Keyword

Transmittance and attenuance of the water column

386 record(s)
 
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  • Categories  

    This dataset consists of underwater benthic imagery and measurements of light attenuation taken from Paluma Shoals in the Coral Sea following a 2016 El Niño coral bleaching event. Data were collected between 09 and 11 August 2016. Benthic imagery was captured using a SeaViewer Sea-Drop™ Camera (950 Analog model) on 10 August 2016. Light attenuation measurements were taken using a LiCOR LI-192SA Light Meter deployed at a range of depths below the sea surface. These cruises formed the field component of NERC Discovery Science project "Quantifying ENSO-related bleaching on nearshore, turbid-zone coral reefs grant story”. The data were collected following a major El Niño event which caused mass coral bleaching across the Great Barrier Reef. The event provided opportunity to undertake a rapid assessment of the impacts of bleaching on the turbid-zone reefs in the vicinity of Paluma Shoals (central Halifax Bay). The aim of the project is to ascertain: 1) The total extent of bleaching-induced mortality; 2) The extent to which specific coral species have been impacted; 3) Any immediate impacts on the structural complexity and diversity of the reefs. The Discovery Science project was composed of Standard Grant NE/P007694/1. The grant was held by the University of Exeter, School of Geography and led by Professor Christopher Perry. The funding period ran from 01 July 2016 to 31 March 2017. All data described have been received by BODC from the RRS James Clark Ross and will be processed and made available online in the future. Raw data are available on request. No further data are expected from this project.

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    The dataset comprises 42 hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, from across the Irish Sea and surrounding regions (Celtic Sea, St. George's Channel, North Channel and Clyde Sea) during June and July of 1987. A complete list of all data parameters are described by the SeaDataNet Parameter Discovery Vocabulary (PDV) keywords assigned in this metadata record. The data were collected by the University of Wales, Bangor School of Ocean Sciences.

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    The dataset comprises 15 hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, from across the Irish Sea and surrounding regions (Celtic Sea, St. George's Channel, North Channel and Clyde Sea) during September of 1987. A complete list of all data parameters are described by the SeaDataNet Parameter Discovery Vocabulary (PDV) keywords assigned in this metadata record. The data were collected by the University of Wales, Bangor School of Ocean Sciences.

  • Categories  

    The dataset comprises 24 hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, from across the Irish Sea and surrounding regions (Celtic Sea, St. George's Channel, North Channel and Clyde Sea) during October of 1987. A complete list of all data parameters are described by the SeaDataNet Parameter Discovery Vocabulary (PDV) keywords assigned in this metadata record. The data were collected by the University of Wales, Bangor School of Ocean Sciences.

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    This dataset comprises hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, during November 1995. It incorporates a CTD grid survey of the Irish Sea between the Isle of Man and the UK mainland. The data were collected by the Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory.

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    This dataset comprises hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, during January 1991. It incorporates CTD sections offshore from the mouths of the Tyne and the Tees plus CTD sections and anchor stations in the Humber Estuary, Humber Plume and the Wash. The data were collected by the Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory as part of the Joint Nutrient Study I (JoNuS).

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    This dataset comprises hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, during September - October 1992. It incorporates CTD anchor stations and grid surveys in the Humber Estuary, Humber Plume and the Wash, a survey of the Southern North Sea and some casts off the east coast of Scotland. The data were collected by the Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory as part of the Joint Nutrient Study I (JoNuS).

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    This dataset comprises hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, during January 1993. It incorporates a CTD survey of the waters within 20 miles of the UK east coast from the Tees to the Thames including stations in the Humber Estuary, Humber Plume and the Wash. The data were collected by the Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory as part of the Joint Nutrient Study I (JoNuS).

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    This dataset comprises hydrographic data profiles, collected by a conductivity-temperature-depth (CTD) sensor package, during May 1994 in the Irish Sea. The data were collected by the Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory.

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    This dataset consists of 50 CTD casts and 330 salinity samples from 44 CTD stations collected aboard RRS James Cook cruise JC011, which ran between Southampton and Fairlie from the 13th of July 2007 to the 18 of August 2007. Data were collected using a ship-deployed stainless steel CTD frame mounted with the following equipment: • Sea-Bird 9/11 plus CTD System with dual TC pairs • 24 by 10L Ocean Test Equipment External Spring Water Samplers • Sea-Bird 43 Oxygen Sensor • Chelsea MKIII Aquatracka Fluorometer • Chelsea MKII Alphatracka 25cm path Transmissometer • OED LADCP Pressure Case Battery Pack • RD Instruments Workhorse 300 KHz Lowered ADCP (downward-looking master configuration) • RD Instruments Workhorse 300 KHz Lowered ADCP (upward-looking slave configuration) • Benthos Altimeter • Wetlabs BBRTD backscatter sensor This cruise formed part of the fieldwork component of NERC Discovery Science project ‘Ecosystems of the Mid-Atlantic Ride - ECOMAR’, the UK component of ‘MAR-ECO A field project of the Census of Marine life’. The main objectives of the project are to: • To describe the physical flow regimes, both at the surface and the seafloor, across four sites located to either side of the sub-polar front, with reference to their specific role in mixing mutrients and influencing the down-ward transport of organic carbon. • By remote sensing, produce regional estimates of surface promary production and liekly export flux over the study area. - Measure the export flux of organic matter to the seafloor using sediment trap moorings located at each of the four study sites. • Compare the distribution and abundance of pelagic biomass in relation to the position of the Mid-Atlantic Ridge at either side of the Charlie-Gibbs Fracture Zone and to the accompanying varying regimes of primary production encountered either side of the Sub-Polar Front. • Measure benthic biodiversity and biomass comparing species composition with similar depths at East and West Atlantic margins using traps, suspended camera systems, landers and targeted ROV-based survey and sampling. • Assess the possible boundaries to gene flow at the MAR and Sub-Polar Front and genetic population structure of target species in comparison with the East and West Atlantic margins. Representative vertebrate and invertebrate species with different life histories will be compared to test hypotheses about the relationship between MAR ecology, physical oceanographic factors and genetic dispersal. The Discovery Science project was led by NERC grant reference NE/C512961/1 with principal investigator Professor Imants George Priede of University of Aberdeen, Institute of Biological and Environmental Sciences. Grants held within this were NE/C51300X/1, NE/C512988/1, NE/C512996/1, NE/C513018/1 and NE/C51297X/1 with a collective funding period from 01 October 2006 to 30 September 2012. The CTD and CTD sample data have been received by BODC as raw files from the RRS James Cook, processed and quality controlled using in-house BODC procedures and are available to download from the BODC website.