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Metadata Report for BODC Series Reference Number 815529


Metadata Summary

Data Description

Data Category CTD or STD cast
Instrument Type
NameCategories
Neil Brown MK3 CTD  CTD; water temperature sensor; salinity sensor; dissolved gas sensors
Chelsea Technologies Group Aquatracka fluorometer  fluorometers
Chelsea Technologies Group 2-pi PAR irradiance sensor  radiometers
Instrument Mounting lowered unmanned submersible
Originating Country United Kingdom
Originator Dr Alan Morris
Originating Organization Plymouth Marine Laboratory
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) North Sea Project 1987-1992
NSP Plumes Process Study
 

Data Identifiers

Originator's Identifier 1416
BODC Series Reference 815529
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 1989-02-13 23:09
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval 1.0 decibars
 

Spatial Co-ordinates

Latitude 51.44867 N ( 51° 26.9' N )
Longitude 0.42550 E ( 0° 25.5' E )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth 0.5 m
Maximum Sensor or Sampling Depth 8.43 m
Minimum Sensor or Sampling Height 2.87 m
Maximum Sensor or Sampling Height 10.8 m
Sea Floor Depth 11.3 m
Sea Floor Depth Source PEVENT
Sensor or Sampling Distribution Variable common depth - All sensors are grouped effectively at the same depth, but this depth varies significantly during the series
Sensor or Sampling 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 CODERankUnitsTitle
CPHLPR011Milligrams per cubic metreConcentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate >unknown phase] by in-situ chlorophyll fluorometer
IRRDPP011MicroEinsteins per square metre per secondDownwelling 2-pi scalar irradiance as photons of electromagnetic radiation (PAR wavelengths) in the water body by 2-pi scalar radiometer
POTMCV011Degrees CelsiusPotential temperature of the water body by computation using UNESCO 1983 algorithm
PRESPR011DecibarsPressure (spatial coordinate) exerted by the water body by profiling pressure sensor and correction to read zero at sea level
PSALST011DimensionlessPractical salinity of the water body by CTD and computation using UNESCO 1983 algorithm
SIGTPR011Kilograms per cubic metreSigma-theta of the water body by CTD and computation from salinity and potential temperature using UNESCO algorithm
TEMPST011Degrees CelsiusTemperature of the water body by CTD or STD

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

These data have no specific confidentiality restrictions for users. However, users must acknowledge data sources as it is not ethical to publish data without proper attribution. Any publication or other output resulting from usage of the data should include an acknowledgment.

If the Information Provider does not provide a specific attribution statement, or if you are using Information from several Information Providers and multiple attributions are not practical in your product or application, you may consider using the following:

"Contains public sector information licensed under the Open Government Licence v1.0."


Narrative Documents

Neil Brown MK3 CTD

The Neil Brown MK3 conductivity-temperature-depth (CTD) profiler consists of an integral unit containing pressure, temperature and conductivity sensors with an optional dissolved oxygen sensor in a pressure-hardened casing. The most widely used variant in the 1980s and 1990s was the MK3B. An upgrade to this, the MK3C, was developed to meet the requirements of the WOCE project.

The MK3C includes a low hysteresis, titanium strain gauge pressure transducer. The transducer temperature is measured separately, allowing correction for the effects of temperature on pressure measurements. The MK3C conductivity cell features a free flow, internal field design that eliminates ducted pumping and is not affected by external metallic objects such as guard cages and external sensors.

Additional optional sensors include pH and a pressure-temperature fluorometer. The instrument is no longer in production, but is supported (repair and calibration) by General Oceanics.

Specifications

These specification apply to the MK3C version.

Pressure Temperature Conductivity
Range

6500 m

3200 m (optional)

-3 to 32°C 1 to 6.5 S cm-1
Accuracy

0.0015% FS

0.03% FS < 1 msec

0.0005°C

0.003°C < 30 msec

0.0001 S cm-1

0.0003 S cm-1 < 30 msec

Further details can be found in the specification sheet.

Aquatracka fluorometer

The Chelsea Instruments Aquatracka is a logarithmic response fluorometer. It uses a pulsed (5.5 Hz) xenon light source discharging between 320 and 800 nm through a blue filter with a peak transmission of 420 nm and a bandwidth at half maximum of 100 nm. A red filter with sharp cut off, 10% transmission at 664 nm and 678 nm, is used to pass chlorophyll-a fluorescence to the sample photodiode.

The instrument may be deployed either in a through-flow tank, on a CTD frame or moored with a data logging package.

Further details can be found in the manufacturer's specification sheet.

Chelsea Technologies Photosynthetically Active Radiation (PAR) Irradiance Sensor

This sensor was originally designed to assist the study of marine photosynthesis. With the use of logarithmic amplication, the sensor covers a range of 6 orders of magnitude, which avoids setting up the sensor range for the expected signal level for different ambient conditions.

The sensor consists of a hollow PTFE 2-pi collector supported by a clear acetal dome diverting light to a filter and photodiode from which a cosine response is obtained. The sensor can be used in moorings, profiling or deployed in towed vehicles and can measure both upwelling and downwelling light.

Specifications

Operation depth 1000 m
Range 2000 to 0.002 µE m-2 s-1
Angular Detection Range ± 130° from normal incidence
Relative Spectral Sensitivity

flat to ± 3% from 450 to 700 nm

down 8% of 400 nm and 36% at 350 nm

Further details can be found in the manufacturer's specification sheet.

RRS Challenger 46 CTD Data Documentation

Instrumentation

The CTD unit was a Neil Brown Mk. 3 incorporating a pressure sensor, conductivity cell, platinum resistance thermometer and a Beckmann dissolved oxygen sensor. This was mounted vertically in the centre of a protective cage approximately 1.5m square.

Attached to bars of the frame were an Aquatracka logarithmic response fluorometer and a Seatech red light (661 nm) transmissometer with a 25 cm path length.

Above the frame was a General Oceanics rosette sampler fitted with 12, 10 litre water bottles. These comprised a mixture of Niskin, general purpose Go-Flo and ultra-clean teflon lined Go-Flo bottles as dictated by sampling requirements. The base of the bottles were 0.75m above and the tops 1.55m above the pressure head. One bottle was fitted with a holder for twin reversing thermometers mounted 1.38m above the CTD temperature sensor.

Above the rosette was a PML 2-pi PAR (photosynthetically active radiation) sensor pointing upwards to measure downwelling irradiance. A second 2-pi PAR sensor, pointing downwards, was fitted to the bottom of the cage to measure upwelling irradiance. It should be noted that these sensors were vertically separated by 2m with the upwelling sensor 0.2m below the pressure head and the downwelling sensor 1.75m above it.

No account has been taken of rig geometry in the compilation of the CTD data set. However, all water bottle sampling depths have been corrected for rig geometry and represent the true position of the midpoint of the water bottle in the water column.

Operational procedure and data logging

On each cast the CTD was lowered to a depth of approximately 5 metres and held until the oxygen reading stabilised. It was then raised to the surface and lowered continuously at 0.5 to 1 m/s to as close as possible to the sea floor. The upcast was done in stages between the bottle firing depths.

Data were logged by the Research Vessel Services ABC data logging system. The deck unit outputs were sampled at 32 Hz by a microprocessor interface (the Level A) which passed time stamped averaged cycles at 1 Hz to a Sun workstation (the Level C) via a buffering system (the Level B).

Data processing

The raw data comprised ADC counts. These were converted into engineering units (Volts for PAR meters, fluorometer and transmissometer: ml/l for oxygen: mmho/cm for conductivity: °C for temperature) by the application of laboratory determined calibrations and salinity was computed using the algorithm in Fofonoff and Millard (1983). The data were submitted to BODC in this form.

Within BODC the data were reformatted on an IBM main-frame. At this stage transmissometer air readings recorded during the cruise were used to correct the transmissometer voltage to the manufacturer's specified voltage by ratio. The voltages were then converted to percentage transmittance (multiplied by 20.0) and dissolved oxygen converted to µM (multiplied by 44.66).

Next the data were loaded onto a Silicon Graphics workstation. A sophisticated interactive screening program was used to delimit the downcast, mark the depth range of water bottle firings and flag any spikes on all of the data channels.

The data were returned to the IBM and the downcasts loaded into a database under the Oracle relational database management system. At this stage percentage transmittance was converted to attenuance to eliminate the influence of instrument path length using the equation:

Attenuance = -4.0 * loge (% trans/100)

Calibration sample data were merged into the database and files of sample value against CTD reading at the bottle depth were prepared for the Principal Investigators to determine the calibrations. Due allowance was made for rig geometry. Note that CTD downcast values were generally used although the bottles were fired on the upcast. The validity of an assumed static water column for the duration of the cast was checked on the graphics workstation and upcast values substituted if necessary.

Sigma-T values were calculated using the algorithm presented in Fofonoff and Millard (1983).

Calibrations

For each cast the mean pressure reading logged whilst the instrument was in air was determined. The average of these, determined as -1.8 db, was added to each pressure value.

Two digital reversing thermometers were fired at the bottom of each cast. The mean difference, determined for all casts on the cruise, between the averaged calibrated readings and the CTD temperature, 0.004 °C, was added to the CTD temperatures.

A sample was taken from the bottom bottle of each cast and salinity was determined using a Guildline Autosal. The mean difference, determined for all casts on the cruise, between the bottle values and the CTD salinity, 0.033 PSU, was added to the CTD salinities.

No chlorophyll calibration was possible for this cruise. The calibration from the following survey cruise, Challenger 47, has been applied to give the best possible estimate of the distribution of chlorophyll with depth.

No dissolved oxygen calibration was possible for this cruise. Consequently, all dissolved oxygen data have been flagged suspect.

Attenuance was regressed against total suspended matter determinations to derive the equation below to allow attenuance to be expressed in terms of suspended matter.

Total suspended matter (mg/l) = (Attenuance-0.505)/0.309 (n=6; r2=98.6%)

The PAR meters were calibrated using the following laboratory determined calibrations:

Upwelling: PAR (µE/m2/s) = exp (-5.151*V + 6.6035) * 0.0375
Downwelling: PAR (µE/m2/s) = exp (-5.122*V + 6.5739) * 0.0375

Warnings

The chlorophyll calibration has been taken from another cruise.

There are no calibrated dissolved oxygen data.

References

Fofonoff, N.P and Millard, R.C. Jr. (1983). Algorithms for the computation of fundamental properties of sea water.


Project Information

North Sea Project

The North Sea Project (NSP) was the first Marine Sciences Community Research project of the Natural Environment Research Council (NERC). It evolved from a NERC review of shelf sea research, which identified the need for a concerted multidisciplinary study of circulation, transport and production.

The ultimate aim of the NERC North Sea Project was the development of a suite of prognostic water quality models to aid management of the North Sea. To progress towards water quality models, three intermediate objectives were pursued in parallel:

  • Production of a 3-D transport model for any conservative passive constituent, incorporating improved representations of the necessary physics - hydrodynamics and dispersion;
  • Identifying and quantifying non-conservative processes - sources and sinks determining the cycling and fate of individual constituents;
  • Defining a complete seasonal cycle as a database for all the observational studies needed to formulate, drive and test models.

Proudman Oceanographic Laboratory hosted the project, which involved over 200 scientists and support staff from NERC and other Government funded laboratories, as well as seven universities and polytechnics.

The project ran from 1987 to 1992, with marine field data collection between April 1988 and October 1989. One shakedown (CH28) and fifteen survey cruises (Table 1), each lasting 12 days and following the same track, were repeated monthly. The track selected covered the summer-stratified waters of the north and the homogeneous waters in the Southern Bight in about equal lengths together with their separating frontal band from Flamborough head to Dogger Bank, the Friesian Islands and the German Bight. Mooring stations were maintained at six sites for the duration of the project.

Table 1: Details of NSP Survey Cruises on RRS Challenger
Cruise No. Date
CH28 29/04/88 - 15/05/88
CH33 04/08/88 - 16/08/88
CH35 03/09/88 - 15/09/88
CH37 02/10/88 - 14/10/88
CH39 01/11/88 - 13/11/88
CH41 01/12/88 - 13/12/88
CH43 30/12/88 - 12/01/89
CH45 28/01/89 - 10/02/89
CH47 27/02/89 - 12/03/89
CH49 29/03/89 - 10/04/89
CH51 27/04/89 - 09/05/89
CH53 26/05/89 - 07/06/89
CH55 24/06/89 - 07/07/89
CH57 24/07/89 - 06/08/89
CH59 23/08/89 - 04/09/89
CH61 21/09/89 - 03/10/89

Alternating with the survey cruises were process study cruises (Table 2), which investigated some particular aspect of the science of the North Sea. These included fronts (nearshore, circulation and mixing), sandwaves and sandbanks, plumes (Humber, Wash, Thames and Rhine), resuspension, air-sea exchange, primary productivity and blooms/chemistry.

Table 2: Details of NSP Process cruises on RRS Challenger
Cruise No. Date Process
CH34 18/08/88 - 01/09/88 Fronts - nearshore
CH36 16/09/88 - 30/09/88 Fronts - mixing
CH56 08/07/89 - 22/07/89 Fronts - circulation
CH58 07/08/89 - 21/08/89 Fronts - mixing
CH38 24/10/88 - 31/10/88 Sandwaves
CH40 15/11/88 - 29/11/88 Sandbanks
CH42 15/12/88 - 29/12/88 Plumes/Sandbanks
CH46 12/02/89 - 26/02/89 Plumes/Sandwaves
CH44 13/01/89 - 27/01/89 Resuspension
CH52 11/05/89 - 24/05/89 Resuspension
CH60 06/09/89 - 19/09/89 Resuspension
CH48 13/03/89 - 27/03/89 Air/sea exchanges
CH62 05/10/89 - 19/10/89 Air/sea exchanges
CH50 12/04/89 - 25/04/89 Blooms/chemistry
CH54 09/06/89 - 22/06/89 Production

In addition to the main data collection period, a series of cruises took place between October 1989 and October 1990 that followed up work done on previous cruises (Table 3). Process studies relating to blooms, plumes (Humber, Wash and Rhine), sandwaves and the flux of contaminants through the Dover Strait were carried out as well as two `survey' cruises.

Table 3: Details of NSP `Follow up' cruises on RRS Challenger
Cruise No. Date Process
CH62A 23/10/89 - 03/11/89 Blooms
CH64 03/04/90 - 03/05/90 Blooms
CH65 06/05/90 - 17/05/90 Humber plume
CH66A 20/05/90 - 31/05/90 Survey
CH66B 03/06/90 - 18/06/90 Contaminants through Dover Strait
CH69 26/07/90 - 07/08/90 Resuspension/Plumes
CH72A 20/09/90 - 02/10/90 Survey
CH72B 04/10/90 - 06/10/90 Sandwaves/STABLE
CH72C 06/10/90 - 19/10/90 Rhine plume

The data collected during the observational phase of the North Sea Project comprised one of the most detailed sets of observations ever undertaken in any shallow shelf sea at that time.


North Sea Project Plumes Process Study

Estuaries are important boundary sources of some metals and nutrients in the North Sea and distinctive dispersions in their plumes such as the Humber, Wash and Thames outflow, required special study.

Specific objectives included

  • the definition of the spatial and temporal characteristics of the Humber/Wash and Thames by repetitive sampling for selected conservative and non-conservative constituents around a grid enclosing the plume
  • the determination of the transport pathways for non-conservative constituents in relation to suspended particle/water exchanges
  • the characterisation of nutrient and metal transfer across the sediment/water interface

These latter two were carried out through controlled experiments on-board ship. Nutrient flows were correlated with river flows using all available data. A 2-dimensional hydrodynamic model was used to calculate nutrient fluxes and mass balances.


Data Activity or Cruise Information

Cruise

Cruise Name CH46
Departure Date 1989-02-12
Arrival Date 1989-02-20
Principal Scientist(s)Alan W Morris (Plymouth Marine Laboratory)
Ship RRS Challenger

Complete Cruise Metadata Report is available here


Fixed Station Information

Fixed Station Information

Station NameNorth Sea Project Plumes Processes - Anchor: Thames Estuary
CategoryOffshore area
Latitude51° 26.94' N
Longitude0° 25.46' E
Water depth below MSL13.0 m

North Sea Project Plumes Process Study - Anchor Station: Thames Estuary

Hourly casts were performed on 13-14 February 1989 over a 24 hour period at a selected anchor station located off Gravesend. The anchor station was visited a second time during the course of the same cruise.

The nominal coordinates for this station are:

Latitude Longitude
51.4490°N 0.4244°E

The station lies within a box of mean water depth 13m with the following co-ordinates:

Box Corner Latitude Longitude
North-east corner 51.4497°N 0.4257°E
South-west corner 51.4485°N 0.4225°E

Related Fixed Station activities are detailed in Appendix 1


BODC Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:

Flag Description
Blank Unqualified
< Below detection limit
> In excess of quoted value
A Taxonomic flag for affinis (aff.)
B Beginning of CTD Down/Up Cast
C Taxonomic flag for confer (cf.)
D Thermometric depth
E End of CTD Down/Up Cast
G Non-taxonomic biological characteristic uncertainty
H Extrapolated value
I Taxonomic flag for single species (sp.)
K Improbable value - unknown quality control source
L Improbable value - originator's quality control
M Improbable value - BODC quality control
N Null value
O Improbable value - user quality control
P Trace/calm
Q Indeterminate
R Replacement value
S Estimated value
T Interpolated value
U Uncalibrated
W Control value
X Excessive difference

SeaDataNet Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:

Flag Description
0 no quality control
1 good value
2 probably good value
3 probably bad value
4 bad value
5 changed value
6 value below detection
7 value in excess
8 interpolated value
9 missing value
A value phenomenon uncertain
B nominal value
Q value below limit of quantification

Appendix 1: North Sea Project Plumes Processes - Anchor: Thames Estuary

Related series for this Fixed Station are presented in the table below. Further information can be found by following the appropriate links.

If you are interested in these series, please be aware we offer a multiple file download service. Should your credentials be insufficient for automatic download, the service also offers a referral to our Enquiries Officer who may be able to negotiate access.

Series IdentifierData CategoryStart date/timeStart positionCruise
815382CTD or STD cast1989-02-13 09:21:0051.44883 N, 0.42483 ERRS Challenger CH46
815394CTD or STD cast1989-02-13 10:08:0051.449 N, 0.425 ERRS Challenger CH46
815401CTD or STD cast1989-02-13 11:05:0051.44917 N, 0.42517 ERRS Challenger CH46
815413CTD or STD cast1989-02-13 12:11:0051.44933 N, 0.42483 ERRS Challenger CH46
2079791Water sample data1989-02-13 12:16:3551.44937 N, 0.4248 ERRS Challenger CH46
2080270Water sample data1989-02-13 12:16:3551.44937 N, 0.4248 ERRS Challenger CH46
815425CTD or STD cast1989-02-13 13:18:0051.44933 N, 0.425 ERRS Challenger CH46
2079809Water sample data1989-02-13 13:22:3051.44939 N, 0.42495 ERRS Challenger CH46
2080282Water sample data1989-02-13 13:22:3051.44939 N, 0.42495 ERRS Challenger CH46
815437CTD or STD cast1989-02-13 14:13:0051.44967 N, 0.42433 ERRS Challenger CH46
2079810Water sample data1989-02-13 14:18:3251.44971 N, 0.4243 ERRS Challenger CH46
2080294Water sample data1989-02-13 14:18:3251.44971 N, 0.4243 ERRS Challenger CH46
815449CTD or STD cast1989-02-13 15:07:0051.44867 N, 0.424 ERRS Challenger CH46
2079822Water sample data1989-02-13 15:11:2351.4487 N, 0.424 ERRS Challenger CH46
2080301Water sample data1989-02-13 15:11:2351.4487 N, 0.424 ERRS Challenger CH46
815450CTD or STD cast1989-02-13 16:07:0051.4485 N, 0.424 ERRS Challenger CH46
2079834Water sample data1989-02-13 16:09:2351.4485 N, 0.42408 ERRS Challenger CH46
2080313Water sample data1989-02-13 16:09:2351.4485 N, 0.42408 ERRS Challenger CH46
815462CTD or STD cast1989-02-13 17:05:0051.4485 N, 0.42433 ERRS Challenger CH46
2079846Water sample data1989-02-13 17:07:5851.4485 N, 0.42437 ERRS Challenger CH46
2080325Water sample data1989-02-13 17:07:5851.4485 N, 0.42437 ERRS Challenger CH46
2080896Water sample data1989-02-13 17:07:5851.4485 N, 0.42437 ERRS Challenger CH46
815474CTD or STD cast1989-02-13 18:04:0051.44867 N, 0.424 ERRS Challenger CH46
2079858Water sample data1989-02-13 18:07:1951.4487 N, 0.42392 ERRS Challenger CH46
2080337Water sample data1989-02-13 18:07:1951.4487 N, 0.42392 ERRS Challenger CH46
2080903Water sample data1989-02-13 18:07:1951.4487 N, 0.42392 ERRS Challenger CH46
815486CTD or STD cast1989-02-13 19:06:0051.44867 N, 0.425 ERRS Challenger CH46
2079871Water sample data1989-02-13 19:09:1751.4487 N, 0.42495 ERRS Challenger CH46
2080349Water sample data1989-02-13 19:09:1751.4487 N, 0.42495 ERRS Challenger CH46
2080915Water sample data1989-02-13 19:09:1751.4487 N, 0.42495 ERRS Challenger CH46
815498CTD or STD cast1989-02-13 20:12:0051.449 N, 0.42483 ERRS Challenger CH46
2079883Water sample data1989-02-13 20:17:4051.44897 N, 0.42481 ERRS Challenger CH46
2080350Water sample data1989-02-13 20:17:4051.44897 N, 0.42481 ERRS Challenger CH46
2080927Water sample data1989-02-13 20:17:4051.44897 N, 0.42481 ERRS Challenger CH46
815505CTD or STD cast1989-02-13 21:14:0051.44917 N, 0.42467 ERRS Challenger CH46
2079895Water sample data1989-02-13 21:20:3051.4492 N, 0.42471 ERRS Challenger CH46
2080362Water sample data1989-02-13 21:20:3051.4492 N, 0.42471 ERRS Challenger CH46
2080939Water sample data1989-02-13 21:20:3051.4492 N, 0.42471 ERRS Challenger CH46
815517CTD or STD cast1989-02-13 22:11:0051.449 N, 0.42533 ERRS Challenger CH46
2079902Water sample data1989-02-13 22:14:3851.44899 N, 0.42541 ERRS Challenger CH46
2080374Water sample data1989-02-13 22:14:3851.44899 N, 0.42541 ERRS Challenger CH46
2080940Water sample data1989-02-13 22:14:3851.44899 N, 0.42541 ERRS Challenger CH46
2079914Water sample data1989-02-13 23:12:5651.44865 N, 0.42558 ERRS Challenger CH46
2080386Water sample data1989-02-13 23:12:5651.44865 N, 0.42558 ERRS Challenger CH46
2080952Water sample data1989-02-13 23:12:5651.44865 N, 0.42558 ERRS Challenger CH46
815530CTD or STD cast1989-02-14 00:07:0051.44867 N, 0.42567 ERRS Challenger CH46
2079926Water sample data1989-02-14 00:11:4051.44873 N, 0.42568 ERRS Challenger CH46
2080398Water sample data1989-02-14 00:11:4051.44873 N, 0.42568 ERRS Challenger CH46
2080964Water sample data1989-02-14 00:11:4051.44873 N, 0.42568 ERRS Challenger CH46
815542CTD or STD cast1989-02-14 01:08:0051.4485 N, 0.42533 ERRS Challenger CH46
2079938Water sample data1989-02-14 01:12:1751.44858 N, 0.42539 ERRS Challenger CH46
2080405Water sample data1989-02-14 01:12:1751.44858 N, 0.42539 ERRS Challenger CH46
2080976Water sample data1989-02-14 01:12:1751.44858 N, 0.42539 ERRS Challenger CH46
815554CTD or STD cast1989-02-14 02:05:0051.449 N, 0.4225 ERRS Challenger CH46
815566CTD or STD cast1989-02-14 03:05:0051.44933 N, 0.423 ERRS Challenger CH46
815578CTD or STD cast1989-02-14 04:06:0051.44933 N, 0.42317 ERRS Challenger CH46
815591CTD or STD cast1989-02-14 05:03:0051.44933 N, 0.423 ERRS Challenger CH46
815609CTD or STD cast1989-02-14 06:05:0051.44917 N, 0.42317 ERRS Challenger CH46
815610CTD or STD cast1989-02-14 07:04:0051.44883 N, 0.42317 ERRS Challenger CH46
815622CTD or STD cast1989-02-14 08:09:0051.44883 N, 0.425 ERRS Challenger CH46
815634CTD or STD cast1989-02-14 09:08:0051.449 N, 0.42483 ERRS Challenger CH46
815646CTD or STD cast1989-02-14 10:05:0051.44917 N, 0.42467 ERRS Challenger CH46