Metadata Report for BODC Series Reference Number 1736579


Metadata Summary

Data Description

Data Category Currents -subsurface Eulerian
Instrument Type
NameCategories
Teledyne RDI 300kHz Workhorse Monitor direct-reading ADCP  current profilers
Instrument Mounting lowered unmanned submersible
Originating Country United States
Originator Dr Andreas Thurnherr
Originating Organization Lamont-Doherty Earth Observatory
Processing Status banked
Project(s) DIMES
 

Data Identifiers

Originator's Identifier LADCP_017
BODC Series Reference 1736579
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2013-03-22 14:50
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval 7.9 decibars
 

Spatial Co-ordinates

Latitude 57.73278 S ( 57° 44.0' S )
Longitude 56.64072 W ( 56° 38.4' W )
Positional Uncertainty 0.0 to 0.01 n.miles
Minimum Sensor Depth 7.8 m
Maximum Sensor Depth 3474.0 m
Minimum Sensor Height 10.0 m
Maximum Sensor Height 3476.2 m
Sea Floor Depth 3484.0 m
Sensor Distribution Variable common depth - All sensors are grouped effectively at the same depth, but this depth varies significantly during the series
Sensor Depth Datum Approximate - Depth is only approximate
Sea Floor Depth Datum Instantaneous - Depth measured below water line or instantaneous water body surface
 

Parameters

BODC CODE Rank Units Short Title Title
ACYCAA01 1 Dimensionless Record_No Sequence number
ADEPZZ01 1 Metres DepBelowSurf Depth below surface of the water body
ERRVLDCP 1 Centimetres per second LADCPErrVel Current velocity error in the water body by lowered acoustic doppler current profiler (ADCP)
LCEWLW01 1 Centimetres per second CurrVelE_ADCP Eastward current velocity (Eulerian) in the water body by lowered acoustic doppler current profiler (ADCP)
LCNSLW01 1 Centimetres per second CurrVelN_ADCP Northward current velocity (Eulerian) in the water body by lowered acoustic doppler current profiler (ADCP)
 

Definition of Rank

  • Rank 1 is a one-dimensional parameter
  • Rank 2 is a two-dimensional parameter
  • Rank 0 is a one-dimensional parameter describing the second dimension of a two-dimensional parameter (e.g. bin depths for moored ADCP data)

Problem Reports

No Problem Report Found in the Database


Data Access Policy

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."


Narrative Documents

Instrument Description

The LADCP data were collected using the instrumentation detailed below:

Sensor Model Serial Number Calibration (UT) Comments
LADCP Teledyne RDI Workhorse 300kHz 14443 - BAS unit, downward-looking
LADCP Teledyne RDI Workhorse 300kHz 15060 - BAS unit, upward-looking for test sation 1
LADCP Teledyne RDI Workhorse 300kHz 14897 - BAS unit, upward-looking, stations 2-89
LADCP Teledyne RDI Workhorse 300kHz 13400 - NOC unit, upward-looking, stations 90-117
LADCP Teledyne RDI Workhorse 300kHz 12736 - LDEO unit, upward-looking, stations 118-128

The instrument orientation on the rosette was changed several times during the cruise in order to try to minimise wake effects. Three different configurations were used:
Original orientation. Stations 1-18 and 26-34.
Uplooker rotated. Stations 19-25.
Up and Downlooker rotated. Stations 36-128.

After the first test cast, it was found that the uplooker (15060) had a broken beam. It was then replaced with another unit (14897). This unit worked well from station 2 to station 86, but then started to show a weak 2nd beam. It was replaced with another unit (13400) on station 90. However, the unit started to show a weak 3rd beam on station 115, by station 116 the 3rd beam had broken and at station 117 the 2nd beam had broken. It was replaced with another unit (12736) on station 118.

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

LADCP profiles were attempted at all CTD stations in order to derive full-depth profiles of ocean velocity, as well as profiles of finescale vertical shear of horizontal velocities. In total 110 LADCP profiles were obtained successfully.

Data processing

On the ship, the LADCP data were processed using the inverse method maintained by Andreas Thurnherr using LEDO software version IX 9.

One second CTD time-series data, with merged GPS, were used to improve the accuracy of the depth estimation from LADCP data. In addition, VMADCP data collected with a 75kHz system provided profiles of zonal and meridional velocities as well as their standard deviations.

Post cruise, all profiles were re-processed following the same method as on the ship, which is detailed in thecruise report. The main difference between the processing was that the RDI bottom-track data was used after the cruise, whereas the on-ship processing used post-processed bottom track data. For profile 117 the upward-looking data were also removed during post-cruise processing. For final processing, no wake editing was done and the VMADCP data were used to constrain the velocities.

Please refer to Thurnherr (2014) and post-cruise QC document for more details about the processing methodology.

References

Thurnherr, A. M., 2014. How To Process LADCP Data With the LDEO Software, Versions IX.7 to IX.10.


Project Information

Diapycnal and Isopycnal Mixing Experiment in the Southern Ocean (DIMES) project document

DIMES is a US/UK field program aimed at measuring diapycnal and isopycnal mixing in the Southern Ocean, along the tilting isopycnals of the Antarctic Circumpolar Current.

The Meridional Overturning Circulation (MOC) of the ocean is a critical regulator of the Earth's climate processes. Climate models are highly sensitive to the representation of mixing processes in the southern limb of the MOC, within the Southern Ocean, although the lack of extensive in situ observations of Southern Ocean mixing processes has made evaluation of mixing somewhat difficult. Theories and models of the Southern Ocean circulation have been built on the premise of adiabatic flow in the ocean interior, with diabatic processes confined to the upper-ocean mixed layer. Interior diapycnal mixing has often been assumed to be small, but a few recent studies have suggested that diapycnal mixing might be large in some locations, particularly over rough bathymetry. Depending on its extent, this interior diapycnal mixing could significantly affect the overall energetics and property balances for the Southern Ocean and in turn for the global ocean. The goals of DIMES are to obtain measurements that will help us quantify both along-isopycnal eddy-driven mixing and cross-isopycnal interior mixing.

DIMES includes tracer release, isopycnal following RAFOS floats, microstructure measurements, shearmeter floats, EM-APEX floats, a mooring array in Drake Passage, hydrographic observations, inverse modeling, and analysis of altimetry and numerical model output.

DIMES is sponsored by the National Science Foundation (U.S.), Natural Environment Research Council (U.K) and British Antarctic Survey (U.K.)

For more information please see the official project website at DIMES


Data Activity or Cruise Information

Cruise

Cruise Name JR20130317 (JR252B, JR272B, JR273A, JR281, UKD-4)
Departure Date 2013-03-17
Arrival Date 2013-04-27
Principal Scientist(s)Jean-Baptiste Sallee (British Antarctic Survey)
Ship RRS James Clark Ross

Complete Cruise Metadata Report is available here


Fixed Station Information

Fixed Station Information

Station NameDrake Passage - WOCE SR1b
CategoryOffshore 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
RRS James Cook JC069 United Kingdom 31-01-2012 21-03-2012
RRS James Clark Ross JR281 United Kingdom 17-03-2013 27-04-2013
RRS James Clark Ross JR299 United Kingdom 08-03-2014 29-03-2014
RRS James Clark Ross JR306 United Kingdom 10-01-2015 20-01-2015
RRS James Clark Ross JR15003 United Kingdom 17-12-2015 13-01-2016
RRS James Clark Ross JR16002 United Kingdom 10-11-2016 03-12-2016

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 - 1716530 1716542 1716554 1716566 1716578 1716591 1716609 1716610 1716622 1716634 1716646 1716658 1716671 1716683 1716695 1716702 1716714 1716726 1716738 1716751 1716763 1716775 1716787 1716799 1716806 1716818 1716831 1716843 1716855 1716867 1716879 1716880 1716892 1736395 1736402 1736414 1736426 1736438 1736451 1736463 1736475 1736487 1736499 1736506 1736518 1736531 1736543 1736555 1736567 1736580 1736592 1736611 1736623 1736635 1736647 1736659 1736660 1736672 1736684 1736696 1736703 1736715 1736727

Other Cruises linked to this Fixed Station (with the number of series) - JC031 (105) JC069 (UKD-3) (18) JR16002 (61) JR19931120 (JR00a) (30) JR19941113 (JR0B) (29) JR19961128 (JR16) (29) JR19971217 (JR27) (54) JR20000113 (JR47) (29) JR20001121 (JR55) (31) JR20021224 (JR81) (32) JR20031211 (JR94) (30) JR20041201 (JR111, JR115) (35) JR20071129 (JR171, JR193, JR196 Leg1, JR212) (32) JR20081212 (JR194, JR197) (30) JR20091118 (JR195, JR198) (33) JR20101205 (JR242) (9) JR20110409 (JR276, UKD-2.5) (43) JR20111127 (JR254D, JR264, JR265) (31) JR20130317 (JR252B, JR272B, JR273A, JR281, UKD-4) (63) JR20140309 (JR293 Leg1, JR299 Leg1, UKD-5) (21) JR20150110 (JR305, JR306) (31)

Fixed Station Information

Station NameDrake Passage
CategoryOffshore area
Latitude59° 0.00' S
Longitude62° 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.

BODC image

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 - 1716530 1716542 1716554 1716566 1716578 1716591 1716609 1716610 1716622 1716634 1716646 1716658 1716671 1716683 1716695 1716702 1716714 1716726 1716738 1716751 1716763 1716775 1716787 1716799 1716806 1716818 1716831 1716843 1716855 1716867 1716879 1716880 1716892 1736395 1736402 1736414 1736426 1736438 1736451 1736463 1736475 1736487 1736499 1736506 1736518 1736531 1736543 1736555 1736567 1736580 1736592 1736611 1736623 1736635 1736647 1736659 1736660 1736672 1736684 1736696 1736703 1736715 1736727 1744070 1744082 1744094 1744101 1744113 1744125 1744137 1744149 1744150 1744162 1744174 1744186 1744198 1744205 1744217 1744229 1744230 1744242 1744254 1744266 1744278 1744291 1744309 1744310 1744322 1744334 1744346 1744358 1744371 1744383 1744395 1744402 1744414 1744426 1744438 1744451 1744463 1744475 1744487 1744499 1744506 1744518 1744531 1744543 1744555 1744567 1744579 1744580 1744592 1744611 1744623 1744635 1744647 1744659 1744660 1744672 1744684 1744696 1744703 1744715 1744727 1744739 1744740 1744752 1744764 1744776 1744788 1744807 1744819 1744820 1744832 1744844 1744856 1744868 1744881 1744893 1744900 1744912 1744924 1744936 1744948 1744961 1744973 1744985 1744997 1745000 1745012 1745024 1745036 1745048 1745061 1745073 1745085 1745097 1745104 1745116 1745128 1745141 1745153 1745165 1745177 1745189 1745190 1745208 1745221 1745233 1745245 1745257 1745269 1745270 1745282

Other Cruises linked to this Fixed Station (with the number of series) - JC031 (247) JC041 (UKD-1) (66) JC054 (UKD-2) (146) JC069 (UKD-3) (24) JR16002 (61) JR19931120 (JR00a) (30) JR19941113 (JR0B) (29) JR19961128 (JR16) (29) JR20000113 (JR47) (29) JR20001121 (JR55) (32) JR20021224 (JR81) (32) JR20031211 (JR94) (30) JR20041201 (JR111, JR115) (35) JR20050124 (JR112, JR113) (5) JR20060216 (JR136, JR137) (1) JR20061206 (JR155, JR163, JR164) (1) JR20071129 (JR171, JR193, JR196 Leg1, JR212) (32) JR20091118 (JR195, JR198) (33) JR20101205 (JR242) (9) JR20110409 (JR276, UKD-2.5) (65) JR20130317 (JR252B, JR272B, JR273A, JR281, UKD-4) (174) JR20140309 (JR293 Leg1, JR299 Leg1, UKD-5) (21) JR20150110 (JR305, JR306) (1) 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

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