欧洲东南部极端温度期间的天气环流型
Synoptic circulation patterns during temperature extremes in southeastern Europe
摘要：
本研究探讨与东南欧极端温度相关的天气环流模式。使用ERA-Interim再分析数据，我们报告的典型模式，特点的中上部对流层流动前几天和在炎热和寒冷的极端。分析是分别为每个季节，而短暂的和持久的极端之间的进一步区分揭示了相关的流通，推断的时空演变的罗斯贝波包（RWP）的差异和相似之处。最后，ECMWF确定性预报的性能进行了评估，在冬季和夏季持续的冷和热极端分别。总的来说，这项工作表明，RWP演变的正确表示是至关重要的，在确定东南欧极端温度的幅度和持久性。
英文摘要：
This study investigates the synoptic circulation patterns associated with temperature extremes in southeastern (SE) Europe. Using ERA-Interim reanalysis data we report on the typical patterns that characterize the middle and upper tropospheric flow a few days before and during hot and cold extremes. The analysis is done separately for each season, while a further distinction between short-lived and persistent extremes reveals differences and similarities in the associated circulation, as inferred by the spatiotemporal evolution of Rossby wave packets (RWPs). Finally, the performance of ECMWF deterministic forecasts is evaluated for persistent cold and hot extremes during winter and summer respectively. Overall, this work suggests that a correct representation of the RWP evolution is crucial in determining the magnitude and persistence of temperature extremes in SE Europe.
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