RRS James Cook JC150 (GApr08, ZIPLOC)
Cruise summary report
| Cruise Info. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ship name (ship code) | RRS James Cook (740H) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cruise identifier | JC150 (GApr08, ZIPLOC) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cruise period | 2017-06-25 — 2017-08-12 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Status | Completed | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Port of departure | Pointe-à-Pitre, Guadeloupe | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Port of return | Santa Cruz de Tenerife, Spain | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Purpose | Research | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Objectives | Recent work by our team and others have demonstrated that the availability of the trace metals, specifically zinc and iron that regulate the biological uptake of dissolved organic phosphorus (DOP) when inorganic phosphate is limiting. At present, on-going ocean warming is predicted to reduce the physical supply of essential nutrients, nitrate and phosphate, and hence control future trends in the productivity of subtropical gyres. This view ignores the significant additions of nitrogen to the subtropical ocean from both natural and anthropogenic activity that decouple nitrate and phosphate, causing phosphate stress for phytoplankton. This will drive an 'arms race' towards accessing alternative forms of phosphorus. The current view is that the problem of phosphate limitation in the ocean is largely solved by phytoplankton groups producing enzymes called alkaline phosphatases (AP) to access phosphate from DOP. We hypothesize that AP activity can be restricted by inadequate supply of zinc and/or iron, which would exacerbate phosphate limitation by limiting access to DOP. If zinc and iron limitation of these alternate phosphorus pools are widespread, this suggests the predictions of future trends in biological activity are inaccurate. By combining novel observational and modelling experiments we will gain a more complete quantitative understanding of how trace metals regulate phosphorus acquisition and thus biological activity in the contemporary and future ocean. In doing so, we will challenge the current view of the drivers of long-term trends in the productivity of the subtropical ocean. Due to their spatial extent this will have far reaching impacts on the cycling of carbon, oxygen and nutrients in the world ocean.
Aims 1. Determine the prevalence of zinc and iron limitation of APA in the phosphate deplete subtropical North Atlantic ocean 2. Quantify the impact of zinc-phosphorus and iron-phosphorus co-limitation on biological activity, specifically phytoplankton growth, primary production and nitrogen fixation 3. Quantify the significance of zinc-phosphorus and iron-phosphorus co-limitation in driving phytoplankton productivity over basin scales and multi-decadal time scales | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Chief scientist | Claire Mahaffey (University of Liverpool Department of Earth, Ocean and Ecological Sciences) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Coordinating body | Natural Environment Research Council (NERC) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Cruise report |  (31.35 MB) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ocean/sea areas | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| General | North Atlantic Ocean | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Specific | Tropical Atlantic | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Measurements | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Physical oceanography | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| CTD stations | Quantity: number of profiles = 6 Description: Vertical profiles of oxygen | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| CTD stations | Quantity: number of profiles = 7 Description: Vertical profiles of dissolved organic phosphorus (DOP), 8-12 discrete depths, analysis by persulphate oxidation. Vertical profiles of chlorophyll a concentrations. Vertical profiles of rates of alkaline phosphatase activity. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Chemical oceanography | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Oxygen | Quantity: number of profiles = 6 Description: Vertical profiles of oxygen | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phosphate | Quantity: number of experiments = 8 Description: Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium. Dissolved Silicate. Chlorophyll a. Samples for phytoplankton community structure by flow cytometry analysis. DNA samples for microarray analysis | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phosphate | Quantity: number of experiments = 122 Description: 122 discrete samples along transect of 1846 nautical miles for the following: Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phosphate | Quantity: number of experiments = 4 Description: Samples for Iron 59 Incubation experiments. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phosphate | Quantity: number of experiments = 7 Description: 306 discrete samples for Whole Community Nutrient additions. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phosphate | Quantity: number of experiments = 9 Description: Samples from ZIPLOc Incubation experiments. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phosphate | Quantity: number of experiments = 10 Description: Samples from ZIPLOc Incubation experiments. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phosphate | Quantity: number of profiles = 15 Description: Vertical depth profiles of Dissolved Phosphate. Vertical depth profiles of Dissolved Nitrate | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrate | Quantity: number of experiments = 9 Description: Samples from ZIPLOc Incubation experiments. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrate | Quantity: number of experiments = 8 Description: Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium. Dissolved Silicate. Chlorophyll a. Samples for phytoplankton community structure by flow cytometry analysis. DNA samples for microarray analysis | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrate | Quantity: number of experiments = 10 Description: Samples from ZIPLOc Incubation experiments. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrate | Quantity: number of profiles = 15 Description: Vertical depth profiles of Dissolved Phosphate. Vertical depth profiles of Dissolved Nitrate | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrate | Quantity: number of experiments = 122 Description: 122 discrete samples along transect of 1846 nautical miles for the following: Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrate | Quantity: number of experiments = 7 Description: 306 discrete samples for Whole Community Nutrient additions. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrate | Quantity: number of experiments = 4 Description: Samples for Iron 59 Incubation experiments. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrite | Quantity: number of profiles = 15 Description: Vertical depth profiles of Dissolved Phosphate. Vertical depth profiles of Dissolved Nitrate | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrite | Quantity: number of experiments = 122 Description: 122 discrete samples along transect of 1846 nautical miles for the following: Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrite | Quantity: number of experiments = 9 Description: Samples from ZIPLOc Incubation experiments. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrite | Quantity: number of experiments = 7 Description: 306 discrete samples for Whole Community Nutrient additions. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrite | Quantity: number of experiments = 8 Description: Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium. Dissolved Silicate. Chlorophyll a. Samples for phytoplankton community structure by flow cytometry analysis. DNA samples for microarray analysis | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrite | Quantity: number of experiments = 10 Description: Samples from ZIPLOc Incubation experiments. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Nitrite | Quantity: number of experiments = 4 Description: Samples for Iron 59 Incubation experiments. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ammonia | Quantity: number of experiments = 122 Description: 122 discrete samples along transect of 1846 nautical miles for the following: Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ammonia | Quantity: number of experiments = 8 Description: Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium. Dissolved Silicate. Chlorophyll a. Samples for phytoplankton community structure by flow cytometry analysis. DNA samples for microarray analysis | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ammonia | Quantity: number of experiments = 9 Description: Samples from ZIPLOc Incubation experiments. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ammonia | Quantity: number of experiments = 10 Description: Samples from ZIPLOc Incubation experiments. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ammonia | Quantity: number of experiments = 4 Description: Samples for Iron 59 Incubation experiments. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ammonia | Quantity: number of experiments = 7 Description: 306 discrete samples for Whole Community Nutrient additions. Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ammonia | Quantity: number of profiles = 15 Description: Vertical depth profiles of Dissolved Phosphate. Vertical depth profiles of Dissolved Nitrate | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Silicate | Quantity: number of experiments = 8 Description: Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium. Dissolved Silicate. Chlorophyll a. Samples for phytoplankton community structure by flow cytometry analysis. DNA samples for microarray analysis | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Silicate | Quantity: number of profiles = 15 Description: Vertical depth profiles of Dissolved Phosphate. Vertical depth profiles of Dissolved Nitrate | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Trace elements | Quantity: number of experiments = 65 Description: Total dissolvable iron and zinc. Analyses by flow injection. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Trace elements | Quantity: number of profiles = 14 Description: Vertical profiles of dissolved iron and zinc, 24 samples per CTD. Analyses by flow Injection. Vertical profiles of total dissolvable iron and zinc, 12 samples per CTD. Analyses by flow Injection. Vertical profiles of soluble iron, 12 samples per CTD, analyses by flow injection. . Vertical profiles of particulate trace metals, 8 samples per CTD. Analyses by acid digestion followed by ICP-MS detection. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Trace elements | Quantity: number of experiments = 129 Description: Dissolved iron and zinc, Analyses by flow Injection. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Trace elements | Quantity: number of experiments = 4 Description: Dissolved iron (20 discrete samples per experiment). Soluble iron (20 discrete samples per experiment). Total dissolvable (20 discrete samples per experiment) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Trace elements | Quantity: number of experiments = 9 Description: Dissolved iron and zinc (21-36 discrete samples per experiment. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Isotopes | Quantity: number of profiles = 3 Description: Vertical profiles of dissolved zinc and chromium isotopes, analyses by MC-ICP-MS. 12 samples from each CTD | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Biology and fisheries | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Primary productivity | Quantity: number of stations = 7 Description: Trichodesmium colony abundance from 15m, 20 discrete samples | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of experiments = 8 Description: Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium. Dissolved Silicate. Chlorophyll a. Samples for phytoplankton community structure by flow cytometry analysis. DNA samples for microarray analysis | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of profiles = 7 Description: Vertical profiles of dissolved organic phosphorus (DOP), 8-12 discrete depths, analysis by persulphate oxidation. Vertical profiles of chlorophyll a concentrations. Vertical profiles of rates of alkaline phosphatase activity. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of experiments = 9 Description: Dissolved organic phosphorus (DOP) (21 to 36 discrete samples per experiment). Chlorophyll a (21 to 36 discrete samples per experiment). Samples for phytoplankton community structure by flow cytometry analysis. (21 to 36 discrete samples per experiment). Rates of alkaline phosphatase activity (21 to 36 discrete samples per experiment). Rates of nitrogen fixation (21 to 36 discrete samples per experiment). | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of samples = 129 Description: 129 discrete samples along transect of 1846 nm for the following: Dissolved organic phosphorus (DOP) analysis by persulphate oxidation. Chlorophyll a. Samples for phytoplankton community structure by flow cytometry analysis. Rates of alkaline phosphatase activity. Rates of nitrogen fixation (samples taken once per day, 7 samples only) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: track kilometres = 3300 Description: Approx 1800 nm of continuouos fluoresence measurements using FRRF | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of experiments = 10 Description: Chlorophyll a (60 to 80 discrete samples per experiment). Rates of alkaline phosphatase activity (60 to 80 discrete samples per experiment) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Dissolved organic matter (inc DOC) | Quantity: number of samples = 129 Description: 129 discrete samples along transect of 1846 nm for the following: Dissolved organic phosphorus (DOP) analysis by persulphate oxidation. Chlorophyll a. Samples for phytoplankton community structure by flow cytometry analysis. Rates of alkaline phosphatase activity. Rates of nitrogen fixation (samples taken once per day, 7 samples only) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Dissolved organic matter (inc DOC) | Quantity: number of experiments = 9 Description: Dissolved organic phosphorus (DOP) (21 to 36 discrete samples per experiment). Chlorophyll a (21 to 36 discrete samples per experiment). Samples for phytoplankton community structure by flow cytometry analysis. (21 to 36 discrete samples per experiment). Rates of alkaline phosphatase activity (21 to 36 discrete samples per experiment). Rates of nitrogen fixation (21 to 36 discrete samples per experiment). | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Dissolved organic matter (inc DOC) | Quantity: number of profiles = 7 Description: Vertical profiles of dissolved organic phosphorus (DOP), 8-12 discrete depths, analysis by persulphate oxidation. Vertical profiles of chlorophyll a concentrations. Vertical profiles of rates of alkaline phosphatase activity. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Biochemical measurements (eg lipids, amino acids) | Quantity: number of track lines = 7 Description: 120 discrete samples from FISH and underway system for nucleic acid analysis | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Biochemical measurements (eg lipids, amino acids) | Quantity: number of track lines = 7 Description: Diel underway sampling, nucleic acid analysis, 183 discrete samples | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Biochemical measurements (eg lipids, amino acids) | Quantity: number of stations = 7 Description: Trichodesmium colonies from nutrient incubations, 345 discrete samples | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Biochemical measurements (eg lipids, amino acids) | Quantity: number of experiments = 7 Description: Whole water samples for nucleic acid analyses (experiment D), 224 discrete samples | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Biochemical measurements (eg lipids, amino acids) | Quantity: number of stations = 7 Description: Trichodesmium diel sampling, 324 discrete samples | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phytoplankton | Quantity: number of samples = 129 Description: 129 discrete samples along transect of 1846 nm for the following: Dissolved organic phosphorus (DOP) analysis by persulphate oxidation. Chlorophyll a. Samples for phytoplankton community structure by flow cytometry analysis. Rates of alkaline phosphatase activity. Rates of nitrogen fixation (samples taken once per day, 7 samples only) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phytoplankton | Quantity: number of experiments = 8 Description: Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium. Dissolved Silicate. Chlorophyll a. Samples for phytoplankton community structure by flow cytometry analysis. DNA samples for microarray analysis | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Phytoplankton | Quantity: number of experiments = 9 Description: Dissolved organic phosphorus (DOP) (21 to 36 discrete samples per experiment). Chlorophyll a (21 to 36 discrete samples per experiment). Samples for phytoplankton community structure by flow cytometry analysis. (21 to 36 discrete samples per experiment). Rates of alkaline phosphatase activity (21 to 36 discrete samples per experiment). Rates of nitrogen fixation (21 to 36 discrete samples per experiment). | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other biological/fisheries measurement | Quantity: number of experiments = 8 Description: Dissolved Phosphate. Dissolved Nitrate. Dissolved Nitrite. Dissolved Ammonium. Dissolved Silicate. Chlorophyll a. Samples for phytoplankton community structure by flow cytometry analysis. DNA samples for microarray analysis | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other biological/fisheries measurement | Quantity: number of samples = 129 Description: 129 discrete samples along transect of 1846 nm for the following: Dissolved organic phosphorus (DOP) analysis by persulphate oxidation. Chlorophyll a. Samples for phytoplankton community structure by flow cytometry analysis. Rates of alkaline phosphatase activity. Rates of nitrogen fixation (samples taken once per day, 7 samples only) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other biological/fisheries measurement | Quantity: number of experiments = 9 Description: Dissolved organic phosphorus (DOP) (21 to 36 discrete samples per experiment). Chlorophyll a (21 to 36 discrete samples per experiment). Samples for phytoplankton community structure by flow cytometry analysis. (21 to 36 discrete samples per experiment). Rates of alkaline phosphatase activity (21 to 36 discrete samples per experiment). Rates of nitrogen fixation (21 to 36 discrete samples per experiment). | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other biological/fisheries measurement | Quantity: number of profiles = 7 Description: Vertical profiles of dissolved organic phosphorus (DOP), 8-12 discrete depths, analysis by persulphate oxidation. Vertical profiles of chlorophyll a concentrations. Vertical profiles of rates of alkaline phosphatase activity. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other biological/fisheries measurement | Quantity: number of experiments = 10 Description: Chlorophyll a (60 to 80 discrete samples per experiment). Rates of alkaline phosphatase activity (60 to 80 discrete samples per experiment) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Data held at BODC | Get data | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Series/Profiles | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1 | Visible waveband radiance and irradiance measurements in the atmosphere Horizontal spatial co-ordinates Air pressure Date and time Wind strength and direction Raw light meter output Air temperature Solar Radiation Atmospheric humidity Visible waveband radiance and irradiance measurements in the atmosphere Horizontal spatial co-ordinates Air pressure Date and time Wind strength and direction Raw light meter output Air temperature Solar Radiation Atmospheric humidity
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1 | Horizontal spatial co-ordinates Date and time Platform or instrument orientation Horizontal platform movement Bathymetry and Elevation Horizontal spatial co-ordinates Date and time Platform or instrument orientation Horizontal platform movement Bathymetry and Elevation
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 3 | Horizontal spatial co-ordinates Dissolved total or organic phosphorus concentration in the water column Date and time Total metal concentrations in water bodies Phytoplankton taxonomic abundance in water bodies Bacteria generic abundance in water bodies Plankton abundance per unit volume of the water column Dissolved metal concentrations in the water column Horizontal spatial co-ordinates Dissolved total or organic phosphorus concentration in the water column Date and time Total metal concentrations in water bodies Phytoplankton taxonomic abundance in water bodies Bacteria generic abundance in water bodies Plankton abundance per unit volume of the water column Dissolved metal concentrations in the water column
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 22 | Reference numbers Dissolved total or organic phosphorus concentration in the water column Total metal concentrations in water bodies Vertical spatial coordinates Dissolved metal concentrations in the water column Quality control flags Reference numbers Dissolved total or organic phosphorus concentration in the water column Total metal concentrations in water bodies Vertical spatial coordinates Dissolved metal concentrations in the water column Quality control flags
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 1 | Chlorophyll pigment concentrations in water bodies Horizontal spatial co-ordinates Transmittance and attenuance of the water column Date and time Salinity of the water column Temperature of the water column Raw fluorometer output Metadata parameters Raw suspended particulate material concentration sensor output Electrical conductivity of the water column Chlorophyll pigment concentrations in water bodies Horizontal spatial co-ordinates Transmittance and attenuance of the water column Date and time Salinity of the water column Temperature of the water column Raw fluorometer output Metadata parameters Raw suspended particulate material concentration sensor output Electrical conductivity of the water column
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Discrete samples | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 129 All plastic clean surface pumped supply | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 19 CTD frame plus rosette sampler | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 65 Sample taken from ship's non-toxic supply | Salinity of the water column | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 35 |
