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| Titel |
The role of extreme winter storms in the overall retreat pattern of an actively eroding eolianite coastal cliff-line in the eastern Mediterranean |
| VerfasserIn |
A. Mushkin, O. Katz |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250065525
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| Zusammenfassung |
| Eolianite cliffs along the Mediterranean coast of Israel form an actively eroding 55-km-long
linear feature with local average retreat rates of up to 0.3 m/year over the past 60 years. Here,
we investigate the effect of extreme winter storms with decadal-scale recurrence
intervals, on the overall retreat pattern of this ‘weak rock’ coastal cliff-line. Repeat
high-resolution (1-2 cm) ground based LiDAR surveys before and after an extreme
’20-year’ winter storm that occurred in the eastern Mediterranean during December
2010 allowed us to characterize syn- and post-storm erosional effects at cm-km
scales.
The LiDAR surveys documented cliff instability initiated by syn-storm erosion of basal
cliff notches that propagated up-cliff during the months that followed and lead to post-storm
activity, which constituted >75% of the total storm-related cliff erosion. The latter occurred
primarily as discrete catastrophic gravity driven slope-failure events that range in volume
between 100-103 m3. The cliff-line returned to its long-term activity level ~5 months after
the storm. Locally, storm induced landward cliff retreat reached 7 m, which is comparable to
the total retreat previously documented along this coastal stretch during the past 60 years.
Yet, in a broader spatial context, cliff-retreat associated with the December 2010 storm
accounts for |
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