Natural Hazards and Earth System Science
www.nat-hazards-earth-syst-sci.net
1561-8633
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8
2
2008
10.5194/nhess-8-187-2008
http://www.nat-hazards-earth-syst-sci.net/8/187/2008/
http://www.nat-hazards-earth-syst-sci.net/8/187/2008/nhess-8-187-2008.html
http://www.nat-hazards-earth-syst-sci.net/8/187/2008/nhess-8-187-2008.pdf
187
202
2008-03-11
Tree-ring analysis in natural hazards research – an overview
M. Stoffel
markus.stoffel@unifr.ch
M. Bollschweiler
Laboratory of Dendrogeomorphology, Department of Geosciences, University of Fribourg, Chemin du Musée 4, 1700 Fribourg, Switzerland
The understanding of geomorphic processes and knowledge of past events are
important tasks for the assessment of natural hazards. Tree rings have on
varied occasions proved to be a reliable tool for the acquisition of data on
past events. In this review paper, we provide an overview on the use of tree
rings in natural hazards research, starting with a description of the
different types of disturbances by geomorphic processes and the resulting
growth reactions. Thereafter, a summary is presented on the different
methods commonly used for the analysis and interpretation of reactions in
affected trees. We illustrate selected results from dendrogeomorphological
investigations of geomorphic processes with an emphasis on fluvial (e.g.,
flooding, debris flows) and mass-movement processes (e.g., landslides, snow
avalanche), where lots of data have been generated over the past few
decades. We also present results from rockfall and permafrost studies, where
data are much scarcer, albeit data from tree-ring studies have proved to be
of great value in these fields as well.
<br></br>
Most studies using tree rings have focused on alpine environments in Europe
and North America, whereas other parts of the world have been widely
neglected by dendrogeomorphologists so far. We therefore challenge
researchers to focus on other regions with distinct climates as well, to
look on less frequently studied processes as well and to broaden and improve
approaches and methods commonly used in tree-ring research so as to allow a
better understanding of geomorphic processes, natural hazards and risk.
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