Articles | Volume 15, issue 11
The Cryosphere, 15, 5115–5132, 2021
The Cryosphere, 15, 5115–5132, 2021

Research article 12 Nov 2021

Research article | 12 Nov 2021

Supraglacial lake bathymetry automatically derived from ICESat-2 constraining lake depth estimates from multi-source satellite imagery

Rajashree Tri Datta and Bert Wouters

Data sets

ATLAS/ICESat-2 L2A Global Geolocated Photon Data, Version 4 [Indicate subset used] T. A. Neumann, A. Brenner, D. Hancock, J. Robbins, J. Saba, K. Harbeck, A. Gibbons, J. Lee, S. B. Luthcke, T. Rebold, et al.

Model code and software

Source code for the Watta algorithm, version 1 R. Datta and B. Wouters

Short summary
The ICESat-2 laser altimeter can detect the surface and bottom of a supraglacial lake. We introduce the Watta algorithm, automatically calculating lake surface, corrected bottom, and (sub-)surface ice at high resolution adapting to signal strength. ICESat-2 depths constrain full lake depths of 46 lakes over Jakobshavn glacier using multiple sources of imagery, including very high-resolution Planet imagery, used for the first time to extract supraglacial lake depths empirically using ICESat-2.