Abstract:In this paper, the accuracy of Bevis empirical formula, GTm-Ⅱ and GTm-Ⅲ models is validated using the sounding data in year 2014 provided by integrated global radiosonde archive. Furthermore, the variation characteristics of the accuracy for these three models with latitude and season are also analyzed. Results show that the overall precision of the GTm-Ⅲ model is superior to the other two models on a global scale. The MAE and RMS values for the GTm-Ⅲ model are 3.26 and 4.10 K, respectively in global scale. It also can be found that these three models show a higher accuracy in low-middle latitude regions than at high latitude regions and that the precision of Bevis empirical formula and the GTm-Ⅱ model display a hemispherically asymmetric pattern. The seasonal variation characteristics of the accuracy for the GTm-Ⅱ, GTm-Ⅲ models and the Bevis formula present consistent variable trends and the RMS differences between four seasons are at range of 2~3 K.
LI Qinzheng,CHEN Peng,Chen Xiandong. Accuracy Validation and Analysis of Several Global Weighted Mean Temperature Models[J]. jgg, 2016, 36(12): 1064-1068.