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Evaluation of the local sea-level budget at tide gauges since 1958

Wang, J., Church, J. A., Zhang, X., Gregory, J. M., Zanna, L. and Chen, X. (2021) Evaluation of the local sea-level budget at tide gauges since 1958. Geophysical Research Letters, 48 (20). e2021GL094502. ISSN 0094-8276

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To link to this item DOI: 10.1029/2021GL094502


Although global mean sea-level rise since 1900 and regional mean sea-level change since the 1960s have been accounted for in terms of the sum of contributions, the same budget closure has not been achieved for local relative sea-level change from a global network of tide gauges. To address this, we combine new estimates of sterodynamic sea-level change (SDSL; including ocean dynamics), glacial isostatic adjustment (GIA), change in land ice mass and terrestrial water storage, and other local vertical land motion. We find that the observed trends over 1958-2015 at all 272 tide gauges distributed worldwide agree with the sum of contributions (within 90% confidence estimates), with similar mean trend (1.1 mm yr-1) and comparable spatial variability (standard deviation of 2.0 and 1.9 mm yr-1 respectively). SDSL is the dominant contribution to both local observed mean trend and spatial variability, except at locations close to former ice-sheets, where GIA dominates.

Item Type:Article
Divisions:Science > School of Mathematical, Physical and Computational Sciences > NCAS
ID Code:100721
Publisher:American Geophysical Union


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