Snow cover variability in Lithuania over the last 50 years and its relationship with large-scale atmospheric circulation
Snow cover variability in Lithuania over the last 50 years and its relationship with large-scale atmospheric circulation
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发表时间：
2014
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通讯作者：
E. Rimkus;J. Kažys;Sigita Butkutė;Indrė Gečaitė
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作者：
E. Rimkus;J. Kažys;Sigita Butkutė;Indrė Gečaitė
本文分析了1961年至2010年立陶宛的积雪动态。评估了积雪参数的空间分布，以及季节内的变化和长期变化。比较了野外测雪结果和森林测雪结果。Hess-Brezowski环流形式分类用于将立陶宛的大雪积聚或消融事件与天气形势联系起来。还研究了积雪日数的长期变化及其与大尺度大气环流型(AO和NAO)的关系。在研究期间，立陶宛全境范围内积雪天数的减少是确定的。同时，最大积雪深度的变化也不是那么明确。研究结果还表明，大尺度大气模式对积雪状况有很大影响。
In this study, the snow cover dynamics in Lithuania from 1961 to 2010 is analyzed. The spatial distribution of snow cover parameters, as well as intra-seasonal variability and long-term changes are evaluated. Snow survey results in the open field and the forest are compared. The Hess-Brezowski circulation form classification is used to link heavy snow cover accumulation or ablation events in Lithuania with the synoptic situations. The longterm variability of the number of days with snow cover and its connection with large-scale atmospheric circulation patterns (AO and NAO) is also investigated. The decrease in the number of days with snow cover during the study period is determined throughout the whole territory of Lithuania. Meanwhile, changes in the maximum snow depth are not so unambiguous. The study results also show that large-scale atmospheric patterns strongly influence the snow cover regime.