Full Record - GPS and ApRES data relating to the growth of Chasm-1, Brunt Ice Shelf from 2016 to 2023

GPS and ApRES data relating to the growth of Chasm-1, Brunt Ice Shelf from 2016 to 2023

GB/NERC/BAS/PDC/02038

Abstract:
The dataset consists of GPS data recorded from four sites close to Halley VI Research Station, plus ApRES data across the rift from 2017-2019. Both data types provide information on the width of an active rift propagating through the ice shelf. GPS sites advect with flow of the ice shelf, while ApRES is repositioned each year. The data were collected as part of the Lifetime-of-Halley monitoring programme.

This work was funded by NERC grant NE/X014991/1 (RIFT-TIP) and supported by NERC Antarctic Logistics and Infrastructure.

Citation:
Marsh, O., & De Rydt, J. (2025). GPS and ApRES data relating to the growth of Chasm-1, Brunt Ice Shelf from 2016 to 2023 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/3d6fd5ae-e94d-4d0b-a5e9-5779ca84855e

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http://ramadda.data.bas.ac.uk/repository/entry/show?entryid=3d6fd5ae-e94d-4d0b-a5e9-5779ca84855e

PROJECT HOME PAGE

REFERENCE MATERIALS

https://doi.org/10.1038/s41467-025-61796-w

RELATED DATA SET METADATA

SOFTWARE PACKAGES

License

Access:	No restrictions apply.
Use:	Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.

Authors

Name	UK Polar Data Centre
Role(s)	Metadata Author
Organisation	British Antarctic Survey

Name	Oliver J Marsh
Role(s)	Investigator, Technical Contact
Organisation	British Antarctic Survey

Name	Jan De Rydt
Role(s)	Investigator
Organisation	Northumbria University

Basic Information

Creation Date:	2025-04-03
Dataset Progress:	Complete
Dataset Language:	English
ISO Topic Categories:	Inland Waters Oceans
Parameters:	Cryosphere > Glaciers/Ice Sheets > Glacier Motion/Ice Sheet Motion Hydrosphere > Glaciers/Ice Sheets > Glacier Motion/Ice Sheet Motion

Additional Information

Reference:	Marsh, O. J., Arthern, R. J., & De Rydt, J. (2025). Ocean tides trigger ice shelf rift growth and calving. Nature Communications, 16(1). https://doi.org/10.1038/s41467-025-61796-w
Quality:	Dual frequency Raw GPS data have been converted into 5 minute Rinex files. ApRES is in netCDF format. The GPS data are mostly available for each day, although with some gaps in austral winter (July/August). The ApRES data has a high signal to noise ratio (~30 dB) after initial set-up (i.e. in February and March). This generally decreases through the winter and the signal disappears around September each year.
Lineage/Methodology:	The GPS sites were installed between 2016 and 2017 and recorded for 2 hours 15 minutes each day at 30 second resolution. Data was converted from raw Leica format (*.m00) to standard Rinex v2 format using UNAVCO's teqc.exe program. The ApRES was installed in a horizontal configuration with antennas spaced approximately 15 m apart. A metal reflector was installed on the far side of the crack and the peak in reflection indicates the distance across the crack. The ApRES raw DAT format was converted to ApRES raw netCDF format using the bas-apres software (v0.3.0). Details in Marsh et al., 2024.

Extent

Temporal Coverage:
Start Date	2016-01-01
End Date	2023-02-01

Spatial Coverage:
Latitude
Southernmost	-75.6
Northernmost	-75.4
Longitude
Westernmost	-25.7
Easternmost	-25.5
Altitude
Min Altitude	N/A
Max Altitude	N/A
Depth
Min Depth	N/A
Max Depth	N/A

Data Resolution:
Latitude Resolution	N/A
Longitude Resolution	N/A
Horizontal Resolution Range	N/A
Vertical Resolution	N/A
Vertical Resolution Range	N/A
Temporal Resolution	N/A
Temporal Resolution Range	1 minute - < 1 hour

Location:
Location	Antarctica
Detailed Location	Brunt Ice Shelf, Halley VI Research Station

Instrumentation

Sensor(s):	GPS RECEIVERS RADAR ECHO SOUNDERS
Data Collection:	Data collected using Leica GS10 and Leica GX1200 GPS and ApRES.

Storage

Distribution:
Distribution Media	Online Internet (HTTP)
Distribution Size	85 GB
Distribution Format	N/A
Fees	N/A

Data Storage:	Four directories containing GPS Rinex data from four different GPS sites. Three directories containing ApRES netCDF data from 2017, 2018 and 2019.