Date (Creation)

2022-10-06

Date (Revision)

2022-10-06

Date (Publication)

2022-10-06

Date (released)

2022-10-06

Edition

1.0

Unique resource identifier

https://doi.org/10.5285/eb2f66fa-1c64-49af-b9e8-ce3124ce3c03

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/01672

Codespace

https://data.bas.ac.uk/

Unique resource identifier

NE/L013770/1

Codespace

award

Other citation details

Please cite this item as: Davis, P., & Jenkins, A. (2022). Autosub Long Range beneath Ronne Ice Shelf (2018): hydrographic, velocity and turbulence observations along the Modified Warm Deep Water Inflow (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/eb2f66fa-1c64-49af-b9e8-ce3124ce3c03

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey	Davis, Peter E.D.		Author
Northumbria University	Jenkins, Adrian		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency

As needed

Maintenance note

Completed

Global Change Master Directory (GCMD) Science Keywords

• EARTH SCIENCE > Oceans > Ocean Acoustics > Acoustic Velocity
• EARTH SCIENCE > Oceans > Ocean Circulation > Turbulence
• EARTH SCIENCE > Oceans > Ocean Temperature > Water Temperature
• EARTH SCIENCE > Oceans > Marine Environment Monitoring

Theme

• Antarctica

• Autosub Long Range

• Hydrography

• Ronne Ice Shelf

• Turbulence

• Velocity

Place

• Ronne Ice Shelf Antarctica

GEMET - INSPIRE themes, version 1.0

• Oceanographic geographical features

Access constraints

Other restrictions

Other constraints

no limitations to public access

Access constraints

Other restrictions

Other constraints

no limitations

Use constraints

License

Other constraints

Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

Data released under Open Government Licence V3.0:

Use constraints

Other restrictions

Other constraints

None.

Unique resource identifier

url

Codespace

url

Association Type

Larger work citation

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Environment
• Oceans

Begin date

2018-02-09

End date

2018-02-10

Supplemental Information

It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.

Title

European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication)

2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier

urn:ogc:def:crs:EPSG::3031

Version

6.18.3

Hierarchy level

Dataset

Statement

Methodology:

All data were collected during the PS111-expedition to the southern Weddell Sea onboard the German research icebreaker RV Polarstern.

CTD

Hydrographic data were collected using a Seabird SBE-52 CTD that contains a ducted, pumped conductivity-temperature channel and samples at a rate of 1 Hz. The SBE-52 was mounted towards the front of ALR with the inlet and exhaust ducts attached to a pair of ports in the vehicle's hull.

ADCP

Velocity data were gathered using two Teledyne RDI 300 kHz Workhorse Acoustic Doppler Current Profilers (ADCPs). Both upward and downward looking ADCPs were configured in bottom track mode with 8 m bins and used for navigation as well as current measurements. Each ADCP was set to ping once every 2 seconds, with half-second ping separation between instruments to avoid interference, and the raw velocity data were processed using 5-ping (10 second) averaging. Current velocities in the vehicle frame were calculated by subtracting the bottom track velocity from the raw upwards and downwards-looking water track velocities and were then rotated into a geographic reference frame using the vehicle's heading.

Turbulence

Turbulence data were sampled using a front-mounted Rockland Scientific International (RSI) MicroRider turbulence package. The RSI MicroRider package had four microstructure probes sampling at a rate of 512 Hz: two orthogonally positioned shear probes and two thermistor probes. The turbulence data were processed using standard methods in the Rockland Scientific ODAS MATLAB Library.

Data collection:

Seabird SBE-52 Conductivity, Temperature and Depth sensor

Two Teledyne RDI 300 kHz Workhorse Acoustic Doppler Current Profilers

Rockland Scientific International (RSI) MicroRider turbulence package

Data quality:

From the Seabird SBE-52 Conductivity, Temperature and Depth sensor, the temperature data has an accuracy of ±0.002 °C and the conductivity data has an accuracy of ±0.0003 S/m. Post-deployment, the SBE-52 was calibrated against ship-based CTD casts taken from RV Polarstern, with small corrections made to both temperature (+0.0024°C) and conductivity (+0.0002 S/m). The stated accuracy of the Teledyne RDI 300 kHz Workhorse ADCPs is 0.5% of the water velocity relative to the ADCP ± 0.5 cm/s. The stated accuracy of the shear probes in the Rockland Scientific International MicroRider turbulence package is 5%. Missing values are indicated with a value of -9999.

Metadata

File identifier

eb2f66fa-1c64-49af-b9e8-ce3124ce3c03 XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2022-10-06

Metadata standard name

ISO 19115 Geographic Information - Metadata

Metadata standard version

ISO 19115:2003(E)

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact