新疆地区Emardson大气水汽转换系数的适用性分析

利用积分法计算新疆地区9个无线电探空站2009～2013年的大气水汽转换系数K，将其作为真值，通过选取相同纬度、不同高程的探空站，分析Emardson模型对高程和时间的适用性；并均匀地选取5个探空站，逐年增加样本数据，解算不同样本的模型参数，建立对应的Emardson模型，预测其余4个探空站2014年的K值，验证Emardson模型在时间上的适用性。研究表明：1）在新疆地区，Emardson模型对高程和时间有较好的适用性；2）在时间分布上，增加样本数能在一定程度上提高Emardson模型的精度。

Analysis of the Applicability of the Emardson Model for Transformation Coefficient of Water Vapor in the Region of Xinjiang

In this paper, the conversion factor K of 2009 to 2013 data from 9 radiosonde stations in Xinjiang region is calculated using integral method as a reference value. Through the analysis of K of the Emardson model in the same latitude and different elevation radiosonde stations, we analyze the applicability of elevation. We rationally choose five radiosonde stations, and using different numbers of samples to predict the remaining four radiosonde stations’ K value of 2014, verify the adaptability in planar space and time of the Emardson model. Our research shows that: 1) the Emardson model calculated K with elevation change is relatively stable in Xinjiang; 2) in temporal distribution, increasing the number of samples can improve the accuracy of the Emardson model to a certain extent.