Metadata Report for BODC Series Reference Number 2205420

• Metadata Summary

• Problem Reports

• Data Access Policy

• Narrative Documents

• Project Information

• Data Activity or Cruise Information

• Fixed Station Information

• BODC Quality Flags

• SeaDataNet Quality Flags

Metadata Summary

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

Sea-Bird SBE 37 SMP-ODO {MicroCAT-CTP-DO} (submersible) CTD logger

A high accuracy conductivity and temperature recorder with an integrated pressure sensor and Optical Dissoved Oxygen sensor (ODO) designed for deployment on moorings. The SM model uses a serial interface (SM) for real-time data transmissions and has internal batteries. The device is fitted with an integral pump (P).

For more information, please see this document: https://www.bodc.ac.uk/data/documents/nodb/pdf/SeaBird-datasheet-SBE37-SMP-ODO-July18.pdf

Sea-Bird SBE Deep SeapHOx V1 conductivity, temperature, pressure, pH, and dissolved oxygen system

The Sea-Bird Deep SeapHOx combines the Satlantic Deep SeaFET pH sensor with the Sea-Bird Electronics SBE 37-SMP-ODO MicroCAT CTD+DO sensor. The Deep SeaFET adapts the MBARI/ SIO/ Honeywell Deep-Sea DuraFET technology to measure pH in a deep moored package. The Deep SeapHOx allows for the integrated data collection of pH with measurement of temperature, salinity, and oxygen. The integrated package also allows the SeaFET to take advantage of the SBE 37's pumped flow path and anti-fouling technology, extending deployment duration in some cases. Outputs include pH, conductivity, temperature, pressure, and optical dissolved oxygen. The conductivity ranges from 0 to 7 S/m with an accuracy of 0.0003 S/m, and resolution of 0.00001 S/m. Temperature ranges from -5 to 45 degC with an accuracy of 0.002 degC (-5 to 35 degC) or 0.01 degC (35 to 45 degC), and resolution of 0.0001 degC. Pressure ranges to 20 m, 100 m, 350 m, 600 m, 1000 m, 2000 m, accuracy 0.1 percent of full scale range, and resolution 0.002 percent of full scale range. Dissolved oxygen ranges to 120 percent of surface saturation, accuracy to 3 µmol/kg or 2 percent, and resolution 0.2 µmol/kg. pH ranges from 6.5 to 9, accuracy 0.02, and resolution 0.004. Depth rating is 2000 m.

For more information, please see this document: https://www.bodc.ac.uk/data/documents/nodb/pdf/Sea-Bird_Deep_SeapHOxV1May24.pdf

Processing by BODC of SeapHOx data from UK OSNAP mooring RTEB1 from July 2018 to October 2020.

SeapHOx data (Temperature, Salinity, Pressure, Dissolved Oxygen and pH) from mooring RTEB1 of the Eastern Boundary array (Rockall Trough) were submitted to BODC in a .SeapHOx file format. The moored Sea-Bird SBE 37 MicroCat SMP-CTP-ODO (submersible) CTD sensor and Satlantic SeaFET V1 were situated at 50m on mooring RTEB1. The instruments were deployed on cruise AR30-04 (2018) and recovered on DY120 (2020). The file was converted to QXF (BODC internal NetCDF) and originator's variables were mapped to BODC parameter codes.

Processing by Originator of SeapHOx data from UK OSNAP mooring RTEB1 from July 2018 to October 2020.

Data Acquisition

The dataset consists of Temperature, Salinity, Pressure, Dissolved Oxygen and pH data collected by a moored CTD-DO-pH instrument (Deep SeapHOx) in the eastern Rockall Trough between July 2018 and March 2020. The moored CTD-DO-pH instrument was situated at around 50 m on mooring RTEB1 which is the easternmost mooring of the Atlantic-wide OSNAP mooring array. The CTD-DO-pH instrument was first deployed on cruise AR30-04 (2018) and recovered on DY120 (2020). The data have been processed and calibrated. Mooring RTEB1 is deployed under UK OSNAP (NE/K010875/1 and NE/K010875/2). The CTD-DO-pH instrument was funded by the European Union’s Horizon 2020 Research and Innovation Programme under grant agreement nos. 678760 (ATLAS) and 818123 (iAtlantic).

The instrument used was a Sea-Bird SBE 37 MicroCat SMP-CTP-ODO (submersible) CTD sensor s/n 15476 and a Satlantic SeaFET V1 {Sea-Bird Scientific} (shallow) pH sensor s/n 0117. The SBE 37 MicroCat was deployed on cruise AR30-04 in 2018, and retrieved on cruise DY120 in 2020. The sampling interval was set to 3600s,with a burst frame of 1, and a sample average of 30s. The instrument was deployed at 50m on mooring EB1.

Calibration

Deep SeapHOx (SBE Deep SeapHOx) - single point moored CTD, DO and pH instrument. CTD data calibrated to a pre-deployment and post-recovery calibration dip and processed as described in Houpert et al., 2020 and Fraser et al., 2022. DO data calibrated in-situ to a post-deployment and pre-recovered nearby cast with a calibrated lowered DO sensor. pH sensor calibrated to pH derived from bottle samples from a nearby post-deployment and pre-recovered CTD cast. Bottle pH was derived using CO2SYS from dissolved inorganic carbon, total alkalinity, silicate and phosphate measured from lowered rosette bottle samples.

The conductivity data appeared reasonable until the record stopped on the 10th March 2020 when the SeaFET 117 ran out of battery. The pressure, temperature, and oxygen sensors were found to be working as expected during the cal-dips. Salinity data from an adjacent SBE37 (s/n 11290) has been used to correct the oxygen data after the SBE37-ODO data record stopped.

AR30-04 Deployment Cruise report

Further information can be found in the AR30-04 Cruise report.

DY120 Recovery Cruise report

Further information can be found in the DY120 Cruise report.

Project Information

Marine LTSS: CLASS (Climate Linked Atlantic Sector Science)

Introduction

CLASS is a five year (2018 to 2023) programme, funded by the Natural Environment Research Council (NERC) and extended until March 2024.

Scientific Rationale

The ocean plays a vital role in sustaining life on planet Earth, providing us with both living resources and climate regulation. The trajectory of anthropogenically driven climate change will be substantially controlled by the ocean due to its absorption of excess heat and carbon from the atmosphere, with consequent impacts on ocean resources that remain poorly understood. In an era of rapid planetary change, expanding global population and intense resource exploitation, it is vital that there are internationally coordinated ocean observing and prediction systems so policy makers can make sound evidence-based decisions about how to manage our interaction with the ocean. CLASS will underpin the UK contribution to these systems, documenting and understanding change in the marine environment, evaluating the impact of climate change and effectiveness of conservation measures and predicting the future evolution of marine environments. Over the five-year period CLASS will enhance the cost-effectiveness of observing systems by migrating them towards cutting edge autonomous technologies and developing new sensors. Finally, CLASS will create effective engagement activities ensuring academic partners have transparent access to NERC marine science capability through graduate training partnerships and access to shipborne, lab based and autonomous facilities, and modelling capabilities.

Data Activity or Cruise Information

Data Activity

Ellett Array Moored Instruments EB1 2018-2020

This rig was deployed as part of the Rockall Trough Ellett Array.

The rig was held down by an 2100 kilogram anchor on the seabed at 1800 metres depth. It was kept erect by 40" syntactic float at 488 metres depth and a 31" syntactic float at 48 metres depth.

The instruments deployed on the rig were as follows:

ATLAS and AtlantOS funded sensors

Some of the sensors deployed on mooring RTEB1 were funded by ATLAS and AtlantOS. These were:

• SBE DeepSeaPhOx (CTD + O2 + pH) at 50 m (funded ATLAS)
• SBE SMP37 ODO (CTD + O2) at 750 m and 950 m (1 funded ATLAS, 1 funded AtlantOS)

The funding acknowledgement for the ATLAS and AtlantOS sensor data is:

'This project has received funding from the European Union's Horizon 2020 research and innovation programme, under grant agreement No 678760 (ATLAS) and No 633211 (AtlantOs). This output reflects only the author's view and the European Union cannot be held responsible for any use that may be made of the information contained therein.'

Issues with sensors

The following sensors had data issues:

• SBE SMP37-ODO MicroCAT S/N 15254 was affected by water ingress and no data was returned
• SBE SMP37-ODO MicroCAT S/N 15298 had unreliable conductivity and oxygen data between February to March 2020
• Nortek Aquadopp S/N 11069 returned no data between 2018-2020
• DeepSeaPhOx (seaFET S/N 0117 and SMP37-ODO S/N 15476) stopped recording data in September 2019

Related Data Activity activities are detailed in Appendix 1

Cruise

Complete Cruise Metadata Report is available here

Fixed Station Information

Fixed Station Information

UK-OSNAP/Ellett Array Mooring RTEB1 (OM57)

Mooring RTEB1 (called OM57 by the International OSNAP Community) forms part of the OSNAP-East Transect and, from 2018, the Ellett Array. It was first deployed on 18^th July 2014 by the UK-OSNAP Community.

It is located at 57.0993°N, 9.5480°W where there is a water depth of 1975m

Between 2014 and 2018 this mooring was funded by UK-OSNAP, from 2018 it was funded as part of the Ellett Array by CLASS (Climate Linked Atlantic Sector Science).

Related Fixed Station activities are detailed in Appendix 2

BODC Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:

SeaDataNet Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:

Appendix 1: RTEB1_05_2018

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.

Appendix 2: UK-OSNAP/Ellett Array Mooring RTEB1 (OM57)

Related series for this Fixed Station 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.