Metadata Report for BODC Series Reference Number 1716486


Metadata Summary

Data Description

Data Category CTD or STD cast
Instrument Type
NameCategories
Sea-Bird SBE 4C conductivity sensor  salinity sensor
Rockland Scientific Vertical Microstructure Profiler (VMP) 5500  microstructure sensors; ADVs and turbulence probes
Sea-Bird SBE 3F temperature sensor  water temperature sensor
Rockland Scientific FP07-38 microstructure thermistor  water temperature sensor; microstructure sensors
Rockland Scientific SPM-38 velocity shear probe  ADVs and turbulence probes
Sea-Bird SBE 7 microstructure conductivity sensor  microstructure sensors; salinity sensor
Instrument Mounting drifting subsurface profiling float
Originating Country United Kingdom
Originator Dr Alex Forryan
Originating Organization National Oceanography Centre, Southampton
Processing Status banked
Project(s) DIMES
 

Data Identifiers

Originator's Identifier JR276VMP_PROC5
BODC Series Reference 1716486
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2011-04-17 01:07
End Time (yyyy-mm-dd hh:mm) 2011-04-17 06:45
Nominal Cycle Interval 1.0 decibars
 

Spatial Co-ordinates

Latitude 62.22220 S ( 62° 13.3' S )
Longitude 78.00000 W ( 78° 0.0' W )
Positional Uncertainty 0.0 to 0.01 n.miles
Minimum Sensor Depth 0.99 m
Maximum Sensor Depth 4805.68 m
Minimum Sensor Height -
Maximum Sensor Height -
Sea Floor Depth -
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 Instantaneous - Depth measured below water line or instantaneous water body surface
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
EPSIPM01 1 Watts per kilogram DissTKEperMass Log10 turbulent kinetic energy dissipation {epsilon} per unit mass of the water body by turbulence profiler shear sensor
PRESPR01 1 Decibars Pres_Z Pressure (spatial co-ordinate) exerted by the water body by profiling pressure sensor and corrected to read zero at sea level
PSALPR01 1 Dimensionless P_sal Practical salinity of the water body by conductivity cell and computation using UNESCO 1983 algorithm
TDSSFT01 1 Degrees Celsius squared per second Log10Chi Log10 temperature dissipation rate in the water body by turbulence profiler fast temperature sensor
TEMPPR01 1 Degrees Celsius Temp Temperature of the water body
 

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

Agilent 6890 networked gas chromatograph

A networked gas chromatograph that separates and analyses gas mixtures in water or air. The instrument includes a dual channel design supporting two inlets and two detectors. An automatic liquid sampling system is fully integrated into the mainframe control and atmospheric pressure and temperature compensation is standard. The instrument also supports 6 column oven ramps with 7 plateaus.

The 6890N is completely customisable depending on the application, with choices of inlets, columns, detectors and sampling systems. Available detectors include; flame ionization, thermal conductivity, micro-electron capture, nitrogen-phosphorus, single- or dual-wavelength flame photometric. Specialised detectors include: atomic emission, Helium ionization, sulphur chemiluminescence and pulsed discharge ionization. All detectors include electronic pneumatics control and electronic on/off for all detector gases. Carrier and makeup gas settings are selectable for He, H2, N2, and argon/methane. There is a choice of inlets including; packed purged injection port, split/splitless capillary inlet, temperature-programmable cool on-column, programmable temperature vaporizer and volatiles inlet. A full array of gas sampling and column switching valves are also available. The instrument has a 7683 ALS interface and incorporates local area network technology as standard.

The Agilent 6890N uses many of the same components as the Agilent 6850N GC producing virtually identical results, but the Agilent 6850N is only half as wide. The Agilent 6890N replaces the HP Agilent 5890 and is no longer in production.

Please see the Agilent 6890N brochure and data sheet for further details.

Instrument Description

Vertical Microstructure Profiler and support sensors

Instrument Serial Number Calibration date Comments
Rockland Scientific International Vertical Microstructure Profiler 5500 016 - -
Sea-bird 3F fast temperature sensor 4634 - Standard with the VMP 5500
Sea-bird 4C conductivity sensor 3240 - Standard with the VMP 5500
Sea-bird SPM-38-5 velocity shear probe (x2) - - Standard with the VMP 5500
Sea-bird FP07-38-5 fast thermistor (x2) - - Standard with the VMP 5500
Sea-bird microstructure conductivity probe (SBE7) - - Optional with the VMP 5500

Please see the cruise report for further details of the instrumentation performance and recommendations.

Rockland Scientific FP07-38 microstructure thermistor

A fast-response temperature sensor measuring microstructure temperature fluctuations for oceanographic applications. The sensing tip is a microbead thermistor (manufactured by GE Thermometics), mounted on a 9.525 mm diameter stainless steel sting which can be attached to ocean microstructure instruments. The instrument consists of small diameter glass-coated thermistor bead, thermetically sealed onto the tip of a shock-resistant glass rod.

Specifications

Range -2 to 32 °C
Resolution 0.0001 °C
Response 0.007 s (nominal)
Nominal resistance 2 kOhm (at 25 °C)
Glass bead maximum 2.2 mm
Thermistor tip Approximately 0.2 mm
Length (overall) 127 mm
Weight (in air) Approximately 100 g
Diameter at base 9.53 mm
Housing SS316 stainless steel
Connector Brass
Bead Glass

Rockland Scientific SPM-38 velocity shear probe

A velocity shear probe measuring microstructure velocity fluctuations in oceans and lakes. The instrument measures a single spatial component of turbulent velocity fluctuations, in a direction perpendicular to the probes main axis. The sensing head is based upon the design by Osborn (1974) and the sensing element consists of a parabolic, flexible rubber tip. The oncoming flow produces a hydrodynamic lift force proportional to the fluctuating cross-stream velocity component u. A piezo-ceramic beam embedded in the rubber tip translates the lift force into an electric signal that is proportional to u. The length of the sensing tip (10 mm) determines the maximum wavenumber resolution of the sensor which is approximately 48 cycles per meter. The measurements can be corrected to include wavenumbers up to 150 cpm.

Specifications

Range 0 to 10 s -1
Resolution Approximately 10 to 4 s -1
Response 0.007 s (nominal)
Sensitivity 0.04 to 0.09 V m s -2
Pressure Rating 1000 dbar (6000 dbar optional)
Temperature range -2 to 35 °C
Length 127 mm
Diameter (maximum) 9.5 mm
Materials Stainless/Teflon/Silicone

References cited

Osborn, T.R., 1974. Vertical profiling of velocity microstructure. Journal of Physical Oceanography, 4, 109-115.

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 .

Sea-Bird SBE 3F temperature sensor

Water temperature sensor primarily designed for use on the SBE 25 and 25plus Sealogger CTD systems but can be used as a component in custom oceanographic profiling systems or high-accuracy temperature-monitoring applications. The sensor operates over the range -5 to +35 °C and has an initial accuracy of +/-0.001°C. The sensor has a depth rating of 6800 m (aluminum housing) or 10500 m (titanium housing). The SBE 3F is an enhanced version of the SBE 3 temperature sensor.

Please see the SBE 3F specification sheet for further details.

Sea-Bird SBE 7 microstructure conductivity sensor

Microstructure conductivity sensor designed for use on marine profiling applications to characterise small scale ocean conductivity features. The sensor is primarily used for the determination of conductivity gradients but it is configured to respond to absolute conductivity as well. The SBE 7 has an accuracy typically within 0.005 S m -1 over periods of several hours and has a high speed micro-scale resolution of 3 dbar at 100 cycles m -1 (-3 dbar at 1000 Hz). The sensor has aluminium housing and a depth rating of 6800 m.

Please see the SBE 7 specification sheet for further details.

BODC Processing

VMP profiles provided by the originator in a structured Matlab format were converted into BODC internal format using standard BODC processing procedures. The following table shows how the variables within the Matlab file were mapped to appropriate BODC parameter codes:

Originator's Parameter Name Units Description BODC Parameter Code Units Comments
jr276vmp.press dbar Pressure (spatial co-ordinate) exerted by the water body by profiling pressure sensor and corrected to read zero at sea level PRESPR01 dbar -
jr276vmp.temp °C Temperature of the water body from the CTD sensor TEMPPR01 °C -
jr276vmp.salin Dimensionless Practical salinity of the water body by conductivity cell and computation using UNESCO 1983 algorithm, from the CTD sensors PSALPR01 Dimensionless -
jr276vmp.chi °C 2 s -1 Log10 temperature dissipation rate in the water body by turbulence profiler fast temperature sensor TDSSFT01 °C 2 s -1 The data have been transformed using Log10
jr276vmp.eps W kg -1 Log10 turbulent kinetic energy dissipation {epsilon} per unit volume of the water body by turbulence profiler shear sensor EPSIPM01 W kg -1 The data have been transformed using Log10

The reformatted data were visualised using the in-house EDSERPLO software. The data were screened and quality control flags were applied to data as necessary.

Originator's Data Processing

Sampling Strategy

Thirteen Vertical Microstructure Profiler (VMP) deployments were carried out successfully from 55 CTD stations. The general mode of microstructure operations consisted of a VMP deployment every four to eight CTD stations along section S3 and at alternate CTD stations on section SR1.

Data processing

Instrument calibrations for the VMP were applied and corrections for the fact the unit was not pumped, but no external calibration either to the ship CTD or water samples were made.

A matlab routine (finestructure_processing_routine.m) was used to process the seabird finestructure. The temperature and salinity data from the CTD sensors were processed as follows:

  1. Near-surface data below 10 dbar were removed to eliminate the noisy data at the near surface from influencing further processing.
  2. Conductivity, temperature and pressure data were then adjusted to account for the spatial displacement between the pressure sensor (at the VMP nose) and the CTD sensors (on the VMP body).
  3. The temperature, conductivity and pressure were despiked.
  4. The short-term mismatch between temperature and conductivity signals due to dissimilar sensor responses and the long-time mismatch between temperature and conductivity signals due to the thermal inertia of the conductivity cell were corrected.
  5. The effects of conductivity cell thermal expansion and pressure contraction were corrected.
  6. Low pass filters then corrected pressure, temperature, conductivity and salinity profiles to eliminate high frequency noise.
  7. Temperature, conductivity and salinity profiles were averaged in pressure bins of 0.5 dbar.

Another matlab routine (process_micro_jr276_v2.m) was then used to convert the data to real units and to calibrate the seabird data. The epsilon and chi values are estimated by integrating the power spectra of the shear and the microtemperature gradient, respectively. The data were averaged into regular 0.5 dbar bins. The pressure value used to start the extracted downcast was modified from that used on JC054, such that the pressure value at which to start the extracted downcast was increased from 5.25 dB to 6.25 dB. The change was required to account for the different deployment procedures. On this cruise the VMP was released when deeper in the water than on JC054, such that the profiler did not reach the previous criteria of a drop speed of 0.4 m s -1 at 5.25 dB

Lastly the data were averaged into 1 dbar bins and saved as a matlab structure file using a Matlab program (make_cruise_data_set.m). The average results from the two shear or microtemperature probes were used, unless a probe was noisy, in which case the noisy probe data was discarded.

Rockland Scientific Vertical Microstructure Profiler VMP 5500

A full ocean-depth untethered vertical microstructure turbulence profiler for the measurement of dissipation-scale turbulence along with temperature and conductivity for up to 5500 m depth. The instrument is fitted with pressure, temperature (SBE-3F) and conductivity (SBE-4C) sensors, three acceleration sensors, a PC104 computer data acquisition and communication system, anti-aliasing filters and a standard suite of microstructure sensors which includes two SPM-38-5 velocity shear probes, two FP07-38-5 fast thermistors and an optional microstructure conductivity probe (SBE7).

All microstructure sensors are held in the nose cone and can be exchanged or replaced in the field, without the need of disassemble the main pressure case of the VMP which can hold up to 6 microstructure probes in any combination. The main pressure case contains the pressure transducer as well as the accelerometers, electronics for signal conditioning A/D conversion and data logging, and is separated from the nose cone by a 38 mm thick bulkhead which prevents water penetration into the main pressure case.

The instrument has an aluminium frame with syntactic foam attached for floatation. Data are collected on the downcast and after reaching a pre-defined depth the profiler releases ballast weights so that the instrument becomes positively buoyant. The instrument rises to the surface with a nominal speed of 1.0 ms -1 . As a backup, there is a triple-redundancy emergency ballast release consisting of a corrosion trigger, time-out trigger and pressure rate-of-change trigger. The VMP 5500 has a strobe light and a radio beacon and can also be fitted with an Argos transmitter for locating the instrument after it has returned to the surface. The VMP 5500 was replaced by the VMP 6000 in 2010.

Please see the VMP 5500 specification sheet for further details.


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 JR20110409 (JR276, UKD-2.5)
Departure Date 2011-04-09
Arrival Date 2011-04-26
Principal Scientist(s)Andrew J Watson (University of East Anglia School of Environmental Sciences)
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 - 1089197 1089204 1089216 1089228 1089241 1089253 1089265 1089277 1089289 1089308 1089321 1089333 1089345 1089357 1089369 1716401 1716413 1716425 1716437 1716449 1716450 1716462 1716474 1716498 1716505 1716517 1716529 1718075 1718087 1718099 1718106 1718118 1718131 1718143 1718155 1718167 1718179 1718180 1718192 1718211 1718223 1718235

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) JR20111127 (JR254D, JR264, JR265) (31) JR20130317 (JR252B, JR272B, JR273A, JR281, UKD-4) (64) JR20140309 (JR293 Leg1, JR299 Leg1, UKD-5) (21) JR20150110 (JR305, JR306) (31)

Fixed Station Information

Station NameDrake Passage - WOCE SR1
CategoryOffshore route/traverse

World Ocean Circulation Experiment (WOCE) Southern Repeat Section 1 - South America to West Antarctic Peninsula

WOCE established a repeat hydrographic section across Drake Passage and designated it SR1 (also known as A21). The section is located between the Southern tip of South America and the West Antarctic Peninsula within a bounding box of 55° 19.40' S, 68° 15.80' W (North-Western corner) and 64° 8.52' S, 63° 4.80' W (South-Eastern corner).

A table of cruises which occupied SR1 is presented below with links to the relevant cruise reports (where available).

Cruise Country Start Date End Date
R/V Meteor 11/5 Germany 23-01-1990 08-03-1990
Polarstern ANT 10-5 Germany 08-08-1992 26-09-1992
R/V Vidal Gormaz 20VDSR0193_1 Chile 02-11-1993 25-12-1993
R/V Vidal Gormaz 20VDSR0194_1 Chile 08-11-1994 08-12-1994
R/V Vidal Gormaz 20VDSR0195_1 Chile 04-12-1995 15-12-1995
R/V Vidal Gormaz 20VDSR0196_1 Chile 28-11-1996 13-12-1996
R/V Vidal Gormaz 20VDSR0198_1 Chile 26-11-1998 15-12-1998
RRS James Clark Ross JR40 United Kingdom 15-03-1999 22-04-1999
RRS James Cook JC031 United Kingdom 03-02-2009 03-03-2009
RRS James Cook JC054 United Kingdom 28-11-2010 08-01-2011
RRS James Cook JC069 United Kingdom 31-01-2012 22-03-2012

Other Series linked to this Fixed Station for this cruise - 1716401 1716413 1716425 1716437 1716449 1716450 1716462 1716474 1716498 1716505 1716517 1716529

Other Cruises linked to this Fixed Station (with the number of series) - JC031 (142) JC054 (UKD-2) (45) JC069 (UKD-3) (8) JR19950320 (JR10) (128)

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 - 1089197 1089204 1089216 1089228 1089241 1089253 1089265 1089277 1089289 1089308 1089321 1089333 1089345 1089357 1089369 1716401 1716413 1716425 1716437 1716449 1716450 1716462 1716474 1716498 1716505 1716517 1716529 1717662 1717674 1717686 1717698 1717705 1717717 1717729 1717730 1717742 1717754 1717766 1717778 1717791 1717809 1717810 1717822 1717834 1717846 1717858 1717871 1717883 1717895 1717902 1717914 1717926 1717938 1717951 1717963 1717975 1717987 1717999 1718002 1718014 1718026 1718038 1718051 1718063

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) JR20130317 (JR252B, JR272B, JR273A, JR281, UKD-4) (175) 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