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Metadata Report for BODC Series Reference Number 542419


Metadata Summary

Data Description

Data Category Hydrography time series at depth
Instrument Type
NameCategories
Vemco Minilog12 temperature recorder  water temperature sensor
Instrument Mounting subsurface mooring
Originating Country United Kingdom
Originator Prof Mark Inall
Originating Organization Dunstaffnage Marine Laboratory (now Scottish Association for Marine Science)
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) OMEX II-II
 

Data Identifiers

Originator's Identifier tp2422.1/9
BODC Series Reference 542419
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 1998-08-08 14:43
End Time (yyyy-mm-dd hh:mm) 1998-08-10 13:05
Nominal Cycle Interval 30.0 seconds
 

Spatial Co-ordinates

Latitude 41.91850 N ( 41° 55.1' N )
Longitude 9.32230 W ( 9° 19.3' W )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth 99.6 m
Maximum Sensor or Sampling Depth 99.6 m
Minimum Sensor or Sampling Height 67.9 m
Maximum Sensor or Sampling Height 67.9 m
Sea Floor Depth 167.5 m
Sea Floor Depth Source -
Sensor or Sampling Distribution Fixed common depth - All sensors are grouped effectively at the same depth which is effectively fixed for the duration of the series
Sensor or Sampling Depth Datum Sea floor reference - Depth measured as a height above sea floor but converted into a depth relative to the sea surface according to the same datum as used for sea floor depth (applicable to instrument depths not bathymetric depths)
Sea Floor Depth Datum Instantaneous - Depth measured below water line or instantaneous water body surface
 

Parameters

BODC CODERankUnitsTitle
AADYAA011DaysDate (time from 00:00 01/01/1760 to 00:00 UT on day)
AAFDZZ011DaysTime (time between 00:00 UT and timestamp)
TEMPPR011Degrees CelsiusTemperature 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

VEMCO Minilog12-TR temperature logger

Description

The VEMCO Minilog12-TR is a miniature data logger that records temperature at a user programmed time interval. It is housed in a waterproof cylinder and the temperature sensor is mounted on a protruding stainless steel probe.

Specifications

Memory 16k, 32k or 64k. Temperature readings stored in Electrically Erasable Programmable Read Only Memory (EEPROM). Logging duration is between 3 hours and 5 years depending on the logging interval.
Data Retention 20 years.
Temperature Range -5 to 40°C; 0.015°C resolution; ±0.1°C accuracy with factory calibration.
Maximum Depth 1000m
Communication Link Downloaded via PC interface box. Connects to computer via DB9 connector. No external connections are required. Full memory downloads in 6 minutes for 16k.
Battery Internal lithium battery with life of up to 5 years or up to 1200 full deployments.

For more information please see the Manufacturer's information sheet.

BODC Moored Meter Temperature Screening Procedures

BODC screen both the series header qualifying information and the parameter values in the data cycles themselves.

Header information is inspected for:

  • Irregularities such as unfeasible values.

  • Inconsistencies between related information, for example:

    • Depths of meter and sea bed
    • Times for mooring deployment and for start/end of data series
    • Length of record or number of data cycles, the cycle interval, the clock error and the period over which accrued
  • Originator's comments on meter/mooring performance, data quality and parameters measured and the parameters actually present in the data cycles.

Documents are written by BODC highlighting irregularities which cannot be resolved.

Data cycles are inspected via time series plot presentations of parameters. These presentations undergo intrinsic and extrinsic screening to detect infeasible values within the data cycles themselves and inconsistencies as seen when comparing characteristics of adjacent data sets displaced with respect to depth, position or time.

Values suspected of being of non oceanographic origin may be tagged with the BODC flag denoting suspect value.

The following types of irregularity, each relying on visual detection in the time series plot, are amongst those which may be flagged as suspect:

  • Spurious data at the start or end of the record.

  • Obvious spikes of non oceanographic origin.

If a large percentage of the data are affected by irregularities, deemed abnormal, then instead of flagging the individual suspect values, a caution may be documented.

Inconsistencies between the characteristics of the data set and those of its neighbours, as for example between the maximum and minimum values of the parameters (spikes excluded) are, where necessary, documented.

This intrinsic and extrinsic screening of the parameter values seeks to confirm the qualifying information and the source laboratory's comments on the series. In screening and collating information, every care is taken to ensure that errors of BODC making are not introduced.


Project Information

Ocean Margin EXchange (OMEX) II - II

Introduction

OMEX was a European multidisciplinary oceanographic research project that studied and quantified the exchange processes of carbon and associated elements between the continental shelf of western Europe and the open Atlantic Ocean. The project ran in two phases known as OMEX I (1993-1996) and OMEX II - II (1997-2000), with a bridging phase OMEX II - I (1996-1997). The project was supported by the European Union under the second and third phases of its MArine Science and Technology Programme (MAST) through contracts MAS2-CT93-0069 and MAS3-CT97-0076. It was led by Professor Roland Wollast from Université Libre de Bruxelles, Belgium and involved more than 100 scientists from 10 European countries.

Scientific Objectives

The aim of the Ocean Margin EXchange (OMEX) project was to gain a better understanding of the physical, chemical and biological processes occurring at the ocean margins in order to quantify fluxes of energy and matter (carbon, nutrients and other trace elements) across this boundary. The research culminated in the development of quantitative budgets for the areas studied using an approach based on both field measurements and modeling.

OMEX II - II (1997-2000)

The second phase of OMEX concentrated exclusively on the Iberian Margin, although RV Belgica did make some measurements on La Chapelle Bank whilst on passage to Zeebrugge. This is a narrow-shelf environment, which contrasts sharply with the broad shelf adjacent to the Goban Spur. This phase of the project was also strongly multidisciplinary in approach, covering physics, chemistry, biology and geology.

There were a total of 33 OMEX II - II research cruises, plus 23 CPR tows, most of which were instrumented. Some of these cruises took place before the official project start date of June 1997.

Data Availability

Field data collected during OMEX II - II have been published by BODC as a CD-ROM product, entitled:

  • OMEX II Project Data Set (three discs)

Further descriptions of this product and order forms may be found on the BODC web site.

The data are also held in BODC's databases and subsets may be obtained by request from BODC.


Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 1998-08-08
End Date (yyyy-mm-dd) 1998-08-10
Organization Undertaking ActivityUniversity of the Highlands and Islands Environmental Research Institute
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierCD114/STA1
Platform Categorysubsurface mooring

OMEX II Mooring OMEX2/CD114/STA1

Position 41° 55.11' N, 9° 19.34' W
Water depth 167.5 m
Deployed 8 Aug 1998
from Charles Darwin (CD114A)
Recovered 10 Aug 1998
from Charles Darwin (CD114A)

Single point mooring with glass spheres for tension

Instruments deployed on the rig

Depth below
Surface
Instrument
10 m S4 current meter (#04670920)
14.6 m Vemco temperature minilogger (#2034)
19.6 m Vemco temperature minilogger (#2036)
24.6 m Vemco temperature minilogger (#3129)
29.6 m Vemco temperature minilogger (#3130)
34.6 m Vemco temperature minilogger (#2423)
39.6 m Vemco temperature minilogger (#2424)
59.6 m Vemco temperature minilogger (#2427)
79.6 m Vemco temperature minilogger (#2426)
99.6 m Vemco temperature minilogger (#2422)

Related Data Activity activities are detailed in Appendix 1

Cruise

Cruise Name CD114A
Departure Date 1998-07-29
Arrival Date 1998-08-11
Principal Scientist(s)Ian Joint (Plymouth Marine Laboratory)
Ship RRS Charles Darwin

Complete Cruise Metadata Report is available here


Fixed Station Information


No Fixed Station Information held for the Series


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: CD114/STA1

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
542420Hydrography time series at depth1998-08-08 14:43:5941.9185 N, 9.3223 WRRS Charles Darwin CD114A
542432Hydrography time series at depth1998-08-08 14:43:5941.9185 N, 9.3223 WRRS Charles Darwin CD114A
542444Hydrography time series at depth1998-08-08 14:43:5941.9185 N, 9.3223 WRRS Charles Darwin CD114A
542456Hydrography time series at depth1998-08-08 14:43:5941.9185 N, 9.3223 WRRS Charles Darwin CD114A
542468Hydrography time series at depth1998-08-08 14:43:5941.9185 N, 9.3223 WRRS Charles Darwin CD114A
542481Hydrography time series at depth1998-08-08 14:43:5941.9185 N, 9.3223 WRRS Charles Darwin CD114A
542493Hydrography time series at depth1998-08-08 14:43:5941.9185 N, 9.3223 WRRS Charles Darwin CD114A
542500Hydrography time series at depth1998-08-08 14:43:5941.9185 N, 9.3223 WRRS Charles Darwin CD114A
542524Currents -subsurface Eulerian1998-08-08 14:44:0041.9185 N, 9.3223 WRRS Charles Darwin CD114A