Ice regime dynamics in the Nemunas River, Lithuania

被引:17
作者
Stonevicius, E. [1 ]
Stankunavicus, G. [1 ]
Kilkus, K. [1 ]
机构
[1] Vilnius Univ, Dept Hydrol & Climatol, LT-03101 Vilnius, Lithuania
关键词
river ice cover; freeze up; break up; atmospheric forcing;
D O I
10.3354/cr00707
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Ice cover persistence in the lower reaches of the Nemunas River has decreased during the last 150 yr. The variation in the river freeze- and break-up dates is related to climatic variables. The significance of the negative break-up trend exceeds that of the positive freeze-up trend. Low-frequency large-scale atmospheric circulation patterns such as the North Atlantic Oscillation and Arctic Oscillation (NAO/AO) appear to have more influence on the break-up date than on the freeze-up date. Different classification methods applied to the atmospheric patterns prevailing in the early freeze-up events reveal similar results; however, differences arising between classifications are attributable to non-persistent and high frequency patterns.
引用
收藏
页码:17 / 28
页数:12
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