GRACE和GOCE卫星监测的青藏高原重力场特征

Characteristics of gravity field in Tibet Plateau detected by GRACE and GOCE

文章阐述了对青藏高原重力场进行研究的意义,并进一步利用重力卫星GRACE和GOCE的数据对该区域的重力场特征进行了描述。通过对该区域的重力异常、径向引力梯度的计算和分析,可以得出:在青藏高原的西部,有明显的3条重力异常区,这与当地的地形有关,也与断层的位置有关;引力梯度比重力异常具有更高的空间分辨率;重力变化剧烈的区域与梯度的异常区有一定的对应关系,同时也是地球动力活动变化剧烈的区域。

Significance of gravity field research in Tibet Plateau was introduced and then characteristics of gravity field detected by GRACE and GOCE in this area were showed. By the computation and analysis of gravity anomaly and gravity gradients, it was concluded that： there are three gravity anomaly areas in Tibet Plateau, which is not only related with the topography, also with the location of faults; spatial resolution of gravity gradi- ents is higher than that of gravity anomaly; in the place, that gravity changes largely, gravity gradients are often abnormal and phenomena of geodynamics, such as earthquake, often occur.