Application of a simple model for ice growth to the Lake St. Moritz, Switzerland

We present a Simple Lake Ice Model to calculate the growth rate of lake ice in a cold and relatively dry climate. The focus is on Lake St. Moritz, Switzerland, which has an area of 0.78 km2 and is about 45 m deep. In winter the lake is extensively used for recreational purposes, including horse raci...

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Main Authors: Johannes Oerlemans, Felix Keller
Format: Article
Language:English
Published: Cambridge University Press 2023-08-01
Series:Journal of Glaciology
Subjects:
Online Access:https://www.cambridge.org/core/product/identifier/S0022143022001101/type/journal_article
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author Johannes Oerlemans
Felix Keller
author_facet Johannes Oerlemans
Felix Keller
author_sort Johannes Oerlemans
collection DOAJ
description We present a Simple Lake Ice Model to calculate the growth rate of lake ice in a cold and relatively dry climate. The focus is on Lake St. Moritz, Switzerland, which has an area of 0.78 km2 and is about 45 m deep. In winter the lake is extensively used for recreational purposes, including horse racing with thousands of spectators. Safety on the ice cover is essential, and there is a great need to have a simple tool with which the growth rate of the ice layer can be calculated for given meteorological conditions. The approach is based on a simple formulation of the upper temperature of the ice layer, which depends on air temperature and snow cover. Input data are the date on which the lake freezes over, daily mean air temperatures and snow depth. For the winter 2021/22 calculated ice growth compares well with ice thickness measurements. We demonstrate that grooming of the snow has a significant positive effect on the ice thickening rate. We also evaluate the sensitivity of the simulated ice thickness to increasing mean temperature.
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spelling doaj.art-5536b0256c6b43e2928ff36858229a302023-07-28T10:47:45ZengCambridge University PressJournal of Glaciology0022-14301727-56522023-08-01691085109010.1017/jog.2022.110Application of a simple model for ice growth to the Lake St. Moritz, SwitzerlandJohannes Oerlemans0https://orcid.org/0000-0001-5701-4161Felix Keller1Institute for Marine and Atmospheric Research, Utrecht University, Utrecht, The Netherlands Centre for Applied Glaciology, Academia Engiadina, Samedan, SwitzerlandCentre for Applied Glaciology, Academia Engiadina, Samedan, Switzerland Department of Environmental System Science, ETH, Zürich, SwitzerlandWe present a Simple Lake Ice Model to calculate the growth rate of lake ice in a cold and relatively dry climate. The focus is on Lake St. Moritz, Switzerland, which has an area of 0.78 km2 and is about 45 m deep. In winter the lake is extensively used for recreational purposes, including horse racing with thousands of spectators. Safety on the ice cover is essential, and there is a great need to have a simple tool with which the growth rate of the ice layer can be calculated for given meteorological conditions. The approach is based on a simple formulation of the upper temperature of the ice layer, which depends on air temperature and snow cover. Input data are the date on which the lake freezes over, daily mean air temperatures and snow depth. For the winter 2021/22 calculated ice growth compares well with ice thickness measurements. We demonstrate that grooming of the snow has a significant positive effect on the ice thickening rate. We also evaluate the sensitivity of the simulated ice thickness to increasing mean temperature.https://www.cambridge.org/core/product/identifier/S0022143022001101/type/journal_articleIce/atmosphere interactionslake icesnow/ice surface processes
spellingShingle Johannes Oerlemans
Felix Keller
Application of a simple model for ice growth to the Lake St. Moritz, Switzerland
Journal of Glaciology
Ice/atmosphere interactions
lake ice
snow/ice surface processes
title Application of a simple model for ice growth to the Lake St. Moritz, Switzerland
title_full Application of a simple model for ice growth to the Lake St. Moritz, Switzerland
title_fullStr Application of a simple model for ice growth to the Lake St. Moritz, Switzerland
title_full_unstemmed Application of a simple model for ice growth to the Lake St. Moritz, Switzerland
title_short Application of a simple model for ice growth to the Lake St. Moritz, Switzerland
title_sort application of a simple model for ice growth to the lake st moritz switzerland
topic Ice/atmosphere interactions
lake ice
snow/ice surface processes
url https://www.cambridge.org/core/product/identifier/S0022143022001101/type/journal_article
work_keys_str_mv AT johannesoerlemans applicationofasimplemodelforicegrowthtothelakestmoritzswitzerland
AT felixkeller applicationofasimplemodelforicegrowthtothelakestmoritzswitzerland