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On the geophysical processes impacting palaeo-sea-level observations

, Anthony Purcell
Published: 3 April 2021
Geoscience Letters , Volume 8, pp 1-19; doi:10.1186/s40562-021-00184-w

Abstract: Past sea-level change represents the large-scale state of global climate, reflecting the waxing and waning of global ice sheets and the corresponding effect on ocean volume. Recent developments in sampling and analytical methods enable us to more precisely reconstruct past sea-level changes using geological indicators dated by radiometric methods. However, ice-volume changes alone cannot wholly account for these observations of local, relative sea-level change because of various geophysical factors including glacio-hydro-isostatic adjustments (GIA). The mechanisms behind GIA cannot be ignored when reconstructing global ice volume, yet they remain poorly understood within the general sea-level community. In this paper, various geophysical factors affecting sea-level observations are discussed and the details and impacts of these processes on estimates of past ice volumes are introduced.
Keywords: ice / reconstructing / various / geophysical / GIA / sea level observations / impacts of these processes

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