ABSTRACT: For many decades, meteorological stations in the Czech Republic used the Campbell-Stokes (CS) sunshine recorder to measure sunshine duration. However, automatic devices have progressively replaced it since the mid-1990s, first with the Vaisala DSU12 sensor and then with the SD4, SD5 and SD6 sensors produced by Meteoservis. The technical specifications and modes of function of these instruments differ from those of their predecessors and therefore integration of their results into standard sunshine duration series may give rise to significant break-points. In this contribution, we used statistics to analyse differences in sunshine duration totals derived from measurements taken by the CS sunshine recorder and those employing automatic sensors at daily, monthly and annual levels from meteorological stations located at Doksany, Churáňov, Kocelovice, Kostelní Myslová and Prague-Karlov in the Czech Republic. These differences were also evaluated from the point of view of daily cloudiness. Finally, series combining measurements by the CS recorder with those from automatic sensors and series measured by only the CS sunshine recorder were created, homogenised and analysed in terms of long-term fluctuations and annual variations.

中文翻译：

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自动传感器测量日照时数及其对捷克共和国长期序列同质性的影响

摘要：几十年来，捷克共和国的气象站都使用Campbell-Stokes（CS）日照记录仪来测量日照持续时间。但是，自1990年代中期以来，自动设备已逐渐取代了它，首先是使用Vaisala DSU12传感器，然后是Meteoservis生产的SD4，SD5和SD6传感器。这些仪器的技术规格和功能模式与之前的仪器不同，因此将其结果整合到标准的日照时间序列中可能会产生重大的断点。在此贡献中，我们使用统计数据分析了CS日光记录仪和使用位于丘拉索夫Doksany气象站的每日，每月和每年水平的自动传感器进行的测量得出的日照持续时间总量的差异。捷克共和国的Kocelovice，KostelníMyslová和Prague-Karlov。从日常阴天的角度也评估了这些差异。最后，将CS记录仪的测量结果与自动传感器的测量结果进行序列组合，并仅通过CS阳光记录仪的测量结果进行序列化，均质化并根据长期波动和年度变化进行分析。