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Metadata Report for BODC Series Reference Number 1245774


Metadata Summary

Data Description

Data Category Water sample data
Instrument Type
NameCategories
Niskin bottle  discrete water samplers
Instrument Mounting lowered unmanned submersible
Originating Country United Kingdom
Originator Dr David Hydes
Originating Organization Institute of Oceanographic Sciences Deacon Laboratory (now National Oceanography Centre, Southampton)
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) North Sea Project 1987-1992
 

Data Identifiers

Originator's Identifier CH57_CTD_NUTS_12:2429
BODC Series Reference 1245774
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 1989-07-27 05:26
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval -
 

Spatial Co-ordinates

Latitude 52.61710 N ( 52° 37.0' N )
Longitude 3.77581 E ( 3° 46.5' E )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth 0.5 m
Maximum Sensor or Sampling Depth 18.6 m
Minimum Sensor or Sampling Height 9.5 m
Maximum Sensor or Sampling Height 27.6 m
Sea Floor Depth 28.1 m
Sea Floor Depth Source -
Sensor or Sampling Distribution Unspecified -
Sensor or Sampling Depth Datum Unspecified -
Sea Floor Depth Datum Unspecified -
 

Parameters

BODC CODERankUnitsTitle
ADEPZZ011MetresDepth (spatial coordinate) relative to water surface in the water body
AMONAATX1Micromoles per litreConcentration of ammonium {NH4+ CAS 14798-03-9} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis
BOTTFLAG1Not applicableSampling process quality flag (BODC C22)
NTRIAATX1Micromoles per litreConcentration of nitrite {NO2- CAS 14797-65-0} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis
NTRZAATX1Micromoles per litreConcentration of nitrate+nitrite {NO3+NO2} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis
PHOSAATX1Micromoles per litreConcentration of phosphate {PO43- CAS 14265-44-2} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis
SAMPRFNM1DimensionlessSample reference number
SLCAAATX1Micromoles per litreConcentration of silicate {SiO44- CAS 17181-37-2} per unit volume of the water body [dissolved plus reactive particulate phase] by colorimetric autoanalysis

Definition of BOTTFLAG

BOTTFLAGDefinition
0The sampling event occurred without any incident being reported to BODC.
1The filter in an in-situ sampling pump physically ruptured during sample resulting in an unquantifiable loss of sampled material.
2Analytical evidence (e.g. surface water salinity measured on a sample collected at depth) indicates that the water sample has been contaminated by water from depths other than the depths of sampling.
3The feedback indicator on the deck unit reported that the bottle closure command had failed. General Oceanics deck units used on NERC vessels in the 80s and 90s were renowned for reporting misfires when the bottle had been closed. This flag is also suitable for when a trigger command is mistakenly sent to a bottle that has previously been fired.
4During the sampling deployment the bottle was fired in an order other than incrementing rosette position. Indicative of the potential for errors in the assignment of bottle firing depth, especially with General Oceanics rosettes.
5Water was reported to be escaping from the bottle as the rosette was being recovered.
6The bottle seals were observed to be incorrectly seated and the bottle was only part full of water on recovery.
7Either the bottle was found to contain no sample on recovery or there was no bottle fitted to the rosette position fired (but SBE35 record may exist).
8There is reason to doubt the accuracy of the sampling depth associated with the sample.
9The bottle air vent had not been closed prior to deployment giving rise to a risk of sample contamination through leakage.

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

Niskin Bottle

The Niskin bottle is a device used by oceanographers to collect subsurface seawater samples. It is a plastic bottle with caps and rubber seals at each end and is deployed with the caps held open, allowing free-flushing of the bottle as it moves through the water column.

Standard Niskin

The standard version of the bottle includes a plastic-coated metal spring or elastic cord running through the interior of the bottle that joins the two caps, and the caps are held open against the spring by plastic lanyards. When the bottle reaches the desired depth the lanyards are released by a pressure-actuated switch, command signal or messenger weight and the caps are forced shut and sealed, trapping the seawater sample.

Lever Action Niskin

The Lever Action Niskin Bottle differs from the standard version, in that the caps are held open during deployment by externally mounted stainless steel springs rather than an internal spring or cord. Lever Action Niskins are recommended for applications where a completely clear sample chamber is critical or for use in deep cold water.

Clean Sampling

A modified version of the standard Niskin bottle has been developed for clean sampling. This is teflon-coated and uses a latex cord to close the caps rather than a metal spring. The clean version of the Levered Action Niskin bottle is also teflon-coated and uses epoxy covered springs in place of the stainless steel springs. These bottles are specifically designed to minimise metal contamination when sampling trace metals.

Deployment

Bottles may be deployed singly clamped to a wire or in groups of up to 48 on a rosette. Standard bottles have a capacity between 1.7 and 30 L, while Lever Action bottles have a capacity between 1.7 and 12 L. Reversing thermometers may be attached to a spring-loaded disk that rotates through 180° on bottle closure.

Nutrients as part of the North Sea Project

Document History

Converted from CDROM documentation.

Sampling strategy and methodology

Survey cruises

Duplicate samples were collected in 30 ml 'Elkay Dilu-Vials' from each CTD bottle. Samples were stored in a refrigerator at 4°C between collection and analysis and usually analysed within four hours of collection. Initially, two aliquots from one the samples were analysed. If a problem was considered to have occurred, the second sample was analysed. The samples were unfiltered and no preservative was added.

The samples were analysed using a ChemLab AA-II segmented continuous flow autoanalyser. The chemistries used were similar to those described in Grasshof et al (1983). Peak heights were interpreted using a ChemLab PHA interface and software running on an IBM PS2/50. Each run was calibrated by measurement of a set of 4 standards run in duplicate at the start of the run to which a third order polynomial, forced to pass through the origin, was fitted.

Analyses were made for nitrate+nitrite, nitrate, phosphate, silicon and (for Challenger 39 and subsequent cruises), ammonia.

The replicate analyses were supplied to BODC. Values were subjected to a simple range check with seasonally varying tolerances and a check was made to identify samples with excessive differences between replicates. Any problems identified were resolved by interaction with the Principal Investigator and erroneous values corrected or deleted from the data set. All remaining replicates were then averaged.

In general, the autoanalyser worked well. The only problems reported were random variations in Cu/Cd reduction coil efficiency (between 70 and 90%) on two cruises (Challenger 33 and Challenger 72A) and occasional baseline drift and spiking, mostly on phosphate and nitrite.

During Challenger 33, problems were encountered with the PS2 processing software and the nutrient concentrations were obtained by manual determination of peak heights from chart recorder output.

The survey data set is believed to be of good quality and has borne up well to intercomparison with data from other sources during the compilation of synthesised data sets by the ICES hydrographer.

Process cruises

Analyses for the major nutrients (nitrate+nitrite, phosphate, nitrite and silicate) were undertaken on CTD water bottle samples for the following process cruises: Challenger 44, Challenger 48, Challenger 50, Challenger 52, Challenger 60, Challenger 62 and Challenger 72C.

For Challenger 50 and Challenger 72C the survey protocols, including the determination of ammonia, were followed exactly by an analyst who had also participated in survey cruises. Quality control was undertaken by the analyst prior to submission to BODC and the data are believed to be of the same good quality as the survey data.

For the resuspension cruises, Challenger 44, Challenger 52 and Challenger 60, the survey protocols were generally followed except the concentrations were computed manually and all quality control was done prior to submission to BODC. The analyst had participated in survey cruises.

On two of these cruises, Challenger 52 and Challenger 60 ammonia was determined by flow injection analysis. The method is based upon the conversion of the ammonium ion into gaseous ammonia across a hydrophobic membrane and is fully described in Willason and Johnson (1986) and Howland et al.

There are no reasons to suspect the quality of the data from these cruises.

For Challenger 48 and 62 the analyses were done using the same equipment but details of the protocols followed, including quality control procedures, are unknown.

Feedback to BODC indicates that the nitrate data from Challenger 48 appear to be high by up to a factor of 10 and that the phosphate data do not exhibit the expected relationships with other parameters. However, it is not possible to categorically state that the data are in error because the cruises were working in waters strongly influenced by the Rhine plume.

WARNING. It is strongly recommended that the nutrient data from Challenger 48 and Challenger 62 be used with caution.

References

Grasshof, K., Erhardt, M. and Kremling, K. (1983). Methods of sea water analysis, 2nd edition. Verlag Chemie, Weinheim, 419pp..

Howland, R.J.M., A.J. Bale and P.G. Watson. Plymouth Marine Laboratory Estuarine Processes Group Analytical Methods Handbook.

Willason, S.W. and K.S. Johnson (1986). A rapid, highly sensitive technique for the determination of ammonia in sea water. Mar. Biol. 91, 285-290.


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.


Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 1989-07-27
End Date (yyyy-mm-dd) 1989-07-27
Organization Undertaking ActivityUniversity of Wales, Bangor School of Ocean Sciences (now Bangor University School of Ocean Sciences)
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierCH57_CTD_2429
Platform Categorylowered unmanned submersible

BODC Sample Metadata Report for CH57_CTD_2429

Sample reference number Nominal collection volume(l) Bottle rosette position Bottle firing sequence number Minimum pressure sampled (dbar) Maximum pressure sampled (dbar) Depth of sampling point (m) Bottle type Sample quality flag Bottle reference Comments
305458   10.00       22.80   23.00   18.60 Niskin bottle No problem reported    
305461   10.00       12.90   13.00    8.70 Niskin bottle No problem reported    
305475   10.00        3.60    4.20     .50 Niskin bottle No problem reported    

Please note:the supplied parameters may not have been sampled from all the bottle firings described in the table above. Cross-match the Sample Reference Number above against the SAMPRFNM value in the data file to identify the relevant metadata.

Related Data Activity activities are detailed in Appendix 1

Cruise

Cruise Name CH57
Departure Date 1989-07-24
Arrival Date 1989-08-06
Principal Scientist(s)Paul Tett (University of Wales, Bangor School of Ocean Sciences)
Ship RRS Challenger

Complete Cruise Metadata Report is available here


Fixed Station Information

Fixed Station Information

Station NameNSP Survey F and CTD Site AE
CategoryOffshore area
Latitude52° 37.00' N
Longitude3° 46.00' E
Water depth below MSL30.0 m

North Sea Project Survey Mooring Site F and CTD Site AE

Site F was one of six fixed stations where moorings were deployed during the North Sea Project survey. This location is also one of 123 North Sea Project CTD Sites.

The site was situated in a region of strong tidal currents, up to a maximum of 1.0 m/s and in relatively shallow (30 m) water. These factors produced well mixed conditions through the water column, throughout the year.

The rigs deployed here line within a box bounded by co-ordinates 52° 36.50'N, 003° 45.20'E at the southwest corner and 52° 37.10'N, 003° 46.14'E at the northeast corner. The magnetic variation at this site was 3.1°W.

The deployment history is summarised below:

Rig ID Meter
Type
Meter
Height
(m)
Start
Date
Data
Return
(Days)
Comments
C33FC CM (S4) 12.0 05/08/88 30.6 Good data
CM
(Aanderaa)
7.0
C35FC CM (S4) 12.7 06/09/88 26.4 Good data
CM
(Aanderaa)
7.0
C37FC CM (S4) 12.0 04/10/88 28.6 Good data
CM
(Aanderaa)
7.0
C39FC CM (S4) 12.0 20/11/88 29.8 Good data
CM
(Aanderaa)
7.0
C43FC CM (S4) 12.0 07/01/89 22.0 Good data
CM
(Aanderaa)
7.0 9.6 Short record
C51FC CM (S4) 12.0 28/04/89 0.0 No data recorded
CM
(Aanderaa)
7.0 0.7 Velocity record short, rotor fouled by fishing line
29.6 Good data for Temperature, Conductivity and Pressure
C53FC CM (S4) 12.0 29/05/89 27.1 Good data
CM
(Aanderaa)
7.0
C55FC CM (S4) 12.0 25/06/89 0.0 Data corrupt
CM
(Aanderaa)
7.0 30.1 Good data
C57FC CM (S4) 12.0 27/07/89 28.2 Good data
CM
(Aanderaa)
7.0
C59FC CM (S4) 12.0 25/08/89 27.3 Good data
CM
(Aanderaa)
7.0

Related Fixed Station activities are detailed in Appendix 2


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
Q value below limit of quantification

Appendix 1: CH57_CTD_2429

Related series for this Data Activity 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
1709232Water sample data1989-07-27 05:26:0052.6171 N, 3.77581 ERRS Challenger CH57
1864570Water sample data1989-07-27 05:26:0052.6171 N, 3.77581 ERRS Challenger CH57

Appendix 2: NSP Survey F and CTD Site AE

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
782725CTD or STD cast1988-05-09 00:21:0053.51767 N, 0.68333 ERRS Challenger CH28
768977CTD or STD cast1988-08-05 06:33:0052.6215 N, 3.76883 ERRS Challenger CH33
248590Currents -subsurface Eulerian1988-08-05 14:10:0052.6117 N, 3.7533 ENot applicable
591959Currents -subsurface Eulerian1988-08-05 14:11:0052.6117 N, 3.7533 ENot applicable
769169CTD or STD cast1988-08-07 08:30:0052.622 N, 3.77583 ERRS Challenger CH33
783010CTD or STD cast1988-09-04 02:17:0052.61267 N, 3.7635 ERRS Challenger CH35
783243CTD or STD cast1988-09-06 01:01:0052.62033 N, 3.76667 ERRS Challenger CH35
592047Currents -subsurface Eulerian1988-09-06 06:27:0052.6083 N, 3.7533 ENot applicable
248750Currents -subsurface Eulerian1988-09-06 06:30:0052.6083 N, 3.7533 ENot applicable
784246CTD or STD cast1988-10-02 17:55:0052.62133 N, 3.76167 ERRS Challenger CH37
784467CTD or STD cast1988-10-04 20:20:0052.6175 N, 3.76617 ERRS Challenger CH37
248762Currents -subsurface Eulerian1988-10-04 21:00:0052.6155 N, 3.7687 ENot applicable
592035Currents -subsurface Eulerian1988-10-04 21:00:0052.6155 N, 3.7687 ENot applicable
821271CTD or STD cast1988-11-02 03:35:0052.615 N, 3.759 ERRS Challenger CH39
248608Currents -subsurface Eulerian1988-11-02 12:40:0052.617 N, 3.7657 ENot applicable
592023Currents -subsurface Eulerian1988-11-02 12:40:0052.617 N, 3.7657 ENot applicable
821480CTD or STD cast1988-11-04 02:58:0052.60867 N, 3.7605 ERRS Challenger CH39
785680CTD or STD cast1988-12-02 08:39:0052.6195 N, 3.76783 ERRS Challenger CH41
785145CTD or STD cast1988-12-04 08:56:0052.6155 N, 3.7705 ERRS Challenger CH41
786357CTD or STD cast1989-01-04 21:01:0052.6145 N, 3.76783 ERRS Challenger CH43
786554CTD or STD cast1989-01-07 08:30:0052.61533 N, 3.7625 ERRS Challenger CH43
248621Currents -subsurface Eulerian1989-01-07 09:15:0052.6183 N, 3.7583 ENot applicable
591972Currents -subsurface Eulerian1989-01-07 09:15:0052.6183 N, 3.7583 ENot applicable
791034CTD or STD cast1989-01-29 05:21:0052.6165 N, 3.76833 ERRS Challenger CH45
1859395Water sample data1989-01-29 05:26:0052.61658 N, 3.76834 ERRS Challenger CH45
791046CTD or STD cast1989-01-29 05:44:0052.61933 N, 3.775 ERRS Challenger CH45
1859402Water sample data1989-01-29 05:46:0052.61925 N, 3.775 ERRS Challenger CH45
791255CTD or STD cast1989-01-31 09:29:0052.61533 N, 3.76417 ERRS Challenger CH45
1859611Water sample data1989-01-31 09:32:0052.61537 N, 3.76422 ERRS Challenger CH45
792246CTD or STD cast1989-02-28 01:52:0052.613 N, 3.765 ERRS Challenger CH47
792479CTD or STD cast1989-03-02 03:33:0052.61517 N, 3.75883 ERRS Challenger CH47
1857339Water sample data1989-03-02 03:36:0052.61519 N, 3.7589 ERRS Challenger CH47
793772CTD or STD cast1989-03-30 03:52:0052.61333 N, 3.7665 ERRS Challenger CH49
1858459Water sample data1989-03-30 03:57:0052.61336 N, 3.7665 ERRS Challenger CH49
793993CTD or STD cast1989-04-01 04:44:0052.614 N, 3.76267 ERRS Challenger CH49
1858668Water sample data1989-04-01 04:48:0052.61395 N, 3.76264 ERRS Challenger CH49
794714CTD or STD cast1989-04-28 09:49:0052.61967 N, 3.77083 ERRS Challenger CH51
592011Currents -subsurface Eulerian1989-04-28 10:50:0052.617 N, 3.7665 ENot applicable
794935CTD or STD cast1989-04-30 09:16:0052.62567 N, 3.77067 ERRS Challenger CH51
1860789Water sample data1989-04-30 09:22:0052.62575 N, 3.77065 ERRS Challenger CH51
796002CTD or STD cast1989-05-27 04:50:0052.61317 N, 3.76517 ERRS Challenger CH53
1863032Water sample data1989-05-27 04:53:0052.61322 N, 3.76522 ERRS Challenger CH53
796014CTD or STD cast1989-05-27 05:45:0052.61933 N, 3.77433 ERRS Challenger CH53
1863044Water sample data1989-05-27 05:48:0052.61935 N, 3.77433 ERRS Challenger CH53
796247CTD or STD cast1989-05-29 04:03:0052.61717 N, 3.7645 ERRS Challenger CH53
1863277Water sample data1989-05-29 04:08:0052.61719 N, 3.76454 ERRS Challenger CH53
248737Currents -subsurface Eulerian1989-05-29 05:10:0052.6157 N, 3.769 ENot applicable
591996Currents -subsurface Eulerian1989-05-29 05:10:0052.6157 N, 3.769 ENot applicable
797343CTD or STD cast1989-06-25 01:30:0052.61217 N, 3.77383 ERRS Challenger CH55
1656310Water sample data1989-06-25 01:33:0052.61211 N, 3.77385 ERRS Challenger CH55
1865548Water sample data1989-06-25 01:33:0052.61211 N, 3.77385 ERRS Challenger CH55
797380CTD or STD cast1989-06-25 08:30:0052.6155 N, 3.76967 ERRS Challenger CH55
1656358Water sample data1989-06-25 08:35:0052.61548 N, 3.76965 ERRS Challenger CH55
1865597Water sample data1989-06-25 08:35:0052.61548 N, 3.76965 ERRS Challenger CH55
591984Currents -subsurface Eulerian1989-06-25 09:10:0052.6147 N, 3.7658 ENot applicable
797552CTD or STD cast1989-06-26 23:38:0052.61733 N, 3.76333 ERRS Challenger CH55
1656543Water sample data1989-06-26 23:42:0052.61734 N, 3.7634 ERRS Challenger CH55
1865770Water sample data1989-06-26 23:42:0052.61734 N, 3.7634 ERRS Challenger CH55
798703CTD or STD cast1989-07-25 03:45:0052.61683 N, 3.76783 ERRS Challenger CH57
1245577Water sample data1989-07-25 03:47:0052.61676 N, 3.76788 ERRS Challenger CH57
1709035Water sample data1989-07-25 03:47:0052.61676 N, 3.76788 ERRS Challenger CH57
1864361Water sample data1989-07-25 03:47:0052.61676 N, 3.76788 ERRS Challenger CH57
248798Currents -subsurface Eulerian1989-07-27 05:10:0052.6167 N, 3.7658 ENot applicable
591960Currents -subsurface Eulerian1989-07-27 05:10:0052.6167 N, 3.7658 ENot applicable
798912CTD or STD cast1989-07-27 05:24:0052.61717 N, 3.77583 ERRS Challenger CH57
1709232Water sample data1989-07-27 05:26:0052.6171 N, 3.77581 ERRS Challenger CH57
1864570Water sample data1989-07-27 05:26:0052.6171 N, 3.77581 ERRS Challenger CH57
801245CTD or STD cast1989-08-24 02:44:0052.6155 N, 3.75367 ERRS Challenger CH59
1855935Water sample data1989-08-24 02:48:0052.61552 N, 3.75363 ERRS Challenger CH59
801282CTD or STD cast1989-08-24 08:42:0052.61667 N, 3.78933 ERRS Challenger CH59
1855972Water sample data1989-08-24 08:44:0052.61665 N, 3.7894 ERRS Challenger CH59
801429CTD or STD cast1989-08-25 23:20:0052.618 N, 3.7665 ERRS Challenger CH59
1856127Water sample data1989-08-25 23:23:0052.61803 N, 3.7665 ERRS Challenger CH59
248805Currents -subsurface Eulerian1989-08-25 23:45:0052.6147 N, 3.7682 ENot applicable
592059Currents -subsurface Eulerian1989-08-25 23:45:0052.6147 N, 3.7682 ENot applicable
799927CTD or STD cast1989-09-22 08:19:0052.62 N, 3.76617 ERRS Challenger CH61
1854692Water sample data1989-09-22 08:24:0052.62001 N, 3.76616 ERRS Challenger CH61
800101CTD or STD cast1989-09-23 21:23:0052.61817 N, 3.76933 ERRS Challenger CH61
1854864Water sample data1989-09-23 21:27:0052.61823 N, 3.76935 ERRS Challenger CH61
802562CTD or STD cast1990-05-21 11:50:0052.619 N, 3.76633 ERRS Challenger CH66A
802710CTD or STD cast1990-05-23 14:47:0052.61917 N, 3.77133 ERRS Challenger CH66A
827881CTD or STD cast1990-06-16 07:35:0052.63783 N, 3.77633 ERRS Challenger CH66B
804476CTD or STD cast1990-09-22 06:16:0052.61767 N, 3.77133 ERRS Challenger CH72A
804741CTD or STD cast1990-09-25 18:29:0052.62517 N, 3.76583 ERRS Challenger CH72A
829549CTD or STD cast1990-10-14 16:27:0052.6185 N, 3.76233 ERRS Challenger CH72C