Analysis of Global Sea Level Change Based on Multi-Source Data

Global sea level rise is both a major indicator and consequence of global warming. At present, warming causing in two main ways: one the thermal expansion water, other injection large amounts fresh water into ocean after glaciers ice sheets melt. In this paper, satellite altimeter data are used to study total changes from 2002 2020. Different most previous studies, proposes calculation method anomaly using only along track altimetry data, which similar considering points as tide gauges, order avoid error caused by interpolation map data. addition, GRACE calculate increase; temperature salinity expansion. Next, results show that rate period 2002–2020 3.3 mm/a. During period, change increase calculated with 2.07 mm/a, seawater 0.62 The volume accounts for 62.7% rise.