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Metadata: Vanuatu Water Quality Dataset - CTD Profiles - 2016-2018
Abstract:
CTD depth profiles from a dataset supporting a baseline assessment of marine water quality around Vanuatu, South Pacific. As part of the Commonwealth Marine Economies Programme, water quality measurements were collected over three years in the coastal waters around the island of Efate, and on one occasion around the island of Tanna. Observations focus on Port Vila (Efate), which is the main urbanised area on the Island. Parameters included are: salinity, temperature, turbidity, light attenuation, dissolved oxygen, and chlorophyll (fluorescence) which represent part of a larger research program on water quality, human health and habitat mapping. Associated data can be found here: Devlin et al (2020). Vanuatu Water Quality Dataset - 2016-2018. Cefas, UK. V1. doi: `https://doi.org/10.14466/CefasDataHub.107`_ .. _`https://doi.org/10.14466/cefasdatahub.107`: https://doi.org/10.14466/CefasDataHub.107
Data holder:
Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 9755 |
| 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. | Vanuatu Water Quality Dataset - CTD Profiles - 2016-2018 |
| 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. | CEFAS5ca77f38-7e0c-4e0c-872f-e7ae8a10249f |
| Resource Identifier | This is the code assigned by the data owner. | CEFAS21509 |
| 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 | 2016-05-06 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2018-12-06 |
| 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'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | CTD depth profiles from a dataset supporting a baseline assessment of marine water quality around Vanuatu, South Pacific. As part of the Commonwealth Marine Economies Programme, water quality measurements were collected over three years in the coastal waters around the island of Efate, and on one occasion around the island of Tanna. Observations focus on Port Vila (Efate), which is the main urbanised area on the Island. Parameters included are: salinity, temperature, turbidity, light attenuation, dissolved oxygen, and chlorophyll (fluorescence) which represent part of a larger research program on water quality, human health and habitat mapping. Associated data can be found here: Devlin et al (2020). Vanuatu Water Quality Dataset - 2016-2018. Cefas, UK. V1. doi: `https://doi.org/10.14466/CefasDataHub.107`_ .. _`https://doi.org/10.14466/cefasdatahub.107`: https://doi.org/10.14466/CefasDataHub.107 |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Depth profiles were obtained using the Cefas ESM2 profiler for T1 and T2 (Sivyer et al., 2016), using an RBR Maestro3 for T6, and an RBR Concerto3 for T9 (RBR Ltd. Canada). Sensors equipped were as follows: FSI CT (ESM2; Falmouth Scientific Inc., USA) RBR Marine CT (Maestro and Concerto); Seapoint STM Turbidity (Seapoint Sensors Inc., USA; all profilers); Aanderaa 4330F Optode (Aanderaa Data Instruments AS, Norway; ESM2), RBRcodaODO|fast8 (Maestro) and RBRcodaT.ODO (Concerto) oxygen optodes; Seapoint (RBR) and Turner Cyclops (Turner Designs Inc., USA; Maestro) chlorophyll fluorometers and Li-Cor LI-192 PAR (LI-COR Biosciences USA; ESM2 and Maestro). Sensor data obtained from the Maestro CTDs were analysed using RBR Ruskin Desktop software and RBR’s RSKtools Matlab post-processing tool kit. Depth profiles were extracted in Matlab using the RSKtools package. Processing included: removing salinity spiking by calculating and applying a correction for the time-shift between conductivity and temperature sensors; recalculation of practical salinity and calculation of density anomaly (sigma0, presented here as ‘density’) using the integrated tools from the TOES-10 GSW toolbox; removing loops in profile ascent and descent (identified by reversed sensor velocity); and smoothing (boxcar) with a filter window of 3. Anomalous values at the top and bottom of profiles were manually removed for all channels, where present. Very high chlorophyll values at the bottom of the profiles were removed. While these may have been due to the sensor approaching high chlorophyll particles near the seafloor, they represented discontinuities from the rest of the profiles. All sensors were operated using their factory calibration. The oxygen sensor calibration was checked by pre-and post-survey two-point calibration, which while sub-optimal for these sensors (ideally be calibrated daily in-situ), provides a lower-precision overview of the oxygen conditions and a consistent picture across surveys. Ideally, calibration checks of the oxygen optode would have been carried out daily in the field. The values presented are therefore to be taken as approximate. Similarly, the factory calibration of the chlorophyll fluorescence sensor is not expected to be appropriate for the specific phytoplankton communities of the study area and data therefore indicate relative changes inchlorophyll only. Additional sampling site information and parameters determined from surface water samples are available at Devlin et al. (2020a). These data are presented in Devlin et al. (2020b). |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Coastal environment |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Monitoring | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Dissolved oxygen parameters in the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Light absorption in the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Optical backscatter | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Raw fluorometer output | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Raw oxygen sensor output | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Raw suspended particulate material optical sensor output | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Raw temperature and/or salinity instrument output | |
| 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 | Structure and stability 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 | Transmittance and attenuance of the water column | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Suspended particulate material | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Water column temperature and salinity | |
| 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 | Water column | |
| 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 | data.gov.uk | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | -10 |
| East | The eastern-most limit of the data resource in decimal degrees | 180 |
| South | The southern-most limit of the data resource in decimal degrees | -30 |
| West | The western-most limit of the data resource in decimal degrees | 160 |
| 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 | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| 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 | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) | |
| Delivery point | Cefas Lowestoft Laboratory, Pakefield Road | |
| Postal code | NR33 0HT | |
| City | Lowestoft | |
| Administrative area | Suffolk | |
| Country | UK | |
| data.manager@cefas.co.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Foreign, Commonwealth & Development Office (UK) | |
| information.rights@fcdo.gov.uk | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://data.cefas.co.uk/view/21509 |
| Locator name | Name of the web resource | Cefas Data Portal |
| 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 | noLimitations | |
| 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 | https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ | |
| 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. | 2022-09-23 |
| Date of last revision | The most recent date that the resource was revised. | 2024-07-24 |
| Date of creation | The date that the resource was created. | 2022-09-16 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2024-07-24 |
| 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 | 3.1.1 |