基于GNSS/MET和微波辐射计资料的合肥地区大气可降水量变化特征分析

Analysis on variation characteristics of atmospheric precipitable water in Hefei based on GNSS/MET and microwave radiometer data

文章结合2020—2021年合肥国家基本站的GNSS/MET和微波辐射计2个设备探测资料,演算了大气可降水情况的具体信息,分析2者的变化特征和差异。结果表明:GNSS/MET与微波辐射计反演的值变化趋势一致,具有较好的相关性,可以较好地反映合肥地区上空的水汽变化,但也存在明显偏差,其中均方根误差最大值在夏季,最小值在冬季,而相对方差则相反。对比来看,微波辐射计资料在夏季和秋季更具有代表性。

Combined with the GNSS/MET and microwave radiometer detection data of Hefei National Basic Station from 2020 to 2021,this paper calculates the specific information of atmospheric precipitation,and analyzes the change characteristics and differences of the two.The results show that the variation trends of GNSS/MET and microwave radiometer values are consistent and have a good correlation,which can better reflect the change of water vapor over Hefei area,but there are also obvious deviations.The root mean square error is the largest in summer and the smallest in winter,while the relative variance is the opposite.From the comparison,the microwave radiometer data are more representative in summer and autumn.