不同Mascon模型解比较分析

Comparison and Analysis of Different Mascon Model Results

简要介绍不同机构发布的Mascon模型解数据,并在全球和区域尺度上对Mascon模型解、球谐系数法以及GLDAS水文模型陆地水储量变化计算结果进行对比分析。结果表明,不同Mascon模型解具有较好的一致性;与球谐系数法反演结果相比,Mascon模型解能提高反演结果信噪比值,空间分辨率更高,保留更多有效信号,与GLDAS水文模型结果相关性更好;不同Mascon模型解中,JPL Mascon模型解信噪比值最大,与GLDAS水文模型时间序列相关性最好。

The Mascon data published by different research institutions are introduced briefly in this paper.Pesults of terrestial water storage variation which calculated by Mascon data,GLDAS model data and spherical harmonic coefficients method are compared in global and regional scales.The results show that Mascon data of different institutions have consistency.Signal-to-noise ratio and spatial resolution of terrestrial water storage variation results are improved by the Mascon method compared with the spherical harmonic coefficients method.More true signals of regional mass variation are kept.Time series of regional terrestrial water storage variation results which calculated by Mascon data are more relevant to GLDAS model results compared with the results of the spherical harmonic coefficients method.The signal-to-noise ratio of global surface mass variation inversion results by Mascon data are larger than results of spherical harmonic coefficients method.The JPL Mascon results are maximal.