期刊
POLAR RESEARCH
卷 34, 期 -, 页码 -出版社
OPEN ACADEMIA AB
DOI: 10.3402/polar.v34.20828
关键词
Snow ice; superimposed ice; thermodynamic modelling; landfast sea ice; Kongsfjorden
资金
- Research Council of Norway [178246/S30, 193592]
- Academy of Finland [259537]
- NPI and its Centre for Ice, Climate and Ecosystems through the projects ICE-Fluxes and Svalbard Fast Ice Monitoring
- Fram Centre Arctic Ocean flagship programme through the project Developing Modelling Tools to Understand the Role of Solar Radiation to Sea Ice Mass Balance in a Seasonally Ice-Covered Arctic
Snow ice and superimposed ice formation on landfast sea ice in a Svalbard fjord, Kongsfjorden, was investigated with a high-resolution thermodynamic snow and sea-ice model, applying meteorological weather station data as external forcing. The model shows that sea-ice formation occurs both at the ice bottom and at the snow/ice interface. Modelling results indicated that the total snow ice and superimposed ice, which formed at the snow/ice interface, was about 14 cm during the simulation period, accounting for about 15% of the total ice mass and 35% of the total ice growth. Introducing a time-dependent snow density improved the modelled results, and a time-dependent oceanic heat flux parameterization yielded reasonable ice growth at the ice bottom. Model results suggest that weather conditions, in particular air temperature and precipitation, as well as snow thermal properties and surface albedo are the most critical factors for the development of snow ice and superimposed ice in Kongsfjorden. While both warming air and higher precipitation led to increased snow ice and superimposed ice forming in Kongsfjorden in the model runs, the processes were more sensitive to precipitation than to air temperature.
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