Search the data

BODC Cruise Metadata Report for RRS Discovery cruise DY026A

Introduction

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

Cruise Inventory Information

Long name RRS Discovery cruise DY026A
Short name DY026A
Objectives and Narrative DY26A formed part of the NERC shelf sea biogeochemistry programme. It had four principal objectives
1. To continue the seasonal time series sampling at three key sites in the Celtic Sea (Shelf break, Candyfloss, Celtic Deep).
2. To provide sampling opportunities for the Shelf sea biogeochemistry students
3. To obtain samples of sinking particulate organic matter at differing stages of the tidal cycle to examine the role of tidal resuspension on elemental cycling beneath the thermocline.
4. To trial autonomous nitrate sensors CTDs and gliders as part of the Sensors on Gliders programme

Objective 1: We conducted CTD casts at each key site, sampling for DIC and nitrate concentrations to evaluate the differential uptake and remineralisation of these tracers which is key to the operation of the shelf sea pump. In addition we made at each site many of the rate measurements the programme needs to make to understand the differential elemental cycling.
Objective 2: Each SSB student got a good range of sampling opportunities at various sites in varying weather conditions.
Objective 3: Following the standard SSB observations outlined in objective 1 we undertook a highly temporally resolved timeseries of observations at the Celtic Deep. This comprised hourly CTDs with very high resolution sampling near the bed coupled to hourly snowcatcher deployments and near bottom respiration, bacterial production and nitrification measurements. Following this we revisited the same site over a tidal cycle and collected near bed suspended material for similar biological rate measurements.
Objective 4: The Sensors on gliders programme has integrated a nitrate sensor into a glider. This combination was trialled at the shelf break and on one further occasion during the cruise. Both deployments produced useful data. In addition the nitrate sensor itself was deployed on the CTD in standalone mode on two occasions with extended bottle stops to allow reliable measurements to be made.
Ship RRS Discovery
Departure Port Southampton, United Kingdom
Departure Date 2014-08-03
Arrival Port Southampton, United Kingdom
Arrival Date 2014-08-14
Principal Scientist(s) Richard Sanders (National Oceanography Centre, Southampton)
Responsible Organisation National Oceanography Centre, Southampton
Associated Project(s) Shelf Sea Biogeochemistry
IHB Sea Areas Visited Celtic Sea
Marsden Squares Visited 181
Work Area Description
Work Area Bounding Polygon 50N,10W; 60N,10W; 60N,0E; 50N,0E; 50N,10W
Southern Limit 50N
Northern Limit 60N
Western Limit 10W
Eastern Limit 0E

Cruise Inventory Datasets

Physical oceanography  
CTD stations Quantity: number of stations = 33
Description: Temperature and Salinity were measured continuously on 33 CTD stations  
Chemical oceanography  
Alkalinity Quantity: number of samples = 10
Description: Samples for Alkalinity and TCO2 were taken on 10 CTD stations at 6 depths in the vertical.  
Ammonia Quantity: number of stations = 33
Description: Inorganic nutrients were measured at 6-10 depths on CTD casts and on experiments undertaken to examine zooplankton metabolism  
Carbon dioxide Quantity: number of samples = 10
Description: Samples for Alkalinity and TCO2 were taken on 10 CTD stations at 6 depths in the vertical.  
Nitrate Quantity: number of stations = 33
Description: Inorganic nutrients were measured at 6-10 depths on CTD casts and on experiments undertaken to examine zooplankton metabolism  
Nitrite Quantity: number of stations = 33
Description: Inorganic nutrients were measured at 6-10 depths on CTD casts and on experiments undertaken to examine zooplankton metabolism  
Other dissolved gases Quantity: number of stations = 10
Description: Oxygen/ Argon ratios were measured on water from 10 CTD stations.  
Oxygen Quantity: number of stations = 33
Description: Dissolved oxygen, total nitrogen and phosphorus and a range of organic tracers such as amino acids were sampled from 6-10 bottles on 33 CTD casts  
Phosphate Quantity: number of stations = 33
Description: Inorganic nutrients were measured at 6-10 depths on CTD casts and on experiments undertaken to examine zooplankton metabolism  
Silicate Quantity: number of stations = 33
Description: Inorganic nutrients were measured at 6-10 depths on CTD casts and on experiments undertaken to examine zooplankton metabolism  
Total - N Quantity: number of stations = 33
Description: Dissolved oxygen, total nitrogen and phosphorus and a range of organic tracers such as amino acids were sampled from 6-10 bottles on 33 CTD casts  
Total - P Quantity: number of stations = 33
Description: Dissolved oxygen, total nitrogen and phosphorus and a range of organic tracers such as amino acids were sampled from 6-10 bottles on 33 CTD casts  
Biology and fisheries  
Biochemical measurements (eg lipids, amino acids) Quantity: number of stations = 33
Description: Dissolved oxygen, total nitrogen and phosphorus and a range of organic tracers such as amino acids were sampled from 6-10 bottles on 33 CTD casts  
Dissolved organic matter (inc DOC) Quantity: number of stations = 33
Description: Dissolved oxygen, total nitrogen and phosphorus and a range of organic tracers such as amino acids were sampled from 6-10 bottles on 33 CTD casts  
Other biological/fisheries measurement Quantity: number of deployments = 43
Description: 43 deployments of marine snowcatchers were undertaken  
Other biological/fisheries measurement Quantity: number of measurements = 10
Description: Respiration measurements were made on water collected using CTD samplers and Marine Snowcatchers.  
Other biological/fisheries measurement Quantity: number of measurements = 10
Description: Ammonification and Nitrification measurements were made on water collected using CTD samplers and Marine Snowcatchers.  
Particulate organic matter (inc POC, PON) Quantity: number of stations = 33
Description: Dissolved oxygen, total nitrogen and phosphorus and a range of organic tracers such as amino acids were sampled from 6-10 bottles on 33 CTD casts  
Pelagic bacteria/micro-organisms Quantity: number of measurements = 10
Description: Bacterial Production measurements were made on water collected using CTD samplers and Marine Snowcatchers.  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: number of stations = 10
Description: Size fractionated Phytoplankton Productivity and Chlorophyll Concentrations were measured on water from 10 CTD stations.  
Phytoplankton pigs (eg chlorophyll, fluorescence) Quantity: number of samples = 10
Description: HPLC and Lugols samples were taken from CTD bottles fired in the deep Chlorophyll maxima. Similar observations and samples were made using samples from Marine snowcatchers triggered above and below the thermocline.  
Primary productivity Quantity: number of stations = 10
Description: Size fractionated Phytoplankton Productivity and Chlorophyll Concentrations were measured on water from 10 CTD stations.  
Zooplankton Quantity: number of hauls = 52
Description: Net hauls were undertaken on 52 Occasions. Samples were vertically resolved, collected at day and night and size segregated (>63 microns and >200 microns)  
Zooplankton Quantity: number of samples = 10
Description: HPLC and Lugols samples were taken from CTD bottles fired in the deep Chlorophyll maxima. Similar observations and samples were made using samples from Marine snowcatchers triggered above and below the thermocline.  
Geology and geophysics  
Core - soft bottom Quantity: number of cores = 15
Description: A NIOZ box corer was used on 15 occasions. Experimental work on ammonium release was undertaken and samples preserved.  

Cruise Inventory Mooring/Buoy Operations

Latitude Longitude Data type Description
51° 12' N 6° 8' W Other physical oceanographic measurements Deployment and recovery of glider with nitrate sensor
48° 20' N 9° 43' W Other physical oceanographic measurements Deployment and recovery of glider with nitrate sensor

Summary of BODC Data Holdings for the Cruise

National Oceanographic Database

Summary

# Series Instrument Description Parameters
32 CTD/STD cast Chlorophyll pigment concentrations in water bodies
Density of the water column
Dissolved oxygen parameters in the water column
Electrical conductivity of the water column
Optical backscatter
Reference numbers
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 CTD/STD cast Chlorophyll pigment concentrations in water bodies
Density of the water column
Dissolved oxygen parameters in the water column
Electrical conductivity of the water column
Optical backscatter
Reference numbers
Salinity of the water column
Temperature of the water column
Transmittance and attenuance of the water column
Vertical spatial coordinates
1 Meteorological data logger Air pressure
Air temperature
Atmospheric humidity
Date and time
Horizontal spatial co-ordinates
Solar Radiation
Visible waveband radiance and irradiance measurements in the atmosphere
Wind strength and direction
1 Multiple instrument types Chlorophyll pigment concentrations in water bodies
Date and time
Electrical conductivity of the water column
Horizontal spatial co-ordinates
Metadata parameters
Raw fluorometer output
Salinity of 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 platform movement
Horizontal spatial co-ordinates
Platform or instrument orientation

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

Full List

BODC Reference Instrument Description Date/Time Location  
1372994 CTD/STD cast 2014-08-04 11:21Z 49° 48' N, 5° 28' W Click for more
1373008 CTD/STD cast 2014-08-05 05:10Z 49° 23' N, 8° 37' W Click for more
1373021 CTD/STD cast 2014-08-05 11:03Z 49° 22' N, 8° 36' W Click for more
1373033 CTD/STD cast 2014-08-05 16:10Z 49° 22' N, 8° 36' W Click for more
1373045 CTD/STD cast 2014-08-06 08:23Z 48° 20' N, 9° 43' W Click for more
1373057 CTD/STD cast 2014-08-07 06:04Z 48° 34' N, 9° 30' W Click for more
1373069 CTD/STD cast 2014-08-07 11:10Z 48° 34' N, 9° 31' W Click for more
1373070 CTD/STD cast 2014-08-07 15:00Z 48° 34' N, 9° 30' W Click for more
1373082 CTD/STD cast 2014-08-08 11:05Z 50° 15' N, 7° 44' W Click for more
1373094 CTD/STD cast 2014-08-09 06:08Z 51° 8' N, 6° 35' W Click for more
1373101 CTD/STD cast 2014-08-09 10:40Z 51° 7' N, 6° 37' W Click for more
1373113 CTD/STD cast 2014-08-09 13:30Z 51° 7' N, 6° 37' W Click for more
1373125 CTD/STD cast 2014-08-09 16:04Z 51° 7' N, 6° 37' W Click for more
1373137 CTD/STD cast 2014-08-10 06:58Z 51° 9' N, 6° 34' W Click for more
1373149 CTD/STD cast 2014-08-10 08:00Z 51° 9' N, 6° 34' W Click for more
1373150 CTD/STD cast 2014-08-10 08:59Z 51° 9' N, 6° 34' W Click for more
1373162 CTD/STD cast 2014-08-10 10:00Z 51° 9' N, 6° 35' W Click for more
1373174 CTD/STD cast 2014-08-10 11:03Z 51° 9' N, 6° 36' W Click for more
1373186 CTD/STD cast 2014-08-10 12:04Z 51° 9' N, 6° 36' W Click for more
1373198 CTD/STD cast 2014-08-10 12:59Z 51° 9' N, 6° 36' W Click for more
1373205 CTD/STD cast 2014-08-10 13:59Z 51° 9' N, 6° 36' W Click for more
1373217 CTD/STD cast 2014-08-10 15:08Z 51° 9' N, 6° 36' W Click for more
1373229 CTD/STD cast 2014-08-10 16:10Z 51° 9' N, 6° 36' W Click for more
1373230 CTD/STD cast 2014-08-10 17:00Z 51° 9' N, 6° 36' W Click for more
1373242 CTD/STD cast 2014-08-10 17:57Z 51° 9' N, 6° 36' W Click for more
1373254 CTD/STD cast 2014-08-10 19:06Z 51° 9' N, 6° 36' W Click for more
1373266 CTD/STD cast 2014-08-11 10:58Z 51° 12' N, 6° 8' W Click for more
1373278 CTD/STD cast 2014-08-11 14:01Z 51° 12' N, 6° 8' W Click for more
1373291 CTD/STD cast 2014-08-12 07:00Z 51° 9' N, 6° 36' W Click for more
1373309 CTD/STD cast 2014-08-12 11:00Z 51° 8' N, 6° 37' W Click for more
1373310 CTD/STD cast 2014-08-12 13:26Z 51° 8' N, 6° 37' W Click for more
1373322 CTD/STD cast 2014-08-12 18:00Z 51° 8' N, 6° 37' W Click for more
1373334 CTD/STD cast 2014-08-13 11:00Z 51° 12' N, 6° 3' W Click for more
1759880 Multiple instrument types 2014-08-03 13:11Z to 2014-08-14 19:07Z 48° 12' N to 51° 19' N; 9° 53' W to 1° 17' W Click for more
1759892 Meteorological data logger 2014-08-03 13:11Z to 2014-08-14 19:07Z 48° 12' N to 51° 19' N; 9° 53' W to 1° 17' W Click for more
1759911 Single-beam echosounder 2014-08-03 13:11Z to 2014-08-14 19:07Z 48° 12' N to 51° 19' N; 9° 53' W to 1° 17' W Click for more

Project Database

# Events Gear Type Parameters Held
51 Unspecified zooplankton net or nets
44 Marine snow catcher
33 CTD frame plus rosette sampler Ammonium and ammonia concentration parameters in water bodies

Silicate concentration parameters in the water column
Alkalinity, acidity and pH of the water column
Salinity of the water column
Nitrate concentration parameters in the water column
Total dissolved inorganic carbon (TCO2) concentration in the water column
Nitrite concentration parameters in the water column
Phosphate concentration parameters in the water column
14 Box core
4 Stand-alone pumps
10 Drifting Buoy
2 Autonomous Underwater Vehicle deployment

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

References

Track Charts

No track charts currently available

Reports

Cruise Report

Cruise Report