Articles | Volume 18, issue 8
https://doi.org/10.5194/essd-18-6043-2026
https://doi.org/10.5194/essd-18-6043-2026
Data description article
 | 
25 Aug 2026
Data description article |  | 25 Aug 2026

SO_SLICE: a 19-year gridded sea level anomaly dataset for the open and ice-covered Southern Ocean (2003–2021)

Cosme Mosneron Dupin, Jean-Baptiste Sallée, and Casimir de Lavergne

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Cited articles

Androsov, A., Boebel, O., Schröter, J., Danilov, S., Macrander, A., and Ivanciu, I.: Ocean Bottom Pressure Variability: Can It Be Reliably Modeled?, J. Geophys. Res.-Oceans, 125, e2019JC015469, https://doi.org/10.1029/2019JC015469, 2020. 
Armitage, T. W. K. and Davidson, M. W. J.: Using the Interferometric Capabilities of the ESA CryoSat-2 Mission to Improve the Accuracy of Sea Ice Freeboard Retrievals, IEEE T. Geosci. Remote Sens., 52, 529–536, https://doi.org/10.1109/TGRS.2013.2242082, 2014. 
Armitage, T. W. K., Bacon, S., Ridout, A. L., Thomas, S. F., Aksenov, Y., and Wingham, D. J.: Arctic sea surface height variability and change from satellite radar altimetry and GRACE, 2003–2014, J. Geophys. Res.-Oceans, 121, 4303–4322, https://doi.org/10.1002/2015JC011579, 2016. 
Armitage, T. W. K., Kwok, R., Thompson, A. F., and Cunningham, G.: Dynamic Topography and Sea Level Anomalies of the Southern Ocean: Variability and Teleconnections, J. Geophys. Res.-Oceans, 123, 613–630, https://doi.org/10.1002/2017JC013534, 2018. 
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Sea level is a key indicator of ocean change, but it is hard to measure around Antarctica, where sea ice hides the ocean from satellites. Yet satellites flying over the ice still receive clear echoes from openings in the ice, where water is exposed. We reprocessed these echoes from four satellite missions and combined them with open-water data, building the longest sea level record for the whole Southern Ocean (2003 to 2021). It offers a new way to track how this rapidly changing region evolves.

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