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Metadata: Menai Strait turbidity and other co-variate surveillance
Abstract:
The Menai Strait, separating the Isle of Anglesey from the north coast of Wales is part of the Menai Strait and Conwy Bay Special Area of Conservation. Monitoring of physical parameters in the strait, including water turbidity, has been carried out on a sporadic basis for the past 40 years. These parameters are of importance to the biological communities for which the Menai Strait and Conwy Bay has been designated and help to inform assessments of the condition of those communities and the effectiveness of management measures to conserve them. The observations of physical parameters in the strait have shown large, long-term fluctuations in turbidity. The aim of this project was to establish an automatic system for continuous monitoring of water turbidity, and other relevant physical parameters including temperature, salinity and meteorological variables.
Data holder:
Natural Resources Wales (NRW)
Click on the red button for resource contact details:
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| Other details | ||
| Internal code | Internally assigned metadata identifier | 8899 |
| 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. | Menai Strait turbidity and other co-variate surveillance |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Marine Monitoring Report No. 22 |
| 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. | NRW_DS87115 |
| Resource Identifier | This is the code assigned by the data owner. | 4f4c4942-4343-5764-6473-3837313135 |
| 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 | 2003-03-01 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2005-12-31 |
| 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. | The Menai Strait, separating the Isle of Anglesey from the north coast of Wales is part of the Menai Strait and Conwy Bay Special Area of Conservation. Monitoring of physical parameters in the strait, including water turbidity, has been carried out on a sporadic basis for the past 40 years. These parameters are of importance to the biological communities for which the Menai Strait and Conwy Bay has been designated and help to inform assessments of the condition of those communities and the effectiveness of management measures to conserve them. The observations of physical parameters in the strait have shown large, long-term fluctuations in turbidity. The aim of this project was to establish an automatic system for continuous monitoring of water turbidity, and other relevant physical parameters including temperature, salinity and meteorological variables. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Using an automated system for continuous monitoring, water turbidity, temperature and salinity were measured, along with meteorological variables (wind speed and direction, wind gust speed, atmospheric pressure, air temperature, rainfall). A Conductivity Temperature Depth (CTD) sensor, fitted with Optical Backscatter (OBS) sensor measuring backscattered light at 880nm was used for oceanographic measurements. Weather stations in Menai Bridge and Caernarfon airport provided meteorological data. CTD monitoring was carried out at one fixed site at the Low Water Springs mark off the end of the rock jetty on Ynys Faelog in the Menai Strait. Meteorological data came from weather stations in Menai Bridge and Caernarfon airport. Automatically collected data was logged every 5 minutes. The recorded observations were collected from 2003-2005. Instrument calibration data is included, and described in detail in CCW Marine Monitoring Report No. 22. Secchi depth measurements have been made sporadically in the strait for the last 40 years (Lumb, 1989,1990; Birkett and Maggs, 2001, Kratzer et al., 2003). These show that there was a steady decrease in water clarity in the strait between the early 1960's and the early 1980's, but that since then, clarity has been improving so that Secchi depths are more or less back to the levels they were 40 years ago. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitats and biotopes |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | turbidity | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Menai Strait | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | salinity | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Habitat characterisation | |
| 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 | Temperature of the water column | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 53.30067802 |
| East | The eastern-most limit of the data resource in decimal degrees | -3.99212694 |
| South | The southern-most limit of the data resource in decimal degrees | 53.08895531 |
| West | The western-most limit of the data resource in decimal degrees | -4.40805377 |
| Regional sea | water column | |
| Wales (WLS) | ||
| 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 | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| 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 | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | University of Wales, Bangor. School of Ocean Sciences | |
| Delivery point | Bangor, Gwynedd, LL57 2DG | |
| oss011@bangor.ac.uk | ||
| URL | http://www.bangor.ac.uk | |
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | Natural Resources Wales (NRW) | |
| Delivery point | Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales | |
| enquiries@naturalresourceswales.gov.uk | ||
| URL | http://naturalresources.wales/?lang=en | |
| 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 | 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`. | There are no access restrictions on this data. NRW may release, publish or disseminate it freely. |
| no limitations | ||
| 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. | © CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose. |
| Available data formats | ||
| Data format | Format in which digital data can be provided for transfer | Documents |
| 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. | 2006-02-28 |
| 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. | 2026-03-03 |
| 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 |