Figure

Observed and projected change in global mean sea level

Figure Created 27 Nov 2023 Published 16 Jan 2024 Last modified 22 Oct 2024

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The left chart depicts the rise in global mean sea level from 1900 to 2022 based on two data sources. All values are relative to the average level of the period 1993-2010, during which the two datasets overlap. The grey line (Palmer et al., 2021) shows the ensemble sea-level reconstruction (using five members) of sea level anomalies during 1900-2010 (Palmer et al., 2021; https://iopscience.iop.org/article/10.1088/1748-9326/abdaec#erlabdaecs2). The dark grey line (CMEMS) shows the altimeter measurements corrected from the Topex-A drift at the beginning of the time series (Legeais et al., 2020), corrected for the GIA using the ICE5G-VM2 GIA model (Peltier, 2004), for the time series from 1993 to 2022. The right chart shows global mean sea level projections under different Shared Socioeconomic Pathways (SSP) scenarios. Sea level projections considering only processes for which projections can be made with at least medium confidence are provided, relative to the period 1995-2014, for five SSP. The scenarios are described in sections TS1.3 and 1.6 and Cross-Chapter Box 1.4 of the Working Group 1 contribution. Sea level projections considering only processes for which projections can be made with at least medium confidence are provided, relative to the period 1995-2014, for five SSP. The scenarios are described in sections TS1.3 and 1.6 and Cross-Chapter Box 1.4 of the Working Group 1 contribution.