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The Influence of European Climate Variability Mechanism on Air Temperatures in Romania

机译:欧洲气候变化机制对罗马尼亚气温的影响

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The present paper investigates on the spatial and temporal variability of maximum and minimum air-temperatures in Romania and their connection to the European climate variability. The European climate variability is expressed by large scale parameters, which are roughly represented by the geopotential height at 500 hPa (H500) and air temperature at 850 hPa (T850). The Romanian data are represented by the time series at 22 weather stations, evenly distributed over the entire country’s territory. The period that was taken into account was 1961-2010, for the summer and winter seasons. The method of empirical orthogonal functions (EOF) has been used, in order to analyze the connection between the temperature variability in Romania and the same variability at a larger scale, by taking into consideration the atmosphere circulation. The time series associated to the first two EOF patterns of local temperatures and large-scale anomalies were considered with regard to trends and shifts in their mean values. The non- Mann-Kendall and Pettitt parametric tests were used in this respect. The results showed a strong correlation between T850 parameter and minimum and maximum air temperatures in Romania. Also, the ample variance expressed by the first EOF configurations suggests a connection between local and large scale climate variability.
机译:本文研究了罗马尼亚最高和最低气温的时空变化及其与欧洲气候变化的联系。欧洲的气候变异性由大型参数表示,这些参数大致由500 hPa(H500)的地势高度和850 hPa(T850)的气温表示。罗马尼亚的数据以22个气象站的时间序列表示,并在全国范围内平均分布。考虑的时期是1961-2010年(夏季和冬季)。为了通过考虑大气环流来分析罗马尼亚的温度变化与较大范围内的相同变化之间的联系,使用了经验正交函数(EOF)方法。考虑到其平均值的趋势和变化,考虑了与局部温度和大规模异常的前两个EOF模式相关的时间序列。在这方面,使用了非Mann-Kendall和Pettitt参数测试。结果表明,T850参数与罗马尼亚的最低和最高气温之间有很强的相关性。同样,第一个EOF配置所表达的大量变化表明局部气候变化和大规模气候变化之间存在联系。

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