RRS James Clark Ross JR15006

Cruise summary report

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Cruise Info.

Ship name (ship code)

RRS James Clark Ross (74JC)

Cruise identifier

JR15006

Cruise period

2016-03-31 — 2016-04-26

Status

Completed

Port of departure

Mare Harbour, Falkland Islands (Malvinas)

Port of return

Stanley, Falkland Islands (Malvinas)

Purpose

Research

Objectives

The voyage of the RRS James Clark Ross JR15006 consisted of the semi-annually repeated A23 hydrographic CTD section between the Weddell Sea and South Georgia, combined with the opportunistic request for 6 extra science days to take advantage of the newly installed oxygen isotope auto-analyser connected to the ship underway system. The goal of this extension was to collect 'end member' samples of oxygen isotopes from freshwater input to the region in order to attribute the freshwater component of underway observations to various percentage contributions from (for e.g.) sea ice melt, precipitation, glacial outflow etc. In addition oxygen isotopes were collected from CTDs on both A23 and in the vicinity of strong freshwater input, to establish the mixing between deep ocean interior values and local surface sources.

The voyage proceeded from Mare Harbour, Falkland Islands, immediately to Signy Island in the South Orkneys group. A day of ice/meltwater/shore water sample collection from and around MacLeod Glacier was undertaken, both by shore parties and small boats in front of the glacial terminus, before three CTDs were conducted away from the island. We then headed to the southern end of the A23 section and entered the advancing pack ice edge. Here we found a good example of multi-year sea ice and took ice core sections from it, as well as adjacent new ice and surface water samples, along with two CTDs, both within the pack and on its margins. From here we conducted six days of 24 hour CTD operations north along A23, occupying almost 30 full depth stations, with d18O sampled on all stations.

At the northern end of A23 we steamed to Cumberland Bay, South Georgia and repeated shore sampling, small boat surface sampling and CTDs along and across Cumberland Bay East and the entrance to Cumberland Bay West. This included shore parties taking glacial cores and water samples from Glacier Col and Gul Lake.

Following this work we proceeded back to Stanley, the Falkland Islands. During all ship operations underway instruments were left on. These included underway water samples taking pCO2, temperature, salinity and d18O, VMADCP velocity measurement, EM122 swath and EA600 acoustics and a full suite of meteorological readings. The only exception to this was within dense pack ice where underway water supplied had to be turned off to avoid ice damage to the intake/pumps.

Chief scientist

Andrew J S Meijers (British Antarctic Survey)

Project

ORCHESTRA

Coordinating body

Natural Environment Research Council (NERC)

Cruise report

(6.83 MB)

Ocean/sea areas

General

South West Atlantic Ocean (limit 20W)
Southern Ocean

Specific

Signy Island, Cumberland Bay (South Georgia).

Track charts

(0.08 MB)

Measurements

Physical oceanography

Surface measurements underway (T,S)

Quantity: track kilometres = 6776
Description: Underway ocean measurements

Surface measurements underway (T,S)

Quantity: track kilometres = 6776
Description: Underway water sampling (surface salinity + d18O bottle samples, every ~4 hours when underway)

Surface measurements underway (T,S)

Quantity: track kilometres = 6776
Description: Underway water sampling surface d18O auto-analyser

Water bottle stations

Quantity: number of stations = 49
Description: CTD casts. Continuous recordings conductivity, temperature, depth, fluorescence, PAR, transmittance.

CTD stations

Quantity: number of stations = 49
Description: CTD casts. Continuous recordings conductivity, temperature, depth, fluorescence, PAR, transmittance.

Current profiler (eg ADCP)

Quantity: number of stations = 48
Description: Lowered Acoustic Doppler Current Profiler mounted on CTD frame.

Current profiler (eg ADCP)

Quantity: track kilometres = 6776
Description: Ship mounted Acoustic Doppler Current Profiler measurements (75 kHz)

Chemical oceanography

Oxygen

Quantity: track kilometres = 6776
Description: Underway water sampling (surface salinity + d18O bottle samples, every ~4 hours when underway)

Oxygen

Quantity: number of cores = 10
Description: Ice core samples from MacLeod Glacier (Signy), Sea Ice (Weddell Sea) and Glacier Col (South Georgia). For salinity + d18O sampling.

Oxygen

Quantity: number of stations = 2
Description: Surface water samples (salinity + d18O) from side of ship

Oxygen

Quantity: number of stations = 3
Description: Surface water samples (salinity + d18O) from small boats

Oxygen

Quantity: track kilometres = 6776
Description: Underway water sampling surface d18O auto-analyser

Oxygen

Quantity: number of stations = 48
Description: CTD water analysis - d18O, sampled trhough water column.

Isotopes

Quantity: number of stations = 3
Description: Surface water samples (salinity + d18O) from small boats

Isotopes

Quantity: number of cores = 10
Description: Ice core samples from MacLeod Glacier (Signy), Sea Ice (Weddell Sea) and Glacier Col (South Georgia). For salinity + d18O sampling.

Isotopes

Quantity: track kilometres = 6776
Description: Underway water sampling surface d18O auto-analyser

Isotopes

Quantity: number of stations = 2
Description: Surface water samples (salinity + d18O) from side of ship

Isotopes

Quantity: track kilometres = 6776
Description: Underway water sampling (surface salinity + d18O bottle samples, every ~4 hours when underway)

Isotopes

Quantity: number of stations = 48
Description: CTD water analysis - d18O, sampled trhough water column.

Other chemical oceanographic measurements

Quantity: number of stations = 49
Description: CTD water analysis - Salinity. Sampled through water column.

Meteorology

Routine standard measurements

Quantity: track kilometres = 6776
Description: Underway meterological measurements

Geology and geophysics

Multi-beam echosounding

Quantity: track kilometres = 6776
Description: EM122 swath bathymetry data

Data held at BODC

Get data

Series/Profiles

48 Acoustic doppler current profiler

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

[Show series]

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

[Hide series]

BODC id	Date/Time	Location
1798080	2016-04-04 21:15:31	60° 45' 11" S 45° 36' 39" W
1798123	2016-04-10 11:34:37	66° 42' 18" S 27° 2' 59" W
1798215	2016-04-13 08:34:55	60° 18' 52" S 30° 57' 28" W
1798319	2016-04-15 06:53:03	57° 7' 10" S 31° 48' 48" W
1798448	2016-04-17 17:45:22	54° 18' 8" S 36° 24' 2" W
1798553	2016-04-18 17:57:23	54° 11' 58" S 36° 27' 58" W
1798577	2016-04-21 18:38:31	53° 58' 6" S 35° 55' 44" W
1798240	2016-04-13 21:16:19	59° 26' 15" S 30° 51' 38" W
1798288	2016-04-14 18:29:44	57° 48' 6" S 30° 49' 54" W
1798356	2016-04-16 04:47:56	55° 43' 30" S 33° 47' 3" W
1798400	2016-04-16 18:13:37	55° 13' 49" S 34° 29' 22" W
1798473	2016-04-17 19:40:11	54° 15' 33" S 36° 26' 5" W
1798172	2016-04-12 10:47:28	62° 4' 35" S 31° 11' 34" W
1798264	2016-04-14 07:11:32	58° 38' 3" S 30° 49' 26" W
1798307	2016-04-15 01:09:03	57° 27' 27" S 31° 19' 48" W
1798504	2016-04-18 14:37:49	54° 13' 29" S 36° 27' 2" W
1798528	2016-04-18 16:14:22	54° 13' 6" S 36° 27' 58" W
1798092	2016-04-04 22:34:19	60° 50' 21" S 45° 32' 49" W
1798159	2016-04-11 16:22:05	63° 4' 20" S 30° 6' 59" W
1798320	2016-04-15 12:45:36	56° 46' 35" S 32° 18' 12" W
1798412	2016-04-16 19:29:20	55° 12' 56" S 34° 30' 27" W
1798436	2016-04-17 16:42:44	54° 19' 30" S 36° 23' 2" W
1798461	2016-04-17 18:45:58	54° 16' 41" S 36° 25' 14" W
1798497	2016-04-18 13:42:16	54° 13' 31" S 36° 26' 11" W
1798196	2016-04-12 22:44:26	61° 10' 16" S 31° 3' 5" W
1798252	2016-04-14 02:12:57	59° 3' 2" S 30° 49' 58" W
1798344	2016-04-16 00:09:49	55° 59' 28" S 33° 25' 18" W
1798424	2016-04-17 12:49:18	54° 21' 55" S 36° 22' 15" W
1798067	2016-04-01 17:24:05	55° 14' 54" S 53° 50' 53" W
1798160	2016-04-12 04:41:09	62° 29' 29" S 31° 15' 35" W
1798184	2016-04-12 16:53:25	61° 39' 39" S 31° 6' 39" W
1798203	2016-04-13 04:34:59	60° 42' 2" S 31° 0' 32" W
1798332	2016-04-15 18:14:54	56° 22' 54" S 32° 52' 22" W
1798516	2016-04-18 15:30:32	54° 13' 29" S 36° 27' 46" W
1798541	2016-04-18 17:04:07	54° 12' 34" S 36° 27' 57" W
1798135	2016-04-11 01:44:40	63° 57' 51" S 28° 52' 38" W
1798589	2016-04-21 20:32:52	53° 48' 28" S 35° 35' 8" W
1798079	2016-04-04 20:22:46	60° 44' 44" S 45° 36' 49" W
1798111	2016-04-09 16:10:37	68° 8' 30" S 31° 0' 13" W
1798147	2016-04-11 10:14:14	63° 21' 5" S 29° 33' 44" W
1798485	2016-04-18 12:51:29	54° 13' 28" S 36° 25' 23" W
1798565	2016-04-21 16:48:41	54° 7' 42" S 36° 16' 27" W
1798227	2016-04-13 12:43:11	60° 0' 3" S 30° 56' 16" W
1798239	2016-04-13 16:24:41	59° 45' 55" S 30° 54' 25" W
1798276	2016-04-14 12:43:24	58° 12' 40" S 30° 49' 6" W
1798368	2016-04-16 10:05:45	55° 29' 11" S 34° 7' 54" W
1798381	2016-04-16 14:14:30	55° 17' 19" S 34° 24' 9" W
1798393	2016-04-16 16:27:21	55° 15' 35" S 34° 26' 35" W

49 CTD/STD cast

Reference numbers
Transmittance and attenuance of the water column
Vertical spatial coordinates
Dissolved oxygen parameters in the water column
Temperature of the water column
Salinity of 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
1795788	2016-04-14 12:40	58° 12' 40" S 30° 49' 5" W
1795820	2016-04-15 06:47	57° 7' 10" S 31° 48' 48" W
1795868	2016-04-16 04:40	55° 43' 30" S 33° 47' 3" W
1795881	2016-04-16 10:00	55° 29' 11" S 34° 7' 54" W
1795973	2016-04-17 06:42	54° 16' 41" S 36° 25' 14" W
1795592	2016-04-04 10:27	60° 50' 21" S 45° 32' 49" W
1795696	2016-04-12 04:48	61° 39' 38" S 31° 6' 39" W
1795715	2016-04-13 04:30	60° 42' 2" S 31° 0' 32" W
1795844	2016-04-15 06:10	56° 22' 54" S 32° 52' 22" W
1795900	2016-04-16 04:22	55° 15' 35" S 34° 26' 35" W
1795924	2016-04-16 07:23	55° 12' 55" S 34° 30' 27" W
1796085	2016-04-21 06:35	53° 58' 5" S 35° 55' 45" W
1795567	2016-04-01 05:20	55° 14' 53" S 53° 50' 53" W
1795611	2016-04-09 04:06	68° 8' 30" S 31° 0' 11" W
1795623	2016-04-10 11:30	66° 42' 18" S 27° 3' 0" W
1795635	2016-04-11 01:40	63° 57' 51" S 28° 52' 38" W
1795739	2016-04-13 12:36	60° 0' 3" S 30° 56' 16" W
1795764	2016-04-14 02:08	59° 3' 2" S 30° 49' 58" W
1795807	2016-04-14 06:25	57° 48' 6" S 30° 49' 54" W
1795893	2016-04-16 02:10	55° 17' 19" S 34° 24' 9" W
1795985	2016-04-17 07:35	54° 15' 33" S 36° 26' 6" W
1796036	2016-04-18 04:10	54° 13' 6" S 36° 27' 58" W
1795703	2016-04-12 10:38	61° 10' 16" S 31° 3' 5" W
1795948	2016-04-17 04:36	54° 19' 30" S 36° 23' 3" W
1795647	2016-04-11 10:10	63° 21' 4" S 29° 33' 44" W
1795659	2016-04-11 04:26	63° 4' 20" S 30° 6' 59" W
1795684	2016-04-12 10:42	62° 4' 35" S 31° 11' 34" W
1795752	2016-04-13 09:10	59° 26' 15" S 30° 51' 38" W
1795961	2016-04-17 05:41	54° 18' 8" S 36° 24' 2" W
1795776	2016-04-14 07:06	58° 38' 3" S 30° 49' 27" W
1795819	2016-04-15 01:04	57° 27' 27" S 31° 19' 49" W
1795856	2016-04-16 12:06	55° 59' 28" S 33° 25' 18" W
1795936	2016-04-17 12:46	54° 21' 55" S 36° 22' 15" W
1796024	2016-04-18 03:27	54° 13' 29" S 36° 27' 46" W
1796048	2016-04-18 05:00	54° 12' 34" S 36° 27' 57" W
1796061	2016-04-18 05:54	54° 11' 58" S 36° 27' 58" W
1795660	2016-04-11 10:41	62° 47' 25" S 30° 41' 42" W
1795727	2016-04-13 08:28	60° 18' 52" S 30° 57' 28" W
1795740	2016-04-13 04:20	59° 45' 55" S 30° 54' 25" W
1795832	2016-04-15 12:41	56° 46' 35" S 32° 18' 12" W
1796073	2016-04-21 04:44	54° 7' 43" S 36° 16' 27" W
1795579	2016-04-04 08:18	60° 44' 44" S 45° 36' 49" W
1795580	2016-04-04 09:10	60° 45' 11" S 45° 36' 38" W
1795672	2016-04-12 04:36	62° 29' 29" S 31° 15' 35" W
1795912	2016-04-16 06:10	55° 13' 49" S 34° 29' 22" W
1795997	2016-04-18 12:49	54° 13' 28" S 36° 25' 22" W
1796000	2016-04-18 01:39	54° 13' 31" S 36° 26' 11" W
1796012	2016-04-18 02:35	54° 13' 29" S 36° 27' 2" W
1796097	2016-04-21 08:30	53° 48' 28" S 35° 35' 8" W

1 Meteorological data logger

Horizontal spatial co-ordinates
Air pressure
Visible waveband radiance and irradiance measurements in the atmosphere
Date and time
Air temperature
Wind strength and direction
Atmospheric humidity

[Show series]

Horizontal spatial co-ordinates
Air pressure
Visible waveband radiance and irradiance measurements in the atmosphere
Date and time
Air temperature
Wind strength and direction
Atmospheric humidity

[Hide series]

BODC id	Date/Time	Location	Doc.
1806874	2016-03-31 20:10 — 2016-04-25 18:53	68° 10' 24" S 58° 28' 54" W — 51° 37' 21" S 26° 47' 9" W

1 Multiple instrument types

Horizontal spatial co-ordinates
Transmittance and attenuance of the water column
Date and time
Salinity of the water column
Temperature of the water column
Metadata parameters
Chlorophyll pigment concentrations in water bodies

[Show series]

[Hide series]

BODC id	Date/Time	Location	Doc.
1806886	2016-03-31 20:10 — 2016-04-25 18:53	68° 10' 24" S 58° 28' 54" W — 51° 37' 21" S 26° 47' 9" W

1 Single-beam echosounder

Horizontal spatial co-ordinates
Date and time
Platform or instrument orientation
Horizontal platform movement
Bathymetry and Elevation

[Show series]

Horizontal spatial co-ordinates
Date and time
Platform or instrument orientation
Horizontal platform movement
Bathymetry and Elevation

[Hide series]

BODC id	Date/Time	Location	Doc.
1806862	2016-03-31 20:10 — 2016-04-25 18:53	68° 10' 24" S 58° 28' 54" W — 51° 37' 21" S 26° 47' 9" W

Discrete samples

49 CTD frame plus rosette sampler

1 Expendable Bathythermograph

67 Glass bottle

73 Sample taken from ship's non-toxic supply

Resources

RRS James Clark Ross JR15006

Cruise summary report

Quick links

BODC holdings

EDMED