称重与人工观测降水对比分析

Comparative analysis on rainfall observation by weighing sensor and manual method

通过对顺义气象站2010～2013年称重法与人工观测的降水观测资料进行对比，对两种观测方式的观测原理、结构等方面进行了介绍，对比分析了观测记录的差异。分析表明：称重法与人工观测法之间的差值与观测方式无关，降水观测种类对差值有影响，但不是差值产生的主要原因。称重法与人工观测法测得的日降水量呈线性相关，相关系数为0．999。尽管称重法与人工观测法测得的降水量存在差异，但基本符合自动站的技术标准和地面气象观测业务规范，能满足日常业务的使用。

This paper adopts the observation data obtained from the weighing sensor and artificial instruments from 2010 to 2013 in Shunyi station. The structure and principle of two observation methods are briefly introduced. Then, the differences between the two observation methods are analyzed in detail. The results show that the differences between the weighing sensor and manual observation have nothing to do with the observation methods. The precipitation patterns have little effect upon the differences. The daily precipitation of the weighing sensor is linearly relative to that from artificial instruments. Its coefficient index is 0. 999. There is the difference in rainfall between weighing sensor and manual observation. But the data in accordance with the technical standard of automatic station and surface meteorological observation practice basically meets the daily operation needs.