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RRS Discovery D227
Cruise summary report
Cruise Info. | |
Ship name (ship code) | RRS Discovery (74E3) |
Cruise identifier | D227 |
Cruise period | 1997-04-15 — 1997-05-16 |
Status | Completed |
Port of departure | Vigo, Spain |
Port of return | Vigo, Spain |
Purpose | Research |
Objectives | To study bio-physical interactions, in the upper ocean, at the time of the spring bloom, using a combination of ship and satellite (OCTS, AVHRR) measurements.
Main tasks: 1) Large scale survey using Seasoar, vertical nets and light Seasoar 2) Repeat small scale surveys using Seasoar, CTD, vertical nets and light Seasoar 3) Sample zooplankton distribution using LHPR during small scale surveys 4) Repeat large scale survey using Seasoar |
Chief scientist | Meric Srokosz (Southampton Oceanography Centre) |
Cruise report | (0.80 MB) |
Ocean/sea areas | |
General | North East Atlantic Ocean (limit 40W) |
Specific | Eastern North Atlantic |
Track charts | |
Measurements | |
Physical oceanography | |
Surface measurements underway (T,S) | Quantity: track kilometres = 9260 Description: Underway T, S and fluorescence measurements (pumped water) |
Water bottle stations | Quantity: number of stations = 42 Description: FSI water bottles (15 x 20 ltr) on upcasts at each CTD station. Samples taken for oxygen, salinity, nutrients, chlorophyll, primary production (only some stations), phytoplankton, pigments |
CTD stations | Quantity: number of stations = 42 Description: CTD casts with oxygen and nutrient sensors, and transmissometer |
Subsurface temperature and salinity measurements | Quantity: track kilometres = 4630 Description: Underway Seasoar measurements (to 300m) - CTD, fluorometer, OPC (optical plankton counter) and PAR |
Transparency (eg transmissometer) | Quantity: number of stations = 42 Description: CTD casts with oxygen and nutrient sensors, and transmissometer |
Optics (eg underwater light levels) | Quantity: number of stations = 23 Description: S. Atlantic sensor rig dips (to 60m) for optical properties |
Optics (eg underwater light levels) | Quantity: track kilometres = 926 Description: Underway lightfish measurements (at approximately 3m) of optical properties |
Optics (eg underwater light levels) | Quantity: track kilometres = 4630 Description: Underway Seasoar measurements (to 300m) - CTD, fluorometer, OPC (optical plankton counter) and PAR |
Current profiler (eg ADCP) | Quantity: track kilometres = 9260 Description: Underway current profiling using RDI ADCP (to 400m) |
Instrumented wave measurements | Quantity: track kilometres = 9260 Description: Underway meteorological observations/measurements - wind velocity, wind stress, short and long wave radiation, PAR, radiometric SST, humidity, wave height |
Chemical oceanography | |
Oxygen | Quantity: number of stations = 42 Description: CTD casts with oxygen and nutrient sensors, and transmissometer |
Oxygen | Quantity: number of stations = 42 Description: FSI water bottles (15 x 20 ltr) on upcasts at each CTD station. Samples taken for oxygen, salinity, nutrients, chlorophyll, primary production (only some stations), phytoplankton, pigments |
Phosphate | Quantity: number of stations = 42 Description: FSI water bottles (15 x 20 ltr) on upcasts at each CTD station. Samples taken for oxygen, salinity, nutrients, chlorophyll, primary production (only some stations), phytoplankton, pigments |
Phosphate | Quantity: number of stations = 42 Description: CTD casts with oxygen and nutrient sensors, and transmissometer |
Nitrate | Quantity: number of stations = 42 Description: FSI water bottles (15 x 20 ltr) on upcasts at each CTD station. Samples taken for oxygen, salinity, nutrients, chlorophyll, primary production (only some stations), phytoplankton, pigments |
Nitrate | Quantity: number of stations = 42 Description: CTD casts with oxygen and nutrient sensors, and transmissometer |
Silicate | Quantity: number of stations = 42 Description: FSI water bottles (15 x 20 ltr) on upcasts at each CTD station. Samples taken for oxygen, salinity, nutrients, chlorophyll, primary production (only some stations), phytoplankton, pigments |
Silicate | Quantity: number of stations = 42 Description: CTD casts with oxygen and nutrient sensors, and transmissometer |
Biology and fisheries | |
Primary productivity | Quantity: number of stations = 42 Description: FSI water bottles (15 x 20 ltr) on upcasts at each CTD station. Samples taken for oxygen, salinity, nutrients, chlorophyll, primary production (only some stations), phytoplankton, pigments |
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: track kilometres = 9260 Description: Underway T, S and fluorescence measurements (pumped water) |
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of stations = 42 Description: FSI water bottles (15 x 20 ltr) on upcasts at each CTD station. Samples taken for oxygen, salinity, nutrients, chlorophyll, primary production (only some stations), phytoplankton, pigments |
Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: track kilometres = 4630 Description: Underway Seasoar measurements (to 300m) - CTD, fluorometer, OPC (optical plankton counter) and PAR |
Phytoplankton | Quantity: number of stations = 42 Description: FSI water bottles (15 x 20 ltr) on upcasts at each CTD station. Samples taken for oxygen, salinity, nutrients, chlorophyll, primary production (only some stations), phytoplankton, pigments |
Zooplankton | Quantity: track kilometres = 4630 Description: Underway Seasoar measurements (to 300m) - CTD, fluorometer, OPC (optical plankton counter) and PAR |
Zooplankton | Quantity: number of hauls = 22 Description: Vertical nets (to 200m) for zooplankton |
Meteorology | |
Upper air observations | Quantity: number of deployments = 26 Description: Radiosonde ascents |
Incident radiation | Quantity: track kilometres = 9260 Description: Underway meteorological observations/measurements - wind velocity, wind stress, short and long wave radiation, PAR, radiometric SST, humidity, wave height |
Routine standard measurements | Quantity: track kilometres = 9260 Description: Underway meteorological observations/measurements - wind velocity, wind stress, short and long wave radiation, PAR, radiometric SST, humidity, wave height |
Other meteorological measurements | Quantity: track kilometres = 9260 Description: Underway meteorological observations/measurements - wind velocity, wind stress, short and long wave radiation, PAR, radiometric SST, humidity, wave height |
Data held at BODC | |
Discrete samples | |
38 CTD frame plus rosette sampler | Transmittance and attenuance of the water column Temperature of the water column Dissolved oxygen parameters in the water column Salinity of the water column Chlorophyll pigment concentrations in water bodies |