顾及多因子影响的中国西部地区大气加权平均温度模型精化研究  

Refinement of Atmospheric Weighted Mean Temperature Model Considering the Effects of Multiple Factors for Western China

作　　者：莫智翔 黎杏 黄良珂 刘立龙 韦欣怡 周清华 MO Zhixiang;LI Xing;HUANG Liangke;LIU Lilong;WEI Xinyi;ZHOU Qinghua(College of Geomatics and Geoinformation,Guilin University of Technology,319 Yanshan Street,Guilin 541004,China;Guangxi Key Laboratory of Spatial Information and Geomatics,319 Yanshan Street,Guilin 541004,China)

机构地区：[1]桂林理工大学测绘地理信息学院,桂林市541006 [2]广西空间信息与测绘重点实验室,桂林市541006

出　　处：《大地测量与地球动力学》2021年第2期145-151,共7页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41704027,41664002,41864002);广西自然科学基金(2017GXNSFBA198139,2017GXNSFDA198016,2018GXNSFAA281182,2018GXNSFAA281279,2018GXNSFAA294045);广西“八桂学者”岗位专项。

摘　　要：针对中国西部地区地形起伏较大等情况,分析大气加权平均温度(T m)与测站高程、地面温度的关系,利用2014~2016年探空数据,在Bevis模型基础上建立一种与地面温度、高程和季节变化有关的新T m模型。以2017年探空数据为参考值,对新模型进行精度分析,并与广泛使用的Bevis模型和GPT2w模型进行精度比较。结果表明,以探空数据为参考值,新模型的年均偏差和均方根误差(RMS)分别为-0.08 K和3.89 K,相比Bevis模型、GPT2w-5模型和GPT2w-1模型,其精度(RMS值)分别提高14.3%、20.6%和9.3%。此外,将新T m模型用于GNSS水汽计算,其水汽计算理论RMS误差和相对误差分别为0.22 mm和1.43%,新模型在中国西部地区的GNSS水汽探测中具有重要的应用价值。In this paper,for highly undulating terrain in western China,we analyze the relationships between T m and height,T m and surface temperature in western China using radiosonde data from 2014 to 2016.We establish a new T m model related to the surface temperature,height and season variations based on Bevis formula.Then,we assess the new T m model by comparing with the widely used Bevis formula and GPT2w model using 2017 radiosonde data as reference values.The results show that the annual bias and RMS error of the new T m model are-0.08 K and 3.89 K respectively,and the RMS of the new T m model has decreased by approximately 14.3%,20.6%and 9.3%against Bevis model,GPT2w-5 and GPT2w-1,respectively.In addition,the new T m model has RMS PWV and RMS PWV/PWV values of 0.22 mm and 1.43%when used to estimate GNSS-PWV.Therefore,the new model has critical applications in GNSS-PWV remote sensing in western China.

关 键 词：大气加权平均温度 新T m模型 中国西部地区 GNSS大气水汽 

分 类 号：P228[天文地球—大地测量学与测量工程]