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Metadata Report for BODC Series Reference Number 1903619


Metadata Summary

Data Description

Data Category Surface temp/sal
Instrument Type
NameCategories
Sea-Bird SBE 45 MicroTSG thermosalinograph  thermosalinographs; water temperature sensor; salinity sensor
Turner Designs 10AU fluorometer  fluorometers
Litre Meter flow meter  flow meters
Kongsberg Seatex Seapath 200 Global Positioning System receiver and gyrocompass  platform attitude sensors; Differential Global Positioning System receivers
Sea-Bird SBE 48 Hull Temperature Sensor  water temperature sensor
Instrument Mounting research vessel
Originating Country United Kingdom
Originator Unknown
Originating Organization British Oceanographic Data Centre, Liverpool
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) BIOFLAME
 

Data Identifiers

Originator's Identifier JR20080221-PRODQXF_SURF
BODC Series Reference 1903619
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2008-02-21 20:09
End Time (yyyy-mm-dd hh:mm) 2008-04-11 11:10
Nominal Cycle Interval 60.0 seconds
 

Spatial Co-ordinates

Start Latitude 74.50550 S ( 74° 30.3' S )
End Latitude 51.65717 S ( 51° 39.4' S )
Start Longitude 120.26200 W ( 120° 15.7' W )
End Longitude 57.10617 W ( 57° 6.4' W )
Positional Uncertainty 0.0 to 0.01 n.miles
Minimum Sensor or Sampling Depth 7.0 m
Maximum Sensor or Sampling Depth 7.0 m
Minimum Sensor or Sampling Height -
Maximum Sensor or Sampling Height -
Sea Floor Depth -
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 Approximate - Depth is only approximate
Sea Floor Depth Datum -
 

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)
ALATGP011DegreesLatitude north relative to WGS84 by unspecified GPS system
ALONGP011DegreesLongitude east relative to WGS84 by unspecified GPS system
CNDCSG011Siemens per metreElectrical conductivity of the water body by thermosalinograph
CPHLUMTF1Milligrams per cubic metreConcentration of chlorophyll-a {chl-a CAS 479-61-8} per unit volume of the water body [particulate >unknown phase] by through-flow fluorometer plumbed into non-toxic supply and manufacturer's calibration applied
INFLTF011Litres per minuteFlow rate through instrument
PSALSU011DimensionlessPractical salinity of the water body by thermosalinograph and computation using UNESCO 1983 algorithm and no calibration against independent measurements
SVELSG011Metres per secondSound velocity in the water body by thermosalinograph and computation from temperature and salinity by unspecified algorithm
TEMPHU011Degrees CelsiusTemperature of the water body by thermosalinograph hull sensor and no verification against independent measurements
TMESSG011Degrees CelsiusTemperature of electrical conductivity measurement by thermosalinograph

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

Turner Designs 10AU Field Fluorometer

The Turner Designs 10AU is designed for continuous-flow monitoring or discrete sample analyses of fluorescent species. A variety of optical kits with appropriate filters and lamps are available for a wide range of applications. Individual filters and lamps are also available for customised applications.

Standard optical kits include those for chlorophyll-a (extracted and/or in vivo), phycocyanin, phycoerythrin, CDOM, ammonium, rhodamine and fluorescein dye tracing, crude oil, refined oil, histamine and optical brighteners.

The instrument's light source is a 4 watt lamp and the detector is a photomultiplier tube with a standard detection range of 300-650 nm. A red-sensitive version with a detetion range of 185-970 nm is also available.

Specifications

Operating temperature 0 to 55°C
Detector PhotoMultiplier Tube

300 to 650 nm (standard)

185 to 870 nm (Red)

Detection Limits:
Extracted Chlorophyll-a
Rhodamine WT Dye
Fluorescein Dye

0.025 µg L-1
0.01 ppb (in potable water)
0.01 ppb (in potable water)
Linear range:
Extracted Chlorophyll-a
Rhodamine WT Dye
Fluorescein Dye

0 to 250µg L-1
0 to 250 ppb
0 to 250 ppb

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

Kongsberg Seatex Seapath 200 GPS and Gyrocompass

The Seapath 200 is a highly accurate, real-time heading, attitude and position information system that integrates the best signal characteristics of Inertial Measurement Units (IMU) and Global Positioning System (GPS), using a differential GPS method to acquire this data.

The high-rate motion data is obtained from the Seatex MRU5 inertial sensor and two fixed baseline GPS carrier-phase receivers. The raw data is integrated in a Kalman filter in the Seapath Processing Unit. The IMU contains an accurate linear accelerometer and Bosch Coriolis force angular rate gyros (CFG).

This system is equipped to utilise up to six different DGPS reference stations, it checks for consistency within measurements from the different sensors to ensure reliability and rejects noisy data or reports its inaccuracy. The data is available through various output protocols, RS-232, RS-422 and Ethernet.

This instrument is no longer in production; the main characteristics are presented below, and the specification sheet can be accessed here Kongsberg Seatex Seapath 200 .

Specifications

Scale factor error in pitch, roll and heading 0.2% RMS
Heave motion periods 1 to 25 s
Accuracy
Heading

0.05° RMS (4 m baseline)

0.075° RMS (2.5 m baseline)

Roll and Pitch 0.03° EMS (± 5° amplitude)
Heave 5 cm or 5%, whichever is highest
Position

0.7 RMS or 1.5 m (95% CEP) with DGPS

0.15 m EMS or 0.4 m (95% CEP) with Searef 100 corrections

Velocity 0.03 m s-1 RMS or 0.07 m s-1 (95% CEP) with DGPS

BIOFLAME Cruise RRS James Clark Ross JR20080221 (JR178, JR179) Underway Surface Hydrography Instrumentation Document

The sea surface hydrographical suite of sensors was fed by the pumped-seawater, non-toxic supply. The seawater intake was located approximately 7 m below the sea surface. The SBE 38 sea surface temperature sensor was located towards the hull near the seawater intake. All other sensors were located in the clean seawater laboratory on the main deck, directly above the intake pipe.

Litre Meter flow meter

A flow meter used to monitor water flow rates for pumped systems such as ships' continuous seawater supplies.

Sea-Bird SBE 48 Hull Temperature Sensor

The SBE 48 is a high-accuracy temperature recorder with non-volatile memory, designed for shipboard determination of sea surface temperature. Mounted with magnets just below the water line, the SBE 48's temperature sensor is in contact with the inside of the ship's hull. The SBE 48's internal battery runs the real-time clock and can be used to power the instrument for very short deployments; external power is recommended for typical deployments.

Data are recorded in memory and can also be output in real-time in engineering units. Memory capacity exceeds 4.7 million samples of temperature and time; this yields approximately 54 days of data when sampling every 1 sec.

Specifications

Manufacturer Model Function
SeaBird Electronics SBE45 CTD Surface hydrography
Turner Designs 10-AU Fluorometer Chlorophyll fluorescence
Litre Meter Flow meter Flow rate
SeaBird ElectronicsSBE48 Hull temperature sensor
Range -5 to +35 °C
Initial accuracy ± 0.002°C
Resolution 0.0001 °C
Typical stability (per month) 0.0002 °C
Sampling Speed Approximately 1 Hz (1 sample/sec), or user-programmable 3-sec to 9-hour intervals
Memory 4.7 million samples (temperature and time)

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

SeaBird MicroTSG Thermosalinograph SBE 45

The SBE45 MicroTSG is an externally powered instrument designed for shipboard measurement of temperature and conductivity of pumped near-surface water samples. The instrument can also compute salinity and sound velocity internally.

The MicroTSG comprises a platinum-electrode glass conductivity cell and a stable, pressure-protected thermistor temperature sensor. It also contains an RS-232 port for appending the output of a remote temperature sensor, allowing for direct measurement of sea surface temperature.

The instrument can operate in Polled, Autonomous and Serial Line Sync sampling modes:

  • Polled sampling: the instrument takes one sample on command
  • Autonomous sampling: the instrument samples at preprogrammed intervals and does not enter quiescence (sleep) state between samples
  • Serial Line Sync: a pulse on the serial line causes the instrument to wake up, sample and re-enter quiescent state automatically

Specifications

  Conductivity Temperature Salinity
Range 0 to 7 Sm-1 -5 to 35°C  
Initial accuracy 0.0003 Sm-1 0.002°C 0.005 (typical)
Resolution 0.00001 Sm-1 0.0001°C 0.0002 (typical)
Typical stability (per month) 0.0003 Sm-1 0.0002°C 0.003 (typical)

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

BIOFLAME Cruise RRS James Clark Ross JR20080221 (JR178, JR179) Underway Surface Hydrography Processing Procedures Document

Originator's Data Processing

The originator did not process the data during the cruise, the only procedures implemented throughout the cruise consisted of data retrieval from the previous 24h and logging those into sub directories on the ship's intranet system.

The sea surface hydrography measurements were performed by a number of instruments connected to the ship's flow through system and a temperature sensor located near the flow through intake, at the hull, at 7 m depth.

The originator sent one file containing the sea surface data: Surface temperature by the thermosalinograph and hull sensor, chlorophyll, salinity, conductivity, sound velocity and pump flow rate.

The processing procedures carried out by the originator include:

  • check for duplicate dates and times
  • standardising time
  • check for gaps in data
  • check data against defined thresholds
  • flagging
  • unit conversion

Files delivered to BODC

Filename Content description Format Interval Start date/time (UTC) End date/time (UTC) Comments
jr179_ocl_exactsec Meteorology and Surface hydrography txt 5s 17/02/2008 20:30:28 11/04/2008 13:14:45 Data processed by originator

BODC Data Processing

All sea surface hydrography parameters, were transferred to internal QXF format and matched against BODC codes, as presented in the table below. There was no need to apply unit conversions as the originator's units were similar to the units described on the BODC parameter dictionary.

BODC processing procedures included loading of data and reduction through averaging, visual screening and flagging of anomalous values.

The originator's variables were mapped to appropriate BODC parameter codes as follows:

jr179_ocl_exactsec

Originator's variable Originator's units BODC code BODC units Comments
ThermoSalTemp degrees C TMESSG01 degrees C Remote sensor
SSTemp degrees C TEMPHU01 degrees C Hull sensor
Chloro µg l-1 CPHLUMTF mg m-3 Equivalent units
Salinity - PSALSU01 dimensionless  
Cond s m-1 CNDCSG01 s m-1  
Velocity m s-1 SVELSG01 m s-1  
flow_rate l min-1 INFLTF01 l min-1  

Surface hydrography data were screened and N flags applied to absent data values. M flags were applied to TMESSG01, CNDCSG01 and PSALSU01 where anomalous data were identified.


Project Information

BIOFLAME- Biodiversity, Function, Limits and Adaptation from Molecules to Ecosystems

Introduction

This project is part of the BAS GSAC five year research programme. It was funded by NERC and covered a period from 2005 to 2009.

BIOFLAME will study the DNA "fingerprints " of biological evolution to trace the way species adapt to environmental extremes. The methods include high-volume, high-throughput molecular biological approaches, especially DNA sequencing, DNA libraries and micro-array technology on representative samples from the terrestrial and marine ecosystems on and around Antarctica.

BIOFLAME has two components: BIOPEARL (Biodiversity dynamics: Phylogeography, Evolution and Radiation of life) and BIOREACH (Biological Responses to Extreme Antarctic Conditions and Hyper-Extremes) and links with projects and programmes like ACES, CACHE, DISCOVERY2010 and GEACEP.

Scientific Objectives

The main objectives are:

  • Understand how the genomes of different species influence their responses to environmental variation and change at the level of individuals, populations, communities and ecosystems
  • Find out how the climate change influences biodiversity and affects important ways the ecosystem functions within the Antarctic and globally
  • Determine the role of Antarctica and extreme environments in evolutionary change and the development of global biodiversity

Data Availability

Data sets collected during this project are available to the academic community.

Acronyms used in this text:

BAS- British Antarctic Survey

GSAC- Global Science in an Antarctic Context

NERC- Natural Environment Research Council

ACES- Antarctic Climate and the Earth System

CACHE- Climate and Chemistry: forcings, feedbacks and phasings in the Earth System

DISCOVERY2010- Integrating Southern Ocean Ecosystems into the Earth System

GEACEP- Greenhouse to ice-house: Evolution of the Antarctic Cryosphere and Paleoenvironment


Data Activity or Cruise Information

Cruise

Cruise Name JR20080221 (JR179)
Departure Date 2008-02-21
Arrival Date 2008-04-11
Principal Scientist(s)Peter Enderlein (British Antarctic Survey), Robert D Larter (British Antarctic Survey)
Ship RRS James Clark Ross

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
B nominal value
Q value below limit of quantification