| 几种全球加权平均温度模型的精度验证与分析 |
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| 引用本文： | 李秦政,陈鹏,陈宪冬.几种全球加权平均温度模型的精度验证与分析[J].大地测量与地球动力学,2016,36(12):1064-1068. |
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| 作者姓名： | 李秦政 陈鹏 陈宪冬 |
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| 摘 要： | 利用IGRA提供的全球593个无线电探空站2014年的探空资料，对Bevis 经验公式、GTm-Ⅱ和GTm-Ⅲ模型进行精度验证，对各模型随纬度、季节的变化规律进行分析研究。结果表明，在全球范围内，GTm-Ⅲ模型的总体精度（MAE=3.26 K, RMS=4.10 K）要优于另外两个模型；3种模型的精度在中低纬度地区较高，高纬度地区较低；Bevis公式和GTm-Ⅱ模型的精度在南北半球具有不对称性；各模型精度的季节性变化规律基本一致，模型的RMS在不同季节相差2~3 K。
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| 关 键 词： | 加权平均温度 GTm-Ⅱ GTm-Ⅲ 精度 |
Accuracy Validation and Analysis of Several Global Weighted Mean Temperature Models |
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| LI Qinzheng,CHEN Peng,Chen Xiandong.Accuracy Validation and Analysis of Several Global Weighted Mean Temperature Models[J].Journal of Geodesy and Geodynamics,2016,36(12):1064-1068. |
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| Authors: | LI Qinzheng CHEN Peng Chen Xiandong |
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| 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. |
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| Keywords: | weighted mean temprature GTm-Ⅱ GTm-Ⅲ accuracy |
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