Metadata Report for BODC Series Reference Number 1929929
No Problem Report Found in the Database
Open Data supplied by Natural Environment Research Council (NERC)
You must always use the following attribution statement to acknowledge the source of the information: "Contains data supplied by Natural Environment Research Council."
Teledyne RDI's Workhorse Monitor ADCP
The Workhorse Monitor acoustic doppler current profler (Teledyne RD Instruments) is a long-range and long-term self contained ADCP. It has a patented four beam signal (300, 600 or 1200 kHz) and a standard depth rating of 200m or 600m. It operates effectively between temperatures of -5°C and 45°C and has a velocity accuracy of ±1% ±5mm/s.
BODC Data Processing
The LADCP data were supplied as individual files in .lad format. All data provided were from two downward looking Teledyne RDI Workhorse 300 kHz ADCP's, which were in operation at the time. The following table shows how the variables within the ASCII files were mapped to appropriate BODC parameter codes:
|Originator's Variable||Originator's Units||BODC Parameter Code||BODC Units||Comments|
|u||m s-1||LCEWLW01||cm s-1||Units converted from m s-1 to cm s-1 by multiplying by 100.|
|v||m s-1||LCNSLW01||cm s-1||Units converted from m s-1 to cm s-1 by multiplying by 100.|
|ev||m s-1||ERRVLDCP||cm s-1||Units converted from m s-1 to cm s-1 by multiplying by 100.|
All reformatted data were visualised using the in-house Edserplo software. Suspect and missing data were marked by adding an appropriate quality control flag.
Originator's Data Processing
Two Teledyne RDI Workhorse 300 kHz lowered acoustic Doppler current profilers (LADCP) (serial numbers 13329 and 10607) were mounted on two CTD frames, both were positioned in a downward looking orientation. Serial number 13329 was mounted on the stainless steel frame and was last serviced 21st September 2009. Serial number 10607 was mounted on the titanium frame and was last serviced 26th March 2008. Both instruments worked well throughout the cruise, without any evidence of problems.
CTD casts were taken during cruise D351, occupying 62 stations across the Ellett Line and Extended Ellett Line, from which 49 Lowered Acoustic Doppler Current Profiler (LADCP) profiles are available. Processing of LADCP data from stations 010, 025, 051, 052, 055, and 057 crashed, and of these, stations 051, 052, 055, and 057 were in shallow water where there were insufficient data for the processing to work. It is not clear why stations 010 and 025 failed to process as inspection of the LADCP data with the RDI software winADCP identified nothing wrong. It is unknown why data were not provided for station 043.
Data were processed using MatLab Visbeck v10 software. The Visbeck software incorporates ship's position, CTD pressure and vessel mounted ADCP (VM-ADCP) currents to obtain the best solution for water column currents. However, VM-ADCP data were not ready during the cruise so the processing was run without. CTD data were merged with the 'abnv3511' (bestnav) file for position, then converted from PSTAR 2db files to MATLAB format. Time, position and pressure were separated into different .mat files for the Visbeck software.
Please refer to page 60 of the cruise report for more details about the processing methodology.
Oceans 2025 - The NERC Marine Centres' Strategic Research Programme 2007-2012
Who funds the programme?
The Natural Environment Research Council (NERC) funds the Oceans 2025 programme, which was originally planned in the context of NERC's 2002-2007 strategy and later realigned to NERC's subsequent strategy (Next Generation Science for Planet Earth; NERC 2007).
Who is involved in the programme?
The Oceans 2025 programme was designed by and is to be implemented through seven leading UK marine centres. The marine centres work together in coordination and are also supported by cooperation and input from government bodies, universities and other partners. The seven marine centres are:
- National Oceanography Centre, Southampton (NOCS)
- Plymouth Marine Laboratory (PML)
- Marine Biological Association (MBA)
- Sir Alister Hardy Foundation for Marine Science (SAHFOS)
- Proudman Oceanographic Laboratory (POL)
- Scottish Association for Marine Science (SAMS)
- Sea Mammal Research Unit (SMRU)
Oceans2025 provides funding to three national marine facilities, which provide services to the wider UK marine community, in addition to the Oceans 2025 community. These facilities are:
- British Oceanographic Data Centre (BODC), hosted at POL
- Permanent Service for Mean Sea Level (PSMSL), hosted at POL
- Culture Collection of Algae and Protozoa (CCAP), hosted at SAMS
The NERC-run Strategic Ocean Funding Initiative (SOFI) provides additional support to the programme by funding additional research projects and studentships that closely complement the Oceans 2025 programme, primarily through universities.
What is the programme about?
Oceans 2025 sets out to address some key challenges that face the UK as a result of a changing marine environment. The research funded through the programme sets out to increase understanding of the size, nature and impacts of these changes, with the aim to:
- improve knowledge of how the seas behave, not just now but in the future;
- help assess what that might mean for the Earth system and for society;
- assist in developing sustainable solutions for the management of marine resources for future generations;
- enhance the research capabilities and facilities available for UK marine science.
In order to address these aims there are nine science themes supported by the Oceans 2025 programme:
- Climate, circulation and sea level (Theme 1)
- Marine biogeochemical cycles (Theme 2)
- Shelf and coastal processes (Theme 3)
- Biodiversity and ecosystem functioning (Theme 4)
- Continental margins and deep ocean (Theme 5)
- Sustainable marine resources (Theme 6)
- Technology development (Theme 8)
- Next generation ocean prediction (Theme 9)
- Integration of sustained observations in the marine environment (Theme 10)
In the original programme proposal there was a theme on health and human impacts (Theme 7). The elements of this Theme have subsequently been included in Themes 3 and 9.
When is the programme active?
The programme started in April 2007 with funding for 5 years.
Brief summary of the programme fieldwork/data
Programme fieldwork and data collection are to be achieved through:
- physical, biological and chemical parameters sampling throughout the North and South Atlantic during collaborative research cruises aboard NERC's research vessels RRS Discovery, RRS James Cook and RRS James Clark Ross;
- the Continuous Plankton Recorder being deployed by SAHFOS in the North Atlantic and North Pacific on 'ships of opportunity';
- physical parameters measured and relayed in near real-time by fixed moorings and ARGO floats;
- coastal and shelf sea observatory data (Liverpool Bay Coastal Observatory (LBCO) and Western Channel Observatory (WCO)) using the RV Prince Madog and RV Quest.
The data is to be fed into models for validation and future projections. Greater detail can be found in the Theme documents.
|Principal Scientist(s)||Jane F Read (National Oceanography Centre, Southampton)|
Complete Cruise Metadata Report is available here
Fixed Station Information
|Station Name||Ellett Line/Extended Ellett Line Station G|
|Latitude||57° 29.52' N|
|Longitude||11° 51.00' W|
|Water depth below MSL||1812.0 m|
Ellett Line/Extended Ellett Line: Station G
Station G is one of the fixed CTD stations, which together form The Extended Ellett Line. The line lies between Iceland and the Sound of Mull (Scotland) crossing the Iceland Basin and Rockall Trough via the outcrop of Rockall. As part of this initiative, CTD dips, together with associated discrete sampling of the water column, have typically been carried out annually at this station since September 1996.
Prior to September 1996, Station G was part of a shorter repeated survey section, consisting of 35 fixed stations, known as The Ellett Line (originally termed the Anton Dohrn Seamount Section). This line incorporated those stations across the Rockall Trough and Scottish shelf between Rockall and the Sound of Mull and was visited at regular intervals (usually at least once a year) between 1975 and January 1996.
Related Fixed Station activities are detailed in Appendix 1
The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:
|<||Below detection limit|
|>||In excess of quoted value|
|A||Taxonomic flag for affinis (aff.)|
|B||Beginning of CTD Down/Up Cast|
|C||Taxonomic flag for confer (cf.)|
|E||End of CTD Down/Up Cast|
|G||Non-taxonomic biological characteristic uncertainty|
|I||Taxonomic flag for single species (sp.)|
|K||Improbable value - unknown quality control source|
|L||Improbable value - originator's quality control|
|M||Improbable value - BODC quality control|
|O||Improbable value - user quality control|
The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:
|0||no quality control|
|2||probably good value|
|3||probably bad value|
|6||value below detection|
|7||value in excess|
|A||value phenomenon uncertain|
|Q||value below limit of quantification|
Appendix 1: Ellett Line/Extended Ellett Line Station G
Related series for this Fixed Station are presented in the table below. Further information can be found by following the appropriate links.
If you are interested in these series, please be aware we offer a multiple file download service. Should your credentials be insufficient for automatic download, the service also offers a referral to our Enquiries Officer who may be able to negotiate access.
|Series Identifier||Data Category||Start date/time||Start position||Cruise|
|89986||CTD or STD cast||1975-05-04 20:30:00||57.4916 N, 11.85 W||RRS Challenger CH7A/75|
|90220||CTD or STD cast||1975-11-09 09:46:00||57.49 N, 11.8516 W||RRS Challenger CH14A/75|
|90477||CTD or STD cast||1976-04-02 07:05:00||57.4933 N, 11.8566 W||RRS Challenger CH5A/76|
|91272||CTD or STD cast||1976-05-22 21:50:00||57.4966 N, 11.855 W||RRS Challenger CH8/76|
|90914||CTD or STD cast||1977-03-06 18:00:00||57.4916 N, 11.8483 W||RRS Challenger CH4/77|
|92066||CTD or STD cast||1977-04-16 06:42:00||57.4916 N, 11.8533 W||RRS Challenger CH6B/77|
|94153||CTD or STD cast||1977-07-23 22:40:00||57.4866 N, 11.8416 W||RRS Challenger CH11/77|
|88798||CTD or STD cast||1977-08-22 14:21:00||57.4883 N, 11.8366 W||RRS Challenger CH13/77|
|92367||CTD or STD cast||1978-02-05 07:13:00||57.495 N, 11.86 W||RRS Challenger CH2/78|
|92460||CTD or STD cast||1978-02-06 19:47:00||57.4933 N, 11.8566 W||RRS Challenger CH2/78|
|94454||CTD or STD cast||1978-04-16 09:35:00||57.4866 N, 11.8183 W||RRS Challenger CH6/78|
|95236||CTD or STD cast||1978-06-05 12:00:00||57.4883 N, 11.855 W||RRS Challenger CH9/78|
|186025||CTD or STD cast||1978-08-09 19:09:00||57.49 N, 11.8683 W||RRS Challenger CH11B/78|
|190792||CTD or STD cast||1978-09-12 00:10:00||57.4916 N, 11.85 W||RRS Challenger CH11D/78|
|187526||CTD or STD cast||1980-03-02 06:23:00||57.4916 N, 11.8516 W||RRS Challenger CH4/80|
|188879||CTD or STD cast||1980-05-03 21:28:00||57.4933 N, 11.845 W||RRS Challenger CH7/80|
|188321||CTD or STD cast||1981-04-20 05:55:00||57.485 N, 11.8466 W||RRS Challenger CH6B/81|
|189348||CTD or STD cast||1982-05-02 00:22:00||57.4883 N, 11.85 W||RRS Challenger CH7A/82|
|189428||CTD or STD cast||1982-05-09 05:15:00||57.495 N, 11.8416 W||RRS Challenger CH7B/82|
|193612||CTD or STD cast||1983-05-26 05:06:00||57.4916 N, 11.845 W||RRS Challenger CH7B/83|
|96958||CTD or STD cast||1983-08-17 22:10:00||57.4933 N, 11.85 W||RRS Challenger CH11/83|
|313357||CTD or STD cast||1984-06-28 20:53:00||57.4917 N, 11.85 W||RRS Challenger CH2/84|
|257439||CTD or STD cast||1984-11-21 16:32:00||57.4916 N, 11.8516 W||RRS Challenger CH10/84|
|258302||CTD or STD cast||1985-01-26 02:55:00||57.4833 N, 11.8666 W||RRS Challenger CH1/85|
|254012||CTD or STD cast||1985-05-09 12:49:00||57.4933 N, 11.8533 W||RRS Challenger CH4/85|
|261322||CTD or STD cast||1985-08-21 11:27:00||57.4916 N, 11.8483 W||RRS Challenger CH8/85|
|264288||CTD or STD cast||1987-01-11 06:53:00||57.4916 N, 11.85 W||RRS Challenger CH9|
|265476||CTD or STD cast||1989-01-25 14:53:00||57.5 N, 11.85 W||RRS Discovery D180|
|317752||CTD or STD cast||1989-08-06 02:52:00||57.4917 N, 11.85 W||RV Lough Foyle LF2/89|
|316945||CTD or STD cast||1989-11-26 23:27:00||57.4917 N, 11.8483 W||RRS Charles Darwin CD44|
|314963||CTD or STD cast||1990-06-27 11:36:00||57.4933 N, 11.845 W||RRS Challenger CH67A|
|259723||CTD or STD cast||1990-09-01 15:32:00||57.4833 N, 11.85 W||RRS Challenger CH71A|
|382628||CTD or STD cast||1991-02-27 21:23:00||57.4917 N, 11.8517 W||RRS Challenger CH75B|
|316331||CTD or STD cast||1991-07-03 14:29:00||57.4933 N, 11.8533 W||RRS Challenger CH81|
|386605||CTD or STD cast||1992-09-28 06:17:00||57.49 N, 11.8467 W||RRS Challenger CH97|
|385614||CTD or STD cast||1993-05-15 07:48:00||57.4933 N, 11.85 W||RRS Challenger CH103|
|387750||CTD or STD cast||1993-09-06 04:52:00||57.4967 N, 11.86 W||RRS Challenger CH105|
|389222||CTD or STD cast||1994-05-02 13:42:00||57.489 N, 11.8502 W||RRS Challenger CH112|
|390942||CTD or STD cast||1994-08-18 20:59:00||57.4917 N, 11.85 W||RRS Challenger CH114|
|392101||CTD or STD cast||1994-11-26 04:02:00||57.4888 N, 11.8263 W||RRS Challenger CH116|
|435286||CTD or STD cast||1995-04-28 03:59:00||57.4917 N, 11.85 W||RRS Charles Darwin CD92B|
|390573||CTD or STD cast||1995-08-01 02:32:00||57.4922 N, 11.8557 W||RRS Challenger CH120|
|434166||CTD or STD cast||1996-01-14 03:05:00||57.4917 N, 11.85 W||RRS Challenger CH124|
|1014693||CTD or STD cast||1996-10-02 08:43:00||57.49333 N, 11.82867 W||RRS Discovery D223A|
|1850193||Water sample data||1996-10-02 09:32:00||57.49339 N, 11.8287 W||RRS Discovery D223A|
|1070775||CTD or STD cast||1999-09-13 08:20:00||57.50217 N, 11.82067 W||RRS Discovery D242|
|1252107||Water sample data||1999-09-13 08:50:00||57.50217 N, 11.82067 W||RRS Discovery D242|
|1075269||CTD or STD cast||2000-02-14 05:45:00||57.51033 N, 11.84133 W||RRS Discovery D245|
|559093||CTD or STD cast||2000-05-18 05:16:00||57.495 N, 11.85 W||FRV Scotia 0700S|
|1230425||Water sample data||2000-05-18 05:16:00||57.49517 N, 11.85133 W||FRV Scotia 0700S|
|676903||CTD or STD cast||2001-05-21 12:56:00||57.49483 N, 11.8485 W||RRS Discovery D253|
|626814||CTD or STD cast||2003-04-18 19:22:00||57.4912 N, 11.8447 W||FRV Scotia 0703S|
|844939||CTD or STD cast||2003-07-22 06:19:00||57.49387 N, 11.85482 W||FS Poseidon PO300_2|
|667174||CTD or STD cast||2004-07-14 13:31:00||57.48933 N, 11.85067 W||FS Poseidon PO314|
|896513||CTD or STD cast||2005-10-11 21:15:00||57.49164 N, 11.85016 W||RRS Charles Darwin CD176|
|776559||CTD or STD cast||2006-10-24 14:52:01||57.48767 N, 11.846 W||RRS Discovery D312|
|847427||CTD or STD cast||2007-08-29 05:36:24||57.48902 N, 11.84798 W||RRS Discovery D321B|
|880800||CTD or STD cast||2008-05-22 00:52:00||57.49217 N, 11.85217 W||FRV Scotia 0508S|
|1616829||Water sample data||2008-05-22 00:52:00||57.49217 N, 11.85217 W||FRV Scotia 0508S|
|954253||CTD or STD cast||2009-06-17 12:04:46||57.49962 N, 11.84389 W||RRS Discovery D340A|
|1052719||CTD or STD cast||2010-05-19 14:05:06||57.4975 N, 11.85033 W||RRS Discovery D351|
|1896744||Water sample data||2010-05-19 14:58:00||57.49858 N, 11.85285 W||RRS Discovery D351|
|1195733||CTD or STD cast||2011-05-30 10:37:47||57.492 N, 11.8495 W||RRS Discovery D365|
|1203568||CTD or STD cast||2012-08-05 00:05:00||57.49225 N, 11.85052 W||RRS Discovery D379|
|1220375||CTD or STD cast||2013-05-19 04:23:46||57.4917 N, 11.8499 W||RRS James Cook JC086|
|1371131||CTD or STD cast||2014-07-15 03:30:52||57.492 N, 11.8499 W||RRS James Clark Ross JR20140531 (JR302)|
|1723262||CTD or STD cast||2015-06-11 02:01:36||57.4915 N, 11.8483 W||RRS Discovery DY031|
|1722351||Currents -subsurface Eulerian||2015-06-11 02:02:16||57.49152 N, 11.8483 W||RRS Discovery DY031|
|1879206||Water sample data||2015-06-11 02:55:00||57.49152 N, 11.84826 W||RRS Discovery DY031|
|1764544||CTD or STD cast||2016-06-16 07:28:20||57.4915 N, 11.8513 W||RRS Discovery DY052|
|1765676||Currents -subsurface Eulerian||2016-06-16 07:28:30||57.49149 N, 11.85128 W||RRS Discovery DY052|
|1874877||Water sample data||2016-06-16 08:20:00||57.49149 N, 11.85129 W||RRS Discovery DY052|
|1976086||CTD or STD cast||2017-05-18 19:05:01||57.4947 N, 11.8437 W||RRS Discovery DY078 (DY079)|