J 2024

A Boulder Beach Formed by Waves From a Calving Glacier Revisited: Multidecadal Tsunami–Controlled Coastal Changes in Front of Eqip Sermia, West Greenland

KOSTRZEWA, Oskar; Małgorzata SZCZYPIŃSKA; Jan KAVAN; Krzysztof SENDERAK; Milan NOVÁK et al.

Základní údaje

Originální název

A Boulder Beach Formed by Waves From a Calving Glacier Revisited: Multidecadal Tsunami–Controlled Coastal Changes in Front of Eqip Sermia, West Greenland

Autoři

KOSTRZEWA, Oskar; Małgorzata SZCZYPIŃSKA; Jan KAVAN; Krzysztof SENDERAK; Milan NOVÁK a Mateusz C. STRZELECKI

Vydání

Permafrost and Periglacial Processes, Wiley, 2024, 1045-6740

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10508 Physical geography

Utajení

není předmětem státního či obchodního tajemství

Odkazy

Impakt faktor

Impact factor: 3.300

Označené pro přenos do RIV

Ne

Organizační jednotka

Přírodovědecká fakulta

EID Scopus

Štítky

Příznaky

Mezinárodní význam, Recenzováno
Změněno: 13. 1. 2025 09:04, Mgr. Marie Novosadová Šípková, DiS.

Anotace

V originále

The calving of glaciers regularly produces tsunami-like waves that pose a serious threat to coastal environments. Those strong waves are not only able to move ice mélange and redistribute icebergs, growlers, or sea ice across a fjord but also flood and remodel neighbouring cliffs and beaches. Here, we analyze over 90 years (1929–2023) of coastal zone changes that occurred in front of Eqip Sermia. We show that calving waves play a dominant role in transforming the lateral moraine and forming a beach and spit system south of the glacier front. Part of the former moraine has transformed into a boulder-dominated spit, which closed the lagoon over the years. By multidecadal analysis, we also detected a significant erosion of unconsolidated cliffs located on the opposite side of the bay (~0.53 m per year between 1985 and 2023). In addition, we demonstrate that even a single event (one calving wave) can remodel a beach surface by entrainment of up to 1.8-m-diameter boulders and the erosion of the beach surface by washing away sand and gravel from rocky outcrops. Our study constitutes important progress toward modes of paraglacial coastal evolution in regions characterized by rapidly retreating calving glaciers.