ID:
publications-2499
Type:
Peer reviewed articles
Year:
2020
Authors:
B. D. Vishwakarma, S. Royston, R. E. M. Riva, R. M. Westaway, J. L. Bamber
Title:
Sea Level Budgets Should Account for Ocean Bottom Deformation
Venue/Journal:
Geophysical Research Letters
DOI:
10.1029/2019gl086492
Research type:
Data Management & Analytics
Water System:
Irrigation Systems
Technical Focus:
Abstract:
AbstractThe conventional sea level budget (SLB) equates changes in sea surface height with the sum of ocean mass and steric change, where solidāEarth movements are included as corrections but limited to the impact of glacial isostatic adjustment. However, changes in ocean mass load also deform the ocean bottom elastically. Until the early 2000s, ocean mass change was relatively small, translating into negligible elastic ocean bottom deformation (OBD), hence neglected in the SLB equation. However, recently ocean mass has increased rapidly; hence, OBD is no longer negligible and likely of similar magnitude to the deep steric sea level contribution. Here, we use a massāvolume framework, which allows the ocean bottom to respond to mass load, to derive a SLB equation that includes OBD. We discuss the theoretical appearance of OBD in the SLB equation and its implications for the global SLB.
Link with Projects:
841407
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