午夜欧美大片免费观看,欧美激情综合五月色丁香,亚洲日本在线视频观看,午夜精品福利在线

Through parallel observation, the temperature data from both conventional stations and automatic weather stations (AWS) in winter with snow cover at three stations of Dezhou Meteorological Bureau (Lingxian, 2003 to 2004; Wu Yi, 2004 to 2005; Dezhou, 2006 to 2007) are analyzed statistically. The ratio of conventionally measured snow surface temperature to the AWS measured under the condition of snow cover is gained. Since ground temperature can be better representative of the actual situation on the ground, the ratio can be used as a useful and better parameter in surface temperature measurement for scientists in the related fields such as hydrological and agricultural departments.