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Dendrogeomorphic reconstruction of lahar events at Klyuchevskoy and Shiveluch volcanoes (Kamtchatka, Russia)
Presented by Mrs. Annina SORG on 15 May 2013 from 18:00 to 21:00
Type: Poster Presentation
Session: Poster Session + Reception
Board #: 61
Changing climatic conditions and volcanic activity on the Kamchatka Peninsula have triggered a large number of devastating volcanic debris flows (lahars), which have the potential to develop considerable reach and devastate populated areas. While there are complete records of the past decades for volcano eruptions around the village of Klyuchi, lahars have only been recorded when infrastructure was damaged. In order to better understand the spatial and temporal dynamics of lahars, we sampled 60 willows (Salix sp.) and 90 larches (Larix gmelini) growing on the foothills of Klyuchevskoy and Shiveluch volcanoes. All sampled trees show signs of lahar activity, in the form of injuries, burial, tilting or root exposure. Dendrogeomorphic analysis was complemented by information from satellite imagery to reconstruct the frequency and spatial patterns of recorded and unrecorded lahars, which was then set into context with volcanic eruptions and climate data so as to discriminate hot from cold lahars.