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BODC Cruise Metadata Report for RRS Charles Darwin (74AB) cruise CD150

Introduction

This report collates information from the BODC cruise inventory and oceanographic databases. It presents

Cruise Inventory Information

Long name RRS Charles Darwin (74AB) cruise CD150
Short name CD150
Objectives and Narrative RRS Charles Darwin Cruise 150 forms part of a larger programme of research ("Benthic processes in the Arabian Sea: mechanistic relationships between benthos, sediment, biogeochemistry and organic matter cycling"), focusing on the benthic biogeochemistry of the Pakistan Margin, that includes four cruises in total (CD145, 146, 150 and 151). The primary objectives of the present cruise are:
a) to revisit a series of five previously established study sites (A140, A300, A950, A1200 and A1850) spanning the Arabian Sea oxygen minimum zone as it impinges on the seabed at the Pakistan Margin;
b) to assess the chemical oceanography of the water column overlying these sites, through CTD sensor profiles and chemical determinations on water bottle samples from both the CTD and BBLS;
c) to initiate a programme of detailed seabed sampling at these sites to determine a suite of biological, chemical and biogeochemical parameters using a Megacorer and a multicorer;
d) to assess and sample the megabenthos of these sites by the combined use of trawling (Agassiz trawl) and seabed photography (WASP);
e) as possible, to carry out similar operations at a site located at a depth between A300 and A950;
f) as possible, to provide additional general characterisation of the seabed in the area of these sites using acoustic remote sensing (EM12 and 3.5 kHz) and seabed imagery (WASP).
CD150 sailed Muscat (Oman) 22 August 2003 and proceed to the Indus Margin to carry out a programme of work as detailed above. The work was undertaken between 24 Aug-12 Sep, the vessel returning to Muscat 15 September 2003 (full details are given in cruise report).
Ship RRS Charles Darwin
Departure Port Muscat, Oman
Departure Date 2003-08-22
Arrival Port Muscat, Oman
Arrival Date 2003-09-15
Principal Scientist(s) Brian James Bett (Southampton Oceanography Centre)
Responsible Organisation Federal Research Centre for Fisheries, Hamburg
Associated Project(s) Benthic processes in the Arabian Sea
IHB Sea Areas Visited Indian Ocean, Arabian Sea
Marsden Squares Visited 102
Work Area Description Indian Ocean; Arabian Sea; Indus Margin
Work Area Bounding Polygon 20N,60E; 30N,60E; 30N,70E; 20N,70E; 20N,60E
Southern Limit 20N
Northern Limit 30N
Western Limit 60E
Eastern Limit 70E

Cruise Inventory Datasets

Physical oceanography  
CTD stations Quantity: number of stations = 7
Description: Water Column: CTD data and water bottle casts at 7 sites spanning OMZ, generating CTD profile data. Various chemical analyses from water bottles.  
CTD stations Quantity: number of stations = 7
Description: Water Column: CTD casts at seven sites in the upper boundary of the OMZ (soundings c. 90-300m), generating CTD profile data.  
Water bottle stations Quantity: number of stations = 7
Description: Water Column: CTD data and water bottle casts at 7 sites spanning OMZ, generating CTD profile data. Various chemical analyses from water bottles.  
Chemical oceanography  
Isotopes Quantity: number of stations = 6
Description: Sediment Chemistry: megacore samples collected at 6 sites spanning the OMZ. Samples retained for the analysis of various parameters including photosynthetic pigments, lipids, Thorium, biochemicals, pH, trace metals, DOC, DIC, sulphate, radionuclides.  
Other chemical oceanographic measurements Quantity: number of stations = 6
Description: Sediment Chemistry: megacore samples collected at 6 sites spanning the OMZ. Samples retained for the analysis of various parameters including photosynthetic pigments, lipids, Thorium, biochemicals, pH, trace metals, DOC, DIC, sulphate, radionuclides.  
Radioactivity Quantity: number of hauls = 12
Description: AGASSIZ TRAWL HAULS: 12 successful hauls (11 yielding biological material) at various sites throughout the OMZ (soundings c. 140-1820), generating general trawl catch samples, ethanol preserved material for genetic studies, tissue and whole animal samples for various biochemical assessments, gut content radionuclides  
pH Quantity: number of stations = 6
Description: Sediment Chemistry: megacore samples collected at 6 sites spanning the OMZ. Samples retained for the analysis of various parameters including photosynthetic pigments, lipids, Thorium, biochemicals, pH, trace metals, DOC, DIC, sulphate, radionuclides.  
Contamination  
Trace metals Quantity: number of stations = 6
Description: Sediment Chemistry: megacore samples collected at 6 sites spanning the OMZ. Samples retained for the analysis of various parameters including photosynthetic pigments, lipids, Thorium, biochemicals, pH, trace metals, DOC, DIC, sulphate, radionuclides.  
Biology and fisheries  
Biochemical measurements (eg lipids, amino acids) Quantity: number of hauls = 12
Description: AGASSIZ TRAWL HAULS: 12 successful hauls (11 yielding biological material) at various sites throughout the OMZ (soundings c. 140-1820), generating general trawl catch samples, ethanol preserved material for genetic studies, tissue and whole animal samples for various biochemical assessments, gut content radionuclides  
Biochemical measurements (eg lipids, amino acids) Quantity: number of stations = 6
Description: Sediment Chemistry: megacore samples collected at 6 sites spanning the OMZ. Samples retained for the analysis of various parameters including photosynthetic pigments, lipids, Thorium, biochemicals, pH, trace metals, DOC, DIC, sulphate, radionuclides.  
Other biological/fisheries measurement Quantity: number of hauls = 12
Description: AGASSIZ TRAWL HAULS: 12 successful hauls (11 yielding biological material) at various sites throughout the OMZ (soundings c. 140-1820), generating general trawl catch samples, ethanol preserved material for genetic studies, tissue and whole animal samples for various biochemical assessments, gut content radionuclides  
Phytobenthos Quantity: number of stations = 6
Description: Sediment Biology: Megacore and multicore samples collected at 6 sites spanning the OMZ. Samples retained for the analysis of macrobenthos and meiobenthos.  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: number of stations = 6
Description: Sediment Chemistry: megacore samples collected at 6 sites spanning the OMZ. Samples retained for the analysis of various parameters including photosynthetic pigments, lipids, Thorium, biochemicals, pH, trace metals, DOC, DIC, sulphate, radionuclides.  
Zoobenthos Quantity: number of hauls = 12
Description: AGASSIZ TRAWL HAULS: 12 successful hauls (11 yielding biological material) at various sites throughout the OMZ (soundings c. 140-1820), generating general trawl catch samples, ethanol preserved material for genetic studies, tissue and whole animal samples for various biochemical assessments, gut content radionuclides  
Zoobenthos Quantity: number of stations = 6
Description: Sediment Biology: Megacore and multicore samples collected at 6 sites spanning the OMZ. Samples retained for the analysis of macrobenthos and meiobenthos.  
Geology and geophysics  
Bottom photography Quantity: number of deployments = 23
Description: WASP CAMERA TOWS: various sites throught the OMZ (soundings c. 140-1850 m) generating digital video footage (c. 20 hours) and still photographs (c. 7000).  
Core - soft bottom Quantity: number of stations = 6
Description: Sediment Chemistry: megacore samples collected at 6 sites spanning the OMZ. Samples retained for the analysis of various parameters including photosynthetic pigments, lipids, Thorium, biochemicals, pH, trace metals, DOC, DIC, sulphate, radionuclides.  
Core - soft bottom Quantity: number of stations = 6
Description: Sediment Biology: Megacore and multicore samples collected at 6 sites spanning the OMZ. Samples retained for the analysis of macrobenthos and meiobenthos.  
Multi-beam echosounding Quantity: activity duration in days = 1
Description: SWATH BATHYMETRY: limited Simard EM12 operations  
Single channel seismic reflection Quantity: activity duration in days = 1
Description: SUB-BOTTOM PROFILING: limited operation of 3.5 kHz profiling system  
Single-beam echosounding Quantity: activity duration in days = 21
Description: ECHO-SOUNDING: Simrad EA500 10kHZz sounding run more-or-less continuously  

Cruise Inventory Mooring/Buoy Operations

No information on datasets is currently available

Summary of BODC Data Holdings for the Cruise

National Oceanographic Database

Summary

# Series Instrument Description Parameters
7 Bottle station Ammonium and ammonia concentration parameters in water bodies
Metadata parameters
Nitrate concentration parameters in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Quality control flags
Reference numbers
Silicate concentration parameters in the water column
Vertical spatial coordinates

Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)

Full List

BODC Reference Instrument Description Date/Time Location  
1748071 Bottle station 2003-08-24 05:29Z 22° 52' N, 66° 0' E Click for more
1748083 Bottle station 2003-08-27 05:14Z 23° 0' N, 66° 24' E Click for more
1748095 Bottle station 2003-08-29 11:14Z 22° 55' N, 66° 36' E Click for more
1748102 Bottle station 2003-08-31 05:22Z 23° 12' N, 66° 34' E Click for more
1748114 Bottle station 2003-09-02 07:38Z 23° 16' N, 66° 42' E Click for more
1748126 Bottle station 2003-09-04 04:43Z 23° 7' N, 66° 30' E Click for more
1748138 Bottle station 2003-09-07 05:35Z 23° 0' N, 66° 41' E Click for more

Project Database

# Events Gear Type Parameters Held
16 CTD frame plus rosette sampler Ammonium and ammonia concentration parameters in water bodies
Transmittance and attenuance of the water column
Density of the water column
Chlorophyll pigment concentrations in water bodies
Silicate concentration parameters in the water column
Salinity of the water column
Concentration of suspended particulate material in the water column
Nitrate concentration parameters in the water column
Temperature of the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Dissolved oxygen parameters in the water column
20 Sample taken from ship's non-toxic supply Salinity of the water column

Note: Parameter terms are taken from the BODC Parameter Discovery Vocabulary XML (SKOS)

References

Track Charts

Track Chart

Reports

Cruise Report