2014-03-13 20:55	60° 50' 59" S 54° 42' 46" W
1734420	2014-03-14 10:23 — 2014-03-14 13:47	60° 19' 57" S 55° 1' 54" W
1734284	2014-03-12 20:45 — 2014-03-12 22:13	62° 45' 54" S 59° 6' 34" W
1734364	2014-03-19 14:43 — 2014-03-19 15:43	55° 10' 23" S 57° 59' 41" W
1734296	2014-03-17 03:17 — 2014-03-17 06:42	56° 47' 2" S 57° 13' 47" W
1734315	2014-03-17 09:58 — 2014-03-17 16:29	56° 37' 30" S 57° 19' 39" W
1734327	2014-03-18 18:21 — 2014-03-18 19:04	55° 39' 58" S 57° 51' 17" W
1734303	2014-03-17 07:36 — 2014-03-17 09:03	56° 42' 15" S 57° 16' 44" W
1734419	2014-03-14 04:37 — 2014-03-14 07:53	60° 40' 1" S 54° 49' 28" W

Discrete samples

32 CTD frame plus rosette sampler

Total dissolved inorganic carbon (TCO2) concentration in the water column
Phosphate concentration parameters in the water column
Salinity of the water column
Water body released tracers
Silicate concentration parameters in the water column
Metadata parameters
Nitrate concentration parameters in the water column
Alkalinity, acidity and pH of the water column

Resources

RRS James Clark Ross JR20140308 (JR293 Leg1, JR299 Leg1, UKD-5)

Cruise summary report

Quick links

BODC holdings

EDMED