Abstract

Using the data from weather observation stations, an assessment of statistical significance of the first harmonic amplitude of the long-term average daily precipitation series in Russia in 1961‒2020 and their changes in 1991‒2020 compared to 1961‒1990 is made. It is shown that at most stations the first harmonic has a reliable value different from the noise, except for eleven stations in the southern regions of the European part of Russia. It is revealed that on average there is a significant decrease in the first harmonic amplitudes of the daily precipitation series across Russia. An analysis of the spatial distribution of the studied quantities is performed and the presence of large areas with their homogeneous character is demonstrated.

中文翻译：

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俄罗斯境内日降水量序列一次谐波幅值观测变化研究

摘要

利用气象观测站数据，对1961-2020年俄罗斯长期平均日降水量序列一次谐波振幅及其1991-2020年与1961-1990年相比的变化进行了统计显着性评估。结果表明，除俄罗斯欧洲部分南部地区的 11 个站点外，大多数站点的一次谐波具有不同于噪声的可靠值。结果表明，俄罗斯各地日降水序列的一次谐波振幅平均显着下降。对所研究数量的空间分布进行了分析，并证明了具有均匀特征的大区域的存在。