The Influence of Snow and Ice Albedo towards Improved Lake Ice Simulations
| Autor: | Sarah S. Ariano, Laura C. Brown, Alexis L. Robinson |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
0207 environmental engineering 02 engineering and technology snow Oceanography 01 natural sciences modelling arctic Temperate climate lcsh:Science 020701 environmental engineering Observation data Waste Management and Disposal 0105 earth and related environmental sciences Earth-Surface Processes Water Science and Technology lake ice Freshwater ice temperate region 15. Life on land Albedo Snow 6. Clean water Ice thickness Arctic 13. Climate action Lake ice lcsh:Q Physical geography observation data Geology albedo ice thickness |
| Zdroj: | Hydrology Volume 8 Issue 1 Hydrology, Vol 8, Iss 11, p 11 (2021) |
| ISSN: | 2306-5338 |
| DOI: | 10.3390/hydrology8010011 |
| Popis: | Lake ice models are a vital tool for studying the response of ice-covered lakes to changing climates throughout the world. The Canadian Lake Ice Model (CLIMo) is a one-dimensional freshwater ice cover model that simulates Arctic and sub-Arctic lake ice cover well. Modelling ice cover in temperate regions has presented challenges due to the differences in ice composition between northern and temperate region lake ice. This study presents a comparison of measured and modelled ice regimes, with a focus on refining CLIMo for temperate regions. The study sites include two temperate region lakes (MacDonald Lake and Clear Lake, Central Ontario) and two High Arctic lakes (Resolute Lake and Small Lake, Nunavut) where climate and ice cover information have been recorded over three seasons. The ice cover simulations were validated with a combination of time lapse imagery, field measurements of snow depth, snow density, ice thickness and albedo data, and historical ice records from the Canadian Ice Database (for Resolute Lake). Simulations of High Arctic lake ice cover show good agreement with previous studies for ice-on and ice-off dates (MAE 6 to 8 days). Unadjusted simulations for the temperate region lakes show good ice-on timing, but an under-representation of ice thickness, and earlier complete ice-off timing (~3 to 5 weeks). Field measurements were used to adjust the albedo values used in CLIMo, which resulted in improvements to both simulated ice thickness (~3 cm MAE compared to manual measurements), and ice-off timing, within 0 to 7 days (2 days MAE) of observations. These findings suggest regionally specific measurements of albedo can improve the accuracy of lake ice simulations, which further our knowledge of the response of temperate and High Arctic lake ice regimes to climate conditions. |
| Databáze: | OpenAIRE |
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