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Observed and projected change in global mean sea level

Figure Created 04 Dec 2020 Published 11 Dec 2020 Last modified 25 Nov 2021
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This page was archived on 25 Nov 2021 with reason: Other (New version data-and-maps/figures/observed-change-in-global-mean-1 was published)
The left panel depicts the rise in global mean sea level from 1880 to 2019 based on two data sources. The red line (DMW) shows the hybrid sea-level reconstruction of sea level anomalies during 1900–2015 (Dangendorf et al., 2019). The uncertainty interval around is shaded. The dark blue line (CMEMS) shows the filtered sea level anomalies for the time period from 1993 to 2019 based on satellite observations (Ablain et al., 2017; WCRP Sea Level Budget Group, 2018). All values are relative to the average level of the period 1993-2012, during which the two datasets overlap. The right panel shows projections of global mean sea level until 2100 for three emissions scenarios based on the IPCC SROCC (Special Report on the Ocean and Cryosphere in a Changing Climate).

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information.png Methodology:

For the DMW data: Dangendorf et al., 2019 (https://doi.org/10.1038/s41558-019-0531-8).

For the CMEMS data: Temporal evolution of globally averaged daily Mean Sea Level, as observed by satellites, without annual and semi-annual signals,  corrected for the TOPEX-A instrumental drift (Ablain et al., 2017; WCRP Sea Level Budget Group, 2018), and corrected for the GIA using the ICE5G-VM2 GIA model (Peltier, 2004). 'Filtered' refers to 9-month low-pass filtered Mean Sea Level (red line) anomalies relative to the 1993-2012 mean. 

For the IPCC SROCC data: https://www.ipcc.ch/srocc/download-report/ 

information.png Units:

mm

information.png Rights:
EEA standard re-use policy: unless otherwise indicated, re-use of content on the EEA website for commercial or non-commercial purposes is permitted free of charge, provided that the source is acknowledged (https://www.eea.europa.eu/legal/copyright). Copyright holder: Copernicus Marine Environment Monitoring Service, Intergovernmental Panel on Climate Change (IPCC), Universität Siegen.
information.png Owners:
Copernicus Marine Environment Monitoring Service
Intergovernmental Panel on Climate Change (IPCC)
Universität Siegen
information.png Processors:
European Environment Agency (EEA)
information.png Figure type:
Graph

Related content

Based on data

External Data Spec Time Series of Mean Sea Level Trends over Global Ocean The sea level ocean monitoring indicator is derived from the DUACS delayed-time (DT-2018 version) altimeter gridded maps of sea level anomalies based on a stable number of altimeters (two) in the satellite constellation. These products are distributed by the Copernicus Climate Change Service and are also available in the CMEMS catalogue (SEALEVEL_GLO_PHY_CLIMATE_L4_REP_OBSERVATIONS_008_057). The mean sea level evolution estimated in the global ocean is derived from the average of the gridded sea level maps weighted by the cosine of the latitude. The annual and semi-annual periodic signals are adjusted and the time series is low-pass filtered. The curve is corrected for the effect of the Glacial Isostatic Adjustment using the ICE5G-VM2 GIA model (Peltier, 2004).
External Data Spec IPCC SROCC data on sea level rise This data archive comprises all data underlying figures and maps in Chapter 4 (Sea Level Rise and Implications for Low Lying Islands, Coasts and Communities) of the Special Report on the Ocean and Cryosphere in a Changing Climate published in 2019.
External Data Spec Global mean sea level reconstruction (Uni Siegen) This dataset is described in the following publications: Dangendorf et al. 2019: Persistent acceleration in global sea-level rise since the 1960s, doi:10.1038/s41558-019-0531-8

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For references, please go to https://www.eea.europa.eu/data-and-maps/figures/observed-change-in-global-mean or scan the QR code.

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Filed under: climate change, sea level
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