意大利1951-2000年地面温度记录的季节循环统计
Statistics of the seasonal cycle of the 1951-2000 surface temperature records in Italy
摘要：
我们提出了一个分析的季节循环的地面温度在意大利的记录，在过去的50年。我们考虑两个数据集，合成意大利北部和南部的地面温度场。这些数据集包括每日最高和最低温度的记录。我们计算的最佳估计的季节性周期的变量考虑通过采用循环图的技术。我们观察到，一般来说，最低温度周期滞后于最高温度周期，意大利南部温度记录的周期滞后于意大利北部相应的周期。所有的季节周期都大大落后于太阳周期。在所考虑的时间间隔内，季节性周期的幅度和相位没有显示出任何统计上显著的趋势。
英文摘要：
We present an analysis of seasonal cycle of the last 50 years of records of surface temperature in Italy. We consider two data sets which synthesize the surface temperature fields of Northern and Southern Italy. Such data sets consist of records of daily maximum and minimum temperature. We compute the best estimate of the seasonal cycle of the variables considered by adopting the cyclograms' technique. We observe that in general the minimum temperature cycle lags behind the maximum temperature cycle, and that the cycles of the Southern Italy temperatures records lag behind the corresponding cycles referring to Northern Italy. All seasonal cycles lag considerably behind the solar cycle. The amplitude and phase of the seasonal cycles do not show any statistically significant trend in the time interval considered.
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