scholarly journals Dendrogeomorphology of Different Landslide Types: A Review

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 261
Author(s):  
Karel Šilhán
Keyword(s):  
Tree Ring ◽  
Specific Growth ◽  
Signal Extraction ◽  
Climate Variations ◽  
High Importance ◽  
Growth Disturbances ◽  
Landslide Activity ◽  
Absolute Dating ◽  
Ring Analysis ◽  
Geomorphic Processes

The dating of past landslide events is one of the most crucial aspects of landslide research, leading to a better understanding of past landslide activity. Landslides can be extremely dangerous natural hazards, and thus, solving the relationships between their activity and climate variations is of high importance. For these purposes, data about past landslide activity are fundamental for such analyses. Various methods of landslide absolute dating exist, but the most precise approach that dates back several centuries is based on tree-ring analysis (dendrogeomorphology). Landslide movements can affect the growth of trees in response to specific growth disturbances. Although dendrogeomorphic methods are successfully used for dating other geomorphic processes, their use in landslide research is actually the most frequent. Dendrogeomorphic research on landslides is strongly influenced by general approaches of landslide signal extraction from tree-ring series of disturbed trees and by the type of landslide (varying by morphology, material and mechanism of movement). This study provides an overview of basic aspects of dendrogeomorphic research on landslides, and more specifically, it reviews basic tree-ring-based approaches of landslide dating. Presented review focuses on various landslide types and their effect on dendrogeomorphic dating. This review is built from the extensive database of all accessible dendrogeomorphic studies of landslides from 1893 to 2020. Moreover, recommendations for specific sampling and approach choice in individual landslide types are presented. Finally, limits of tree-ring-based approaches are presented, including provided proposals for further research.

John F. Shroder, Jr.’s 1978 and 1980 papers on dendrogeomorphology

2013 ◽  
Vol 37 (5) ◽  
pp. 717-721 ◽  
Author(s):  
David R. Butler ◽  
Markus Stoffel
Keyword(s):  
Tree Ring ◽  
Index Number ◽  
Quantitative Index ◽  
Research Papers ◽  
Tree Ring Analysis ◽  
Event Response ◽  
Process Event ◽  
Ring Analysis ◽  
Geomorphic Processes

Dendrogeomorphology is the application of tree-ring analysis for the dating of geomorphic processes. Although defined elsewhere, Shroder (1978, 1980) provided the foundation and methodologies for dendrogeomorphology that continue to underpin the discipline more than 30 years after the publication of his research papers. His process-event-response methodology and development of a semi-quantitative index number are techniques employed or discussed in virtually every recent paper within the field of dendrogeomorphology.

scholarly journals Tree-ring analysis in natural hazards research – an overview

2008 ◽  
Vol 8 (2) ◽  
pp. 187-202 ◽  
Author(s):  
M. Stoffel ◽  
M. Bollschweiler
Keyword(s):  
Natural Hazards ◽  
Tree Ring ◽  
Tree Rings ◽  
Review Paper ◽  
Mass Movement ◽  
The Past ◽  
Different Types ◽  
Ring Analysis ◽  
Alpine Environments ◽  
Geomorphic Processes

Abstract. 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. 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.

scholarly journals Geomorphologie und Jahrringe – Feldmethoden in der Dendrogeomorphologie | Geomorphology and tree rings – field methods in dendrogeomorphology

2004 ◽  
Vol 155 (6) ◽  
pp. 198-207 ◽  
Author(s):  
Holger Gärtner ◽  
Jan Esper ◽  
Kerstin Treydte
Keyword(s):  
Tree Ring ◽  
Temporal Resolution ◽  
Tree Rings ◽  
Site Selection ◽  
Field Methods ◽  
Tree Ring Analysis ◽  
Local Reference ◽  
Ring Analysis ◽  
Geomorphic Processes ◽  
Selection Of

In terms of the spatiotemporal reconstruction of geomorphic processes the application of tree-ring analysis has the highest level of temporal resolution in geomorphology. Dating and the resulting reconstructions can be assigned to exact calendar years, sometimes even to specific seasons. To guarantee this,one has to take into account that there are great differences between methods in the field and other tree-ring related fields of research. Following site selection a detailed relief analysis and process must be carried out in order to determine and select those trees obviously disturbed by these processes. The method of sampling is of the utmost importance. Selection of the samples must be based on the estimated kind of disturbance and therefore corresponds to the specific disturbance of a given species and not to the site being investigated. Furthermore,in order to be able to accurately date the disturbances it is absolutely essential to produce a local reference chronology.

A chronology of landslide activity in the valley of Rivière du Gouffre, Charlevoix, Quebec

1991 ◽  
Vol 28 (2) ◽  
pp. 250-256 ◽  
Author(s):  
Louise Filion ◽  
François Quinty ◽  
Christian Bégin
Keyword(s):  
Tree Ring ◽  
Large Earthquake ◽  
Radiocarbon Dates ◽  
Tree Ring Analysis ◽  
Small Lake ◽  
Landslide Activity ◽  
Ring Analysis

Data on earthquake-induced landslides in the valley of Rivière du Gouffre in the Charlevoix region of Quebec are presented. A set of 37 radiocarbon dates obtained from tree trunks buried in flow material and found at the bottom of a small lake was used to reconstruct landslide activity. In addition, large subfossil tree trunks were sampled for tree-ring analysis. The radiocarbon dates indicate that most landslide activity in the area is recent (<600 BP). Two tree-ring-dated landslides were triggered by a large earthquake in AD 1663.

scholarly journals Tree-Ring Analysis of Intermediate Hawthorn (Crataegus media Bechst.) in NW Poland

Forests ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 29
Author(s):  
Anna Cedro ◽  
Bernard Cedro
Keyword(s):  
Tree Ring ◽  
Tree Rings ◽  
Agricultural Landscape ◽  
Positive Influence ◽  
Dominant Factor ◽  
Incremental Growth ◽  
High Precipitation ◽  
Ring Analysis ◽  
Uncultivated Land ◽  
Nw Poland

Intermediate hawthorn (Crataegus × media Bechst.) is broadly distributed in Europe but very rarely examined by dendrochronologists. In NW Poland, it is one of three naturally occurring hawthorn species, growing mainly at forest margins, along roads, in mid-field woodlots, and on uncultivated land. Biocenotically, it is a very valuable species. This study aimed to determine the age of trees, tree-ring dynamics, and growth–climate relationship for intermediate hawthorn. Signature years were also determined. Samples for analysis were collected from 22 trees growing in a typical agricultural landscape in a monospecific mid-field woodlot comprised of several hundred specimens of various ages and forms (shrubs and trees). Using classic methods of dendrochronological dating, a 40-year long chronology spanning 1981–2020 was constructed. The radial growth rate of intermediate hawthorn is comparable to other tree species forming stands in NW Poland and equals 2.41 mm/year. Considerable intersubject variability is noted, from 1.48 to 4.44 mm/year. The chronology was also used for dendroclimatological analyses, including correlation and response function and signature years. Of the meteorological parameters analyzed, annual incremental growth in hawthorn is the most strongly shaped by precipitation totals from May to August of the current vegetation year: high rainfall favors the formation of wide tree-rings. Statistically significant growth–climate relationships were also obtained for winter months (December of the preceding vegetation year, January and February), for which period negative correlation and regression values are noted for air temperature and insolation. Furthermore, high precipitation, low-temperature and low insolation late in the preceding vegetation year (especially in August) make a positive influence on the condition of trees in the upcoming growing season. Signature year analysis clearly pointed to precipitation as the dominant factor in shaping tree-rings in the studied hawthorn population. As there are no dendrochronological papers concerning indigenous hawthorn species, future studies should be expanded to include diverse geographic locations and habitat conditions and should include all three species of hawthorn occurring in Poland.

scholarly journals A novel computer-aided tree-ring analysis software (CATS): oak earlywood vessel size reveals a clear spring heat sum response

Trees ◽  
2017 ◽  
Vol 31 (5) ◽  
pp. 1683-1695 ◽  
Author(s):  
Alexander Land ◽  
Matthias Wehr ◽  
Kai-Uwe Roelfs ◽  
Simon Epkes ◽  
Daniel Reichle ◽  
...  
Keyword(s):  
Tree Ring ◽  
Analysis Software ◽  
Tree Ring Analysis ◽  
Vessel Size ◽  
Computer Aided ◽  
Earlywood Vessel ◽  
Ring Analysis

scholarly journals The 443-Year Tree-Ring Chronology for the Scots Pine from Upper Silesia (Poland) as A Dating Tool and Climate Proxy

2015 ◽  
Vol 42 (1) ◽  
Author(s):  
Magdalena Opała
Keyword(s):  
Tree Ring ◽  
Scots Pine ◽  
Meteorological Data ◽  
Ring Width ◽  
Tree Ring Chronology ◽  
Series Length ◽  
Upper Silesia ◽  
Living Tree ◽  
Absolute Dating ◽  
The Mean

Abstract An annually resolved and absolutely dated ring-width chronology spanning 443 years has been constructed using the historical and living-tree Scots pine samples from the Upper Silesia, south of Poland. The constructed regional chronology, based on six object chronologies, covers the period of 1568-2010. It is composed of 178 wood samples with the mean correlation of 0.51, mean series length of 104 years and mean EPS of 0.85. In total, 65 extreme years were distinguished. Their inde-pendent verification, based on the historical and meteorological data, showed significant correlation with the exceptionally cold/mild winters as well as severe droughts. The comparison of the extreme years with the other Polish pine chronologies showed similarities in the years with the anomalous winter conditions. Some extreme years can be associated with the exceptional pluvial conditions; these years are common in the Central European hydroclimatic tree-ring records. The construction of this regional pine chronology enables for the absolute dating of many architectural monuments from investigated region. The application of the new chronology for the dating of local wood can support interpretations of changes in the environment of the Upper Silesian region. In the future it can also be used as the basis for climate reconstruction.

scholarly journals Radiation densitometry in tree-ring analysis: a review and procedure manual

1985 ◽  
Author(s):  
M.L. Parker ◽  
F.G. Taylor ◽  
T.W. Doyle ◽  
B.E. Foster ◽  
C. Cooper ◽  
...  
Keyword(s):  
Tree Ring ◽  
Tree Ring Analysis ◽  
Ring Analysis
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