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Occasional but severe: Past debris flows and snow avalanches in the Helmos Mts. (Greece) reconstructed from tree-ring records by Radek Tichavský; Andrea Fabiánová; Aristeidis Koutroulis; Vilém Spálovský is a Environmental Science article available to read on EtoBox.

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The eastern Mediterranean is a hotspot in terms of geomorphic hazards, but the activity of gravitational processes in mountainous areas is largely unexplored. We carried out dendrogeomorphic research in the Helmos Mountains (Northern Peloponnese, Greece) to determine the timing, spatial extent, and hydrometeorological triggers of debris flows and snow avalanches. Specifically, we sampled increment cores from 123 injured Greek firs (Abies cephalonica L.) growing on a debris flow cone and growing along a snow avalanche track. Tree rings were counted and cross-dated with the reference chronology using CooRecorder and CDendro software and the event years were determined on the basis of the location of scars and traumatic resin ducts. We compiled an 118-year chronology (1904-2021) with seven debris flow event years and only one severe debris flow occurring in the 1970/1971 dormant period (W = 148.0), followed by spatially limited records for 1986/1987 (W = 3.8) and 1993/1994 (W = 2.5). Similarly, seven snow avalanche event years were identified in the period 1854-2021, with one major event in 1997/1998 (W = 304.5) followed by the 1998/1999 event (W = 6.3). Extremely wet conditions in Fe

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Author

Radek Tichavský; Andrea Fabiánová; Aristeidis Koutroulis; Vilém Spálovský

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Environmental Science (Physical Sciences)