基于两种数据传输途径的国家级地面自动站逐小时数据差异分析

对2006-2009年两种途径（A文件和Z文件）上传的2400多国家级自动站观测的小时常规六要素资料进行了对比分析。结果表明：两种途径得到的小时数据中，2 min风和10 min风的不一致率较高，主要由两种文件对于风速为零时风向的规定不同造成，其他要素的不一致率相对较低；在不一致数据中，各要素在仪器误差允许范围内的比率分别为气温23.27 %、气压5.4 %、相对湿度23.19 %、降水65.42 %、2 min风12.93 %、10 min风14.16 %。

Differences analysis of historical hourly meteorological data from national basic automatic weather stations due to use of two types of transportation data format

The hourly data of 6 routine meteorological elements at 2400 national automatic weather stations from 2006 to 2009 were compared, and the data were obtained by A files and Z files （ two types of data transport meth- ods）. The results indicate that the hourly 2 min and 10 min wind data from two methods are significantly different because of the different artificial decisions for the wind direction when the wind speed is zero, while the other ele- ments from the two methods have relatively small difference. For the different data in two methods, the rates of temperature,air pressure,relative humidity,precipitation,2 min and 10 min winds within the instrumental error ran- ges are 23.27% ,5.4% ,23.19% ,65.42% ,12. 93% and 14. 16% ,respectively.