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

Journal metrics

IF value: 4.713
IF4.713
IF 5-year value: 4.927
IF 5-year
4.927
CiteScore value: 8.0
CiteScore
8.0
SNIP value: 1.425
SNIP1.425
IPP value: 4.65
IPP4.65
SJR value: 2.353
SJR2.353
Scimago H <br class='widget-line-break'>index value: 71
Scimago H
index
71
h5-index value: 53
h5-index53
Preprints
https://doi.org/10.5194/tc-2019-230
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-2019-230
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

  07 Oct 2019

07 Oct 2019

Review status
This preprint has been withdrawn by the authors.

Projecting Circum-Arctic Excess Ground Ice Melt with a sub-grid representation in the Community Land Model

Lei Cai1, Hanna Lee1, Sebastian Westermann2, and Kjetil Schanke Aas2 Lei Cai et al.
  • 1NORCE Norwegian Research Centre, Bjerknes Centre for Climate Research, 5008, Bergen, Norway
  • 2Department of Geosciences, University of Oslo, Oslo, 0315, Norway

Abstract. We implement a sub-grid representation of excess ground ice within permafrost soils and its melting using the latest version of Community Land Model (CLM5). Based on the original CLM5 tiling hierarchy, we duplicate the natural vegetated landunit by building extra tiles for up to three different excess ice conditions in each grid point. Single-grid simulation cases initialize the same amount of excess ice in same soil layers, while prescribing different volumetric ice contents and sub-grid distributions. For the same total amount of excess ice initialized at the same soil layers, different sub-grid variability of excess ice leads to different excess ice melting rates on the grid level, as well as to different impacts to permafrost thermal properties and local hydrology. We prescribed a tiling scheme based on the dataset “Circum-Arctic Map of Permafrost and Ground-Ice Conditions” (Brown et al., 2002) within horizontal and vertical distributions of three different types of excess ice in the CLM grid to test applicability of sub-grid representation. Compared to the excess ice initialized homogeneously in each grid, the sub-grid scale excess ice and the tiling scheme amend the overly early timing of initial melting and the overly high melting rate of excess ice in warming climate. Initializing the excess ice depths according to local active layer thickness reduces underestimation of excess ice melt for the Arctic coastal regions. Further developments rely on additional global observational datasets on both the spatial and vertical distributions of excess ground ice, where our development of sub-grid representation demonstrated the potential for more realistically projecting excess ice melt in the circum-Arctic domain.

This preprint has been withdrawn.

Lei Cai et al.

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Lei Cai et al.

Lei Cai et al.

Viewed

Total article views: 668 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
475 150 43 668 40 39
  • HTML: 475
  • PDF: 150
  • XML: 43
  • Total: 668
  • BibTeX: 40
  • EndNote: 39
Views and downloads (calculated since 07 Oct 2019)
Cumulative views and downloads (calculated since 07 Oct 2019)

Viewed (geographical distribution)

Total article views: 532 (including HTML, PDF, and XML) Thereof 530 with geography defined and 2 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 27 Sep 2020
Publications Copernicus
Download
Withdrawal notice

This preprint has been withdrawn.

Short summary
We develop a sub-grid representation of excess ground ice in the Community Land Model (CLM) by adding three landunits to the original CLM sub-grid hierarchy, in order to prescribe three different excess ice conditions in one grid cell. Single-grid simulations verify the potential of the model development on better projecting excess ice melt in a warming climate. Global simulations recommend the proper way of applying the model development with the existing excess ice dataset.
We develop a sub-grid representation of excess ground ice in the Community Land Model (CLM) by...
Citation