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| Titel |
Extreme sea events during the last millennium in the northeast of Morocco |
| VerfasserIn |
O. Raji, L. Dezileau, U. Grafenstein, S. Niazi, M. Snoussi, P. Martinez |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Sciences ; 15, no. 2 ; Nr. 15, no. 2 (2015-02-03), S.203-211 |
| Datensatznummer |
250119312
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| Publikation (Nr.) |
 copernicus.org/nhess-15-203-2015.pdf |
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| Zusammenfassung |
| The Moroccan Mediterranean coast is located in one of the area's most vulnerable to extreme weather events or tsunami hazards. The objective of this
research is to reconstruct the historical extreme submersion-event record
using sea-induced deposits preserved in coastal lagoon. The Nador lagoon is
the largest Moroccan lagoon (115 km2). It is located along the western
Mediterranean, which has a high cyclogenetic character and is exposed to
tsunamis from the Alboran Sea. The sandy barrier which separates the lagoon from
the Mediterranean Sea is marked by much overwash, which indicate how
intensely it has been exposed to the adverse sea events through history. Using
the UWITEC© gravity coring platform, an undisturbed MC4.5 core (1.15 m long) was
successfully sampled in the studied lagoon. To identify extreme sea events, a
multi-proxy approach was applied combining sedimentological and geochemical
data. Three paleoevents were identified; all of them are concentrated over
the last 500 years, and the most recent event corresponds to the 1889 storm.
For the others deposits, it is difficult to determine exactly their origin;
however, the high frequency of storm events over the relevant period and the
absence of historical tsunamis evidence is more in favor of the
meteorological origin. |
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