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Numerical modelling of snow and ice thicknesses in Lake Vanajavesi, Finland

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Author(s): Yu Yang | Matti Leppäranta | Bin Cheng | Zhijun Li

Journal: Tellus A
ISSN 0280-6495

Volume: 64;
Start page: 1;
Date: 2012;
Original page

Keywords: thermodynamic model | sensitivity tests | snow | ice | Lake Vanajavesi

ABSTRACT
Snow and ice thermodynamics was simulated applying a one-dimensional model for an individual ice season 2008–2009 and for the climatological normal period 1971–2000. Meteorological data were used as the model input. The novel model features were advanced treatment of superimposed ice and turbulent heat fluxes, coupling of snow and ice layers and snow modelled from precipitation. The simulated snow, snow–ice and ice thickness showed good agreement with observations for 2008–2009. Modelled ice climatology was also reasonable, with 0.5 cm d−1 growth in December–March and 2 cm d−1 melting in April. Tuned heat flux from water to ice was 0.5 W m−2. The diurnal weather cycle gave significant impact on ice thickness in spring. Ice climatology was highly sensitive to snow conditions. Surface temperature showed strong dependency on thickness of thin ice (
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