Preprints
https://doi.org/10.5194/egusphere-2022-334
https://doi.org/10.5194/egusphere-2022-334
 
16 Jun 2022
16 Jun 2022

Effects of topographic and meteorological parameters on the surface area loss of ice aprons in the Mont Blanc massif (European Alps)

Suvrat Kaushik1,2, Ludovic Ravanel1,3, Florence Magnin1, Yajing Yan2, Emmanuel Trouve2, and Diego Cusicanqui4 Suvrat Kaushik et al.
  • 1EDYTEM, Univ. Savoie Mont-Blanc, Univ. Grenoble Alpes, CNRS, 73000 Chambéry, France
  • 2LISTIC, Univ. Savoie Mont Blanc, Polytech, F-74944 Annecy-le-Vieux, France
  • 3Department of Geosciences, University of Oslo, Sem Sælands vei 1, 0371 Oslo, Norway
  • 4IGE, Univ. Grenoble Alpes - CNRS, F-38000 Grenoble, France

Abstract. Ice aprons (IAs) are part of the critical components of the Alpine cryosphere. As a result of the changing climate over the past few decades, deglaciation has resulted in a surface decrease of IAs, which has not yet been documented out of a few specific examples. In this study, we quantify the effects of climate change on IAs since the mid-20th Century in the Mont-Blanc massif (western European Alps). We then evaluate the role of climate forcing parameters and the local topography in the behaviour of IAs. For this, we precisely mapped the surface areas of 200 IAs using high-resolution aerial and satellite photographs from 1952, 2001, 2012 and 2019. From the latter inventory, the surface area of the present individual IAs ranges from 0.001 to 0.04 km2. IAs have lost their surface area over the past 70 years, with an alarming increase since the early 2000s. The total area, from 7.93 km2 in 1952, was reduced to 5.91 km2 in 2001 (-25.5 %) before collapsing to 4.21 km2 in 2019 (-47 % since 1952). We performed a regression analysis using temperature and precipitation proxies to understand better the effects of climate forcing parameters on IA surface area variations. We found a strong correlation between both proxies and the relative area loss of IAs, indicating the significant influence of the changing climate on the evolution of IAs. We also evaluated the role of the local topographic factors in the IAs area loss. At a regional scale, factors like direct solar radiation and elevation have an important influence on the behaviour of IAs, while others like curvature, slope, and size of the IAs seem to be rather important on a local scale.

Journal article(s) based on this preprint

12 Oct 2022
Effects of topographic and meteorological parameters on the surface area loss of ice aprons in the Mont Blanc massif (European Alps)
Suvrat Kaushik, Ludovic Ravanel, Florence Magnin, Yajing Yan, Emmanuel Trouve, and Diego Cusicanqui
The Cryosphere, 16, 4251–4271, https://doi.org/10.5194/tc-16-4251-2022,https://doi.org/10.5194/tc-16-4251-2022, 2022
Short summary

Suvrat Kaushik et al.

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-334', Anonymous Referee #1, 23 Jul 2022
    • AC1: 'Reply on RC1', Suvrat Kaushik, 03 Sep 2022
  • RC2: 'Comment on egusphere-2022-334', Anonymous Referee #2, 24 Aug 2022
    • AC2: 'Reply on RC2', Suvrat Kaushik, 03 Sep 2022

Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-334', Anonymous Referee #1, 23 Jul 2022
    • AC1: 'Reply on RC1', Suvrat Kaushik, 03 Sep 2022
  • RC2: 'Comment on egusphere-2022-334', Anonymous Referee #2, 24 Aug 2022
    • AC2: 'Reply on RC2', Suvrat Kaushik, 03 Sep 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to revisions (further review by editor and referees) (12 Sep 2022) by Caroline Clason
AR by Suvrat Kaushik on behalf of the Authors (15 Sep 2022)  Author's response    Author's tracked changes    Manuscript
ED: Referee Nomination & Report Request started (16 Sep 2022) by Caroline Clason
RR by Anonymous Referee #1 (21 Sep 2022)
ED: Publish subject to technical corrections (26 Sep 2022) by Caroline Clason

Journal article(s) based on this preprint

12 Oct 2022
Effects of topographic and meteorological parameters on the surface area loss of ice aprons in the Mont Blanc massif (European Alps)
Suvrat Kaushik, Ludovic Ravanel, Florence Magnin, Yajing Yan, Emmanuel Trouve, and Diego Cusicanqui
The Cryosphere, 16, 4251–4271, https://doi.org/10.5194/tc-16-4251-2022,https://doi.org/10.5194/tc-16-4251-2022, 2022
Short summary

Suvrat Kaushik et al.

Suvrat Kaushik et al.

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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
Climate change impacts all parts of the cryosphere, but most importantly, the smaller ice bodies like Ice Aprons (IAs). This study is the first attempt on a regional scale to assess the impacts of the changing climate on these small but very important ice bodies. Our study shows that IAs have consistently lost mass over the past decades. The effects of climate variables, particularly temperature and precipitation and topographic factors, were analysed on the loss of IAs area.