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BODC Cruise Metadata Report for RRS Challenger (74CH) cruise CH62A

Introduction

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

Cruise Inventory Information

Long name RRS Challenger (74CH) cruise CH62A
Short name CH62A
Objectives and Narrative 1. To measure the concentrations and investigate the spatial distribution of the major nutrients: Nitrate, Nitrite, Ammonia, Silicate, Urea and Phosphate. Particular emphasis is being placed on these distributions in the sea area influenced by major European estuaries flowing into the North Sea.
2. To establish the relationships, and contribution of, these nutrient species to the formation of phytoplankton blooms. Specific attention will be paid to the contributions made by ammonia, phosphate and urea.
3. To carry out on-board mixing experiments using estuarine and offshore water samples.
4. To carry out deep gravity coring in order to study the historical record of Eutrophication using 15N, 13C and 14C compounds and other isotope dating techniques.
5. To investigate the distributions of chlorophyll and particulate organic carbon and nitrogen within the study area.
6. To study the primary production and assimilation rates of the phytoplankton using 32P. 14C and 15N tracers.
7. To investigate bacterial production using 3H-thymidine and methane oxidising bacteria using 14CH4/
8. To investigate the influence of benthic macrofauna on re-suspension of particulate matter of two contrasting sites of the North Sea.
Ship RRS Challenger
Departure Port Great Yarmouth, United Kingdom
Departure Date 1989-10-23
Arrival Port Cardiff, United Kingdom
Arrival Date 1989-11-03
Principal Scientist(s) Nicholas J P Owens (Plymouth Marine Laboratory)
Responsible Organisation Defence Evaluation and Research Agency Winfrith
Associated Project(s) NERC North Sea Blooms
IHB Sea Areas Visited North Sea
Marsden Squares Visited 181;1/216;1/216;2
Work Area Description North Sea
Work Area Bounding Polygon 50N,5W; 55N,5W; 55N,10E; 50N,10E; 50N,5W
Southern Limit 50N
Northern Limit 55N
Western Limit 5W
Eastern Limit 10E

Cruise Inventory Datasets

Physical oceanography  
CTD stations Quantity: number of stations = 13
Description:  
Optics (eg underwater light levels) Quantity: number of stations = 13
Description:  
Subsurface temperature and salinity measurements Quantity: track kilometres = 2592
Description:  
Surface measurements underway (T,S) Quantity: track kilometres = 2592
Description:  
Transparency (eg transmissometer) Quantity: track kilometres = 2592
Description:  
Water bottle stations Quantity: number of stations = 13
Description:  
Chemical oceanography  
Ammonia Quantity: track kilometres = 2592
Description: dissolved, measuring concentrations and spatial distribution.  
Nitrate Quantity: track kilometres = 2592
Description: measuring concentrations and spatial distribution.  
Nitrite Quantity: track kilometres = 2592
Description: measuring concentrations and spatial distribution.  
Oxygen Quantity: track kilometres = 2592
Description:  
Phosphate Quantity: track kilometres = 2592
Description: measuring concentrations and spatial distribution.  
Silicate Quantity: track kilometres = 2592
Description: measuring concentrations and spatial distribution.  
Contamination  
Other dissolved substances Quantity: number of stations = 56
Description: organic P  
Suspended matter Quantity: number of stations = 56
Description:  
Biology and fisheries  
Particulate organic matter (inc POC, PON) Quantity: number of samples = 112
Description:  
Pelagic bacteria/micro-organisms Quantity: number of stations = 30
Description: distribution,biomass determination,energy transfers  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: number of stations = 56
Description: 1400 nautical miles  
Primary productivity Quantity: number of stations = 56
Description:  
Seston Quantity: number of stations = 56
Description:  
Meteorology  
Incident radiation Quantity: track kilometres = 2963
Description:  
Occasional standard measurements Quantity: number of measurements = 40
Description:  
Geology and geophysics  
Core - soft bottom Quantity: number of cores = 11
Description: deep gravity coring to study historical record of eutrophication.  

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
9 Bottle station Chlorophyll pigment concentrations in water bodies
Quality control flags
Reference numbers
Vertical spatial coordinates
10 CTD/STD cast Chlorophyll pigment concentrations in water bodies
Concentration of suspended particulate material in the water column
Density of the water column
Salinity of the water column
Temperature of the water column
Transmittance and attenuance of the water column
Vertical spatial coordinates
Visible waveband radiance and irradiance measurements in the water column
3 CTD/STD cast Chlorophyll pigment concentrations in water bodies
Density of the water column
Salinity of the water column
Temperature of the water column
Transmittance and attenuance of the water column
Vertical spatial coordinates
Visible waveband radiance and irradiance measurements in the water column
1 Meteorological data logger Date and time
Horizontal spatial co-ordinates
Visible waveband radiance and irradiance measurements in the atmosphere
1 Ship's non-toxic supply Ammonium and ammonia concentration parameters in water bodies
Chlorophyll pigment concentrations in water bodies
Concentration of suspended particulate material in the water column
Date and time
Horizontal spatial co-ordinates
Nitrate concentration parameters in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
Salinity of the water column
Silicate concentration parameters in the water column
Temperature of the water column
Transmittance and attenuance of the water column
1 Single-beam echosounder Bathymetry and Elevation
Date and time
Horizontal spatial co-ordinates

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

Full List

BODC Reference Instrument Description Date/Time Location  
822471 CTD/STD cast 1989-10-24 09:34Z 53° 32' N, 0° 59' E Click for more
822483 CTD/STD cast 1989-10-24 17:35Z 54° 9' N, 0° 4' E Click for more
822495 CTD/STD cast 1989-10-25 08:51Z 54° 40' N, 1° 6' W Click for more
822502 CTD/STD cast 1989-10-25 17:35Z 53° 54' N, 0° 0' W Click for more
822514 CTD/STD cast 1989-10-26 09:05Z 53° 6' N, 2° 57' E Click for more
822526 CTD/STD cast 1989-10-26 16:34Z 53° 55' N, 2° 21' E Click for more
822538 CTD/STD cast 1989-10-27 05:05Z 54° 34' N, 4° 50' E Click for more
822551 CTD/STD cast 1989-10-27 12:05Z 54° 34' N, 4° 48' E Click for more
822563 CTD/STD cast 1989-10-28 09:47Z 54° 51' N, 8° 0' E Click for more
822575 CTD/STD cast 1989-10-28 16:30Z 53° 59' N, 7° 46' E Click for more
822587 CTD/STD cast 1989-11-01 09:57Z 52° 8' N, 1° 47' E Click for more
822599 CTD/STD cast 1989-11-01 17:05Z 51° 57' N, 1° 46' E Click for more
822606 CTD/STD cast 1989-11-02 00:13Z 51° 25' N, 1° 25' E Click for more
953274 Single-beam echosounder 1989-10-23 18:30Z to 1989-11-02 07:30Z 50° 52' N to 55° 14' N; 1° 22' W to 8° 15' E Click for more
953286 Meteorological data logger 1989-10-23 18:30Z to 1989-11-02 07:30Z 50° 52' N to 55° 14' N; 1° 22' W to 8° 15' E Click for more
953298 Ship's non-toxic supply 1989-10-23 18:30Z to 1989-11-02 07:30Z 50° 52' N to 55° 14' N; 1° 22' W to 8° 15' E Click for more
1691067 Bottle station 1989-10-24 17:41Z 54° 9' N, 0° 4' E Click for more
1691079 Bottle station 1989-10-25 08:57Z 54° 40' N, 1° 6' W Click for more
1691080 Bottle station 1989-10-25 17:41Z 53° 54' N, 0° 0' W Click for more
1691092 Bottle station 1989-10-26 09:12Z 53° 6' N, 2° 57' E Click for more
1691111 Bottle station 1989-10-26 16:38Z 53° 55' N, 2° 21' E Click for more
1691123 Bottle station 1989-10-28 16:36Z 53° 59' N, 7° 46' E Click for more
1691135 Bottle station 1989-11-01 10:03Z 52° 8' N, 1° 47' E Click for more
1691147 Bottle station 1989-11-01 17:10Z 51° 57' N, 1° 46' E Click for more
1691159 Bottle station 1989-11-02 00:18Z 51° 25' N, 1° 25' E Click for more

Project Database

# Events Gear Type Parameters Held
48 Sample taken from ship's non-toxic supply Concentration of suspended particulate material in the water column
13 CTD frame plus rosette sampler Transmittance and attenuance of the water column
Visible waveband radiance and irradiance measurements in the water column
Density of the water column
Chlorophyll pigment concentrations in water bodies
Salinity of the water column
Concentration of suspended particulate material in the water column
Temperature 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