Metadata Report for BODC Series Reference Number 664324


Metadata Summary

Data Description

Data Category Hydrography time series at depth
Instrument Type
NameCategories
SeaTech transmissometer  transmissometers
Aanderaa RCM 7/8 Recording Current Meter  current meters
Instrument Mounting fixed benthic node
Originating Country United Kingdom
Originator Mr John Howarth
Originating Organization Proudman Oceanographic Laboratory (now National Oceanography Centre, Liverpool)
Processing Status banked
Project(s) Coastal Observatory
 

Data Identifiers

Originator's Identifier as11820.898
BODC Series Reference 664324
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2004-06-09 12:45
End Time (yyyy-mm-dd hh:mm) 2004-07-20 11:25
Nominal Cycle Interval 600.0 seconds
 

Spatial Co-ordinates

Latitude 53.53467 N ( 53° 32.1' N )
Longitude 3.35933 W ( 3° 21.6' W )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor Depth 26.1 m
Maximum Sensor Depth 26.1 m
Minimum Sensor Height 0.5 m
Maximum Sensor Height 0.5 m
Sea Floor Depth 26.6 m
Sensor Distribution Fixed common depth - All sensors are grouped effectively at the same depth which is effectively fixed for the duration of the series
Sensor Depth Datum Approximate - Depth is only approximate
Sea Floor Depth Datum Approximate - Depth is only approximate
 

Parameters

BODC CODE Rank Units Short Title Title
AADYAA01 1 Days Date(Loch_Day) Date (time from 00:00 01/01/1760 to 00:00 UT on day)
AAFDZZ01 1 Days Time(Day_Fract) Time (time between 00:00 UT and timestamp)
ACYCAA01 1 Dimensionless Record_No Sequence number
ATTNDR01 1 per metre Attn_Red_25cm Attenuation (red light wavelength) per unit length of the water body by 25cm path length red light transmissometer
PREXPS01 1 Decibars MeasPress_SL Pressure (measured variable) exerted by the water body by fixed in-situ pressure sensor and corrected to read zero at sea level
TEMPPR01 1 Degrees Celsius Temp Temperature 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

Originator's quality control comments for PD22_04 COBS moorings

Data supplied to BODC were accompanied by data quality notes from the Originator that detailed observations made when the data were processed and subsequent processing decisions. A summary of these notes is available below for each of the instruments deployed on rigs from this cruise.

Rig#897

Instrument Serial number Instrument depth Comments
Sea-Bird MicroCAT 02010 5 m CTD comparison checks found a large temperature offset at mooring deployment (distance of over one kilometre between CTD and mooring), however there was a good match between CTD temperature and the temperature data recorded by this instrument at mooring recovery (distance of approximately 500 m between CTD and mooring). These checks also found an offset in the conductivity channel, with a mean value of -0.0084 S m-1. No adjustments were made to either channel because of the large seperation distance between the CTD and the mooring at deployment. The Originator recommends that these data are used with caution due to the large distance between the CTD and the mooring at deployment.
Aanderaa RCM 09631 10 m The conductivity data were recorded in low resolution. There was a good match between the data recorded by this instrument and data from the CTD, however the Data Originator recommends that these data are used with caution, as the nearest CTD cast at deployment was conducted approximately one kilometre from the mooring.

Rig#898


Instrument Serial number Instrument depth Data quality comments
Aanderaa RCM fitted with transmissometer Sea-Tech 637 11820 Located on seabed The Originator reports that the quality of the temperature data was good. All conductivity values were recorded as 0.007 S m-1, so the entire channel has been converted to absent data indicators values. Pressure was not originally recorded, and has been added using the pressure data from an alongside ADCP.
Aanderaa BPR 1357 Located on seabed Temperature values were found to be unrealistic until 2004-06-09 14:50:29 UTC, and were converted to absent data indicators values by the Data Originator. When these data were compared with data from other instruments, a mean offset of -0.2740°C was found. An offset correction of +0.2740°C has been applied to the temperature channel.
Sea-Bird MicroCAT 02081 Located on seabed Quality checks revealed consistent offsets in temperature and conductivity which had a minimum values of -0.0350°C in temperature and -0.0068 S m-1 in conductivity. Offset corrections of +0.0350°C and +0.0068 S m-1 have been applied to these channels. The pressure data recorded by this sensor was unrealistic and have been replaced using data from an alongside ADCP.
Teledyne RDI 600 kHz ADCP 2390 Located on seabed To correct for the magnetic declination (difference between magnetic north and true north) latitude values were changed by -4.1643°. All latitude values were modified by 5.8764° to correct for the compass error.

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

Aanderaa Recording Current Meter Model 7/8

Manufacturer's specifications: recording unit height 49.5cm (RCM8 52.0cm), diameter 12.8cm, vane size 48.5x50.0cm. Meter is designed for depths down to 2000m (RCM8 6000m). It incorporates a spindle which is shackled to the mooring line. The meter is attached to the spindle through a gimbal mounting which permits a maximum 27° deviation of the spindle from the vertical, the meter still remaining horizontal.

Meter comprises :

  1. Paddle wheel rotor magnetically coupled to an electronic counter

  2. Vane, which aligns instrument with current flow, has a balance weight ensuring static balance and tail fins to ensure dynamic balance in flows up to 250cm/s.

  3. Magnetic compass (needle is clamped to potentiometer ring) - direction recorded with 0.35° resolution, 5° accuracy for speeds 5 to 100cm/s, 7.5° accuracy for remaining speeds within 2.5 to 200cm/s range.

  4. Quartz clock, accuracy better than 2 sec/day within temperature range 0 to 20°C.

  5. Thermistor (temperature sensor), standard range -2.46 to 21.48°C (max on high range 36.04°C), accuracy 0.05°C, resolution 0.1 per cent of range, 63 per cent response time 12sec.

  6. Inductive cell conductivity sensor (optional), range 0 to 70mmho/cm standard resolution 0.1 per cent of range.

  7. Silicon piezoresistive bridge, standard range 0 to 3000 psi (RCM8 to 9000 psi), resolution 0.1% of range.

  8. Self balancing potentiometer which converts the output from each sensor into a 10 bit binary number for storage on magnetic tape.

  9. Associated electronics.

A built-in clock triggers the instrument at preset intervals and up to six channels are sampled in sequence. Channel 1 is a fixed reference reading for control purposes and data identification. Channels 2, 3 and 4 represent measurement of temperature, conductivity and pressure. Channels 5 and 6 represent the VECTOR AVERAGED current speed and direction since the previous triggering of the instrument. The number of rotor revolutions and the direction is sampled every 12 seconds and broken into North and East components. Successive components are added and recorded as speed and direction. For recording intervals longer than 10 minutes, speed and direction are sampled 1/50th of recording interval.

It has become common practice in some laboratories to deploy these meters as temperature and conductivity loggers without current measuring capabilities.

The following link will provide the manufacturer specifications:

Manufacturer specifications

SeaTech Transmissometer

Introduction

The transmissometer is designed to accurately measure the the amount of light transmitted by a modulated Light Emitting Diode (LED) through a fixed-length in-situ water column to a synchronous detector.

Specifications

Notes

The instrument can be interfaced to Aanderaa RCM7 current meters. This is achieved by fitting the transmissometer in a slot cut into a customized RCM4-type vane.

A red LED (660 nm) is used for general applications looking at water column sediment load. However, green or blue LEDs can be fitted for specilised optics applications. The light source used is identified by the BODC parameter code.

Further details can be found in the manufacturer's Manual .

Aanderaa Current Meter Data Processing

Data Originator's Processing

The following procedures are carried out before the data were supplied to BODC.

After the mooring was recovered, the data were downloaded from the instrument logger, and factory calibrations were applied to the temperature and conductivity channels. Where available, laboratory calibrations of the current direction channels were used; factory formulae were used in their absence. Where no form factor was known for the conductivity sensor, a value of 2.8 was used.

Before the data were supplied to BODC, basic quality control was performed by the Data Originator. The first stage of quality checks involved comparing the data from each instrument with CTD measurements recorded during the deployment and recovery of the mooring. Following the comparison against CTD data secondary checks were performed by comparing the data from each instrument against the data from other sensors attached to that mooring. The Originator has provided BODC with a document containing a full description of their quality control methodology . Depending on the result of the quality checks for each series, one of the following actions was performed by the Originator:

A full description of the results of these quality checks can be found in the relevant Originator's data processing comments document.

Processing of Coastal Observatory Aanderaa RCM with Sea-Tech Transmissometer data by BODC

The data were provided to BODC in ASCII format, and the series were reformatted into BODC standard internal format using a transfer function. During this process, salinity was derived from the conductivity, temperature and pressure data, in accordance with the methods outlined in Foffonoff and Millard (1982).

During the transfer process transmittance was converted from raw counts into attenuance. More information on this process has been provided in the Sea-Tech Transmissometer BODC data processing document.

The table below shows how the variables within the processed data files were mapped to appropriate BODC parameter codes.

Originator's variable Units Description BODC parameter code Units Comments
Date/Time yyyy mm dd hh mm ss - - - This variable was not transferred. BODC re-calculate date and time during the transfer process
Pressure Bar or dbar Pressure (measured variable) exerted by the water body plus atmosphere by semi-fixed in situ pressure sensor PREXPS01 dbar The Originator supplied data in both bars and decibars, depending on the the instrument. In cases where the pressure unit was bar, these data were converted into decibars by multiplying the data by 10.
Temperature Deg(C) Temperature of the water body TEMPPR01 °C -
Conductivity S m -1 Electrical conductivity of the water body by in-situ conductivity cell CNDCPR01 S m -1 -
Transmittance Counts Attenuance (red light wavelength) per unit length of the water body by 25cm path length red light transmissometer ATTNDR01 per metre Information on the conversion from raw counts to attenuance is available in the transmissometer processing document.
- - Practical salinity of the water body by conductivity cell and computation using UNESCO 1983 algorithm PSALPR01 Dimensionless This variable was derived by BODC following Fofonoff and Millard (1983).

The reformatted data were visualised using the in-house EDSERPLO software. Suspect data were marked by adding an appropriate quality control flag, missing data by both setting the data to an appropriate value and setting the quality control flag. Any channels which comprised entirely of absent data indicators were excluded from the final qxf.

References

Fofonoff, NP and Millard, RC. 1983. Algorithms for computations of fundamental properties of seawater. UNESCO Technical Papers in Marine Science, 44, p.53.

Sea-Tech Transmissometer BODC data processing

The Data Originator calibrated the Sea-Tech transmissometer against the CTD transmissometer by strapping it to the CTD and holding it at a specified depth for approximately 10 minutes during the calibration cast. BODC then determined the mean counts logged by the moored transmissometer and mean beam attenuation measured by the CTD transmissometer, which were used to calculate the reference counts value using the equation:

c = -(1/r)*ln((Count - BP)/(Ref - BP))

where

c = mean beam attenuation (m -1 ) from the CTD transmissometer at calibration depth
r = transmissometer pathlength (m)
Count = mean count logged at calibration depth
BP = blocked path counts
Ref = reference counts

Once calculated, Ref was substituted into the equation, allowing c (beam attenuation) to be calculated for the transmissometer time series while the series was being reformatted. The formula produced infinity values when performed on cycles which had a count of zero. The values of these data points were changed to -1, the BODC absent data value for this parameter.

Calibration details are shown in the table below.

Series
ID
POL
Rig
Cruise Transmissometer
serial no.
CTD
Cast
Ref
(counts)
BP
(counts)
r
(m)
Comments
592951 851 PD20_02 ST637 Cast 1 698.83 0 0.25 -
636845 854 PD24_02 ST557 Cast 1 902.57 0 0.25 -
646317 856 PD31_02 ST637 N/A 698.83 0 0.25 No data from calibration cast. Therefore used coefficients from last calibration of ST637 on POL Rig 851
646330 858 PD35_02 ST556 Cast 1 979.88 1.25 0.25 -
646262 861 PD02_03 ST557 Cast 1 671.94 0 0.25 -
646274 864 PD10_03 ST631 Cast 1 844.62 1.6 0.25 -
646286 866 PD17_03 ST557 Cast 1 825.60 0 0.25 -
646298 869 PD23_03A ST556 N/A 979.88 1.25 0.25 Unreliable calibration cast, therefore coefficients used from last calibration of ST556 on POL Rig 858
646305 872 PD25_03B ST556 N/A 979.88 1.25 0.25 No calibration cast, therefore coefficients used from last calibration of ST556 on POL Rig 858
646329 878 PD31_03 ST637 Cast 1 685.85 0 0.25 -
646993 880 PD34_03 ST557 Cast 1 730 0 0.25 -
646993 883 PD38_03 ST631 Cast 1 767.5 0.4 0.25 -
662692 890 PD06_04 ST557 Cast 1 951.4 0 0.25 -
662735 892 PD11_04 ST637 Cast 1 491.6 0.2 0.25 -
664207 896 PD18_04 ST637 Cast 1 697.5 0 0.25 -
664324 898 PD22_04 ST637 Cast 1 604.1 1.5 0.25 -
664336 900 PD29_04 ST557 Cast 1 680.6 0 0.25 -
664348 902 PD32_04 ST637 Cast 1 444.6 0.361702 0.25 -

General Data Screening carried out by BODC

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

Header information is inspected for:

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

Data cycles are inspected using time or depth series plots of all parameters. Currents are additionally inspected using vector scatter plots and time series plots of North and East velocity components. 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 data values will not be altered.

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

If a large percentage of the data is affected by irregularities then a Problem Report will be written rather than flagging the individual suspect values. Problem Reports are also used to highlight irregularities seen in the graphical data presentations.

Inconsistencies between the characteristics of the data set and those of its neighbours are sought and, where necessary, documented. This covers inconsistencies such as the following:

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

Proudman Oceanographic Laboratory Coastal Observatory

The Coastal Observatory was established by Proudman Oceanographic Laboratory as a coastal zone real time observing and monitoring system. The main objective is to understand a coastal sea's response both to natural forcing and to the consequences of human activity. Near real-time measurements will be integrated with coupled models into a pre-operational coastal prediction system whose results will be displayed on the World Wide Web.

The Observatory is expected to grow and evolve as resources and technology allow, all the while building up long time series. A site selection pilot study was carried out in September 2001 and the Observatory became operational in August 2002.

The site is located in Liverpool Bay and is subject to typical coastal sea processes, with strong tides, occasional large storm surges and waves, freshwater input, stable and unstable stratification, high suspended sediment concentration and biogeochemical interaction. Measurements and monitoring will focus on the impacts of storms, variations in river discharge (especially the Mersey), seasonality and blooms in Liverpool Bay.

A variety of methods will be used to obtain measurements, including:

  1. Moored instruments for in situ time series of currents, temperature and salinity profiles, and surface waves and meteorology. It is hoped that turbidity and chlorophyll measurements will be made at another site as the Observatory progresses;
  2. The Cefas Smartbuoy for surface properties such as nutrients and chlorophyll, starting late 2002;
  3. R.V. Prince Madog to carry out spatial surveys and service moorings;
  4. Instrumented ferries for near surface temperature, salinity, turbidity, chlorophyll and nutrients. The first route will be Liverpool to Douglas, Isle of Man, starting late 2002;
  5. Drifters for surface currents and properties such as temperature and salinity, starting in 2004;
  6. Tide gauges, with sensors for meteorology, waves, temperature and salinity, where appropriate;
  7. Meteorological data from Bidston Observatory and Hilbre Island, HF radar and tide gauge sites;
  8. Shore-based HF radar measuring waves and surface currents out to a range of 50 km, starting in 2003;
  9. Satellite data, with infrared for sea surface temperature and visible for chlorophyll and suspended sediment.

The partners currently involved with the project are listed below:

A summary of Coastal Observatory cruises to date on R.V. Prince Madog is given in the table below:

Year No. of cruises Work summary
2001 1 Site selection and pilot study. 95 CTD casts.
2002 4 POL moorings deployed and serviced
Cefas Waverider and SmartBuoy deployed and serviced
103 CTD casts
2003 10 POL moorings serviced
Cefas Waverider and SmartBuoy serviced
341 CTD/LISST casts
2004 9 POL moorings serviced
Cefas Waverider and SmartBuoy serviced
347 CTD/LISST casts
2005 9 POL moorings serviced
Cefas Waverider and SmartBuoy serviced
268 CTD/LISST casts
2006 11 POL moorings serviced
Cefas Waverider and SmartBuoy serviced
508 CTD/LISST casts
2007 9 POL moorings serviced
Cefas Waverider and SmartBuoy serviced
471 CTD/LISST casts
2008 9 POL moorings serviced
Cefas Waverider and SmartBuoy serviced
260 CTD/LISST casts
2009 7 POL moorings serviced
Cefas Waverider and SmartBuoy serviced
213 CTD/LISST casts
2010 8 POL moorings serviced
Cefas Waverider and SmartBuoy serviced
268 CTD/LISST casts
2011 6 POL moorings serviced
Cefas Waverider and SmartBuoy serviced
307 CTD/LISST casts to date, ongoing

Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 2004-06-09
End Date (yyyy-mm-dd) 2004-07-20
Organization Undertaking ActivityProudman Oceanographic Laboratory (now National Oceanography Centre, Liverpool)
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierPOLRIG898
Platform Categoryfixed benthic node

Proudman Oceanographic Laboratory Rig#898

This rig was a seabed frame, deployed as part of the Liverpool Bay Coastal Observatory during R.V. Prince Madog cruise PD22_04. The deployment was completed by 15:00 GMT in good weather but mild rolling.

The seabed frame, D5, was fitted with two Benthos releases; 40266 - 11.0 kHz A, pyro OTD103; and 44056 - 13.5 kHz A, pyro OTD104, along with a spooler with 200m of rope for recovery of the ballast weight.

Recovery of the rig took place during R.V. Prince Madog cruise PD29_04. Some weed was growing on the frame and transmissometer. Recovery was uneventful as conditions were good and the sea was relatively calm throughout (winds ranged between 6-19 ms-1, S, SW, SE).On recovery, the Water Level Recorder was running 25s slow ; the Aanderaa was running 15s slow and the MicroCAT 2s fast.

No speed or direction was recorded by the Aanderaa current meter.

Rig Position 53.5346° N, 3.3593° W
Water Depth 26.6m
Deployed 09 June 2004 12:40 UTC
Recovered 20 July 2004 11:30 UTC
No. of Days 41.0

Instrument Type / Serial Number DSU number Meter Level Parameters Measured Sampling Interval
RD Instruments ADCP 600 kHz Mean Mode / 3036 ; battery case 2390 - 0.5m above seabed Velocity profile 10 minutes
Aanderaa / Sea-Tech Sea-Tech Transmissometer ST637 recording in Aanderaa logger RCM7 / 11820 13101 0.5m above seabed Temperature, conductivity, transmittance 10 minutes
Sea-Bird MicroCAT MicroCAT / 37IM29828-2081,ID=02 - 0.5m above seabed Temperature, conductivity 10 minutes
Aanderaa Water Level Recorder BPR / 1357 8125 0.5m above seabed Pressure, temperature 10 minutes

ADCP = Acoustic Doppler Current Profiler

RCM7 = Recording Current Meter Type 7

BPR = Bottom Pressure Recorder

DSU = Data Storage Unit

Other Series linked to this Data Activity - 1622779 664293 664300

Cruise

Cruise Name PD22/04
Departure Date 2004-06-09
Arrival Date 2004-06-10
Principal Scientist(s)Jason Holt (Proudman Oceanographic Laboratory)
Ship RV Prince Madog

Complete Cruise Metadata Report is available here


Fixed Station Information

Fixed Station Information

Station NameCOA
CategoryOffshore area
Latitude53° 31.51' N
Longitude3° 23.00' W
Water depth below MSL26.0 m

Liverpool Bay Coastal Observatory Mooring Site A (COA/Site 1/Site 9)

This station is the main mooring site for the Proudman Oceanographic Laboratory (POL) Liverpool Bay Coastal Observatory and was first occupied in 2002. It is also known both as Coastal Observatory Site 1 and Site 9. POL perform two main types of activities at this station: they deploy moorings; and in addition, they take CTD profiles during each site visit. The station lies within a box of mean water depth 22.5 m with the following coordinates:

Box Corner Latitude (+ve North) Longitude (+ve East)
North-west corner 53.54097 -3.42958
South-east corner 53.50945 -3.33714

The position of this station relative to the other POL Coastal Observatory sites can be seen from the figure below.

BODC image

Mooring Deployment History

2011

Rig Type Typical Instruments Rig IDs Comment
Frame ADCP, CTD, OBS, OXY 1117, 1121, 1125, 1127, 1130, 1132, January - November
SmartBuoy CTD x 2, AC-S, CT x 2, FL x 3, OBS x 2, PAR x 2, WMS, NAS, OXY, T x 2 1116, 1120, 1124 January - November

2010

Rig Type Typical Instruments Rig IDs Comment
Frame ADCP, CTD, ADV, OBS 1086, 1090, 1094, 1098, 1102, 1106, 1109 January - December
SmartBuoy CT x 2, FL x 2, OBS, PAR x 2, WMS, NAS, CTD, OXY, BD, T 1085, 1089, 1093, 1097, 1101, 1105, 1108, 1112 January - December

2009

Rig Type Typical Instruments Rig IDs Comment
Frame ADCP, CTD, ADV, OBS 1055, 1062, 1067, 1071, 1074, 1078, 1082 January - December
SmartBuoy CT x 2, FL x 2, OBS, PAR x 2, WMS, NAS, CTD, OXY, BD, T 1054, 1061, 1066, 1070, 1073, 1077, 1081 January - December

2008

Rig Type Typical Instruments Rig IDs Comment
Frame ADCP, CTD, ADV, OBS 1024, 1028, 1032, 1036, 1041, 1044, 1047, 1051 January - December
SmartBuoy CT x 2, FL x 2, OBS, PAR x 2, WMS, NAS, CTD, OXY, BD, T LB1_047/1023, LB1_048/1027, LB1_049/1031, LB1_050/1035, 1040, 1043, LB1_053/1050 January - December

2007

Rig Type Typical Instruments Rig IDs Comment
Frame ADCP, CTD, ADV, OBS 990, 997, 1001, 1005, 1010, 1014, 1017, 1021 January - December
SmartBuoy CT x 2, FL x 2, OBS, PAR x 2, WMS, NAS, CTD, OXY, BD, T LB1_039/989, LB1_040/996, LB1_041/1000, LB1_042/1004, LB1_043/1009, LB1_044/1013, LB1_045/1016, LB1_046/1020 January - December

2006

Rig Type Typical Instruments Rig IDs Comment
Frame ADCP, CTD, ADV, OBS 951, 962, 966, 970, 974, 978, 982, 986 January - December
SmartBuoy CT x 2, FL x 2, OBS, PAR x 2, WMS, NAS, CTD, OXY, BD 958, 961, 965, 969, 973, 977, LB1_037/981, LB1_038/985 January - December

2005

Rig Type Typical Instruments Rig IDs Comment
Frame ADCP, CT 913, 914, 921, 925, 929, 933, 938, 942, 945, 949 January - December
SmartBuoy CT, FL, OBS, PAR, WMS, NAS, OXY 912, 920, 924, 928, 932, 937, LB1_028/941, LB1_029/944, LB1_030/948 January - December
Frame with telemetry buoy ADCP 914 March - April

2004

Rig Type Typical Instruments Rig IDs Comment
Frame BPR, ADCP, TR, CT 890, 892, 893, 896, 898, 900, 902, 904, 907, 908, 910, 911 January - December
SmartBuoy CT, FL, OBS, PAR, WMS, NAS 889, 891, 895, 897, 899, 901, 903, 906, 909 January - December
Frame with telemetry buoy ADCP 893, 908, 911 April - May, October - December

2003

Rig Type Instruments Rig IDs Comment
Frame BPR, ADCP, TR, CT 861, 864, 866, 869, 872, 878, 880, 883, 885, 887, 888 January - December
SmartBuoy CT, FL, OBS, PAR, WMS, NAS 863, 865, 867, 870, 871, 877, 879, 882, 884, 886 January - December

2002

Rig Type Instruments Rig IDs Comment
Frame BPR, ADCP, TR, CT 851, 854, 856, 858 August - December
Line mooring CT x 3 853, 855 August - November
SmartBuoy CT, FL, OBS, PAR, WMS, NAS 857, 860 November - December

2001

Rig Type Instruments Rig IDs Comment
Frame ADCP, OBS 838, 839, 840, 841, 843, 844, 845, 846, 848, 849 September

CTD Sampling History

Year Number of Cruises Total Casts per year
2011 6 116 including a 46 cast tidal cycle from 2011-04-18 to 2011-04-19 and a 51 cast tidal cycle station from 2011-07-27 to 2011-07-28
2010 8 71 including a 52 cast tidal cycle station from 2010-04-28 to 2010-04-29
2009 7 21
2008 9 75 including a 54 cast tidal cycle station from 2008-05-13 to 2008-05-14
2007 8 71 including a 51 cast tidal cycle station from 2007-05-15 to 2007-05-16
2006 9 72 including a 53 cast tidal cycle station from 2006-05-09 to 2006-05-10
2005 9 41 including a 22 cast tidal cycle station from 2005-04-05 to 2005-04-06
2004 9 77 including a 54 cast tidal cycle station from 2004-05-11 to 2004-05-12
2003 10 28
2002 4 13

The CTD instrument package for these cruises was a Sea-Bird 911plus, with beam transmissometer, fluorometer, LICOR PAR sensor, LISST-25, and oxygen sensor.

Key

AC-S = Absorption and attenuation spectrophotometer
ADCP = Acoustic Doppler Current Profiler
ADV = Acoustic Doppler Velocimeter
BD = Bacterial degradation experiment
BPR = Bottom Pressure Recorder
CT = Conductivity and temperature logger
CTD = Conductivity, temperature, depth sensor
FL = Fluorometer
NAS = in-situ nutrient analyser
OBS = Optical Backscatter Turbidity meter
OXY = Oxygen sensor
PAR = PAR sensor
T = Temperature logger
TR = Transmissometer
WMS = Automatic water sampler

Other Series linked to this Fixed Station for this cruise - 664268 664281 664293 664300 1194188 1194207 1194219 1194220 1194232 1194244 1194256 1622779

Other Cruises linked to this Fixed Station (with the number of series) - CO 01/12 (5) PD01/08 (17) PD01/11 (14) PD02/03 (10) PD02/05 (11) PD02/07 (15) PD02/09B (17) PD02/10 (15) PD04/06 (1) PD05/10 (16) PD06/04 (12) PD06/07 (16) PD07/08 (14) PD07/11 (17) PD09/06 (11) PD09/07 (64) PD09/08 (16) PD10/03 (9) PD10/10 (14) PD11/04B (13) PD11/05 (9) PD11/11 (57) PD12/05 (2) PD12/09 (16) PD13/07 (14) PD14/08 (67) PD16/06 (9) PD16/07 (15) PD17/03 (12) PD17/10 (15) PD18/04 (13) PD18/05 (11) PD18/09 (17) PD19/08 (2) PD20/02 (7) PD20/06 (9) PD20/07 (17) PD21/05 (10) PD21/10 (15) PD21/11 (9) PD22/06 (9) PD23/03A (10) PD23/07 (15) PD23/08 (13) PD24/02 (2) PD24/09 (17) PD25/03B (12) PD25/05 (11) PD25/06 (9) PD25/11 (7) PD27/07 (17) PD29/04 (12) PD29/06 (9) PD29/08 (14) PD29/10 (17) PD30/05 (10) PD31/02 (11) PD31/03 (12) PD32/04 (12) PD33/08 (5) PD33/09 (16) PD34/03 (12) PD34/05 (10) PD35/02 (11) PD35/06 (14) PD36/10 (16) PD37/06 (14) PD37/08 (18) PD38/03 (13) PD38/04 (12) PD38/09 (16) PD41/05 (11) PD43/11 (11) PD44/03 (7) PD47/09 (15) PD48/03 (5) PD48/04 (8) PD48/05 (10) PD49/10 (14) PD52/04 (8)


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