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Metadata: Water column profiles from offshore locations around St Helena Island between December 2017 and September 2019
Abstract:
The dataset comprises of vertical profiles of water column properties (temperature, salinity, conductivity, pressure, depth, sound velocity and density) of the upper ocean (up to 500m) from 6 locations around St Helena Island. The locations were repeat sampled monthly over 22 months between December 2017 and September 2019, with opportunistic profiles taken from the two main seamounts (Bonaparte and Cardno complex) and the surrounding open ocean. Each individual cast, with up and down profiles, is contained in a separate .csv file. The file naming follows this schema: YYYYMM_stationname. An additional .csv file is provided with details of each serial number and CTD cast (with date, station names also included). Data have been gathered using a Valeport mini CTD (with a passive flow induction cell, Platinum Resistance Thermometer and a strain gauge transducer) and extracted using Valeport DataLogX2 software (version1.0.4.1270). The CTDs were deployed using vertical deployment from a 12m vessel and were hand hauled. No calibration has been applied when using the Valeport mini-CTD with acetal housing and have been supplied to BODC in raw format. The surveyors have been dependent on the sensor calibrations applied by the CTD manufacturer (Valeport). The data have been collected in the framework of the Darwin PLUS Initiative project 'Oceanographic influences on the St Helena pelagic ecosystem' (reference number 070). The data collection activities were carried out by the Government of St Helena with additional collaboration from the British Antarctic Survey (BAS), the Centre for Environment, Fisheries and Aquaculture Science (Cefas), and the International Commission for the Conservation of Atlantic Tunas (ICCAT). As part of the blue-belt initiative, St Helena was planning to declare a Category VI Sustainable use MPA in the entire maritime zone in early 2017. A key-part of ensuring sustainability is to understand the pelagic ecosystem and how seasonal or long-term changes in that system will impact the abundance and distribution of the whale sharks and fish on which the economy of the island depends. The Darwin project wanted to address key priorities including (i) improving conservation and management of the marine environment (ii) developing ecosystem approaches to marine management (iii) promoting sustainable fisheries and (iv) developing data systems on biodiversity.
Data holder:
British Oceanographic Data Centre
| Other details | ||
| Internal code | Internally assigned metadata identifier | 7639 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | Water column profiles from offshore locations around St Helena Island between December 2017 and September 2019 |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | British Oceanographic Data Centre record 1048_St_Helena_CTDs |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | 2aeec93007695e679162e838174f8b14 |
| Resource Identifier | This is the code assigned by the data owner. | EDMED6994 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2017-12-19 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2019-09-25 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | inapplicable |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | asNeeded |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | The dataset comprises of vertical profiles of water column properties (temperature, salinity, conductivity, pressure, depth, sound velocity and density) of the upper ocean (up to 500m) from 6 locations around St Helena Island. The locations were repeat sampled monthly over 22 months between December 2017 and September 2019, with opportunistic profiles taken from the two main seamounts (Bonaparte and Cardno complex) and the surrounding open ocean. Each individual cast, with up and down profiles, is contained in a separate .csv file. The file naming follows this schema: YYYYMM_stationname. An additional .csv file is provided with details of each serial number and CTD cast (with date, station names also included). Data have been gathered using a Valeport mini CTD (with a passive flow induction cell, Platinum Resistance Thermometer and a strain gauge transducer) and extracted using Valeport DataLogX2 software (version1.0.4.1270). The CTDs were deployed using vertical deployment from a 12m vessel and were hand hauled. No calibration has been applied when using the Valeport mini-CTD with acetal housing and have been supplied to BODC in raw format. The surveyors have been dependent on the sensor calibrations applied by the CTD manufacturer (Valeport). The data have been collected in the framework of the Darwin PLUS Initiative project 'Oceanographic influences on the St Helena pelagic ecosystem' (reference number 070). The data collection activities were carried out by the Government of St Helena with additional collaboration from the British Antarctic Survey (BAS), the Centre for Environment, Fisheries and Aquaculture Science (Cefas), and the International Commission for the Conservation of Atlantic Tunas (ICCAT). As part of the blue-belt initiative, St Helena was planning to declare a Category VI Sustainable use MPA in the entire maritime zone in early 2017. A key-part of ensuring sustainability is to understand the pelagic ecosystem and how seasonal or long-term changes in that system will impact the abundance and distribution of the whale sharks and fish on which the economy of the island depends. The Darwin project wanted to address key priorities including (i) improving conservation and management of the marine environment (ii) developing ecosystem approaches to marine management (iii) promoting sustainable fisheries and (iv) developing data systems on biodiversity. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | This dataset was created by scientists at the Government of St Helena as part of a Darwin PLUS Initiative project titled “Oceanographic influences on the St Helena pelagic ecosystem” (ref number 070), following their in-house data processing and quality control procedures. The data were then provided to the British Oceanographic Data Centre (BODC) for archival and discoverability. No data quality or data processing procedures were applied by BODC.Instrument(s) used to collect data: CTD. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Salinity of the water column |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Electrical conductivity of the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Temperature of the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Sound velocity and travel time in the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Density of the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Oceanographic geographical features | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | unknown | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Marine Environmental Data and Information Network | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Natural Environment Research Council Designated Data Centres | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | -12.55 |
| East | The eastern-most limit of the data resource in decimal degrees | -2.18 |
| South | The southern-most limit of the data resource in decimal degrees | -19.38 |
| West | The western-most limit of the data resource in decimal degrees | -9.23 |
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | British Oceanographic Data Centre | |
| Individual name | Polly Hadžiabdic | |
| Position name | Head of the BODC Requests Team | |
| Delivery point | Joseph Proudman Building, 6 Brownlow Street | |
| Postal code | L3 5DA | |
| City | Liverpool | |
| Administrative area | Merseyside | |
| Country | United Kingdom | |
| enquiries@bodc.ac.uk | ||
| URL | https://www.bodc.ac.uk/ | |
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | South Atlantic Environmental Research Institute | |
| Individual name | Unknown | |
| Position name | Unknown | |
| Delivery point | PO Box 609, Stanley Cottage | |
| Postal code | FIQQ 1ZZ | |
| City | Stanley | |
| Country | Falkland Islands (Malvinas) | |
| info@saeri.ac.fk | ||
| URL | https://www.south-atlantic-research.org | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | South Atlantic Environmental Research Institute | |
| Individual name | Unknown | |
| Position name | Unknown | |
| Delivery point | PO Box 609, Stanley Cottage | |
| Postal code | FIQQ 1ZZ | |
| City | Stanley | |
| Country | Falkland Islands (Malvinas) | |
| info@saeri.ac.fk | ||
| URL | https://www.south-atlantic-research.org | |
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | British Oceanographic Data Centre | |
| Position name | Director | |
| Delivery point | Joseph Proudman Building, 6 Brownlow Street | |
| Postal code | L3 5DA | |
| City | Liverpool | |
| Administrative area | Merseyside | |
| Country | United Kingdom | |
| enquiries@bodc.ac.uk | ||
| URL | https://www.bodc.ac.uk/ | |
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | British Oceanographic Data Centre | |
| Position name | Director | |
| Delivery point | Joseph Proudman Building, 6 Brownlow Street | |
| Postal code | L3 5DA | |
| City | Liverpool | |
| Administrative area | Merseyside | |
| Country | United Kingdom | |
| enquiries@bodc.ac.uk | ||
| URL | https://www.bodc.ac.uk/ | |
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://www.bodc.ac.uk/about/contact_us/contact_details/ |
| Locator name | Name of the web resource | Enquiries contact details |
| Locator function | Code that describes the function of the resource. ISO function code chosen from ISO 19115-1 Codelist | offlineAccess |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | No limitations apply | |
| This states any limitations on access to the data. Multiple occurences are allowed here. One entry shall be from the INSPIRE Metadata registry and the other free text should be part of the resource `Have specific limitations`. | Data are only available on the basis of case-by-case negotiation for usage | |
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | Usage restrictions are specified in the terms of the licence |
| Available data formats | ||
| Data format | Format in which digital data can be provided for transfer | Delimited |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2022-03-02 |
| Date of last revision | The most recent date that the resource was revised. | 2026-03-17 |
| Date of creation | The date that the resource was created. | 2020-01-28 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-12 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-03-17 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.2 |