Zeising, Ole; Steinhage, Daniel; Humbert, Angelika (2021): Autonomous phase-sensitive radar (ApRES) measurements at a basal melt channel of the southern Filchner Ice Shelf, Antarctica between 2016/17 and 2017/18 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.932413
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Abstract:
The dataset consists of raw data from six autonomous phase-sensitive radar (ApRES) measurements. The ApRES with two bow-tie antennas were operated at a basal melt channel of the southern Filchner Ice Shelf, Antarctica near the Support Force Glacier. Five short-period ApRES were located at a cross-section of the channel, located east outside the channel (ApRES_oe), at the eastern steepest flank of the surface depression (ApRES_se), within the channel at the lowest surface depression (ApRES_low), at the western steepest flank (ApRES_sw) and west outside the channel (ApRES_we). All four ApRES operated for 9 to 13 days with a measuring interval of 15 minutes. The long-period ApRES (ApRES_oe_long) operated east outside the channel for 361 days with a measuring interval of 2 hours. The short-period ApRES were operated parallel to GPS stations (see doi:10.1594/PANGAEA.932441).
These Lagrangian measurements allow the estimation of basal melt rates based on estimated vertical displacements of englacial and basal reflections. The ApRES is an autonomous operating frequency-modulated continuous wave (FMCW) radar that transmits a tone sweep – called chirp – ranging from 200 to 400 MHz over a period of one second. In order to improve the signal-to-noise ratio, 100 chirps were transmitted within a single measurement. These measurements were repeated every 24 hours. Background of the ApRES-system is published by Brennan et al. (2014) and Nicholls et al. (2015).
The processing of the data is described in Stewart (2018), Stewart et al. (2019) and Vankova et al. (2020).
Related to:
Brennan, Paul V; Lok, Lai Bun; Nicholls, Keith W; Corr, Hugh F J (2014): Phase‐sensitive FMCW radar system for high‐precision Antarctic ice shelf profile monitoring. IET Radar, Sonar & Navigation, 8(7), 776-786, https://doi.org/10.1049/iet-rsn.2013.0053
Nicholls, Keith W; Corr, Hugh F J; Stewart, Craig L; Lok, Lai Bun; Brennan, Paul V; Vaughan, David G (2015): A ground-based radar for measuring vertical strain rates and time-varying basal melt rates in ice sheets and shelves. Journal of Glaciology, 61(230), 1079-1087, https://doi.org/10.3189/2015JoG15J073
Stewart, Craig L (2018): Ice-ocean interactions beneath the north-western Ross Ice Shelf, Antarctica. Apollo-University Of Cambridge Repository, https://doi.org/10.17863/CAM.21483
Stewart, Craig L; Christoffersen, Poul; Nicholls, Keith W; Williams, Michael J M; Dowdeswell, Julian A (2019): Basal melting of Ross Ice Shelf from solar heat absorption in an ice-front polynya. Nature Geoscience, 12, 435-440, https://doi.org/10.1038/s41561-019-0356-0
Vankova, Irena; Nicholls, Keith W; Corr, Hugh F J; Makinson, Keith; Brennan, Paul V (2020): Observations of Tidal Melt and Vertical Strain at the Filchner‐Ronne Ice Shelf, Antarctica. Journal of Geophysical Research-Earth Surface, 125(1), https://doi.org/10.1029/2019JF005280
Zeising, Ole; Helm, Veit; Steinhage, Daniel; Humbert, Angelika (2021): GNSS measurements at a basal melt channel of the southern Filchner Ice Shelf, Antarctica. PANGAEA, https://doi.org/10.1594/PANGAEA.932441
Project(s):
Filchner Ice Shelf Project (FISP)
Coverage:
Median Latitude: -82.373050 * Median Longitude: -45.776600 * South-bound Latitude: -82.375400 * West-bound Longitude: -45.921000 * North-bound Latitude: -82.370200 * East-bound Longitude: -45.662900
Date/Time Start: 2016-12-27T14:04:00 * Date/Time End: 2018-01-06T20:11:00
Event(s):
ANT-Land_2016/17_FISP_ApRES_low (ApRES_low) * Latitude: -82.372300 * Longitude: -45.812400 * Date/Time Start: 2016-12-28T20:20:00 * Date/Time End: 2017-01-07T12:32:00 * Campaign: ANT-Land_2016/17_FISP * Basis: AWI Antarctic Land Expedition * Method/Device: Autonomous phase-sensitive radio-echo sounder (ApRES)
ANT-Land_2016/17_FISP_ApRES_oe (ApRES_oe) * Latitude: -82.375400 * Longitude: -45.662900 * Date/Time Start: 2016-12-27T19:36:00 * Date/Time End: 2017-01-09T17:19:00 * Campaign: ANT-Land_2016/17_FISP * Basis: AWI Antarctic Land Expedition * Method/Device: Autonomous phase-sensitive radio-echo sounder (ApRES)
ANT-Land_2016/17_FISP_ApRES_ow (ApRES_ow) * Latitude: -82.370200 * Longitude: -45.921000 * Date/Time Start: 2016-12-27T14:04:00 * Date/Time End: 2017-01-09T12:01:00 * Campaign: ANT-Land_2016/17_FISP * Basis: AWI Antarctic Land Expedition * Method/Device: Autonomous phase-sensitive radio-echo sounder (ApRES)
Comment:
Data were measured in the field by Daniel Steinhage. This dataset has been planned by Angelika Humbert as part of FISP. If you have questions, please contact Ole Zeising (ole.zeising@awi.de) or co-authors.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Zeising, Ole | |||
| 2 | Date/Time of event | Date/Time | Zeising, Ole | |||
| 3 | Date/Time of event 2 | Date/Time 2 | Zeising, Ole | |||
| 4 | Latitude of event | Latitude | Zeising, Ole | |||
| 5 | Longitude of event | Longitude | Zeising, Ole | |||
| 6 | Binary Object | Binary | Zeising, Ole | Autonomous phase-sensitive radio-echo sounder (ApRES) | ||
| 7 | Binary Object (File Size) | Binary (Size) | Bytes | Zeising, Ole | Autonomous phase-sensitive radio-echo sounder (ApRES) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
6 data points
Data
All files referred to in data matrix can be downloaded in one go as ZIP or TAR. Be careful: This download can be very large! To protect our systems from misuse, we require to sign up for an user account before downloading.
| 1 Event | 2 Date/Time | 3 Date/Time 2 | 4 Latitude | 5 Longitude | 6 Binary | 7 Binary (Size) [Bytes] |
|---|---|---|---|---|---|---|
| ANT-Land_2016/17_FISP_ApRES_low | 2016-12-28T20:20 | 2017-01-07T12:32 | -82.3723 | -45.8124 | ApRES_low.zip | 6 GBytes |
| ANT-Land_2016/17_FISP_ApRES_oe | 2016-12-27T19:36 | 2017-01-09T17:19 | -82.3754 | -45.6629 | ApRES_oe.zip | 3.5 GBytes |
| ANT-Land_2017_FISP_ApRES_oe_long | 2017-01-10T14:37 | 2018-01-06T20:11 | -82.3754 | -45.6629 | ApRES_oe_long.zip | 4 GBytes |
| ANT-Land_2016/17_FISP_ApRES_ow | 2016-12-27T14:04 | 2017-01-09T12:01 | -82.3702 | -45.9210 | ApRES_ow.zip | 8.4 GBytes |
| ANT-Land_2016/17_FISP_ApRES_se | 2016-12-27T21:00 | 2017-01-05T17:20 | -82.3733 | -45.7511 | ApRES_se.zip | 3.2 GBytes |
| ANT-Land_2016/17_FISP_ApRES_sw | 2016-12-27T16:21 | 2017-01-09T12:50 | -82.3717 | -45.8493 | ApRES_sw.zip | 6.8 GBytes |