RRS Charles Darwin CD172
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RRS Charles Darwin (74AB) |
| Cruise identifier | CD172 |
| Cruise period | 2005-06-19 — 2005-07-09 |
| Status | Completed |
| Port of departure | Lisbon, Portugal |
| Port of return | Falmouth, United Kingdom |
| Purpose | Research |
| Objectives | The objective of the cruise was to improve our understanding of biochemical processes in the near-surface and microlayer of the ocean. We examine gradients in major nutrient concentrations and cycling, production and consumption of key biogases and variability in biological communities between micro-layer, near -surface and deeper water, and between productive and oligotrophic waters along a transect from offshore oligotrophic to coastal upwelling waters off western Spain and Portugal. We also aimed to examine the influence of gradients in physical, biological and photochemical processes at or near the surface micro-layer on the transport of heat and bio-gases across the air-sea interface. Using near-real time satellite imagery of ocean colour in combination with continuous underway measurements of sea surface temperature and chlorophyll fluorescence we identified a suitable oligotrophic site ~25nm off the coast just north of the spain/Portugal border, and reached it on 21 st June and commenced scientific work. We then worked our way inshore via 4 more stations to an upwelling site where science work was concluded on 6th July. The vessel then returned to Falmouth, arriving on 9th July. |
| Chief scientist | Chris Gallienne (Plymouth Marine Laboratory) |
| Project | PML Core Science Programme |
| Coordinating body | PML Directorate and Science Management Team |
| Cruise report |  (9.12 MB) |
| Ocean/sea areas | |
| General | Bay of Biscay North East Atlantic Ocean (limit 40W) |
| Specific | Iberian Upwelling off the Spanish/Portugese Coast. |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: activity duration in days = 20 Description: Surface underway T, S,c hlorophyll fluorescence from ships systems. |
| CTD stations | Quantity: number of profiles = 38 Description: CTD casts on daily basis (2-5 per day). |
| Transparency (eg transmissometer) | Quantity: number of profiles = 38 Description: Transmissometer profiles on each CTD cast |
| Optics (eg underwater light levels) | Quantity: number of profiles = 69 Description: Optical profiles of Irradiance, Reflectance, etc., (3-6 times daily) |
| Current profiler (eg ADCP) | Quantity: activity duration in days = 20 Description: Continuous measurements from ships hull-mounted ADCP |
| Other physical oceanographic measurements | Quantity: number of profiles = 45 Description: Self-contained autonomous micro-profiler (SCAMP) physical microstructure profiler |
| Chemical oceanography | |
| Oxygen | Quantity: number of profiles = 38 Description: Dissolved Oxygen profiles from CTD cast |
| Other dissolved gases | Quantity: number of samples = 11 Description: Garret Screen (GS) microlayer samples 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Other dissolved gases | Quantity: number of samples = 8 Description: Microlayer Sampling Device (MLSD) 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Other dissolved gases | Quantity: number of samples = 10 Description: Near-surface Sampling Device(NSSD) 8x4 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Total - P | Quantity: number of samples = 8 Description: Microlayer Sampling Device (MLSD) 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Total - P | Quantity: number of samples = 11 Description: Garret Screen (GS) microlayer samples 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Total - P | Quantity: number of samples = 10 Description: Near-surface Sampling Device(NSSD) 8x4 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Nitrate | Quantity: number of samples = 11 Description: Garret Screen (GS) microlayer samples 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Nitrate | Quantity: number of samples = 10 Description: Near-surface Sampling Device(NSSD) 8x4 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Nitrate | Quantity: number of samples = 8 Description: Microlayer Sampling Device (MLSD) 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Nitrite | Quantity: number of samples = 11 Description: Garret Screen (GS) microlayer samples 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Nitrite | Quantity: number of samples = 8 Description: Microlayer Sampling Device (MLSD) 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Nitrite | Quantity: number of samples = 10 Description: Near-surface Sampling Device(NSSD) 8x4 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Ammonia | Quantity: number of samples = 8 Description: Microlayer Sampling Device (MLSD) 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Ammonia | Quantity: number of samples = 11 Description: Garret Screen (GS) microlayer samples 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Ammonia | Quantity: number of samples = 10 Description: Near-surface Sampling Device(NSSD) 8x4 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Silicate | Quantity: number of samples = 10 Description: Near-surface Sampling Device(NSSD) 8x4 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Silicate | Quantity: number of samples = 8 Description: Microlayer Sampling Device (MLSD) 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Silicate | Quantity: number of samples = 11 Description: Garret Screen (GS) microlayer samples 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Biology and fisheries | |
| Primary productivity | Quantity: number of samples = 11 Description: Garret Screen (GS) microlayer samples 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Primary productivity | Quantity: number of samples = 8 Description: Microlayer Sampling Device (MLSD) 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Primary productivity | Quantity: number of samples = 10 Description: Near-surface Sampling Device(NSSD) 8x4 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of samples = 10 Description: Near-surface Sampling Device(NSSD) 8x4 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of samples = 8 Description: Microlayer Sampling Device (MLSD) 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of samples = 11 Description: Garret Screen (GS) microlayer samples 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Dissolved organic matter (inc DOC) | Quantity: number of samples = 11 Description: Garret Screen (GS) microlayer samples 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Dissolved organic matter (inc DOC) | Quantity: number of samples = 8 Description: Microlayer Sampling Device (MLSD) 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Dissolved organic matter (inc DOC) | Quantity: number of samples = 10 Description: Near-surface Sampling Device(NSSD) 8x4 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Phytoplankton | Quantity: number of samples = 8 Description: Microlayer Sampling Device (MLSD) 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Phytoplankton | Quantity: number of samples = 11 Description: Garret Screen (GS) microlayer samples 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Phytoplankton | Quantity: number of samples = 10 Description: Near-surface Sampling Device(NSSD) 8x4 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Zooplankton | Quantity: number of samples = 11 Description: Garret Screen (GS) microlayer samples 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Zooplankton | Quantity: number of samples = 10 Description: Near-surface Sampling Device(NSSD) 8x4 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Zooplankton | Quantity: number of samples = 8 Description: Microlayer Sampling Device (MLSD) 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Pelagic bacteria/micro-organisms | Quantity: number of samples = 8 Description: Microlayer Sampling Device (MLSD) 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Pelagic bacteria/micro-organisms | Quantity: number of samples = 10 Description: Near-surface Sampling Device(NSSD) 8x4 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Pelagic bacteria/micro-organisms | Quantity: number of samples = 11 Description: Garret Screen (GS) microlayer samples 1 x 2.7 litre samples for HPLC, Nutrients, Bacterial Productivity, Flow Cytometry, Pigments & Photoprotective compounds, Biogenic Gases & Microzooplankton microscopic Analysis |
| Data held at BODC | |
| Discrete samples | |
| 38 CTD frame plus rosette sampler | Transmittance and attenuance of the water column Salinity of the water column Temperature of the water column Dissolved oxygen parameters in the water column Visible waveband radiance and irradiance measurements in the water column Density of the water column Raw suspended particulate material concentration sensor output Electrical conductivity of the water column Chlorophyll pigment concentrations in water bodies |
| 24 Sample taken from ship's non-toxic supply |
