Metadata Report for BODC Series Reference Number 1722455
Metadata Summary
Problem Reports
Data Access Policy
Narrative Documents
Project Information
Data Activity or Cruise Information
Fixed Station Information
BODC Quality Flags
SeaDataNet Quality Flags
Metadata Summary
Data Description |
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Time Co-ordinates(UT) |
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Parameters |
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Problem Reports
No Problem Report Found in the Database
Data Access Policy
Open Data
These data have no specific confidentiality restrictions for users. However, users must acknowledge data sources as it is not ethical to publish data without proper attribution. Any publication or other output resulting from usage of the data should include an acknowledgment.
If the Information Provider does not provide a specific attribution statement, or if you are using Information from several Information Providers and multiple attributions are not practical in your product or application, you may consider using the following:
"Contains public sector information licensed under the Open Government Licence v1.0."
Narrative Documents
Instrument Description
The LADCP data were collected using the instrumentation detailed below:
Sensor | Model | Serial Number | Calibration (UT) | Comments |
---|---|---|---|---|
LADCP | Teledyne RDI high-power Workhorse 300kHz | 15288 | - | LDEO unit, downward looking |
One Teledyne RDI Workhorse 300kHz ADCP was mounted on the Sea-Bird 9 11 plus CTD frame pointing downward (downlooker).
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 Processing
LDEO processed data were provided by the originator in Matlab and ASCII formats. The LDEO processed data in ASCII format were converted into BODC internal format after discussion with the originator. All data provided were from the downward looking RDI 300 kHz Workhorse ADCP which was 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 Parameter Name | Units | Description | BODC Parameter Code | Units | Comments |
---|---|---|---|---|---|
z | m | Depth of LADCP bin | ADEPZZ01 | m | - |
u | m s-1 | Eastward velocity | LCEWLW01 | cm s-1 | Units converted from m s-1 to cm s-1 by multiplying by 100. |
v | m s-1 | Northward velocity | LCNSLW01 | cm s-1 | Units converted from m s-1 to cm s-1 by multiplying by 100. |
ev | m s-1 | Uncertainty estimates of LADCP velocity profile | 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.
Note that the more complex LDEO processed data are available on request in Matlab format as well as the unprocessed raw LADCP files.
Originator's Data Processing
Sampling Strategy
A total of 84 LADCP profiles were collected at all CTD stations in order to derive full-depth profiles of ocean velocity, as well as profiles of finestructure vertical shear.
Data processing
Preliminary shipboard processing of the LADCP data was carried out with the LDEO IX LADCP processing software using averaged one Hz ascii CTD data in order to correct the LADCP data for depth and sound speed.
Please refer to Thurnherr (2014) and cruise report for a more detailed processing methodology. However, please be aware that this processing guide is for software versions IX.7 to IX.10 only, and changes have been made between versions which have the potential for significantly changing the solutions.
References
Thurnherr, A. M., 2014. How To Process LADCP Data With the LDEO Software, Versions IX.7 - IX.10.
Project Information
No Project Information held for the Series
Data Activity or Cruise Information
Cruise
Cruise Name | DY031 |
Departure Date | 2015-05-29 |
Arrival Date | 2015-06-17 |
Principal Scientist(s) | N Penny Holliday (National Oceanography Centre, Southampton) |
Ship | RRS Discovery |
Complete Cruise Metadata Report is available here
Fixed Station Information
Fixed Station Information
Station Name | Ellett Line/Extended Ellett Line Station P |
Category | Offshore location |
Latitude | 57° 6.00' N |
Longitude | 9° 25.02' W |
Water depth below MSL | 1050.0 m |
Ellett Line/Extended Ellett Line: Station P
Station P 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 P 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
BODC Quality Control Flags
The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:
Flag | Description |
---|---|
Blank | Unqualified |
< | 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.) |
D | Thermometric depth |
E | End of CTD Down/Up Cast |
G | Non-taxonomic biological characteristic uncertainty |
H | Extrapolated value |
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 |
N | Null value |
O | Improbable value - user quality control |
P | Trace/calm |
Q | Indeterminate |
R | Replacement value |
S | Estimated value |
T | Interpolated value |
U | Uncalibrated |
W | Control value |
X | Excessive difference |
SeaDataNet Quality Control Flags
The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:
Flag | Description |
---|---|
0 | no quality control |
1 | good value |
2 | probably good value |
3 | probably bad value |
4 | bad value |
5 | changed value |
6 | value below detection |
7 | value in excess |
8 | interpolated value |
9 | missing value |
A | value phenomenon uncertain |
B | nominal value |
Q | value below limit of quantification |
Appendix 1: Ellett Line/Extended Ellett Line Station P
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 |
---|---|---|---|---|
89913 | CTD or STD cast | 1975-05-04 01:06:00 | 57.1 N, 9.4166 W | RRS Challenger CH7A/75 |
89243 | CTD or STD cast | 1975-07-05 05:00:00 | 57.105 N, 9.425 W | RRS Challenger CH10A/75 |
89697 | CTD or STD cast | 1975-08-31 17:00:00 | 57.1 N, 9.4233 W | RRS Challenger CH12A/75 |
90127 | CTD or STD cast | 1975-11-08 14:55:00 | 57.1 N, 9.4216 W | RRS Challenger CH14A/75 |
90385 | CTD or STD cast | 1975-11-11 07:21:00 | 57.1016 N, 9.415 W | RRS Challenger CH14A/75 |
91167 | CTD or STD cast | 1976-05-21 04:55:00 | 57.0983 N, 9.4333 W | RRS Challenger CH8/76 |
94257 | CTD or STD cast | 1977-07-24 18:30:00 | 57.1083 N, 9.4283 W | RRS Challenger CH11/77 |
88701 | CTD or STD cast | 1977-08-21 17:34:00 | 57.0916 N, 9.4116 W | RRS Challenger CH13/77 |
92299 | CTD or STD cast | 1978-02-03 05:37:00 | 57.0883 N, 9.4183 W | RRS Challenger CH2/78 |
92552 | CTD or STD cast | 1978-02-07 14:34:00 | 57.095 N, 9.3833 W | RRS Challenger CH2/78 |
94859 | CTD or STD cast | 1978-04-19 21:37:00 | 57.0966 N, 9.41 W | RRS Challenger CH6/78 |
95328 | CTD or STD cast | 1978-06-06 13:40:00 | 57.0983 N, 9.4133 W | RRS Challenger CH9/78 |
186117 | CTD or STD cast | 1978-08-10 18:09:00 | 57.0966 N, 9.41 W | RRS Challenger CH11B/78 |
314453 | CTD or STD cast | 1978-11-08 12:00:00 | 57.1 N, 9.405 W | RRS Challenger CH14B/78 |
98720 | CTD or STD cast | 1979-05-21 14:22:00 | 57.1 N, 9.4166 W | RRS Challenger CH7/79 |
95918 | CTD or STD cast | 1979-09-14 06:22:00 | 57.0866 N, 9.3866 W | RRS Challenger CH13/79 |
96111 | CTD or STD cast | 1979-10-29 22:34:00 | 57.115 N, 9.4133 W | RRS Challenger CH16/79 |
187692 | CTD or STD cast | 1980-03-03 20:54:00 | 57.095 N, 9.4183 W | RRS Challenger CH4/80 |
312680 | CTD or STD cast | 1981-01-30 00:42:00 | 57.1 N, 9.417 W | RRS Challenger CH2/81 |
187876 | CTD or STD cast | 1981-04-13 03:54:00 | 57.1 N, 9.4166 W | RRS Challenger CH6A/81 |
188413 | CTD or STD cast | 1981-04-21 00:21:00 | 57.1016 N, 9.4183 W | RRS Challenger CH6B/81 |
192227 | CTD or STD cast | 1981-07-12 16:00:00 | 57.1 N, 9.4066 W | RRS Challenger CH10/81 |
187213 | CTD or STD cast | 1981-10-17 15:05:00 | 57.0983 N, 9.4166 W | RRS Challenger CH15/81 |
189176 | CTD or STD cast | 1982-04-27 19:12:00 | 57.12 N, 9.42 W | RRS Challenger CH7A/82 |
193476 | CTD or STD cast | 1983-05-24 20:01:00 | 57.1016 N, 9.415 W | RRS Challenger CH7B/83 |
97058 | CTD or STD cast | 1983-08-19 01:57:00 | 57.1 N, 9.4166 W | RRS Challenger CH11/83 |
313241 | CTD or STD cast | 1984-06-27 22:16:00 | 57.1017 N, 9.4167 W | RRS Challenger CH2/84 |
258351 | CTD or STD cast | 1985-01-26 15:52:00 | 57.1 N, 9.415 W | RRS Challenger CH1/85 |
253912 | CTD or STD cast | 1985-05-08 19:00:00 | 57.1016 N, 9.4166 W | RRS Challenger CH4/85 |
261217 | CTD or STD cast | 1985-08-20 08:05:00 | 57.105 N, 9.415 W | RRS Challenger CH8/85 |
264196 | CTD or STD cast | 1987-01-10 12:49:00 | 57.1 N, 9.4166 W | RRS Challenger CH9 |
250557 | CTD or STD cast | 1987-04-30 06:12:00 | 57.1083 N, 9.4116 W | RRS Challenger CH14 |
266897 | CTD or STD cast | 1988-03-06 07:50:00 | 57.1 N, 9.415 W | RRS Challenger CH25 |
263943 | CTD or STD cast | 1988-06-20 08:50:00 | 57.1 N, 9.415 W | RRS Challenger CH30 |
265384 | CTD or STD cast | 1989-01-24 17:47:00 | 57.1 N, 9.4166 W | RRS Discovery D180 |
265882 | CTD or STD cast | 1989-05-06 07:06:00 | 57.1 N, 9.4166 W | RV Lough Foyle LF1/89 |
317660 | CTD or STD cast | 1989-08-05 11:00:00 | 57.1 N, 9.4167 W | RV Lough Foyle LF2/89 |
316841 | CTD or STD cast | 1989-11-26 03:28:00 | 57.1 N, 9.4133 W | RRS Charles Darwin CD44 |
315063 | CTD or STD cast | 1990-06-28 05:06:00 | 57.1 N, 9.4167 W | RRS Challenger CH67A |
259815 | CTD or STD cast | 1990-09-02 12:29:00 | 57.1 N, 9.4166 W | RRS Challenger CH71A |
382524 | CTD or STD cast | 1991-02-26 21:44:00 | 57.1 N, 9.4167 W | RRS Challenger CH75B |
316226 | CTD or STD cast | 1991-07-02 18:02:00 | 57.1 N, 9.415 W | RRS Challenger CH81 |
386513 | CTD or STD cast | 1992-09-26 23:04:00 | 57.1 N, 9.4167 W | RRS Challenger CH97 |
385718 | CTD or STD cast | 1993-05-17 01:52:00 | 57.0967 N, 9.4133 W | RRS Challenger CH103 |
385811 | CTD or STD cast | 1993-05-17 20:18:00 | 57.0983 N, 9.4167 W | RRS Challenger CH103 |
387854 | CTD or STD cast | 1993-09-08 07:00:00 | 57.1017 N, 9.4183 W | RRS Challenger CH105 |
389098 | CTD or STD cast | 1994-03-18 03:02:00 | 57.1 N, 9.4167 W | RRS Challenger CH110 |
389326 | CTD or STD cast | 1994-05-03 20:40:00 | 57.1 N, 9.4167 W | RRS Challenger CH112 |
389455 | CTD or STD cast | 1994-05-07 23:00:00 | 57.1 N, 9.4167 W | RRS Challenger CH112 |
390849 | CTD or STD cast | 1994-08-16 21:19:00 | 57.1 N, 9.4167 W | RRS Challenger CH114 |
391994 | CTD or STD cast | 1994-11-24 18:22:00 | 57.1 N, 9.4167 W | RRS Challenger CH116 |
434744 | CTD or STD cast | 1995-04-15 19:12:00 | 57.1 N, 9.4167 W | RRS Charles Darwin CD92B |
435409 | CTD or STD cast | 1995-04-30 08:28:00 | 57.1 N, 9.4167 W | RRS Charles Darwin CD92B |
390456 | CTD or STD cast | 1995-07-30 14:53:00 | 57.1005 N, 9.4167 W | RRS Challenger CH120 |
434062 | CTD or STD cast | 1996-01-12 23:14:00 | 57.1 N, 9.4167 W | RRS Challenger CH124 |
1014588 | CTD or STD cast | 1996-10-01 01:02:00 | 57.122 N, 9.4455 W | RRS Discovery D223A |
1850088 | Water sample data | 1996-10-01 02:08:00 | 57.12204 N, 9.44549 W | RRS Discovery D223A |
1008061 | CTD or STD cast | 1997-09-14 07:21:00 | 57.096 N, 9.411 W | RRS Discovery D230 |
1305030 | Water sample data | 1997-09-14 08:16:00 | 57.09605 N, 9.41102 W | RRS Discovery D230 |
2131622 | Water sample data | 1997-09-14 08:16:00 | 57.09605 N, 9.41102 W | RRS Discovery D230 |
1077092 | CTD or STD cast | 1999-06-04 11:59:00 | 57.09367 N, 9.41067 W | Not applicable |
1070658 | CTD or STD cast | 1999-09-11 22:24:00 | 57.111 N, 9.45417 W | RRS Discovery D242 |
1251988 | Water sample data | 1999-09-11 22:51:00 | 57.111 N, 9.45417 W | RRS Discovery D242 |
1075153 | CTD or STD cast | 2000-02-03 14:49:00 | 57.1095 N, 9.4275 W | RRS Discovery D245 |
559197 | CTD or STD cast | 2000-05-19 01:37:00 | 57.0983 N, 9.4217 W | FRV Scotia 0700S |
1230462 | Water sample data | 2000-05-19 01:37:00 | 57.09867 N, 9.4225 W | FRV Scotia 0700S |
676811 | CTD or STD cast | 2001-05-20 10:43:00 | 57.0985 N, 9.421 W | RRS Discovery D253 |
626710 | CTD or STD cast | 2003-04-18 00:36:00 | 57.1018 N, 9.4147 W | FRV Scotia 0703S |
845040 | CTD or STD cast | 2003-07-24 10:25:00 | 57.10048 N, 9.41977 W | Poseidon PO300_2 |
667082 | CTD or STD cast | 2004-07-13 09:59:00 | 57.1 N, 9.42333 W | Poseidon PO314 |
896421 | CTD or STD cast | 2005-10-08 08:09:00 | 57.10036 N, 9.41444 W | RRS Charles Darwin CD176 |
2079164 | Water sample data | 2005-10-08 10:07:18 | 57.10036 N, 9.41444 W | RRS Charles Darwin CD176 |
2139593 | Water sample data | 2005-10-08 10:07:18 | 57.10036 N, 9.41444 W | RRS Charles Darwin CD176 |
776640 | CTD or STD cast | 2006-10-26 02:49:24 | 57.0985 N, 9.42017 W | RRS Discovery D312 |
847488 | CTD or STD cast | 2007-08-30 10:03:32 | 57.09809 N, 9.4162 W | RRS Discovery D321B |
880904 | CTD or STD cast | 2008-05-23 05:41:00 | 57.10183 N, 9.41683 W | FRV Scotia 0508S |
1616922 | Water sample data | 2008-05-23 05:41:00 | 57.10183 N, 9.41683 W | FRV Scotia 0508S |
954357 | CTD or STD cast | 2009-06-20 11:39:38 | 57.10212 N, 9.42846 W | RRS Discovery D340A |
1052800 | CTD or STD cast | 2010-05-20 17:33:27 | 57.09883 N, 9.40567 W | RRS Discovery D351 |
1930015 | Currents -subsurface Eulerian | 2010-05-20 17:34:27 | 57.0998 N, 9.4151 W | RRS Discovery D351 |
1896848 | Water sample data | 2010-05-20 18:20:00 | 57.09849 N, 9.40335 W | RRS Discovery D351 |
1195825 | CTD or STD cast | 2011-05-31 11:40:09 | 57.10033 N, 9.41867 W | RRS Discovery D365 |
1203464 | CTD or STD cast | 2012-08-03 17:46:00 | 57.10052 N, 9.42351 W | RRS Discovery D379 |
1220479 | CTD or STD cast | 2013-05-20 13:37:04 | 57.102 N, 9.4176 W | RRS James Cook JC086 |
2098438 | Water sample data | 2013-05-20 14:19:00 | 57.10056 N, 9.42194 W | RRS James Cook JC086 |
2098900 | Water sample data | 2013-05-20 14:19:00 | 57.10056 N, 9.42194 W | RRS James Cook JC086 |
2099417 | Water sample data | 2013-05-20 14:19:00 | 57.10056 N, 9.42194 W | RRS James Cook JC086 |
2100008 | Water sample data | 2013-05-20 14:19:00 | 57.10056 N, 9.42194 W | RRS James Cook JC086 |
2100567 | Water sample data | 2013-05-20 14:19:00 | 57.10056 N, 9.42194 W | RRS James Cook JC086 |
2101048 | Water sample data | 2013-05-20 14:19:00 | 57.10056 N, 9.42194 W | RRS James Cook JC086 |
2101534 | Water sample data | 2013-05-20 14:19:00 | 57.10056 N, 9.42194 W | RRS James Cook JC086 |
2101952 | Water sample data | 2013-05-20 14:19:00 | 57.10056 N, 9.42194 W | RRS James Cook JC086 |
1371235 | CTD or STD cast | 2014-07-16 02:23:05 | 57.1001 N, 9.4171 W | RRS James Clark Ross JR20140531 (JR302) |
1723354 | CTD or STD cast | 2015-06-14 00:53:47 | 57.0998 N, 9.4173 W | RRS Discovery DY031 |
2150423 | Water sample data | 2015-06-14 01:21:30 | 57.09984 N, 9.41752 W | RRS Discovery DY031 |
1879311 | Water sample data | 2015-06-14 01:22:00 | 57.09984 N, 9.41752 W | RRS Discovery DY031 |
1764636 | CTD or STD cast | 2016-06-17 23:22:44 | 57.0998 N, 9.4175 W | RRS Discovery DY052 |
1765768 | Currents -subsurface Eulerian | 2016-06-17 23:22:55 | 57.0998 N, 9.41755 W | RRS Discovery DY052 |
1874969 | Water sample data | 2016-06-17 23:59:00 | 57.0998 N, 9.41755 W | RRS Discovery DY052 |
2149483 | Water sample data | 2016-06-17 23:59:22 | 57.0998 N, 9.41755 W | RRS Discovery DY052 |
1975974 | CTD or STD cast | 2017-05-16 01:05:50 | 57.1013 N, 9.417 W | RRS Discovery DY078 (DY079) |