Preprints
https://doi.org/10.5194/tc-2022-144
https://doi.org/10.5194/tc-2022-144
 
21 Jul 2022
21 Jul 2022
Status: this preprint is currently under review for the journal TC.

Drainage and refill of an Antarctic Peninsula subglacial lake reveals an active subglacial hydrological network

Dominic A. Hodgson, Tom A. Jordan, Teal R. Riley, and Peter T. Fretwell Dominic A. Hodgson et al.
  • British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK

Abstract. The role of subglacial hydrological networks and subglacial lakes in modulating ice dynamics under the East and West Antarctic Ice Sheets is now relatively well understood. In contrast, little is known about subglacial water bodies under the Antarctic Peninsula Ice Sheet and how these are influencing glacier behaviour. Here we describe the rapid drainage and slow refill of a subglacial lake under Mars Glacier using remote sensing and aerogeophysics platforms. Results suggest drainage of the subglacial lake occurred prior to 2013, resulting in collapse of the overlying ice into the newly formed subglacial cavity. The lake has been refiling since this time, with peak rates of infilling associated with seasonal meltwater activity. We review evidence for similar features elsewhere in the Antarctic Peninsula and discuss whether their appearance marks a threshold shift in the thermal regime of the region’s glaciers and the activation of their subglacial hydrological networks. Collectively, these features show coupling of surface climate processes and the bed and may help explain the strong seasonality seen in glacier flow rates during the annual melt season and the ongoing regional decline in ice mass.

Dominic A. Hodgson et al.

Status: open (until 15 Sep 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Dominic A. Hodgson et al.

Data sets

Drainage and refill of an Antarctic Peninsula subglacial lake reveals an active subglacial hydrological network Dominic A Hodgson, Tom A Jordan, Teal R Riley, and Peter T Fretwell http://www.bas.ac.uk/data/uk-pdc/

Dominic A. Hodgson et al.

Viewed

Total article views: 325 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
211 101 13 325 1 4
  • HTML: 211
  • PDF: 101
  • XML: 13
  • Total: 325
  • BibTeX: 1
  • EndNote: 4
Views and downloads (calculated since 21 Jul 2022)
Cumulative views and downloads (calculated since 21 Jul 2022)

Viewed (geographical distribution)

Total article views: 315 (including HTML, PDF, and XML) Thereof 315 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 08 Aug 2022
Download
Short summary
This paper describes the drainage (and refill) of a subglacial lake on the Antarctic Peninsula resulting in collapse of the overlying ice into the newly formed subglacial cavity. It provides evidence of an active hydrological network under the region's glaciers and close coupling between surface climate processes and the base of the ice.