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.