Journal cover Journal topic
The Cryosphere An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 4.790 IF 4.790
  • IF 5-year value: 5.921 IF 5-year
    5.921
  • CiteScore value: 5.27 CiteScore
    5.27
  • SNIP value: 1.551 SNIP 1.551
  • IPP value: 5.08 IPP 5.08
  • SJR value: 3.016 SJR 3.016
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 63 Scimago H
    index 63
  • h5-index value: 51 h5-index 51
Discussion papers
https://doi.org/10.5194/tc-2019-251
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-2019-251
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 14 Nov 2019

Submitted as: research article | 14 Nov 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal The Cryosphere (TC).

Sensitivity of the Greenland mass and energy balance to uncertainties in key model parameters

Tobias Zolles1,2 and Andreas Born1,2 Tobias Zolles and Andreas Born
  • 1Department for Earth science, University of Bergen, Bergen, Norway
  • 2Bjerknes Centre for Climate Research, Bergen, Norway

Abstract. We investigate the sensitivity of a glacier surface mass and energy balance model using a variance based analysis, for two distinct periods of the last glacial cycle: present day climate and the Last Glacial Maximum (LGM). The results can be summarized in three major findings: The sensitivity towards individual model parameters and parameterizations is neither invariant in space nor in time. The model is most sensitive to uncertainty related to down-welling long-wave radiation. Turbulent latent heat flux has a sizable contribution to the surface mass balance uncertainty in central Greenland today and over the entire ice sheet during the cold climate of the LGM, in spite of its low impact on the overall surface mass balance of the Greenland ice sheet in modern climate. We conclude that quantifying the model sensitivity is very helpful for the subsequent tuning of free model parameters, because it clarifies the relative importance of individual parameters and highlights interactions between them that need to be considered.

Tobias Zolles and Andreas Born
Interactive discussion
Status: open (until 09 Jan 2020)
Status: open (until 09 Jan 2020)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Tobias Zolles and Andreas Born
Tobias Zolles and Andreas Born
Viewed  
Total article views: 239 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
176 61 2 239 1 1
  • HTML: 176
  • PDF: 61
  • XML: 2
  • Total: 239
  • BibTeX: 1
  • EndNote: 1
Views and downloads (calculated since 14 Nov 2019)
Cumulative views and downloads (calculated since 14 Nov 2019)
Viewed (geographical distribution)  
Total article views: 195 (including HTML, PDF, and XML) Thereof 192 with geography defined and 3 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 07 Dec 2019
Publications Copernicus
Download
Short summary
We investigate the sensitivity of a glacier surface mass and energy balance model of the Greenland ice-sheets for the cold period of the last glacial maximum as well as present day climate. The results show that the model sensitivity changes with climate. While for present day simulations inclusions of sublimation and hoar formation are of minor importance, they cannot be neglected during the LGM. To simulate the surface mass balance over long time scales a water vapour scheme is necessary.
We investigate the sensitivity of a glacier surface mass and energy balance model of the...
Citation