利用三维加速度点质量模型法监测2010年中国西南干旱

在附有空间约束的三维加速度点质量模型法的基础上引入水文模型进行约束,利用水文模型计算地理点之间的相关性,采用L曲线法确定最优正则化参数.计算结果表明,引入水文模型的三维加速度点质量模型法相比零阶Tikhonov约束的三维加速度点质量模型法信噪比大于0的比例更高.采用该方法对2010年中国西南地区干旱情况进行监测;同时,...

Drought Monitoring in Southwest China in 2010 Using Three-Dimensional Acceleration Point-Mass Modeling Approach

Based on the three-dimensional point-mass modeling approach with spatial constraint, we introduce a hydrological model to calculate the correlation coefficient between geographical points. The L-curve method is used to determine the optimal regularization parameters. The results show that the three-dimensional point-mass modeling approach after the introduction of hydrological model has higher proportion of signal-to-noise ratio greater than 0 than the method with zero order Tikhonov constraint. We use this method to monitor the drought in southwest China in 2010. We also use principal component analysis method to analyze the water storage anomaly in southwest China after removing seasonal signals. The results show that the water storage in southwest China has an obvious negative anomaly from autumn 2009 to spring 2010.