Citation:

PANGAEA.972023 (dataset in review)

Name: Time series of basal melt rates from autonomous phase-sensitive radar (ApRES) measurements at location EIS8 on Ekström Ice Shelf, Antarctica from November 2021 to December 2022
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Antarctica; ApRES; Basal melt rates; Ekström; ice shelf basal melting

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Abstract:

The dataset consists of derived melt rates from autonomous phase-sensitive radar (ApRES) measurements. The estimated basal melt rates are based on the analysis of firn densification, strain thinning, and the change in ice thickness from the determination of vertical displacements. The basal melt rates are averaged over 7 days (moving window). To represent the variability of the melt rate on sub-weekly timescales, we also calculated the 7 day standard deviation of the basal melt rates based on a 1 day moving window. The uncertainty of the basal melt rate is based on the uncertainty of the strain estimation and the determination of the ice thickness change. Data are exported in 4 hour intervals. A positive melt rate represents melting. Details on the processing are given in Zeising et al., (submitted to The Cryosphere).

Keyword(s):

Antarctica; ApRES; Basal melt rates; Ekström; ice shelf basal melting

Related to:

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

Zeising, Ole; Hattermann, Tore; Kaleschke, Lars; Berger, Sophie; Drews, Reinhard; Ershadi, M Reza; Fromm, Tanja; Pattyn, Frank; Steinhage, Daniel; Eisen, Olaf (submitted): Weakening of meltwater plume reduces basal melting in summer at Ekström Ice Shelf, Antarctica. The Cryosphere Discussions, https://doi.org/10.5194/egusphere-2024-2109

Funding:

Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. ANT-2021_MIMO-EIS: MIMO-EIS

Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven (AWI), grant/award no. AWI_ANT_8: Quasi-Long-Term Observatory Glaciology at Neumayer station

Coverage:

Latitude: -70.820000 * Longitude: -8.730000

Date/Time Start: 2021-11-26T19:22:00 * Date/Time End: 2022-12-31T07:22:00

Event(s):

EIS-8_ApRES_2022 * Latitude: -70.820000 * Longitude: -8.730000 * Date/Time Start: 2021-11-26T00:00:00 * Date/Time End: 2022-12-31T00:00:00 * O2A Registry URI: registry.o2a-data.de * Location: Ekström Ice Shelf * Campaign: (Monitoring Melt where Ice Meets Ocean) * Basis: NEUMAYER III * Method/Device: Autonomous phase-sensitive radio-echo sounder (ApRES)

Comment:

If you have questions, please contact Ole Zeising (ole.zeising@awi.de) or co-authors.

Data were measured in the field by: Noah Trumpik, Ina Wehner (2019/20 & 2020/21); Timo Dornhöfer, Lorenz Marten (2020/21 & 2021/22); Falk Oraschewski, Martin Petri, Maximilian Betz (2022/23); Hameed Moqadam, Fyntan Shaw (2023/24).

Data processing was done by Ole Zeising.

This dataset has been planned by Olaf Eisen as part of the MIMO-EIS Project.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DATE/TIME	Date/Time		Zeising, Ole		Geocode
2	Melt rate	Melt rate	m/a	Zeising, Ole	derived from autonomous phase-sensitive radar (ApRES) measurements
3	Melt rate, standard deviation	Melt rate std dev	±	Zeising, Ole	derived from autonomous phase-sensitive radar (ApRES) measurements

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

3198 data points

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