Large-scale coastal impact induced by a catastrophic storm
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Large-scale coastal impact induced by a catastrophic storm. / Fruergaard, Mikkel; Andersen, Thorbjørn Joest; Johannessen, Peter N; Nielsen, Lars Henrik; Pejrup, Morten.
2014. Abstract fra Ocean Sciences Meeting 2014, Honolulu, USA.Publikation: Konferencebidrag › Konferenceabstrakt til konference › Forskning
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T1 - Large-scale coastal impact induced by a catastrophic storm
AU - Fruergaard, Mikkel
AU - Andersen, Thorbjørn Joest
AU - Johannessen, Peter N
AU - Nielsen, Lars Henrik
AU - Pejrup, Morten
PY - 2014
Y1 - 2014
N2 - Catastrophic storms and storm surges induce rapid and substantial changes along sandy barrier coasts, potentially causing severe environmental and economic damage. Coastal impacts of modern storms are associated with washover deposition, dune erosion, barrier breaching, and coastline and shoreface erosion. Little is however known about the impact of major storms and their post-storm coastal recovery on geologic and historic evolution of barrier systems. We apply high-resolution optically stimulated luminescence dating on a barrier system in the Wadden Sea (Denmark) and show that 5 to 8 meters of marine sand accumulated in an aggrading-prograding shoal and on a prograding shoreface during and within 3 to 4 decades (“healing phase”) after the most destructive storm documented for the Wadden Sea. Furthermore, we show that the impact of this storm caused large-scale shoreline erosion and barrier breaching. Our results demonstrate that violent, millennial-scale storms can trigger significant large-scale and long-term changes on barrier coasts, and that coastal changes assumed to take place over centuries or even millennia may occur in association with a single extreme storm event.
AB - Catastrophic storms and storm surges induce rapid and substantial changes along sandy barrier coasts, potentially causing severe environmental and economic damage. Coastal impacts of modern storms are associated with washover deposition, dune erosion, barrier breaching, and coastline and shoreface erosion. Little is however known about the impact of major storms and their post-storm coastal recovery on geologic and historic evolution of barrier systems. We apply high-resolution optically stimulated luminescence dating on a barrier system in the Wadden Sea (Denmark) and show that 5 to 8 meters of marine sand accumulated in an aggrading-prograding shoal and on a prograding shoreface during and within 3 to 4 decades (“healing phase”) after the most destructive storm documented for the Wadden Sea. Furthermore, we show that the impact of this storm caused large-scale shoreline erosion and barrier breaching. Our results demonstrate that violent, millennial-scale storms can trigger significant large-scale and long-term changes on barrier coasts, and that coastal changes assumed to take place over centuries or even millennia may occur in association with a single extreme storm event.
M3 - Conference abstract for conference
T2 - Ocean Sciences Meeting 2014
Y2 - 23 February 2014 through 28 February 2014
ER -
ID: 105588315