Preprints
https://doi.org/10.5194/egusphere-2022-674
https://doi.org/10.5194/egusphere-2022-674
 
16 Aug 2022
16 Aug 2022
Status: this preprint is open for discussion.

Glacier Energy and Mass Balance (GEMB v1.0): A model of firn processes for cryosphere research

Alex Gardner, Nicole-Jeanne Schlegel, and Eric Larour Alex Gardner et al.
  • Jet Propulsion Laboratory, California Institute of Technology, Pasadena, 91109, United States of America

Abstract. This paper provides the first description of version 1.0 of the open-source Glacier Energy and Mass Balance model. GEMB models the ice sheet and glacier surface-atmospheric energy and mass exchange, and firn state. It is a column model (no horizontal communication) of intermediate complexity that includes those processes deemed most relevant to glacier studies with the goal of retaining computational efficiency that can accommodate the very long (thousands of years) spin-ups necessary for initializing deep firn columns and for running sensitivity experiments to characterize model uncertainty on continental scales. The model is one-way coupled with the atmosphere which allows the model to be run off-line with a diversity of climate forcing but neglects feedback to the atmosphere. GEMB provides numerous parameterization choices for various key processes (e.g. albedo, subsurface shortwave absorption, and compaction), making it well suited for uncertainty quantification and model exploration. The model is evaluated against the current state-of-the-art and in situ observations and is shown to perform well.

Alex Gardner et al.

Status: open (until 14 Oct 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2022-674', Juan Antonio Añel, 24 Aug 2022 reply
  • CEC1: 'Comment on egusphere-2022-674', Juan Antonio Añel, 24 Aug 2022 reply
    • AC1: 'Reply on CEC1', Alex Gardner, 24 Aug 2022 reply
      • AC2: 'Reply on AC1', Alex Gardner, 24 Aug 2022 reply
        • CEC2: 'Reply on AC2', Juan Antonio Añel, 24 Aug 2022 reply
          • EC1: 'Reply on CEC2', Andrew Wickert, 25 Aug 2022 reply
            • CC2: 'Reply on EC1', Nicole-Jeanne Schlegel, 26 Aug 2022 reply
              • CEC3: 'Reply on CC2', Juan Antonio Añel, 26 Aug 2022 reply
                • AC3: 'Reply on CEC3', Alex Gardner, 26 Aug 2022 reply
                  • CC3: 'Reply on AC3', Nicole-Jeanne Schlegel, 26 Aug 2022 reply
                    • CEC4: 'Reply on CC3', Juan Antonio Añel, 29 Aug 2022 reply
                      • AC4: 'Reply on CEC4', Alex Gardner, 29 Aug 2022 reply
                • EC2: 'Reply on CEC3', Andrew Wickert, 29 Aug 2022 reply

Alex Gardner et al.

Alex Gardner et al.

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Short summary
This paper provides the first description of version 1.0 of the open-source Glacier Energy and Mass Balance model. GEMB models the ice sheet and glacier surface-atmospheric energy and mass exchange, and firn state. The model is evaluated against the current state-of-the-art and in situ observations and is shown to perform well.