Metadata Report for BODC Series Reference Number 664207
Metadata Summary
Problem Reports
Data Access Policy
Narrative Documents
Project Information
Data Activity or Cruise Information
Fixed Station Information
BODC Quality Flags
Metadata Summary
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Problem Reports
Aanderaa RCM #11814 was deployed at the seabed at Coastal Observatory mooring site COA from 11/05/2004 until 09/06/2004. The data quality in all channels has been assessed two ways: first on its own merits; and secondly by cross-checking against other instrumentation from the same mooring frame.
For pressure, comparisons were made against pressure data from RDI ADCP #3644 (BODC series 699220), while for the other channels, checks were made against simultaneous SeaBird MicroCat #2991 data (BODC series 664188). The details of the quality assessment are as follows:
Pressure Problem Report
The values recorded by RCM #11814 were erroneous through the deployment. Cross-checks against pressure data from RDI ADCP #3644, and against the deployment cruise ship log, showed that the pressure data from the Aanderaa were much larger than they should be, with an offset between 21.5 and 27 dbar. The sensor had also not recorded the tidal and spring-neap cycles correctly. Therefore, these data should not be used in any circumstances.
Attenuation Problem Report
All data from 04:35 UTC 16/05/2004 until 18:05 UTC 04/06/2004 were flagged as the attenuation signal saturated with values = 9.9 m-1. It is recommended that values recorded within this time not be used and data outside this time period be used with caution.
Data Quality Report
Conductivity
The comparison with the MicroCAT signal showed an offset between the two instruments. The MicroCAT data were positively offset compared to the Aanderaa data by 0.005 - 0.01 S m-1. From 01:05 UTC 01/06/2004 until the end of the deployment, the data were constant at a value of 0.007 S m-1.
Salinity
The comparison with the MicroCAT data showed an offset between the two instruments. The MicroCAT data were positively offset compared to the Aanderaa data. The offset was approximately 0.4 until 22/05/2004, when it decreased to approximately 0.14. From 01:05 UTC 01/06/2004 until the end of the deployment, the data were constant at a value of 0.045.
Data Access Policy
Public domain 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.
The recommended acknowledgment is
"This study uses data from the data source/organisation/programme, provided by the British Oceanographic Data Centre and funded by the funding body."
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 :
-
Paddle wheel rotor magnetically coupled to an electronic counter
-
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.
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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.
-
Quartz clock, accuracy better than 2 sec/day within temperature range 0 to 20°C.
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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.
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Inductive cell conductivity sensor (optional), range 0 to 70mmho/cm standard resolution 0.1 per cent of range.
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Silicon piezoresistive bridge, standard range 0 to 3000 psi (RCM8 to 9000 psi), resolution 0.1% of range.
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Self balancing potentiometer which converts the output from each sensor into a 10 bit binary number for storage on magnetic tape.
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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 specificationsSeaTech 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
- Water path length: 5 cm (for use in turbid waters) to 1 m (for use in clear ocean waters).
- Beam diameter: 15 mm
- Transmitted beam collimation: <3 milliradians
- Receiver acceptance angle (in water): <18 milliradians
- Light source wavelength: usually (but not exclusively) 660 nm (red light)
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.
Data Processing of Aanderaa RCM7 #11818 on POLRIG#896
Data Processing at POL
Prior to deployment, Proudman Oceanographic Laboratory (POL) set up Recording Current Meter 7 (RCM7) #11818 to sample at an interval of 10 minutes. On recovery, POL downloaded data from the instrument logger and applied factory calibrations to the temperature, conductivity, pressure and transmittance channels. The data were then reformatted by POL to a standard ASCII format for display on the Coastal Observatory website. The originator carried out limited quality control checks, which involved looking for obvious anomalies in the data, cross-checking against other datasets and timing checks.
Data Processing at BODC
The data were downloaded from the Coastal Observatory website and converted from ASCII format into BODC internal format using transfer function 'tr243'. The variables in the file were mapped to BODC parameter vocabularies as follows:
| Originator's Parameter | Units | Description | BODC Parameter code | Units | Comments |
|---|---|---|---|---|---|
| Conductivity | S m-1 | Electrical conductivity of the water body by in-situ conductivity cell | CNDCPR01 | S m-1 | - |
| Temperature | Deg(C) | Temperature of the water body | TEMPPR01 | °C | - |
| Pressure | Bars | Pressure (measured variable) exerted by the water body plus atmosphere by fixed in-situ pressure sensor | PRSTPS01 | dbar | Converted during transfer by multiplying values * 10 |
| Transmittance | Counts | Attenuance (red light wavelength) per unit length of the water body by 25 cm path length transmissometer | ATTNMR01 | FTU | Calculated by BODC during transfer. Click for methodology. |
| - | - | Practical salinity of the water body by conductivity cell and computation using UNESCO 1983 algorithm | PSALPR01 | - | Calculated by BODC using method outlined below |
Salinity calculation
Salinity (PSS-78) was computed using the MATLAB sw_salt routine:
- salinity=sw_salt((cond(*10)/sw_c3515,temp*1.00024,pres)
where
- cond = in-situ conductivity
- sw_c3515: MATLAB function that returns conductivity at Salinity = 35, Temperature = 15 degrees Celsius (ITPS-68) and Pressure = 0 dbar
- temp = in-situ temperature (ITS-90)
- 1.00024 = factor to convert temperature from ITS-90 into IPTS-68 (ICES Temperature Scales Guidelines), which is required for the calculation of salinity using this routine.
- pres = in-situ pressure (pressure computed from instrument depth of 21.5 m and mooring latitude 53° 31.98'N; pressure data from instrument are not being used as the values are questionable)
Quality control
The reformatted data were visualised using the in-house EDSERPLO software. Suspect and missing data were marked by adding appropriate quality control flags.
References
Fofonoff, N.P., and R.C. Millard Jr. (1983). Algorithms for computation of fundamental properties of seawater, UNESCO technical paper in marine science 44, 53pp
POLRIG#896 SeaTech Transmissometer Data Processing
Deployment/Recovery Procedure
(J. Howarth/ P.Knight, Proudman Oceanographic Laboratory, Birkenhead)
Prior to deployment during cruise PD18_04, the counts logged by the transmissometer in free air and with the light path blocked were recorded. It was then strapped to the CTD frame, lowered into the water during cast C001 and held at a fixed depth for approximately 20 minutes for intercalibration with the CTD transmissometer.
On recovery during cruise PD22_04 the data were downloaded from the instrument logger and supplied to BODC as raw counts.
Post-Cruise Calibration
(Dr. S.E. Jones, University of Wales, Bangor)
The raw transmission counts were compared with fully corrected CTD attenuance data from the intercalibration cast. The air-correction counts reading (ACR) for each deployment was found from inversion of the formula:
Atten = -(1/p) * ln { (counts-BPR) / (ACR - BPR) }
where:
Atten = CTD attenuance (per metre)
p = path length (metres)
counts = datalogger reading (counts)
BPR = blocked path reading (counts)
ACR = air correction reading (counts)
| CTD Attenuation (per metre) | Instrument pathlength m | Calibration Reading (counts) | Blocked Path Reading (counts) | Air Reading (counts) | Air-Correction Counts |
|---|---|---|---|---|---|
| 2.769663 | 0.25 | 349 | 0 | 691.5625 | 697.5 |
Air correction reading values were calculated at BODC.
BODC Data Processing and Quality Control
The data were then converted from data logger counts to attenuance (per metre) by applying the above calibration formula to each datacycle in the series.
The data were visually screened for evidence of fouling on the optics, leaking power connectors and flat batteries. Obvious spikes and any features believed to be of non-oceanographic origin were flagged suspect.
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:
- Irregularities such as unfeasible values
- Inconsistencies between related information, for example:
- Times for instrument deployment and for start/end of data series
- Length of record and the number of data cycles/cycle interval
- Parameters expected and the parameters actually present in the data cycles
- Originator's comments on meter/mooring performance and data quality
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:
- Spurious data at the start or end of the record.
- Obvious spikes occurring in periods free from meteorological disturbance.
- A sequence of constant values in consecutive data cycles.
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:
- Maximum and minimum values of parameters (spikes excluded).
- The occurrence of meteorological events.
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:
- 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;
- The Cefas Smartbuoy for surface properties such as nutrients and chlorophyll, starting late 2002;
- R.V. Prince Madog to carry out spatial surveys and service moorings;
- 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;
- Drifters for surface currents and properties such as temperature and salinity, starting in 2004;
- Tide gauges, with sensors for meteorology, waves, temperature and salinity, where appropriate;
- Meteorological data from Bidston Observatory, HF radar and tide gauge sites;
- Shore-based HF radar measuring waves and surface currents out to a range of 50 km, starting in 2003;
- 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:
- Proudman Oceanographic Laboratory
- British Oceanographic Data Centre
- UK Meteorological Office
- Centre for Environment, Fisheries and Aquaculture Science
- Environment Agency
- Liverpool University and Port Erin Marine Laboratory
- Bangor University School of Ocean Sciences
- National Oceanography Centre Southampton
- Department of Agriculture and Rural Development in Northern Ireland
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) | 2004-05-11 |
| End Date (yyyy-mm-dd) | 2004-06-09 |
| Organization Undertaking Activity | Proudman Oceanographic Laboratory (now National Oceanography Centre, Liverpool) |
| Country of Organization | United Kingdom |
| Originator's Data Activity Identifier | POLRIG896 |
| Platform Category | subsurface mooring |
Proudman Oceanographic Laboratory Rig#896
This rig was a seabed frame, deployed in 22 m of water at 12:06 UTC 11/05/2004 at Site COA as part of the Liverpool Bay Coastal Observatory during R.V. Prince Madog cruise PD18_04.
The seabed frame, D4, was fitted with two Benthos releases; 44041 - 14.5 kHz A, pyro OTD105; and 44068 - 11.5 kHz A, pyro OTD104, along with a spooler with 200 m of rope for recovery of the ballast weight.
Recovery of the rig took place during R.V. Prince Madog cruise PD22_04. Release 44068 (pyro OTD104) was fired. The mooring retrieval was completed by 15:00 UTC 09/06/2004 in good weather but mild rolling. The Aanderaa Water Level Recorder clock was running 5 s fast ; the transmissometer was running 10 s slow and the MicroCAT was running 9 s fast.
No speed or direction was recorded by the Aanderaa current meter.
| Instrument | Type / Serial Number | DSU Number | Meter Level | Parameters Measured | Sampling Interval |
|---|---|---|---|---|---|
| RD Instruments ADCP | 600 kHz Mean Mode / 3644 ; battery case 0250 | - | 0.5 m above seabed | Velocity profile, heading, pitch, roll, temperature, pressure | 10 minutes |
| Aanderaa / Sea-Tech | Sea-Tech Transmissometer ST557, recording in Aanderaa logger RCM7 / 11814 | 8122 | 0.5 m above seabed | Temperature, conductivity, pressure, transmittance | 10 minutes |
| Sea-Bird MicroCAT | MicroCAT / 37SM32218 -2991, ID=01 | - | 0.5 m above seabed | Temperature, conductivity | 10 minutes |
| Aanderaa Water Level Recorder | BPR / 444 | 3944 | 0.5 m 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 - 664188 664152
Cruise
| Cruise Name | PD18/04 |
| Departure Date | 2004-05-11 |
| Arrival Date | 2004-05-14 |
| Principal Scientist(s) | M John Howarth (Proudman Oceanographic Laboratory) |
| Ship | RV Prince Madog |
Complete Cruise Metadata Report is available here
Fixed Station Information
Fixed Station Information
| Station Name | COA |
| Category | Offshore area |
| Latitude | 53° 31.51' N |
| Longitude | 3° 23.00' W |
| Water depth below MSL | 26.0 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 co-ordinates:
| 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.
Mooring Deployment History
2011
| Rig Type | Typical Instruments | Rig IDs | Comment |
|---|---|---|---|
| Frame | ADCP, CTD, OBS, OXY | 1117 for January cruise. Other frame IDs not available at this time. | January - September |
| 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 for January cruise. Other frame IDs not available at this time. | January - September |
| SparBuoy | AC-S, FL, CTD x 2, T | Frame ID not available at this time. | September |
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 | 7 | 69 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 - 664152 664164 664176 664188
Other Cruises linked to this Fixed Station (with the number of series) - PD01/08 (16) PD02/03 (4) PD02/05 (3) PD02/07 (14) PD02/09B (16) PD02/10 (9) PD05/10 (10) PD06/07 (15) PD07/08 (14) PD09/06 (11) PD09/07 (63) PD09/08 (15) PD10/03 (3) PD10/10 (8) PD11/05 (1) PD11/11 (48) PD12/05 (2) PD12/09 (10) PD13/07 (13) PD14/08 (67) PD16/06 (8) PD16/07 (14) PD17/03 (4) PD17/10 (9) PD18/04 (4) PD18/05 (3) PD18/09 (11) PD19/08 (2) PD20/02 (5) PD20/06 (8) PD20/07 (16) PD21/05 (3) PD21/10 (9) PD22/04 (5) PD22/06 (8) PD23/03A (4) PD23/07 (15) PD23/08 (12) PD24/02 (1) PD24/09 (11) PD25/03B (4) PD25/05 (3) PD25/06 (8) PD25/11 (4) PD27/07 (16) PD29/04 (4) PD29/06 (8) PD29/08 (13) PD29/10 (11) PD30/05 (2) PD31/02 (4) PD31/03 (4) PD32/04 (4) PD33/08 (4) PD33/09 (10) PD34/03 (4) PD34/05 (9) PD35/02 (4) PD35/06 (13) PD36/10 (10) PD37/06 (13) PD37/08 (17) PD38/03 (5) PD38/04 (4) PD38/09 (10) PD41/05 (10) PD43/11 (3) PD47/09 (9) PD48/05 (10) PD49/10 (7)
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 |
