(Accompanying data for Arthur et al. (submitted, The Cryosphere).
This repository contains:
(1) A GIS shapefile of seven active subglacial lake boundaries detected from ICESat-2 and ICESat anomalies and the Reference Elevation Model of Antarctica (REMA, Howat et al., 2019). Arthur et al. (submitted) provides full details of lake identification methods.
(2) Matlab scripts for processing and plotting ICESat-2 ATL11 Level 3B version 6 land ice height data and ICESat GLAH12 version 34 land ice height data used in this paper.
Lake naming convention follows the most proximal ice shelf: L1 = Lazarevisen; V1 = Vigridisen; M1 and M2 = Muninisen; R1, R2 and R3 = Roi Baudouin.
Boundaries of Lakes L1, R1 and R2 have been delineated based on differencing of 2-m resolution REMA DEM strips, and boundaries of Lakes V1, M1, M2 and R3 have been manually delineated based on ICESat-2 elevation anomaly locations together with the REMA mosaic hillshade.
GIS Shapefile attributes:
Lake area, distance from grounding line (MEaSUREs, Rignot et al., 2016), centre latitude, centre longitude, ice flow speed (Gardner et al., 2018), ice thickness (Fretwell et al., 2013; Morlighem et al., 2022), bed elevation (Morlighem et al., 2022), category (high-confidence/provisionally-active), dates of REMA DEM strips used to delineate lake boundary (where applicable).
This dataset is also available at the Norwegian Polar Data Centre: https://data.npolar.no/dataset/ab777130-2696-41e6-92dd-2ac09ed9e301 and Zenodo (https://zenodo.org/records/13640820).