Metadata Report for BODC Series Reference Number 1225853

Metadata Summary

Data Description

Data Category Hydrography time series at depth
Instrument Type
Sea-Bird SBE 37-IM MicroCAT C-T Sensor  water temperature sensor; salinity sensor
Instrument Mounting subsurface mooring
Originating Country United Kingdom
Originator Dr Richard Lampitt
Originating Organization National Oceanography Centre, Southampton
Processing Status banked
Project(s) Oceans 2025 Theme 10 SO2: PAP

Data Identifiers

Originator's Identifier PAP1_062007_CTD_3279
BODC Series Reference 1225853

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2007-06-22 18:00
End Time (yyyy-mm-dd hh:mm) 2007-07-25 02:00
Nominal Cycle Interval 7200.0 seconds

Spatial Co-ordinates

Latitude 49.01630 N ( 49° 1.0' N )
Longitude 16.40200 W ( 16° 24.1' W )
Positional Uncertainty Unspecified
Minimum Sensor Depth 90.0 m
Maximum Sensor Depth 90.0 m
Minimum Sensor Height 4750.0 m
Maximum Sensor Height 4750.0 m
Sea Floor Depth 4840.0 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 Instantaneous - Depth measured below water line or instantaneous water body surface
Sea Floor Depth Datum Instantaneous - Depth measured below water line or instantaneous water body surface


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
CNDCPR01 1 Siemens per metre InSituCond Electrical conductivity of the water body by in-situ conductivity cell
PREXMCAT 1 Decibars Pres_MCat Pressure (measured variable) exerted by the water body by semi-fixed moored SBE MicroCAT
PSALPR01 1 Dimensionless P_sal Practical salinity of the water body by conductivity cell and computation using UNESCO 1983 algorithm
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

PAP Mooring Data Quality Report

This is a data quality report for the 7th deployment of PAP (Porcupine Abyssal Plain) Observatory mooring number 1, referred to as PAP1_062007 throughout BODC tables and documents.

This mooring came adrift shortly after deployment (the data originator's history of events is given below) with the result that all data recorded by some microcats after 12th July 2007, and by all microcats after 15th July 2007 should be treated as suspect.

30th July 2007
The inductive data link connecting the sensors to the satelite transmission system has been deteriorating for some days and data is now only being received sporadically.

9th August 2007
The mooring has moved off station and appears to be drifting at about 1km/hr. The sensor package at 30m is still attached to the surface mooring.

5th September 2007
It has just been reported that the adrift part of the PAP observatory, with all sensors down to 1000m, had been successfully recovered by the research ship Pelagia. Many thanks to the science team and deck crew for their efforts. The recovered parts will be examined to determine the cause of the failure.

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

Sea-Bird SBE37-IM MicroCAT

The SBE 37-IM MicroCAT is a high accuracy conductivity and temperature recorder (pressure optional) with a built in Inductive Modem, which provides reliable, low-cost, real-time data transmission. Designed for moorings and other long-duration, fixed-site deployments, MicroCATs have non-corroding titanium housings rated for operation to 7000 metres or pressure sensor full scale-range.

Communication with the MicroCAT is via a Surface Inductive Modem (SIM) to a computer or data logger. Commands and data are transmitted half-duplex between the SIM and the MicroCAT using DPSK (differential-phase-shift-keyed) telemetry. As a safe guard, the MicroCAT simultaneously backs up the data in its non-volatile internal memory as well as transmitting the data via telemetry.

The MicroCAT's aged and pressure-protected thermistor has a long history of exceptional accuracy and stability (typical drift is less than 0.002 °C per year). Electrical isolation of the conductivity electronics eliminates any possibility of ground-loop noise.


Conductivity (S m -1 ) Optional Pressure
Measurement Range -5 to +35 0 to 7 (0 to 70 mS cm -1 ) 0 to full scale range: 20 / 100 / 350 / 600 / 1000 / 2000 / 3500 / 7000 metres
Initial accuracy 0.002 0.0003 0.1% of full scale range
Typical Stability 0.0002 per month 0.0003 per month 0.05% of full scale range per year
Resolution 0.0001 0.00001 0.002% of full scale range
Sensor Calibration +1 to +32 0 to 6; physical calibration over range 2.6 to 6 S m -1 , plus zero conductivity (air) Ambient pressure to full scale range in 5 steps
Memory 8 Mbyte non-volatile FLASH memory
Data Storage Converted temperature and conductivity: 5 bytes per sample (2.5 bytes each)
Time: 4 bytes per sample
Pressure (optional): 2 bytes per sample
Real-Time Clock 32,768 Hz TCXO accurate to ±1 minutes year -1
Standard Internal Batteries 10.6 Ampere-hour pack consisting of 12 AA lithium batteries. Provides sufficient capacity for more than 200,000 samples for a typical sampling scheme
Housing Titanium pressure case rated at 7000 metres
Weight (without pressure) In water: 2.4 kg
In air: 4.0 kg

Further information can be found via the following link: Sea-Bird SBE37-IM MicroCAT Datasheet

Project Information

Oceans 2025 Theme 10, Sustained Observation Activity 2: Porcupine Abyssal Plain Ocean Observatory

The NERC Delivery Plan (2005) gives priority to developing ocean observing systems to detect climate change and its impact on ecosystems. One of the most effective ways to achieve this is by fixed point time-series eulerian observatories equipped with a diverse array of physical, biological and biogeochemical sensors. The Porcupine Abyssal Plain (PAP) observatory, involving high frequency measurements of both water column and seafloor processes, is the only UK open ocean observatory which meets these criteria. The PAP site has been monitored through a variety of projects since 1989. The National Oceanogaphy Centre, Southampton (NOCS) will manage all monitoring activities at the PAP site for Oceans 2025. Spatial context to Sustained Observation Activity (SO) 2 will be provided by the Atlantic Meridional Transects (AMT) in SO 1 and by a Continuous Plankton Recorder (CPR) route (SO 15) which pass nearby.

More detailed information on this Work Package is available at pages 9 - 11 of the official Oceans 2025 Theme 10 document: Oceans 2025 Theme 10


Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 2007-06-22
End Date (yyyy-mm-dd) 2007-09-05
Organization Undertaking ActivityNational Oceanography Centre, Southampton
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierPAP1_062007
Platform Categorysubsurface mooring

Moored Instrument Rig PAP1_062007

This rig was deployed as part of the Porcupine Abyssal Plain (PAP) observatory project. 'PAP1_062007' refers to the deployment of mooring number 1 in June 2007 ('062007') located at the PAP Observatory. This was the seventh deployment of this mooring configuration at the PAP site, under this project.

Data summary

Deployment cruise RV Celtic Explorer CE0716
Recovery cruise RV Pelagia PE275


The mooring design is an 'S' tether configuration allowing the mooring to better withstand the extremes of the environment it is in. The main surface buoy is a Toroid type buoy, and below this buoy are 30 meters of chain with a conducting cable running along side. The chain is there to take the loads that the mooring will experience and the cable is a vehicle for the data. Attached to the bottom of the chain is the instrument frame, within which are five different instruments, and coming out of the bottom of the frame is a 10mm jacketed wire, 1000 meters long. Along the wire, at pre-determined points, there are eleven SBE 37 CTDs, all of which have built in modems allowing their data to be part of the telemetry system.

Instrument Serial number Nominal depth
Envirotech NAS-3X nutrient analyzer Unknown 30m
MBARI ISUS nitrate sensor Unknown 30m
SAMI Carbon Dioxide sensor Unknown 30m
Wetlabs fluorometer FLNTUSB-270 30m
Sea-Bird SBE 37 CTD SN 4465 ID40 30m
Sea-Bird SBE 37 CTD SN 4463 ID41 45m
Sea-Bird SBE 37 CTD SN 3280 ID42 60m
Sea-Bird SBE 37 CTD SN 4798 ID43 75m
Sea-Bird SBE 37 CTD SN 3279 ID44 90m
Sea-Bird SBE 37 CTD SN 3889 ID45 110m
Sea-Bird SBE 37 CTD SN 4460 ID46 130m
Sea-Bird SBE 37 CTD SN 4069 ID47 150m
Sea-Bird SBE 37 CTD SN 4063 ID48 200m
Sea-Bird SBE 37 CTD SN 3795 ID49 250m
Sea-Bird SBE 37 CTD SN 4061 ID50 300m
Sea-Bird SBE 37 CTD SN 4073 ID51 1000m

Other Series linked to this Data Activity - 1225828 1225841 1058137 1225816 1225865 1225877 1225889 1225908 1225804 1225933 1083405 1225890 1225921


Cruise Name CE0716
Departure Date 2007-06-19
Arrival Date 2007-06-25
Principal Scientist(s)Richard Stephen Lampitt (National Oceanography Centre, Southampton)
Ship Celtic Explorer

Complete Cruise Metadata Report is available here

Fixed Station Information

Fixed Station Information

Station NamePorcupine Abyssal Plain (PAP)
CategoryOffshore location
Latitude49° 0.00' N
Longitude16° 30.00' W
Water depth below MSL4800.0 m

Porcupine Abyssal Plain (PAP) Observatory

The Porcupine Abyssal Plain (PAP) observatory is a site at which moorings were deployed in the Northeastern Atlantic, as part of the ANIMATE (Atlantic Network of Interdisciplinary Moorings and Time-series for Europe), MERSEA (Marine Environment and Security for the European Area) and then EuroSITES projects. The PAP site is centred at latitude 49° N and longitude 16.5° W. Moorings have occupied this region since 2002 and are typically deployed for 12 months.

Data summary

Mooring deployment Temperature salinity pressure ADCP Chlorophyll Sediment trap Current meter Nitrate Carbon dioxide Oxygen Irradience
Real time Delayed mode Real time Delayed mode Real time Delayed mode Real time Delayed mode Real time Delayed mode Real time Delayed mode Real time Delayed mode
PAP1 Oct 2002-Jun 2003 Data Data Data NT UD Data - Data NT Data NT SF - - - -
PAP2 Jul 2003-Nov 2003 CF Data Data NT Data Data - Data NT Data NT Data - - - -
PAP3 Nov 2003-Jun 2004 Data Data Data NT Data Data - Data NT Data NT Data - - - -
PAP4 Jun 2004-Jul 2005 Data Data Data NT Data Data - Data NT UD NT Data - - - -
PAP5 Jul 2005-Jun 2006 Data Lost Lost NT Lost Data - Data NT Lost NT Lost - - - -
PAP6 Jul 2006-Jul 2007 ND ND ND ND ND Data - Data ND ND ND ND - - - -
PAP7 Jun 2007-Aug 2007 Data Lost ND Data Data NYR - NYR SF SF NT Data - - - -
PAP 200905 May 2009-Jul 2009 Data Data - Data Data - - - Data Data SF SF - Data - -
PAP 201005 May 2010- Data - - Data - - Data - Data - Data - Data - Data -

Status Indicators

Indicator Description
Data Data received from mooring
Lost Data not received
SF Sensor failed
ND Not deployed
NYR Not yet recovered
CF Communications failure
UD Unusable data
NT Not telemetered

Other Series linked to this Fixed Station for this cruise - 888088 888107 888119 888120 888132 888144 888156 888168 888181 888193 888200 945170 1058137 1083405 1225804 1225816 1225828 1225841 1225865 1225877 1225889 1225890 1225908 1225921 1225933

Other Cruises linked to this Fixed Station (with the number of series) - CD158 (13) D266 (11) D341 (35) DY077 (22) JC034T (4) JC071 (2) JC085 (10) M108 (1) PO300_1 (12) PO306 (14)

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