NRW_DS87115 eng dataset Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en pointOfContact 2026-03-03T16:06:51 MEDIN 3.1.2 wel eng utf8 British National Grid (EPSG::27700) Menai Strait turbidity and other co-variate surveillance Menai Strait turbidity and other co-variate surveillance Gwylio cymylogrwydd a chydamrywiannau eraill yn y Fenai Marine Monitoring Report No. 22 2006-02-28 publication 4f4c4942-4343-5764-6473-3837313135 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. 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. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en owner Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en custodian University of Wales, Bangor. School of Ocean Sciences Bangor, Gwynedd, LL57 2DG oss011@bangor.ac.uk http://www.bangor.ac.uk originator Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en distributor notPlanned Habitats and biotopes theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme turbidity Menai Strait salinity theme NRW Thesaurus 2025-01-08 publication geonetwork.thesaurus.local.theme.converted_nrw-keywords Habitat characterisation Salinity of the water column Temperature of the water column theme SeaDataNet Parameter Discovery Vocabulary 2024-06-19 publication geonetwork.thesaurus.external.theme.rdf+xml otherRestrictions There are no access restrictions on this data. NRW may release, publish or disseminate it freely. no limitations otherRestrictions © 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. vector eng utf8 oceans climatologyMeteorologyAtmosphere SeaVoX Vertical Co-ordinate Coverages 2021-01-06 revision water column NRW Geographic Identifiers Collection 2024-01-01 publication Wales (WLS) -4.40805377 -3.99212694 53.08895531 53.30067802 2003-03-01 2005-12-31 Documents 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 dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication This dataset has not been assessed for conformance to the referenced INSPIRE regulation. false 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. 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.