Metadata Report for BODC Series Reference Number 2207198

• 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

PAP1 Mooring ProOceanus CO₂-Pro CV (30m): DY130 Data Quality Report

After deployment on the 3^rd April 2021, the ProOceanus stopped recording after 71 days on the 13^th June 2021. Upon recovery, it was discovered the tubing that connected the pump to the instrument broke off at some point and, although no flagging was applied by the originator, it was advised to check for abnormalities towards the end of the series. During the screening of the data, BODC 'M' flags were applied to parameters XCO2WTWB and PCO2XXXX from cycle 1811 (20:45:00 2^nd June 2021 UTC) until the end of the series due to a sudden decrease, followed by large variability in the data values.

All parameters were recorded by the same instrument: ProOceanus CO₂-Pro CV (submersible) pCO₂ sensor

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

Pro Oceanus CO2-Pro CV (submersible) pCO2 sensor

An in-situ dissolved gas sensor measuring the partial pressure of CO2 (pCO2) gas dissolved in water using infrared detection. It is designed for deep water applications. The CV notation denotes this is a compact version of the standard Pro-CO2 sensor. An internal zeroing feature provides a stable long-term baseline for ensuring accurate and stable measurements. A flow-through adapter is available. Standard range: 0-600 ppm to 0-10000 ppm. Accuracy: +/-0.5%. Resolution: 0.01 ppm. Depth: 6000 m.

For more information, please see this document: https://www.bodc.ac.uk/data/documents/nodb/pdf/ProOceanusPSIInstrumentSheets2021CO2ProCV.pdf

Processing by BODC of PAP1 Moored ProOceanus CO₂-Pro CV (30m): RRS Discovery DY130

The PAP1 mooring was deployed on 3rd April 2021 on the RRS Discovery cruise DY130 and recovered on the RRS James Cook cruise JC231 on 5th May 2022. The measurements made by the Pro-Oceanus instruments were supplied to BODC in .csv files. The Pro-Oceanus CO₂ data were collected from a nominal depth of 30m on a sensor frame suspended underneath the moored buoy. The data were then loaded into BODC's database using established BODC data banking procedures.

More information on the deployment of this instrument can be found in the DY130 cruise report.

Originator variables were mapped to appropriate BODC parameter codes as follows:

pCO₂ was calculated using the following equation:

_pCO₂ = _xCO₂(100%)*P_T

Where:

• _pCO₂ is the partial pressure of CO₂ in the water body in µatm.
• _xCO₂(100%) is the mole fraction of CO₂ in the gas stream at 100% humidity in ppm.
• P_T is the total pressure of the gas stream in atm.

The reformatted data were visualised using in-house software. Any suspect data were flagged using the BODC quality control flags.

Processing by Originator of PAP1 Moored ProOceanus CO₂-Pro CV (30m): RRS Discovery DY130

The ProOceanus CV (SN 33-146-45) instrument recorded from a frame suspended at 30m depth below the PAP1 buoy deployed from 03/04/2021 - 05/05/2022 at the Porcupine Abyssal Plain Sustained Observatory site (PAP-SO) [48° 50' N 016° 30' W] but stopped recording after 71 days (13/06/2021) due to a sensor issue. A seabird pump was used to pump water over the membrane and the equilibrated gas was measured using non-dispersive infrared (NDIR) spectroscopy to measure carbon dioxide. The sensor was configured to take 10 recordings, one per second, every 8 hours at 04:45, 12:45, and 20:45 UTC and to perform an Auto Zero Point Calibration (AZPC) every 12 hours. The sensor was calibrated at Pro-Oceanus and deployed and recovered during the RRS Discovery DY130 and RRS James Cook JC231 cruises respectively.

For more detailed information on deployment and processing see the DY130 and JC231 cruise reports.

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

Moored Instrument Rig PAP1_042021

This rig was deployed as part of the Porcupine Abyssal Plain (PAP) observatory project. 'PAP1_042021' refers to the deployment of mooring number 1 in April 2021 ('042021') located at the PAP Observatory. Further details of the deployment can be found in the DY130 cruise report.

Data summary

Instrumentation

The PAP1 mooring deployed on DY130 was the first complete platform using the MOBILIS surface buoy. The first deployment of the MOBILIS buoy on DY116 being recovered on this cruise did not have a sensor frame at 30m. Although both buoys have a modified keel skirt, the DY116 modification was double the mass of the one deployed on DY130 moving the centre of balance and buoyancy.

Related Data Activity activities are detailed in Appendix 1

Cruise

Complete Cruise Metadata Report is available here

Fixed Station Information

Fixed Station Information

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), EuroSITES, Oceans2025, Fix03 and CLASS 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.

Please note: Near Real Time data is only stored at BODC where delayed mode data were not recovered. All near real time data can be found at the OceanSites GDA and through IFREMER.

Data summary

Status Indicators

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: PAP1_042021

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: Porcupine Abyssal Plain (PAP)

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.