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首页> 外文期刊>Advances in Atmospheric Sciences >Errors and Correction of Precipitation Measurements in China
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Errors and Correction of Precipitation Measurements in China

机译：中国降水测量的误差与修正

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摘要

In order to discover the range of various errors in Chinese precipitation measurements and seek a correction method, 30 precipitation evaluation stations were set up countrywide before 1993. All the stations are reference stations in China. To seek a correction method for wind-induced error, a precipitation correction instrument called the "horizontal precipitation gauge" was devised beforehand. Field intercomparison observations regarding 29,000 precipitation events have been conducted using one pit gauge, two elevated operational gauges and one horizontal gauge at the above 30 stations. The range of precipitation measurement errors in China is obtained by analysis of intercomparison measurement results. The distribution of random errors and systematic errors in precipitation measurements are studied in this paper.rnA correction method, especially for wind-induced errors, is developed. The results prove that a correlation of power function exists between the precipitation amount caught by the horizontal gauge and the absolute difference of observations implemented by the operational gauge and pit gauge. The correlation coefficient is 0.99. For operational observations, precipitation correction can be carried out only by parallel observation with a horizontal precipitation gauge. The precipitation accuracy after correction approaches that of the pit gauge. The correction method developed is simple and feasible.
机译：为了发现中国降水测量的各种误差范围并寻求一种校正方法，1993年之前在全国范围内建立了30个降水评估站。所有这些站都是中国的参考站。为了寻求风致误差的校正方法，预先设计了一种称为“水平降水量计”的降水校正仪器。在上述30个站台上，使用一个坑规，两个高位工作规和一个水平规对29,000个降水事件进行了现场比对观测。通过对比对测量结果的分析得出中国降水测量误差的范围。本文研究了降水测量中随机误差和系统误差的分布。开发了一种校正方法，特别是针对风致误差的校正方法。结果证明，水平仪捕获的降水量与工作仪和坑仪实现的观测值的绝对差之间存在幂函数的相关性。相关系数为0.99。对于运行观测，只能通过使用水平降水量计进行平行观测来进行降水校正。校正后的降水精度接近坑规。开发的校正方法简单可行。

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