Menai Strait turbidity and other co-variate surveillance
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.
- Identification
- Extent
- Distribution
- Quality
- Keywords
- Spatial Reference System
- Content
- Constraints
- Maintenance
- Metadata
Identification
- Identifier
- NRW_DS87115
- Alternative Title
-
- Gwylio cymylogrwydd a chydamrywiannau eraill yn y Fenai
- Marine Monitoring Report No. 22
- Metadata Language
- English
- Lineage
-
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.
- Dataset Reference Date (Publication)
- 2006-02-28
Extent
Extent
- Geographic Extent
- Wales (WLS)
))
Vertical Extent
- Medin Extent Keyword
- water column
Distribution
- Format Type and Description
-
-
Documents
()
- Specification
-
Dataset is comprised of a series of Excel spreadsheets: CTD calibration data files, CTD and Meteorological data daily averages compiled for 2004 and 2005. Hourly averaged CTD data for 2003, 2004, 2005. Raw Meterological data for 2004 and 2005. Raw CTD data for 2003, 2004, 2005
-
Documents
()
Quality
Data quality
- Quality Scope
- Dataset
- Lineage
-
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.
Keywords
Keywords
- Type
- Theme
Citation
- Date (Publication)
- 2008-06-01
Keywords
Keywords
- SeaDataNet Parameter Discovery Vocabulary
-
- Habitat characterisation
- Temperature of the water column
- Salinity of the water column
- Type
- Theme
Citation
- Date (Revision)
- 2021-01-06
Spatial Reference System
Content
Content Information
NRW Profile
Custom Elements
- NRW Related Title
-
Menai Strait turbidity and other co-variate surveillance
Constraints
Constraints
Limitations on Public Access and Use
- Restriction type
- Other restrictions
Access Constraints Directive
- Limitations
- no limitations
Access Constraints Text
- Other constraints
-
There are no access restrictions on this data. NRW may release, publish or disseminate it freely.
Use Constraints
- Use constraints type
- Other restrictions
- Other constraints
-
© 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.
Metadata
Metadata
- File Identifier
- 4f4c4942-4343-5764-6473-3837313135 XML
- Metadata Language
- English
- Resource type
- Dataset
- Metadata Date
- 2024-12-09T14:38:18.856Z
- Metadata Standard Name
- NRW
- Metadata Standard Version
-
1.0