Pluvio^2称重式雨雪量器在北京市降水量自动化监测中的应用研究

Study on application of Pluvio2 weighting rain-gauge in precipitation automatic monitoring in Beijing

运用最小二乘法、双累积曲线法和不同系列对比法分析了北京市5座雨量站2010—2011年20 cm口径雨量器和Pluvio2称重式雨雪量器实测降水量数据,分析得出Pluvio2称重式雨雪量器同20 cm口径雨量器月降水量观测数据相关系数0.990 0以上,双累积图线性拟合情况好,两雨量器监测数据成果相关显著。Pluvio2称重式雨雪量器有效减少了湿润误差对观测数据的影响,年降水量较20 cm口径雨量器偏大1%～3%,监测的降水量更接近于真实值。作为目前较为先进的仪器,Pluvio2称重式雨雪量器可以进行冰期降雪自动化监测,从而实现全年不间断降水量自动化采集,对受固态降水(如雪、冰雹等)影响的北方地区尤其适用。

Using least-square method, double-cumulative curve method and time series contrasting method to analyze the relationship between measured data derived from 20 era-diameter rain-gauge and Pluvio^2 weighting rain-gauge. The data used were derived from five rain-gauge stations and measured in years of 2010 and 2011. The results showed that the correlation coefficient between monthly measured data derived from those two different types of rain-gauge were greater than 0.990 0 and there is significant relationships between those two data sets. The impacts of moist errors on measured data was reduced by Pluvio^2 weighting rain-gauge and compared with 20 cm-diameter rain-gauge, measured data by 3% in value. As the advanced rain-gauge, Pluvio^2 weighting Pluvio^2 weighting rain-gauge were greater by 1%- rain-gauge has capability of automatic monitoring snow-fall during winter time and is able to measured rain-fall continuously for the whole year period.