Reconstruction of relative sea-level changes based on a multiproxy study of isolated basins on the Onega Peninsula (the White Sea, northwestern Russia)

Kublitskiy, Yuriy; Repkina, T. Yu.; Leontiev, Piotr; Shilova, Olga; Zaretskaya, N. E.; Gurinov, Artem; Lugovoy, Nikolay; Subetto, Dmitry; Yakovleva, Alena; Nam, Seung‐Il; Kim, Jung-Hyun; Son, Yeong-Ju; Peretrukhina, Anastasiya

doi:10.1016/j.quaint.2022.04.016

Cited by 10 publications

(1 citation statement)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our results can shed light on Holocene transgressions elsewhere, including in the British Isles, Canadian Arctic, British Columbia, Svalbard, Russian Arctic, East Antarctica, and across the Baltic Sea (Zwartz et al, 1998;Forman, 2004;Nixon;Shennan et al, 2018;Rosentau et al, 2021;Kublitskiy et al, 2023;Letham et al, 2024). In contrast to the standard view that such transgressions are solely the result of GMSL temporarily outpacing isostatic uplift, we argue-by extension of our results from Eastern Canada and Norway-that they are also influenced by reverse migration.…”

Section: Implications For Near-field Holocene Transgressionssupporting

confidence: 56%

On the Origin of Holocene Sea-Level Transgressions in Formerly Glaciated Regions

Chester,

Austermann,

D'Andrea

et al. 2024

Preprint

View full text Add to dashboard Cite

Over glacial cycles, the growing and shrinking of ice sheets has caused relative sea level (RSL) to differ from global mean sea level (GMSL) due to glacial isostatic adjustment (GIA), which depends on the viscoelastic properties of the solid Earth. During the last termination and through the Holocene, GIA-related isostatic uplift caused RSL to fall in regions formerly covered by ice sheets. Surrounding these uplifting regions is a narrow band of land where postglacial RSL fall was interrupted during the Holocene by a period of sea-level rise (i.e., a transgression) that culminated in a high stand before sea-level fall resumed. Holocene transgressions and high stands have been well documented in many locations including Norway, the Canadian Atlantic coast, the Canadian Pacific coast, Svalbard, the Baltic Sea, and the British Isles. A leading hypothesis poses that transgression occurred when GMSL rise outpaced isostatic rebound. We investigate the origins of these Holocene transgressions using GIA modeling and test the alternative hypothesis that they are predominantly the result of solid earth deformation. Our results highlight a unique pattern of solid earth deformation in which the region of subsidence (peripheral bulge) surrounding the ice sheet migrates first towards and then away from the melted ice mass. We show how this effect, which we term ‘reverse migration’, is the direct result of the contrast in viscosity between the upper and lower mantle. We compare our GIA model predictions of RSL change to two datasets: 1) RSL data from the last glacial maximum to present and 2) specific constraints on the transgression magnitude in Norway and Eastern Canada. Both datasets better fit RSL predicted by GIA models that include a mantle with a substantial (order of magnitude) increase in viscosity with depth over GIA predictions that don’t include a contrast in mantle viscosity. We argue that this is a useful constraint on the local viscosity structure. Further, this suggests that in contrast to the conventional view that Holocene transgressions record GMSL temporarily outpacing isostatic uplift, solid earth deformation and specifically reverse migration played an important role in generating near-field Holocene transgressions.

show abstract