ECMWF产品在东亚中纬度地区预报精度检验

利用求预报场与实况场绝对误差和相关系数，对ECMWF资料进行预报精度检验，结果表明：500hPa高度，850hPa温度和相对湿度，海平面气压等4个物理量场预报较好；850hPa相对湿度预报比700hPa的误差小；东西风预报比南北风预报好；绝对误差值随预报时效延长而增大，相关系数则随预报时效延长而减小。

The Forecast Precision Verification of ECMWF Products over the Mid-latitude Zone of East Asia

Utilizing the absolute errors and the correlate coefficients of forecast field and actuality field, we verify the forecast precision of the ECMWF products. Results show that the four physical quantities including the height in 500hPa, temperature, relative humidity in 850hPa and the sea-level pressure can provide precise information; the forecast error of relative humidity in 850hPa is less than that of 700hPa; the forecasts of east and west winds are more exact than those of the south and north winds; absolute error is a direct dependence upon period validity while correlate coefficient is an inverse measure of it.