利用三维加速度点质量模型法监测2010年中国西南干旱  

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

作　　者：苏勇[1,2] 魏伟 李琼 谷延超 SU Yong;WEI Wei;LI Qiong;GU Yanchao(School of Civil Engineering and Geomatics,Southwest Petroleum University,8 Xindu Road,Chengdu 610500,China;School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China)

机构地区：[1]西南石油大学土木工程与测绘学院,成都市610500 [2]武汉大学测绘学院,武汉市430079

出　　处：《大地测量与地球动力学》2022年第4期403-409,共7页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41804077,41931074)。

摘　　要：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,在剔除季节性信号后,利用主成分分析法对水储量异常进行分析。结果表明,西南地区在2009年秋至2010年春存在明显的水储量负异常特征。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.

关 键 词：三维加速度点质量模型法 空间约束 水文模型 主成分分析 中国西南干旱 

分 类 号：P223[天文地球—大地测量学与测量工程]