双套自动站地面温度观测数据差异分析

Comparative Analysis of Ground Surface Temperature from Double Automatic Weather Stations

通过对陕西省7个国家气象站2014年新、旧双套自动站逐小时地面温度对比差值进行分析,发现利用现有观测方法和观测设备,地面温度观测值误差较大,数据一致率仅有93.67%,而超差率高达35.70%,且白天误差更为明显。通过对可能影响地面温度观测值的因素进行深入分析,并结合试验结果,得出太阳辐射强度对地面温度观测差值的影响不大,而观测场土质、观测方法、传感器维护以及设备型号与其有密切关系。建议采用采样面积更大的观测设备或观测方法替代现有单支铂电阻直埋观测法。

Base on the analysis of the hourly ground surface temperature differences between new automatic weather station and old one in 7national weather stations of Shanxi in 2014,it is found that the existing observation methods and equipment make large errors of surface temperature.The data consistent rate is only 93.6 7%,while the out-of-tolerance rate reaches 35.70%,and errors are more evident during the daytime.Through an in-depth analysis on the factors that affect the ground temperature observations,combined with the test results,it is concluded that the solar radiation intensity has little effect on the ground temperature observation errors,and the observation field soil,observation method,sensors,and equipment maintenance have a greater impact on errors.Therefore,it is suggested that the infrared remote sensing method should be used to replace the existing observation method of platinum resistance buried directly.