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Metadata Report for BODC Series Reference Number 1246556


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_12:2505
BODC Series Reference 1246556
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 1989-08-05 05:19
End Time (yyyy-mm-dd hh:mm) -
Nominal Cycle Interval -
 

Spatial Co-ordinates

Latitude 54.33279 N ( 54° 20.0' N )
Longitude 0.41858 E ( 0° 25.1' E )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth 0.5 m
Maximum Sensor or Sampling Depth 54.0 m
Minimum Sensor or Sampling Height 7.6 m
Maximum Sensor or Sampling Height 61.1 m
Sea Floor Depth 61.6 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) 1989-08-05
End Date (yyyy-mm-dd) 1989-08-05
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_2505
Platform Categorylowered unmanned submersible

BODC Sample Metadata Report for CH57_CTD_2505

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
308047   10.00       58.40   58.90   54.00 Niskin bottle No problem reported    
308050   10.00       23.80   23.90   19.50 Niskin bottle No problem reported    
308060   10.00        3.20    3.70     .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 C and CTD Site DM
CategoryOffshore location
Latitude54° 19.80' N
Longitude0° 24.00' E
Water depth below MSL60.0 m

North Sea Project Survey Mooring Site C and CTD Site DM

Site C 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 characterised by moderate tidal currents, up to a maximum of 1.1 m/s. In summer months, the site was situated in a frontal region between stratified water to the north and vertically well mixed water to the south.

The rigs deployed here lie within a box bounded by co-ordinates 54.32N 0.393E at the southwest corner and 54.34N 0.422E at the northeast corner. Magnetic variation at this site was 4.9° west.

Site C deployment history is summarised below:

Rig ID Meter type Meter height Start date Data return (days) Comment
C33CC

ADCP

CM

0.8m

0.8m

13/08/88

13/08/88

0.0

29.5

Data corrupt

N/A

C33CT THCH   13/08/88 30 Good data
C35CT THCH   12/09/88 24 Good data
C36CC

ADCP

CM

0.8m

0.8m

18/09/88

18/09/88

0.0

20.8

Data corrupt

N/A

C37CC

ADCP

CM

0.8m

0.8m

09/10/88

09/10/88

30.4

30.7

 
C39CC

ADCP

CM

0.8m

0.8m

10/11/88

10/11/88

27.1

27.1

 
C41CC

ADCP

CM

0.8m

0.8m

07/12/88

07/12/88

0.0

24.9

Data corrupt
C43CC ADCP 0.8m 01/01/89 37.1  
C45CC ADCP 0.8m 07/02/89 27.7  
C47CC ADCP 0.8m 09/03/89 29.7  
C49CC

ADCP

CM

0.8m

0.8m

08/04/89

08/04/89

28.2

28.2

 
C49CT THCH   08/04/89 28 Data for 5.0m thermistor bead only
C51CC

ADCP

CM

0.8m

0.8m

06/05/89

06/05/89

22.6

28.5

 
C51CT THCH   06/05/89 29 Data for 5.0m thermistor bead only
C53CC

ADCP

CM

0.8m

0.8m

04/06/89

04/06/89

4.0

28.8

 
C53CT THCH   04/06/89 29 All data except, 5.0m thermistor bead data, extremely 'noisy'
C55CC

ADCP

CM

0.8m

0.8m

03/07/89

03/07/89

29.0

29.0

Rig trawled 01/08/89

Rig trawled 01/08/89

C55CT THCH   03/07/89 33 Good data
C57CC

ADCP

CM

0.8m

0.8m

05/08/89

05/08/89

26.9

26.9

 
C57CT THCH   05/08/89 27 Good data in all but 2 thermistor bead depths
C59CC

ADCP

CM

0.8m

0.8m

01/09/89

01/09/89

29.4

29.4

 
C59CT THCH   01/09/89 29 Good data in all but 3 thermistor bead depths

ADCP = Acoustic Doppler Current Profiler
CM = Current Meter (Aanderaa or S4)
THCH = Thermistor Chain

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_2505

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
1710012Water sample data1989-08-05 05:19:0054.33279 N, 0.41858 ERRS Challenger CH57
1865388Water sample data1989-08-05 05:19:0054.33279 N, 0.41858 ERRS Challenger CH57

Appendix 2: NSP Survey C and CTD Site DM

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
580058Hydrography time series at depth1988-08-13 19:59:5954.3317 N, 0.4035 ENot applicable
604959Hydrography time series at depth1988-08-13 20:30:0054.3317 N, 0.4 ENot applicable
769888CTD or STD cast1988-08-13 20:32:0054.32933 N, 0.40117 ERRS Challenger CH33
770017CTD or STD cast1988-08-15 01:44:0054.31817 N, 0.47 ERRS Challenger CH33
811184CTD or STD cast1988-08-27 22:16:0054.336 N, 0.34383 ERRS Challenger CH34
783986CTD or STD cast1988-09-12 08:38:0054.3335 N, 0.402 ERRS Challenger CH35
605011Hydrography time series at depth1988-09-12 09:40:3854.3348 N, 0.3988 ENot applicable
580126Hydrography time series at depth1988-09-18 19:20:0754.3437 N, 0.3948 ENot applicable
812010CTD or STD cast1988-09-18 20:03:0054.33167 N, 0.39467 ERRS Challenger CH36
784603CTD or STD cast1988-10-09 12:52:0054.3295 N, 0.43017 ERRS Challenger CH37
580114Hydrography time series at depth1988-10-09 14:50:0054.3332 N, 0.4037 ENot applicable
604100Currents -subsurface Eulerian1988-10-09 14:57:1254.3332 N, 0.4037 ENot applicable
580102Hydrography time series at depth1988-11-10 08:00:0154.334 N, 0.4098 ENot applicable
604093Currents -subsurface Eulerian1988-11-10 08:07:0654.334 N, 0.4098 ENot applicable
822305CTD or STD cast1988-11-11 18:44:0054.33167 N, 0.3995 ERRS Challenger CH39
785225CTD or STD cast1988-12-07 08:58:0054.3205 N, 0.397 ERRS Challenger CH41
580071Hydrography time series at depth1988-12-07 12:40:0054.3327 N, 0.417 ENot applicable
785993CTD or STD cast1989-01-01 09:00:0054.332 N, 0.40133 ERRS Challenger CH43
604020Currents -subsurface Eulerian1989-01-01 11:17:1354.3318 N, 0.4217 ENot applicable
791949CTD or STD cast1989-02-07 12:44:0054.33317 N, 0.39383 ERRS Challenger CH45
604019Currents -subsurface Eulerian1989-02-07 14:16:4954.3327 N, 0.421 ENot applicable
793089CTD or STD cast1989-03-07 06:32:0054.33267 N, 0.39767 ERRS Challenger CH47
1857825Water sample data1989-03-07 06:35:0054.33264 N, 0.39771 ERRS Challenger CH47
793680CTD or STD cast1989-03-07 06:52:0054.33367 N, 0.40333 ERRS Challenger CH47
604068Currents -subsurface Eulerian1989-03-09 15:16:5754.3302 N, 0.3975 ENot applicable
793378CTD or STD cast1989-03-09 15:24:0054.32767 N, 0.39667 ERRS Challenger CH47
1858110Water sample data1989-03-09 15:27:0054.32767 N, 0.39662 ERRS Challenger CH47
604947Hydrography time series at depth1989-04-08 09:29:5754.3377 N, 0.4027 ENot applicable
603993Currents -subsurface Eulerian1989-04-08 09:37:0654.33 N, 0.3993 ENot applicable
591751Currents -subsurface Eulerian1989-04-08 09:40:0054.33 N, 0.3993 ENot applicable
794505CTD or STD cast1989-04-08 09:52:0054.33383 N, 0.39733 ERRS Challenger CH49
1859186Water sample data1989-04-08 09:56:0054.33377 N, 0.3974 ERRS Challenger CH49
795613CTD or STD cast1989-05-06 15:13:0054.33033 N, 0.40067 ERRS Challenger CH51
1861455Water sample data1989-05-06 15:24:0054.33025 N, 0.40067 ERRS Challenger CH51
604996Hydrography time series at depth1989-05-06 16:26:1554.3285 N, 0.4043 ENot applicable
591787Currents -subsurface Eulerian1989-05-06 16:50:0054.331 N, 0.4035 ENot applicable
604081Currents -subsurface Eulerian1989-05-06 16:57:0854.331 N, 0.4035 ENot applicable
796991CTD or STD cast1989-06-04 06:44:0054.33033 N, 0.40117 ERRS Challenger CH53
1864035Water sample data1989-06-04 06:49:0054.33041 N, 0.40124 ERRS Challenger CH53
604984Hydrography time series at depth1989-06-04 07:58:0854.3385 N, 0.3965 ENot applicable
604044Currents -subsurface Eulerian1989-06-04 08:07:0854.3403 N, 0.3938 ENot applicable
580083Hydrography time series at depth1989-06-04 08:10:0254.3403 N, 0.3938 ENot applicable
798266CTD or STD cast1989-07-03 03:22:0054.3315 N, 0.4015 ERRS Challenger CH55
1657208Water sample data1989-07-03 03:28:0054.33154 N, 0.40146 ERRS Challenger CH55
1866484Water sample data1989-07-03 03:28:0054.33154 N, 0.40146 ERRS Challenger CH55
604972Hydrography time series at depth1989-07-03 05:41:3054.3372 N, 0.3962 ENot applicable
591775Currents -subsurface Eulerian1989-07-03 05:47:0054.3398 N, 0.395 ENot applicable
604032Currents -subsurface Eulerian1989-07-03 05:47:1154.3398 N, 0.395 ENot applicable
799743CTD or STD cast1989-08-05 05:16:0054.33283 N, 0.4185 ERRS Challenger CH57
1710012Water sample data1989-08-05 05:19:0054.33279 N, 0.41858 ERRS Challenger CH57
1865388Water sample data1989-08-05 05:19:0054.33279 N, 0.41858 ERRS Challenger CH57
591763Currents -subsurface Eulerian1989-08-05 06:50:0054.34 N, 0.396 ENot applicable
604960Hydrography time series at depth1989-08-05 06:50:3954.3367 N, 0.3983 ENot applicable
604007Currents -subsurface Eulerian1989-08-05 06:57:1054.34 N, 0.396 ENot applicable
802156CTD or STD cast1989-09-01 03:13:0054.33067 N, 0.40533 ERRS Challenger CH59
1856846Water sample data1989-09-01 03:19:0054.3306 N, 0.4053 ERRS Challenger CH59
605023Hydrography time series at depth1989-09-01 06:48:1054.337 N, 0.4003 ENot applicable
591799Currents -subsurface Eulerian1989-09-01 07:05:0054.3405 N, 0.399 ENot applicable
604124Currents -subsurface Eulerian1989-09-01 07:07:1154.3405 N, 0.399 ENot applicable
800819CTD or STD cast1989-09-30 17:01:0054.33517 N, 0.40267 ERRS Challenger CH61
1855578Water sample data1989-09-30 17:05:0054.33516 N, 0.40264 ERRS Challenger CH61
805302CTD or STD cast1990-10-01 09:23:0054.333 N, 0.397 ERRS Challenger CH72A