Metadata Report for BODC Series Reference Number 734679
Metadata Summary
Problem Reports
Data Access Policy
Narrative Documents
Project Information
Data Activity or Cruise Information
Fixed Station Information
BODC Quality Flags
Metadata Summary
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Problem Reports
No Problem Report Found in the Database
Data Quality Report
The following is adapted from the JR81 cruise report. There was found to be excessive rotation of the frame so a fin was added for stabilisation before Station 03 and was moved to a different upright before Station 11. On station 08 the SBE35 standards thermometer calibration slope and offset which had been input as 0 and 1 were corrected, this made an insignificant change to the values recorded. After Station 12 Niskin bottle 8 was found to be cracked and was replaced. After Station 17 there was orange slime on the LADCP and fin which was wiped off. On several of the deeper stations there was considerable spooling and respooling of the winch: Stations 10, 12, 15, 18, 23, 25 and 27 were particularly affected. The Underwater Unit failed at 1000m on the downcast of Station 26 (renamed Station 26a) which was repeated using the alternate Underwater Unit. On Station 26 the altimeter was not displayed to the screen as the channel had been changed and this had not been noticed. After the change of Underwater Unit the altimeter reading was found to drift slightly until the cable was changed before Station 29.
Data Access Policy
Public domain 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.
The recommended acknowledgment is
"This study uses data from the data source/organisation/programme, provided by the British Oceanographic Data Centre and funded by the funding body."
Narrative Documents
Instrument Description
CTD unit and auxiliary sensors
The CTD system used on the JR81 was the BAS Sea-Bird 911 plus, serial numbers 09P20391-0541 (Stations 01-26a) and 09P15759-0480 (Stations 26-32), with a 12 bottle frame and pylon. Only 10 Niskin bottles were fitted to the frame, bottles 2 and 3 were removed to accommodate the LADCP battery. The CTDs were fitted with the following scientific sensors:
| Sensor | Serial Number | Last calibration date |
|---|---|---|
| Primary temperature-SBE 3 plus | 2307 | 19/07/2002 |
| Primary conductivity-SBE 4C | 1913 | 19/07/2002 |
| Pressure-Digiquartz pressure transducer series 410K-105 Stations 01-26a Stations 26-32 | 75429 67241 | 07/07/2002 30/06/2000 |
| Secondary temperature-SBE 3 plus | 2191 | 19/07/2002 |
| Secondary conductivity-SBE 4C | 1912 | 19/07/2002 |
| Altimeter-Tritech | 2130.26993 | - |
| Standards Thermometer-SBE35 | 3527735-0024 | - |
The temperature and conductivity sensors were connected to two SBE 5 T submersible pumps (serial numbers; 52395 and 51813 (Stations 01-26a); 52400 and 51807 (Stations 26-32)).
The salinity samples from the CTD were analysed during the cruise using the BAS Guildline Autosal model 8400B (serial number 65763). The Autosal was standardised using batch P140 IAPSO Standard Seawatersupplied by Ocean Scientific International Ltd.
Sea-Bird Electronics SBE 911 and SBE 917 series CTD profilers
The SBE 911 and SBE 917 series of conductivity-temperature-depth (CTD) units are used to collect hydrographic profiles, including temperature, conductivity and pressure as standard. Each profiler consists of an underwater unit and deck unit or SEARAM. Auxiliary sensors, such as fluorometers, dissolved oxygen sensors and transmissometers, and carousel water samplers are commonly added to the underwater unit.
Underwater unit
The CTD underwater unit (SBE 9 or SBE 9 plus) comprises a protective cage (usually with a carousel water sampler), including a main pressure housing containing power supplies, acquisition electronics, telemetry circuitry, and a suite of modular sensors. The original SBE 9 incorporated Sea-Bird's standard modular SBE 3 temperature sensor and SBE 4 conductivity sensor, and a Paroscientific Digiquartz pressure sensor. The conductivity cell was connected to a pump-fed plastic tubing circuit that could include auxiliary sensors. Each SBE 9 unit was custom built to individual specification. The SBE 9 was replaced in 1997 by an off-the-shelf version, termed the SBE 9 plus, that incorporated the SBE 3 plus (or SBE 3P) temperature sensor, SBE 4C conductivity sensor and a Paroscientific Digiquartz pressure sensor. Sensors could be connected to a pump-fed plastic tubing circuit or stand-alone.
Temperature, conductivity and pressure sensors
The conductivity, temperature, and pressure sensors supplied with Sea-Bird CTD systems have outputs in the form of variable frequencies, which are measured using high-speed parallel counters. The resulting count totals are converted to numeric representations of the original frequencies, which bear a direct relationship to temperature, conductivity or pressure. Sampling frequencies for these sensors are typically set at 24 Hz.
The temperature sensing element is a glass-coated thermistor bead, pressure-protected inside a stainless steel tube, while the conductivity sensing element is a cylindrical, flow-through, borosilicate glass cell with three internal platinum electrodes. Thermistor resistance or conductivity cell resistance, respectively, is the controlling element in an optimized Wien Bridge oscillator circuit, which produces a frequency output that can be converted to a temperature or conductivity reading. These sensors are available with depth ratings of 6800 m (aluminium housing) or 10500 m (titanium housing). The Paroscientific Digiquartz pressure sensor comprises a quartz crystal resonator that responds to pressure-induced stress, and temperature is measured for thermal compensation of the calculated pressure.
Additional sensors
Optional sensors for dissolved oxygen, pH, light transmission, fluorescence and others do not require the very high levels of resolution needed in the primary CTD channels, nor do these sensors generally offer variable frequency outputs. Accordingly, signals from the auxiliary sensors are acquired using a conventional voltage-input multiplexed A/D converter (optional). Some Sea-Bird CTDs use a strain gauge pressure sensor (Senso-Metrics) in which case their pressure output data is in the same form as that from the auxiliary sensors as described above.
Deck unit or SEARAM
Each underwater unit is connected to a power supply and data logging system: the SBE 11 (or SBE 11 plus) deck unit allows real-time interfacing between the deck and the underwater unit via a conductive wire, while the submersible SBE 17 (or SBE 17 plus) SEARAM plugs directly into the underwater unit and data are downloaded on recovery of the CTD. The combination of SBE 9 and SBE 17 or SBE 11 are termed SBE 917 or SBE 911, respectively, while the combinations of SBE 9 plus and SBE 17 plus or SBE 11 plus are termed SBE 917 plus or SBE 911 plus.
Specifications
Specifications for the SBE 9 plus underwater unit are listed below:
| Parameter | Range | Initial accuracy | Resolution at 24 Hz | Response time |
|---|---|---|---|---|
| Temperature | -5 to 35°C | 0.001°C | 0.0002°C | 0.065 sec |
| Conductivity | 0 to 7 S m-1 | 0.0003 S m-1 | 0.00004 S m-1 | 0.065 sec (pumped) |
| Pressure | 0 to full scale (1400, 2000, 4200, 6800 or 10500 m) | 0.015% of full scale | 0.001% of full scale | 0.015 sec |
Further details can be found in the manufacturer's specification sheet.
Tritech Digital Precision Altimeter PA200
This altimeter is a sonar ranging device that gives the height above the sea bed when mounted vertically. When mounted in any other attitude the sensor provides a subsea distance. It can be configured to operate on its own or under control from an external unit and can be supplied with simultaneous analogue and digital outputs, allowing them to interface to PC devices, data loggers, telemetry systems and multiplexers.
These instruments can be supplied with different housings, stainless steel, plastic and aluminum, which will limit the depth rating. There are three models available: the PA200-20S, PA200-10L and the PA500-6S, whose transducer options differ slightly.
Specifications
| Transducer options | PA200-20S | P200-10L | PA500-6S |
| Frequency (kHz) | 200 | 200 | 500 |
| Beamwidth (°) | 20 Conical | 10 included conical beam | 6 Conical |
| Operating range | 1 to 100 m 0.7 to 50 m | - | 0.3 to 50 m 0.1 to 10 m |
Common specifications are presented below
| Digital resolution | 1 mm |
| Analogue resolution | 0.25% of range |
| Depth rating | 700 , 2000, 4000 and 6800 m |
| Operating temperature | -10 to 40°C |
Further details can be found in the manufacturer's specification sheet.
BODC Processing
Data files for JR81 were provided by the originator in Pstar format. The 32 CTD data files selected for transfer had been bin averaged by pressure to 1db. Files averaged to 24Hz were also provided by the originator however the 1db data were considered to be of a sufficiently high resolution for processing. Each parameter selected for transfer was assigned a parameter code as follows:
| Channel | Originator's Parameter Identifier | Units | Description | BODC Parameter Code | Units | Comments |
|---|---|---|---|---|---|---|
| 1 | time | s | Time from start of data logging | - | - | Parameter not selected for transfer |
| 2 | scanno | scans | Datacycle number | - | - | Parameter not selected for transfer |
| 3 | press | db | Pressure exerted by the water column | PRESPR01 | db | - |
| 4 | temp | °C | Temperature of the water column | TEMPCC01 | °C | Data from primary temperature sensor |
| 5 | temp2 | °C | Temperature of the water column | TEMPCC02 | °C | Data from secondary temperature sensor |
| 6 | altim | m | Height above bed in the water column | AHSFZZ01 | m | - |
| 7 | cond | mS cm-1 | Electrical conductivity of the water column | CNDCST01 | S m-1 | Data from primary conductivity sensor. Converted from mS cm-1 to S m-1 (cond x 0.1) |
| 8 | cond2 | mS cm-1 | Electrical conductivity of the water column | CNDCST02 | S m-1 | Data from secondary conductivity sensor. Converted from mS cm-1 to S m-1 (cond2 x 0.1) |
| 9 | salin | psu | Practical salinity of the water column | PSALCC01 | psu | Primary salinity channel. Derived using peos83 script. |
| 10 | salin2 | psu | Practical salinity of the water column | PSALCC02 | psu | Secondary salinity channel. Derived using peos83 script. |
| 11 | potemp | °C | Potential temperature of the water column | POTMCV01 | °C | Primary potential temperature channel. Derived using peos83 script. |
| 12 | potem2 | °C | Potential temperature of the water column | POTMCV02 | °C | Secondary potential temperature channel. Derived using peos83 script. |
| 13 | sigma0 | kg m-3 | Sigma-theta (density) of the water column | SIGTPR01 | kg m-3 | Primary density channel. Derived using peos83 script. |
| 14 | sigma02 | kg m-3 | Sigma-theta (density) of the water column | SIGTPR02 | kg m-3 | Secondary density channel. Derived using peos83 script. |
The Matlab transfer function 360 was run to convert the Pstar files into an internal NetCDF format (QXF). The transfer automatically converted the conductivity channels from mS/cm to S/m. The parameters time (s) and scanno (scans) were not selected for transfer as the data were bin averaged by pressure. The coordinates of the data files were checked using Google Earth to make sure that they matched the cast locations described in the cruise report.
Data from file headers were separated off into tagged ASCII files which were later used in loading metadata to the database. The originator's Pstar files contained uncorrected water depths in the file headers, which were often shallower than the maximum sensor depths. Subsequently, water depth has been calculated, for all stations except station 26, by combining the pressure and altimeter data. To calculate the water depth, the pressure sensor maximum (db) was converted to the maximum depth (m) via the Matlab script 'ptodep' using the Saunders and Fofonoff method. This value was then added to the corresponding altimeter height above the seabed. The data file from station 26 (BODC ref 734631) contained no altimeter data, in this case the uncorrected water depth from the Pstar header has been used.
Data from the QXF files were visualised using the in-house editor Edserplo. Obvious data spikes were flagged as 'M', null values were flagged as 'N'. Overall, the data are of good quality and there were no significant data spikes present.
Saunders, P.M. / Fofonoff, N.P. , Deep-Sea Research and Oceanographic Abstracts, 23 (1), p.109-111, Jan 1976
Originator's Data Processing
The following information is adapted from the JR81 cruise report.
Sampling strategy
A Conductivity-Temperature-Depth (CTD) probe was used to vertically profile the temperature and salinity of the water column. 32 full depth stations were sampled: a test station, a station at the Rothera Time Series (RaTS) Station and 30 stations across the Drake Passage section (plus one failed cast on Station 26). At each CTD station on JR81, all ten Niskin bottles were closed and sampled for salinity analysis and subsequent CTD conductivity calibration. Bottles were closed using the SeaBird software rather than by pressing the fire button on the Deck Unit. Logging was stopped when the CTD reached the surface. A thermometer was set to record on each bottle firing and to report a 24 second average temperature for comparison with the CTD measurements.
A Viglen Contender P4 1.4 GHz was attached to the Deck Unit. The Deck Unit was switched on whilst the CTD was on deck just before deployment and the control for the pylon usually 'homed'. Data were logged using the SeaBird seasave Win32 software version 5.25 running within the Windows environment. Calibration data were entered in seasave. Logging to the pc was normally started when the CTD was on the deck in order to obtain deck pressure values.
Data Processing
The raw data were logged as a binary file 81ctdNN.dat where NN is the station number. The time variable recorded in the data file is datacycles after the start of logging, the sampling rate is 24Hz. The logging start time has to be obtained from the file header and derives from the pc clock. The time on the pc clock was therefore periodically synchronised with the ship's master clock. Data files were backed up to the pc network (N:) drive and copied to the UNIX system which was mounted as the U: drive where further processing was carried out. The SeaBird SBEDataPro conversion utility was used to convert the logged binary data to ASCII files and also to apply the cell thermal mass correction using the standard coefficients (a = 0.03 and b = 1/7).
The temperature and conductivity sensors are separated in space within the pumped system and the seawater first passes the temperature sensor and then the conductivity sensor. Values for the conductivity advance were estimated by choosing the time shifts to minimise the noise in the derived salinities. The misalignment was reduced by delaying the primary conductivity by 1 datacycle (1/24 seconds) and advancing the secondary conductivity by 1 datacycle.
After the thermal mass correction had been applied, the data were transferred to the UNIX machine jruf by copying to a mounted "U-drive" on the pc. Once on the UNIX system the data were processed using pstar data format and c-shell scripts.
Field Calibrations
The CTD conductivity sensors were calibrated against the bottle sample salinity measurements. For each cast, a cshell script botcond was run, to calculate sample conductivity from bottle salinity, CTD pressure and (primary) temperature. Bottle minus CTD conductivity was calculated for each sample and for both CTD conductivity sensors.
Apart from the inevitable few outliers the conductivity calibration was of very good quality. There was no significant dependence of either conductivity sensor on pressure, temperature or time. The primary conductivity was too low by 0.0035 ± 0.0010 mS/cm and the secondary by 0.0002 ± 0.0009 mS/cm. These adjustments were therefore applied to the sensors.
The SBE35 data were compared to the data from both the primary and secondary temperature sensors of the SBE911plus using data extracted in the 24 seconds after each was fired. Near the surface, as expected, the comparisons are quite noisy. Below 1000m the mean differences between both the CTD temperatures and the SBE35 were 0.001±0.001°C, the SBE35 being colder than both CTD sensors. No correction is applied as the nominal accuracy of both the standards thermometer and the CTD temperature sensors is 0.001°C. The difference between the two CTD temperature sensors is of order 0.0001°C.
Salinities, potential temperatures and potential densities calculated with peos83 to give the master file 81ctdNN.24Hz. The downcast data cycles were extracted and the downcast averaged to 1db to give the file 81ctdNN.1db. The master file (81ctdNN.24Hz) was averaged to 1Hz using pavrge to give the file 81ctdNN.1Hz. The winch data were also read in as part of the CTD processing using the script win0 which requires the station number and start and stop times for the cast.
Project Information
World Ocean Circulation Experiment (WOCE)
The World Ocean Circulation Experiment (WOCE) was a major international experiment which made measurements and undertook modelling studies of the deep oceans in order to provide a much improved understanding of the role of ocean circulation in changing and ameliorating the Earth's climate.
WOCE had two major goals:
-
Goal 1. To develop models to predict climate and to collect the data necessary to test them.
-
Goal 2. To determine the representativeness of the Goal 1 observations and to deduce cost effective means of determining long-term changes in ocean circulation.
Data Activity or Cruise Information
Cruise
| Cruise Name | JR20021224 (JR81) |
| Departure Date | 2002-12-14 |
| Arrival Date | 2003-01-02 |
| Principal Scientist(s) | Sheldon Bacon (Southampton Oceanography Centre) |
| Ship | RRS James Clark Ross |
Complete Cruise Metadata Report is available here
Fixed Station Information
Fixed Station Information
| Station Name | Drake Passage - WOCE SR1b |
| Category | Offshore route/traverse |
World Ocean Circulation Experiment (WOCE) Southern Repeat Section 1B - Falkland Islands to Elephant Island
WOCE Southern Repeat Section 1B is a section across Drake Passage in the South Atlantic Ocean. The nominal end points of the section (to date) are at 52° 55.74' S, 58° 00.00' W (at the south of the Falkland Islands) and 61° 03.05' S, 54° 33.10' W (off Elephant Island at the north end of the Antarctic Peninsula).
The section was first occupied by the R/V Polarstern in 1992 (Gersonde, 1993). The first UK occupation of SR1b followed on RRS Discovery later the same year. The National Oceanography Centre, Southampton (formerly known as Southampton Oceanography Centre), in collaboration with the British Antarctic Survey, have occupied the section most years since 1993 on the RRS James Clark Ross. Additionally, there were three Spanish occupations on R/V Hespérides in February 1995, 1996 and 1998 (Garcia et al., 2002). A Drake Passage summary report for RRS James Clark Ross cruises between 1993 - 2000 has been produced.
A table of cruises which occupied SR1b is presented below with links to the relevant cruise reports (were available).
| Cruise | Country | Start Date | End Date |
|---|---|---|---|
| R/V Polarstern ANT 10-5 | Germany | 08-08-1992 | 26-09-1992 |
| RRS Discovery D198 | United Kingdom | 11-11-1992 | 17-12-1992 |
| RRS James Clark Ross JR0a | United Kingdom | 20-11-1993 | 18-12-1993 |
| RRS James Clark Ross JR0b | United Kingdom | 13-11-1994 | 30-11-1994 |
| R/V Hespérides 29HE19951203 | Spain | 03-12-1995 | 06-01-1996 |
| R/V Hespérides 29HE19960117 | Spain | 17-01-1996 | 05-02-1996 |
| RRS James Clark Ross JR16 | United Kingdom | 13-11-1996 | 07-12-1996 |
| RRS James Clark Ross JR27 | United Kingdom | 17-12-1997 | 08-01-1998 |
| R/V Hespérides 29HE19980730 | Spain | 27-07-1998 | 27-08-1998 |
| RRS James Clark Ross JR47 | United Kingdom | 13-01-2000 | 17-02-2000 |
| RRS James Clark Ross JR55 | United Kingdom | 21-11-2000 | 14-12-2000 |
| RRS James Clark Ross JR67 | United Kingdom | 19-11-2001 | 17-12-2001 |
| RRS James Clark Ross JR81 | United Kingdom | 18-12-2002 | 02-01-2003 |
| RRS James Clark Ross JR94 | United Kingdom | 28-11-2003 | 16-12-2003 |
| RRS James Clark Ross JR115 | United Kingdom | 01-12-2004 | 19-12-2004 |
| RRS James Clark Ross JR139 | United Kingdom | 05-12-2005 | 12-12-2005 |
| RRS James Clark Ross JR163 | United Kingdom | 06-12-2006 | 15-12-2006 |
| RRS James Clark Ross JR193 | United Kingdom | 29-11-2007 | 08-12-2007 |
| RRS James Clark Ross JR194 | United Kingdom | 12-12-2008 | 20-12-2008 |
| RRS James Cook JC031 | United Kingdom | 03-02-2009 | 03-03-2009 |
| RRS James Clark Ross JR195 | United Kingdom | 19-11-2009 | 26-11-2009 |
| RRS James Clark Ross JR242 | United Kingdom | 06-12-2010 | 18-12-2000 |
| RRS James Clark Ross JR276 | United Kingdom | 09-04-2011 | 26-04-2011 |
| RRS James Clark Ross JR265 and JR254D | United Kingdom | 27-11-2011 | 24-12-2011 |
References
García, M. A., I. Bladé, A. Cruzado, Z. Velásquez, H. García, J. Puigdefàbregas and J. Sospedra, 2002: Observed variability of water properties and transports on the World Ocean Circulation Experiment SR1b section across the Antarctic Circumpolar Current. J. Geophys. Res. 107 (C10) 3162, 10.1029/2000JC000277.
Gersonde, R., 1993: The Expedition Antarktis X/5 of RV Polarstern in 1992. Berichte zur Polarforschung, 131, 167 pp.
Other Series linked to this Fixed Station for this cruise - 734342 734354 734366 734378 734391 734409 734410 734422 734434 734446 734458 734471 734483 734495 734502 734514 734526 734538 734551 734563 734575 734587 734599 734606 734618 734631 734643 734655 734667 734680 734692
Other Cruises linked to this Fixed Station (with the number of series) - JC031 (105) JR19931120 (JR00a) (30) JR19941113 (JR0B) (29) JR19961128 (JR16) (29) JR19971217 (JR27) (54) JR20000113 (JR47) (29) JR20001121 (JR55) (31) JR20021224 (JR81) (31) JR20031211 (JR94) (30) JR20041201 (JR111, JR115) (35) JR20071129 (JR171, JR193, JR196, JR212) (32) JR20081212 (JR194, JR197) (30) JR20091118 (JR195, JR198) (33) JR20101205 (JR242) (9) JR20110409 (JR276) (15)
Fixed Station Information
| Station Name | Drake Passage |
| Category | Offshore area |
| Latitude | 59° 0.00' S |
| Longitude | 62° 0.00' W |
| Water depth below MSL |
Drake Passage
The World Ocean Circulation Experiment (WOCE, 1990-1998) was a major international experiment which made measurements and undertook modelling studies of the deep oceans in order to provide a much improved understanding of the role of ocean circulation in changing and ameliorating the Earth's climate.
The Drake Passage is the narrowest constriction of the Antarctic Circumpolar Current (ACC) - the largest current in the world and connects all three major oceanic basins both horizontally and vertically, thus being a key control in the global overturning circulation.Within the Drake Passage, two repeat hydrographic sections (SR1 and SR1b) were established by WOCE. These were designed to extend measurements collected earlier by the International Southern Ocean Studies (ISOS) programme and have continued beyond the WOCE time-frame.
The original section was SR1 (which also covers part of the A21 one time survey track). Subsequently, the section was shifted to the east (and designated SR1b) in order for it to lie on a satellite ground track as illustrated in the image below.
In addition to the hydrographic measurements, UK research in Drake Passage also includes a network of coastal and deep tide gauges, analysis of satellite altimeter data, and state-of-the-art global numerical modeling.
Other Series linked to this Fixed Station for this cruise - 734342 734354 734366 734378 734391 734409 734410 734422 734434 734446 734458 734471 734483 734495 734502 734514 734526 734538 734551 734563 734575 734587 734599 734606 734618 734631 734643 734655 734667 734680 734692
Other Cruises linked to this Fixed Station (with the number of series) - JC031 (247) JC054 (18) JR19931120 (JR00a) (30) JR19941113 (JR0B) (29) JR19961128 (JR16) (29) JR20000113 (JR47) (29) JR20001121 (JR55) (32) JR20021224 (JR81) (31) JR20031211 (JR94) (30) JR20041201 (JR111, JR115) (35) JR20050124 (JR112, JR113) (13) JR20060216 (JR136, JR137) (6) JR20061215 (JR155) (6) JR20071129 (JR171, JR193, JR196, JR212) (32) JR20091118 (JR195, JR198) (33) JR20101205 (JR242) (9) JR20110409 (JR276) (15) RATS/CTD100 (1) RATS/CTD103 (1) RATS/CTD106 (1) RATS/CTD108 (1) RATS/CTD111 (1) RATS/CTD113 (1) RATS/CTD115 (1) RATS/CTD120 (1) RATS/CTD122 (1) RATS/CTD124 (1) RATS/CTD126 (1) RATS/CTD129 (1) RATS/CTD131 (1) RATS/CTD133 (1) RATS/CTD136 (1) RATS/CTD138 (1) RATS/CTD140 (1) RATS/CTD142 (1) RATS/CTD145 (1) RATS/CTD147 (1) RATS/CTD150 (1) RATS/CTD151 (1) RATS/CTD153 (1) RATS/CTD154 (1) RATS/CTD156 (1) RATS/CTD157 (1) RATS/CTD160 (1) RATS/CTD163 (1) RATS/CTD164 (1) RATS/CTD166 (1) RATS/CTD167 (1) RATS/CTD169 (1) RATS/CTD170 (1) RATS/CTD173 (1) RATS/CTD175 (1) RATS/CTD177 (1) RATS/CTD180 (1) RATS/CTD182 (1) RATS/CTD184 (1) RATS/CTD186 (1) RATS/CTD189 (1) RATS/CTD191 (1) RATS/CTD193 (1) RATS/CTD195 (1) RATS/CTD198 (1) RATS/CTD200 (1) RATS/CTD202 (1) RATS/CTD204 (1) RATS/CTD206 (1) RATS/CTD208 (1) RATS/CTD210 (1) RATS/CTD214 (1) RATS/CTD217 (1) RATS/CTD219 (1) RATS/CTD221 (1) RATS/CTD223 (1) RATS/CTD225 (1) RATS/CTD227 (1) RATS/CTD230 (1) RATS/CTD232 (1) RATS/CTD234 (1) RATS/CTD237 (1) RATS/CTD239 (1) RATS/CTD241 (1) RATS/CTD243 (1) RATS/CTD245 (1) RATS/CTD247 (1) RATS/CTD249 (1) RATS/CTD251 (1) RATS/CTD254 (1) RATS/CTD256 (1) RATS/CTD258 (1) RATS/CTD260 (1) RATS/CTD262 (1) RATS/CTD265 (1) RATS/CTD267 (1) RATS/CTD269 (1) RATS/CTD271 (1) RATS/CTD273 (1) RATS/CTD275 (1) RATS/CTD277 (1) RATS/CTD281 (1) RATS/CTD283 (1) RATS/CTD285 (1) RATS/CTD287 (1) RATS/CTD289 (1) RATS/CTD291 (1) RATS/CTD293 (1) RATS/CTD295 (1) RATS/CTD297 (1) RATS/CTD301 (1) RATS/CTD305 (1) RATS/CTD307 (1) RATS/CTD309 (1) RATS/CTD311 (1) RATS/CTD313 (1) RATS/CTD315 (1) RATS/CTD317 (1) RATS/CTD319 (1) RATS/CTD321 (1) RATS/CTD323 (1) RATS/CTD325 (1) RATS/CTD327 (1) RATS/CTD329 (1) RATS/CTD331 (1) RATS/CTD335 (1) RATS/CTD337 (1) RATS/CTD341 (1) RATS/CTD343 (1) RATS/CTD345 (1) RATS/CTD347 (1) RATS/CTD351 (1) RATS/CTD353 (1) RATS/CTD355 (1) RATS/CTD357 (1) RATS/CTD361 (1) RATS/CTD363 (1) RATS/CTD365 (1) RATS/CTD373 (1) RATS/CTD375 (1) RATS/CTD377 (1) RATS/CTD379 (1) RATS/CTD381 (1) RATS/CTD383 (1) RATS/CTD385 (1) RATS/CTD387 (1) RATS/CTD389 (1) RATS/CTD395 (1) RATS/CTD397 (1) RATS/CTD399 (1) RATS/CTD401 (1) RATS/CTD403 (1) RATS/CTD405 (1) RATS/CTD407 (1) RATS/CTD409 (1) RATS/CTD411 (1) RATS/CTD415 (1) RATS/CTD417 (1) RATS/CTD419 (1) RATS/CTD423 (1) RATS/CTD425 (1) RATS/CTD427 (1) RATS/CTD429 (1) RATS/CTD43 (1) RATS/CTD431 (1) RATS/CTD433 (1) RATS/CTD437 (1) RATS/CTD439 (1) RATS/CTD443 (1) RATS/CTD445 (1) RATS/CTD461 (1) RATS/CTD463 (1) RATS/CTD465 (1) RATS/CTD467 (1) RATS/CTD469 (1) RATS/CTD471 (1) RATS/CTD473 (1) RATS/CTD475 (1) RATS/CTD477 (1) RATS/CTD479 (1) RATS/CTD481 (1) RATS/CTD483 (1) RATS/CTD485 (1) RATS/CTD487 (1) RATS/CTD489 (1) RATS/CTD49 (1) RATS/CTD491 (1) RATS/CTD493 (1) RATS/CTD495 (1) RATS/CTD497 (1) RATS/CTD499 (1) RATS/CTD501 (1) RATS/CTD503 (1) RATS/CTD505 (1) RATS/CTD507 (1) RATS/CTD509 (1) RATS/CTD51 (1) RATS/CTD511 (1) RATS/CTD513 (1) RATS/CTD515 (1) RATS/CTD517 (1) RATS/CTD519 (1) RATS/CTD521 (1) RATS/CTD523 (1) RATS/CTD525 (1) RATS/CTD527 (1) RATS/CTD529 (1) RATS/CTD53 (1) RATS/CTD531 (1) RATS/CTD534 (1) RATS/CTD536 (1) RATS/CTD538 (1) RATS/CTD540 (1) RATS/CTD542 (1) RATS/CTD545 (1) RATS/CTD547 (1) RATS/CTD549 (1) RATS/CTD55 (1) RATS/CTD551 (1) RATS/CTD553 (1) RATS/CTD555 (1) RATS/CTD557 (1) RATS/CTD559 (1) RATS/CTD561 (1) RATS/CTD563 (1) RATS/CTD565 (1) RATS/CTD567 (1) RATS/CTD569 (1) RATS/CTD571 (1) RATS/CTD573 (1) RATS/CTD575 (1) RATS/CTD577 (1) RATS/CTD579 (1) RATS/CTD58 (1) RATS/CTD581 (1) RATS/CTD583 (1) RATS/CTD585 (1) RATS/CTD587 (1) RATS/CTD589 (1) RATS/CTD591 (1) RATS/CTD593 (1) RATS/CTD595 (1) RATS/CTD597 (1) RATS/CTD599 (1) RATS/CTD60 (1) RATS/CTD601 (1) RATS/CTD603 (1) RATS/CTD605 (1) RATS/CTD607 (1) RATS/CTD609 (1) RATS/CTD611 (1) RATS/CTD613 (1) RATS/CTD615 (1) RATS/CTD617 (1) RATS/CTD619 (1) RATS/CTD62 (1) RATS/CTD621 (1) RATS/CTD623 (1) RATS/CTD625 (1) RATS/CTD627 (1) RATS/CTD629 (1) RATS/CTD631 (1) RATS/CTD633 (1) RATS/CTD635 (1) RATS/CTD637 (1) RATS/CTD639 (1) RATS/CTD64 (1) RATS/CTD654 (1) RATS/CTD66 (1) RATS/CTD669 (1) RATS/CTD678 (1) RATS/CTD68 (1) RATS/CTD687 (1) RATS/CTD695 (1) RATS/CTD70 (1) RATS/CTD705 (1) RATS/CTD72 (1) RATS/CTD722 (1) RATS/CTD724 (1) RATS/CTD727 (1) RATS/CTD729 (1) RATS/CTD731 (1) RATS/CTD733 (1) RATS/CTD735 (1) RATS/CTD737 (1) RATS/CTD739 (1) RATS/CTD74 (1) RATS/CTD741 (1) RATS/CTD743 (1) RATS/CTD745 (1) RATS/CTD747 (1) RATS/CTD749 (1) RATS/CTD751 (1) RATS/CTD753 (1) RATS/CTD755 (1) RATS/CTD757 (1) RATS/CTD759 (1) RATS/CTD761 (1) RATS/CTD763 (1) RATS/CTD765 (1) RATS/CTD767 (1) RATS/CTD77 (1) RATS/CTD771 (1) RATS/CTD773 (1) RATS/CTD775 (1) RATS/CTD777 (1) RATS/CTD779 (1) RATS/CTD781 (1) RATS/CTD783 (1) RATS/CTD785 (1) RATS/CTD787 (1) RATS/CTD789 (1) RATS/CTD795 (1) RATS/CTD797 (1) RATS/CTD799 (1) RATS/CTD80 (1) RATS/CTD801 (1) RATS/CTD803 (1) RATS/CTD805 (1) RATS/CTD807 (1) RATS/CTD809 (1) RATS/CTD811 (1) RATS/CTD813 (1) RATS/CTD817 (1) RATS/CTD819 (1) RATS/CTD82 (1) RATS/CTD821 (1) RATS/CTD823 (1) RATS/CTD825 (1) RATS/CTD827 (1) RATS/CTD829 (1) RATS/CTD831 (1) RATS/CTD833 (1) RATS/CTD837 (1) RATS/CTD839 (1) RATS/CTD84 (1) RATS/CTD841 (1) RATS/CTD843 (1) RATS/CTD845 (1) RATS/CTD847 (1) RATS/CTD849 (1) RATS/CTD851 (1) RATS/CTD853 (1) RATS/CTD855 (1) RATS/CTD857 (1) RATS/CTD859 (1) RATS/CTD861 (1) RATS/CTD863 (1) RATS/CTD865 (1) RATS/CTD867 (1) RATS/CTD869 (1) RATS/CTD87 (1) RATS/CTD871 (1) RATS/CTD873 (1) RATS/CTD879 (1) RATS/CTD881 (1) RATS/CTD883 (1) RATS/CTD885 (1) RATS/CTD887 (1) RATS/CTD889 (1) RATS/CTD89 (1) RATS/CTD891 (1) RATS/CTD893 (1) RATS/CTD895 (1) RATS/CTD897 (1) RATS/CTD899 (1) RATS/CTD901 (1) RATS/CTD903 (1) RATS/CTD905 (1) RATS/CTD907 (1) RATS/CTD909 (1) RATS/CTD91 (1) RATS/CTD913 (1) RATS/CTD915 (1) RATS/CTD917 (1) RATS/CTD919 (1) RATS/CTD921 (1) RATS/CTD923 (1) RATS/CTD925 (1) RATS/CTD927 (1) RATS/CTD929 (1) RATS/CTD93 (1) RATS/CTD931 (1) RATS/CTD933 (1) RATS/CTD935 (1) RATS/CTD937 (1) RATS/CTD939 (1) RATS/CTD941 (1) RATS/CTD943 (1) RATS/CTD945 (1) RATS/CTD947 (1) RATS/CTD949 (1) RATS/CTD951 (1) RATS/CTD953 (1) RATS/CTD955 (1) RATS/CTD957 (1) RATS/CTD959 (1) RATS/CTD96 (1) RATS/CTD961 (1) RATS/CTD963 (1) RATS/CTD965 (1) RATS/CTD967 (1) RATS/CTD969 (1) RATS/CTD971 (1) RATS/CTD973 (1) RATS/CTD975 (1) RATS/CTD977 (1) RATS/CTD979 (1) RATS/CTD98 (1) RATS/CTD981 (1) RATS/CTD983 (1) RATS/CTD985 (1) RATS/CTD987 (1) RATS/CTD989 (1) RATS/CTD991 (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 |
