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Advanced Taiwan Ocean Prediction System

Tseng, Tsu-Lun - ALL News | 2019-02-19 | Count:146


Title: GRACE observation of global mass change

Abstract: This presentation will show the principle of GRACE gravimetry and some case studies. The GRACE satellite mission uses two satellites (A and B) to detect changes in their line-of-sight velocities, which are then inverted to compute the earth’s gravity fields at one-month intervals over 2002-2017. Mass changes, such as those induced by groundwater loss, glacier melts at Greenland and the Himalayas, earthquakes, isostatic crustal rebound, lake level change, ocean circulation and sedimentation, can result in gravity changes that are detectable in the GRACE-derived time-varying gravity fields. Examples in Kalimantan, the Himalayas, Greenland, the East China Sea and the South China Sea will be given.

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