RRS Discovery D209

Cruise summary report

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Cruise Info.

Ship name (ship code)

RRS Discovery (74E3)

Cruise identifier

D209

Cruise period

1994-08-03 — 1994-08-22

Status

Completed

Port of departure

Muscat, Oman

Port of return

Muscat, Oman

Purpose

Research

Objectives

1. To investigate the physicochemical feature of the upper ocean with a 10x50km SeaSoar survey with particular reference to the oxygen minimum.
2. To study the distribution patterns of zooplankton and micronekton using ADCp with LHPR and RMT sampling.
3. To determine the nutrient budget for the region by means of CTD profiles from the surface to the bottom, in a box of stations surrounding the SeaSoar survey.
4. To collect data on the optical characteristics of the upper water column, using instruments mounte dof the CTD, SeaSoar and Lightfish.
5. To investigate the vertical distribution of bioluminescence in pumpre profiles, and the biochemical characteristics of some of the bioluminescent organisms.
6. To carry out a predetermined suite of measurements at the Arabesque reference station at the start and end of the cruise.

Chief scientist

Peter J Herring (Institute of Oceanographic Sciences Deacon Laboratory)

Project

Part WOCE

Coordinating body

IOC/WMO; within UK - NERC

Cruise report

(2.05 MB)

Ocean/sea areas

General

Indian Ocean
Arabian Sea

Specific

NW Indian Ocean/Arabian Sea, 1830-20N; 58-59 30E

Track charts

(0.04 MB)

Measurements

Physical oceanography

Water bottle stations

Quantity: number of stations = 15

CTD stations

Quantity: number of stations = 15
Description: Neil Brown MKIII with sensors

Subsurface temperature and salinity measurements

Quantity: number of surveys = 2
Description: SeaSoar (CTD with sensors)

Transparency (eg transmissometer)

Quantity: number of stations = 15
Description: CTD sensor

Optics (eg underwater light levels)

Quantity: number of surveys = 2
Description: SeaSoar (CTD,fluorometer,irradiance sensor,light sensor)

Optics (eg underwater light levels)

Quantity: number of deployments = 4
Description: lightfish with up and downlooking irradiance sensors

Current profiler (eg ADCP)

Description: continuous shipborne ADCP profiles

Chemical oceanography

Oxygen

Quantity: number of surveys = 2
Description: SeaSoar (CTD, O2 sensor)

Oxygen

Quantity: number of stations = 15
Description: CTD sensor

Oxygen

Quantity: number of stations = 15

Phosphate

Quantity: number of stations = 15

Nitrate

Quantity: number of stations = 15

Nitrite

Quantity: number of stations = 15

Silicate

Quantity: number of stations = 15

Biology and fisheries

Phytoplankton pigs (eg chlorophyll, fluorescence)

Quantity: number of stations = 15

Phytoplankton pigs (eg chlorophyll, fluorescence)

Quantity: number of stations = 15
Description: CTD sensor (fluorometer)

Phytoplankton pigs (eg chlorophyll, fluorescence)

Phytoplankton

Zooplankton

Quantity: number of hauls = 51
Description: rectangular mid-water trawls (RMT 1+8m), horizontal tows

Zooplankton

Quantity: number of hauls = 6
Description: Longhurst Hardy Plankton Recoder

Nekton

Quantity: number of hauls = 51
Description: rectangular mid-water trawls (RMT 1+8m), horizontal tows

Pelagic bacteria/micro-organisms

Quantity: number of samples = 8
Description: samples for luminous and non-luminous bacteria

Acoustic reflection on marine organisms.

Description: continuous from shipborne ADCP, to correlate with net samples

Other biological/fisheries measurement

Quantity: number of profiles = 12
Description: French bioluminescence profiler

Meteorology

Routine standard measurements

Description: continuous

Data held at BODC

Get data

Series/Profiles

17 Bottle station

Reference numbers
Phosphate concentration parameters in the water column
Vertical spatial coordinates
Silicate concentration parameters in the water column
Nitrate concentration parameters in the water column
Quality control flags

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BODC id	Date/Time	Location
1299760	1994-08-07 01:25	19° 19' 26" N 59° 11' 39" E
1299803	1994-08-07 18:35	19° 46' 47" N 58° 25' 43" E
1299827	1994-08-08 02:34	19° 12' 9" N 58° 3' 3" E
1299747	1994-08-06 08:00	19° 1' 3" N 59° 15' 8" E
1299759	1994-08-06 14:37	19° 13' 15" N 59° 23' 13" E
1299840	1994-08-08 10:52	18° 58' 30" N 58° 25' 52" E
1299852	1994-08-08 15:35	18° 51' 37" N 58° 36' 52" E
1299735	1994-08-06 03:42	18° 50' 23" N 59° 8' 21" E
1299815	1994-08-07 23:00	19° 30' 6" N 58° 14' 28" E
1299864	1994-08-08 21:53	18° 44' 35" N 58° 48' 44" E
1299723	1994-08-05 17:57	18° 59' 47" N 59° 0' 51" E
1299839	1994-08-08 07:08	19° 5' 20" N 58° 14' 35" E
1299772	1994-08-07 06:31	19° 25' 55" N 59° 0' 29" E
1299888	1994-08-21 02:33	18° 59' 27" N 58° 59' 41" E
1299796	1994-08-07 15:04	19° 39' 29" N 58° 38' 7" E
1299876	1994-08-09 02:33	18° 38' 19" N 59° 0' 9" E
1299784	1994-08-07 11:05	19° 32' 17" N 58° 49' 27" E

21 CTD/STD cast

Transmittance and attenuance of the water column
Salinity of the water column
Temperature of the water column
Vertical spatial coordinates
Density of the water column
Chlorophyll pigment concentrations in water bodies

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[Hide series]

BODC id	Date/Time	Location
1006472	1994-08-07 18:20	19° 46' 47" N 58° 25' 43" E
1006552	1994-08-10 03:15	19° 36' 55" N 58° 30' 58" E
1006588	1994-08-18 05:35	19° 3' 31" N 58° 12' 11" E
1006484	1994-08-07 22:45	19° 30' 6" N 58° 14' 28" E
1006607	1994-08-21 01:02	18° 59' 27" N 58° 59' 41" E
1006496	1994-08-08 02:22	19° 12' 9" N 58° 3' 3" E
1006503	1994-08-08 06:34	19° 5' 21" N 58° 14' 35" E
1006539	1994-08-08 20:40	18° 44' 35" N 58° 48' 44" E
1006540	1994-08-09 01:09	18° 38' 19" N 59° 0' 9" E
1006527	1994-08-08 14:18	18° 51' 37" N 58° 36' 52" E
1006576	1994-08-16 18:47	18° 56' 56" N 59° 5' 24" E
1006423	1994-08-06 13:15	19° 13' 15" N 59° 23' 13" E
1006459	1994-08-07 09:56	19° 32' 16" N 58° 49' 27" E
1006460	1994-08-07 14:29	19° 39' 29" N 58° 38' 7" E
1006564	1994-08-12 13:44	19° 8' 36" N 59° 5' 24" E
1006392	1994-08-06 02:20	18° 50' 22" N 59° 8' 21" E
1006411	1994-08-06 06:41	19° 1' 4" N 59° 15' 8" E
1006515	1994-08-08 09:38	18° 58' 30" N 58° 25' 52" E
1006380	1994-08-05 16:27	18° 59' 47" N 59° 0' 51" E
1006435	1994-08-07 00:08	19° 19' 26" N 59° 11' 39" E
1006447	1994-08-07 05:17	19° 25' 55" N 59° 0' 29" E

1 Pumped water sample

Horizontal spatial co-ordinates
Date and time
Phosphate concentration parameters in the water column
Nitrate concentration parameters in the water column

[Show series]

Horizontal spatial co-ordinates
Date and time
Phosphate concentration parameters in the water column
Nitrate concentration parameters in the water column

[Hide series]

BODC id	Date/Time	Location	Doc.
1360458	1994-08-10 19:30 — 1994-08-18 02:05	18° 43' 15" N 58° 3' 2" E — 19° 46' 25" N 59° 23' 17" E

Discrete samples

21 CTD frame plus rosette sampler

Transmittance and attenuance of the water column
Phosphate concentration parameters in the water column
Salinity of the water column
Temperature of the water column
Dissolved oxygen parameters in the water column
Silicate concentration parameters in the water column
Density of the water column
Phaeopigment concentrations in the water column
Nitrate concentration parameters in the water column
Chlorophyll pigment concentrations in water bodies

167 Sample taken from ship's non-toxic supply

Phosphate concentration parameters in the water column
Salinity of the water column
Dissolved oxygen parameters in the water column
Phaeopigment concentrations in the water column
Nitrate concentration parameters in the water column
Chlorophyll pigment concentrations in water bodies

276 SeaSoar profile from gridded data

Salinity of the water column
Temperature of the water column
Density of the water column
Chlorophyll pigment concentrations in water bodies

1698 Shipborne Acoustic Doppler Current Profile

Resources

RRS Discovery D209

Cruise summary report

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