Articles | Volume 13, issue 12
Research article
11 Dec 2019
Research article |  | 11 Dec 2019

Initialization of a global glacier model based on present-day glacier geometry and past climate information: an ensemble approach

Julia Eis, Fabien Maussion, and Ben Marzeion

Model code and software

OGGM/oggm: v1.1 Fabien Maussion, Timo Roth, Matthias Dusch, Beatriz Recinos, Anouk Vlug, Ben Marzeion, Johannes Landmann, Julia Eis, Sadie L. Bartholomew, Nicolas Champollion, Philipp Gregor, anton-ub, Schmitty Smith, and Moritz Oberrauch

Short summary
To provide estimates of past glacier mass changes, an adequate initial state is required. However, information about past glacier states at regional or global scales is largely incomplete. Our study presents a new way to initialize the Open Global Glacier Model from past climate information and present-day geometries. We show that even with perfectly known but incomplete boundary conditions, the problem of model initialization leads to nonunique solutions, and we propose an ensemble approach.