Preprints
https://doi.org/10.5194/egusphere-2024-489
https://doi.org/10.5194/egusphere-2024-489
27 Mar 2024
 | 27 Mar 2024

Seasonal Snow-Atmosphere Modeling: Let's do it

Dylan Reynolds, Louis Quéno, Michael Lehning, Mahdi Jafari, Justine Berg, Tobias Jonas, Michael Haugeneder, and Rebecca Mott

Abstract. Mountain snowpack forecasting relies on accurate mass and energy input information to the snowpack. For this reason, coupled snow-atmosphere models, which downscale input fields to the snow model using atmospheric physics, have been developed. These coupled models are often limited in the spatial and temporal extent of their use by computational constraints. In addressing this challenge, we introduce HICARsnow, an intermediate-complexity coupled snow-atmosphere model. HICARsnow couples two physics-based models of intermediate complexity to enable basin-scale snow and atmospheric modeling at seasonal time scales. To showcase the efficacy and capability of HICARsnow, we present results from its application to a high-elevation basin in the Swiss Alps. The simulated snow depth is compared throughout the snow season to aerial LiDAR data. The model shows reasonable agreement with observations from peak accumulation through late-season melt-out, representing areas of high snow accumulation due to redistribution processes, as well as melt patterns caused by interactions between radiation and topography. HICARsnow is also found to resolve preferential deposition, with model output suggesting that parameterizations of the process using surface wind fields only may be inappropriate under certain atmospheric conditions. The two-way coupled model also improves surface air temperatures over late-season snow, demonstrating added value for the atmospheric model as well. Differences between observations and model output during the accumulation season indicate a poor representation of redistribution processes away from exposed ridges and steep terrain, and a low-bias in albedo at high elevations during the ablation season. Overall, HICARsnow shows great promise for applications in operational snow forecasting and studying the representation of snow accumulation and ablation processes.

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Journal article(s) based on this preprint

19 Sep 2024
Seasonal snow–atmosphere modeling: let's do it
Dylan Reynolds, Louis Quéno, Michael Lehning, Mahdi Jafari, Justine Berg, Tobias Jonas, Michael Haugeneder, and Rebecca Mott
The Cryosphere, 18, 4315–4333, https://doi.org/10.5194/tc-18-4315-2024,https://doi.org/10.5194/tc-18-4315-2024, 2024
Short summary
Dylan Reynolds, Louis Quéno, Michael Lehning, Mahdi Jafari, Justine Berg, Tobias Jonas, Michael Haugeneder, and Rebecca Mott

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2024-489', Yang Yu, 23 Apr 2024
  • RC1: 'Comment on egusphere-2024-489', Manuel Tobias Blau, 11 May 2024
    • AC1: 'Reply on RC1', Dylan Reynolds, 30 May 2024
  • RC2: 'Comment on egusphere-2024-489', Anonymous Referee #2, 27 May 2024
    • AC2: 'Reply on RC2', Dylan Reynolds, 05 Jun 2024

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on egusphere-2024-489', Yang Yu, 23 Apr 2024
  • RC1: 'Comment on egusphere-2024-489', Manuel Tobias Blau, 11 May 2024
    • AC1: 'Reply on RC1', Dylan Reynolds, 30 May 2024
  • RC2: 'Comment on egusphere-2024-489', Anonymous Referee #2, 27 May 2024
    • AC2: 'Reply on RC2', Dylan Reynolds, 05 Jun 2024

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
ED: Publish subject to revisions (further review by editor and referees) (10 Jun 2024) by Masashi Niwano
AR by Dylan Reynolds on behalf of the Authors (15 Jun 2024)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (24 Jun 2024) by Masashi Niwano
AR by Dylan Reynolds on behalf of the Authors (24 Jun 2024)

Journal article(s) based on this preprint

19 Sep 2024
Seasonal snow–atmosphere modeling: let's do it
Dylan Reynolds, Louis Quéno, Michael Lehning, Mahdi Jafari, Justine Berg, Tobias Jonas, Michael Haugeneder, and Rebecca Mott
The Cryosphere, 18, 4315–4333, https://doi.org/10.5194/tc-18-4315-2024,https://doi.org/10.5194/tc-18-4315-2024, 2024
Short summary
Dylan Reynolds, Louis Quéno, Michael Lehning, Mahdi Jafari, Justine Berg, Tobias Jonas, Michael Haugeneder, and Rebecca Mott

Model code and software

HICARsnow Model Code Dylan Reynolds https://doi.org/10.5281/zenodo.10679464

Video supplement

Preferential Deposition Processes Dylan Reynolds https://doi.org/10.16904/envidat.482

Dylan Reynolds, Louis Quéno, Michael Lehning, Mahdi Jafari, Justine Berg, Tobias Jonas, Michael Haugeneder, and Rebecca Mott

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Short summary
Accurate information about atmospheric variables are needed to produce simulations of mountain snowpacks. Here we present a model which can represent processes that shape mountain snowpack, focusing on the accumulation of snow. Simulations show that this model can simulate the complex path that a snowflake takes towards the ground, and that this leads to differences in the distribution of snow by the end of the winter. Overall, this model shows promise to improve forecasts of snow in mountains.