Dendrogeomorphic reconstruction of past snow avalanche events in Bâlea glacial valley–Făgăraş massif (Southern Carpathians), Romanian Carpathians

Voiculescu, Mircea; Onaca, Alexandru; Chiroiu, Patrick

doi:10.1016/j.quaint.2015.11.115

Cited by 23 publications

(5 citation statements)

References 76 publications

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“…During the last decade, several tree-ring-based snow avalanche reconstructions (Table 2) have been undertaken in the Southern Carpathians (Voiculescu & Onaca, 2012;Meseșan et al, 2014;Pop et al, 2015;2017a;2017b;Chiroiu et al 2015;Voiculescu et al, 2016;Todea et al, 2020). Some of the event years reconstructed in the present paper were also found in other mountain ranges, such as the 1997 avalanche (in Parâng, Șureanu, and Piatra Craiului Mountains) and the 2005 avalanche (Parâng, Șureanu and Făgăraș Mountains).…”

Section: Snow Avalanche Reconstructionmentioning

confidence: 64%

“…Little information exists regarding the frequency, magnitude, and timing of these mountain-slope hazards due to the lack of archive data on past occurrences in the Romanian Carpathians (Voiculescu et al, 2016). Nevertheless, the occurrence and characteristics of past geomorphic processes on forested slopes can be deciphered using a tree-ring based approach.…”

Section: Introductionmentioning

confidence: 99%

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Active geomorphic hazards in the Sâmbăta Valley, Făgăraș Mountains (Romania): A tree-ring based approach

Chiroiu¹,

Onaca²,

Matica³

et al. 2022

Geographica Pannonica

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The present study addresses, for the first time, the problem of spatio-temporal reconstruction of geomorphic processes using tree-rings in the Sâmbăta Valley (Romanian Carpathians). The dendrogeomorphic analysis was conducted in two different sites, one affected by snow avalanches and the other by rockfall. A total number of 130 Picea Abies were sampled in the two sites. The results yield 13 major snow avalanches between 1950 and 2020 and a return period of 3.3 years. The winters with the highest activity index were 1988, 1997 and 2012. The rockfall reconstruction highlights several years of intense activity: 1952, 1955, 2003 and 2012. Thus, the results of the present study provide evidence of active geomorphic processes in the studied area, indicating that tourists are highly exposed to geomorphic hazards, as both sites interfere with popular hiking trails. (Because Sâmbăta Valley is one of the most intensely frequented by tourists in the Făgăraș Mountains, it is a need for warning signs to be installed on the exposed trails.

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Section: Snow Avalanche Reconstructionmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Active geomorphic hazards in the Sâmbăta Valley, Făgăraș Mountains (Romania): A tree-ring based approach

Chiroiu¹,

Onaca²,

Matica³

et al. 2022

Geographica Pannonica

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“…Tree‐ring‐based (dendrogeomorphic; Alestalo, 1971) methods have recently been proven to be a very good absolute dating approach regarding their temporal reach (up to one millennium; Zhang et al, 2019) and accuracy (several months; Stefanini, 2004) for past geomorphic process reconstruction. They have been successfully used for the spatiotemporal reconstruction of past debris flows (Bollschweiler et al, 2007; Šilhán et al, 2015), rockfalls (Perret et al, 2006; Trappmann et al, 2013), snow avalanches (Casteller et al, 2011; Voiculescu et al, 2016), landslides (Fantucci & McCord, 1995; Šilhán, 2020), floods (Ballesteros et al, 2017a, 2017b; Šilhán, 2012), and even erosion. The principle of dendrogeomorphic reconstruction of erosion is based on the dating of the moment of tree root exposure.…”

Section: Introductionmentioning

confidence: 99%

Recreationally created footpaths as a means of preserving specific biotopes of bare sand accumulations: Evidence provided by dendrogeomorphic reconstruction

Šilhán

Ružek

2022

Land Degrad Dev

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The combination of accumulation and erosion processes is the dominant geomorphic agent forming the surface of bare sand accumulations. These unique biotopes are gradually vanishing; thus, knowledge of their past dynamics is of crucial interest. This study focused on a selected locality with bare sand in the Borská Lowland (Slovakia).In total, nine buried individuals of Pinus sylvestris (L.) were used for the reconstruction

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“…Numerous studies used dendrochronological techniques to develop avalanche chronologies for remote regions without historical avalanche records or areas with inconsistent avalanche observations (Butler and Malanson, 1985a;Germain et al, 2009;Reardon et al, 2008;Šilhán and Tichavský, 2017;Voiculescu et al, 2016), and many studies used these techniques to examine avalanches across space and time (Table 1).…”

Section: Introductionmentioning

confidence: 99%

A regional spatio-temporal analysis of large magnitude snow avalanches using tree rings

Peitzsch¹,

Hendrikx²,

Stahle³

et al. 2020

Preprint

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Abstract. Snow avalanches affect transportation corridors and settlements worldwide. In many mountainous regions, robust records of avalanche frequency and magnitude are sparse or non-existent. However, dendrochronological methods can be used to fill this gap and infer historic avalanche patterns. In this study, we developed a tree-ring based avalanche chronology for large magnitude avalanche events using dendrochronological techniques for a sub-region of the northern United States Rocky Mountains. We used a strategic sampling design to examine avalanche activity through time and across nested spatial scales (i.e. from individual paths, four distinct sub-regions, and the region). We analysed 673 total samples from 647 suitable trees collected from 12 avalanche paths, from which 2,134 growth disturbances were identified over years 1636 to 2017 Common Era (C.E.). Using existing indexing approaches, we developed a regional avalanche activity index to discriminate avalanche events from noise in the tree-ring record. Large magnitude avalanches common across the region occurred in 30 individual years and exhibited a median return interval of approximately three years (mean = 5.21 years). The median large magnitude avalanche return interval (3–8 years) and the total number of avalanche years (12–18) vary throughout the four sub-regions, suggesting the important influence of local terrain and weather factors. We tested subsampling routines for regional representation, finding that sampling eight random paths out of a total of 12 avalanche paths in the region captures up to 83 % of the regional chronology, whereas four paths capture only 43 % to 73 %. The greatest value probability of detection for any given path in our dataset is 40 % suggesting that sampling a single path would capture no more than 40 % of the regional avalanche activity. Results emphasize the importance of sample size, scale, and spatial extent when attempting to derive a regional large magnitude avalanche event chronology from tree-ring records.

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Dendrogeomorphic reconstruction of past snow avalanche events in Bâlea glacial valley–Făgăraş massif (Southern Carpathians), Romanian Carpathians

Cited by 23 publications

References 76 publications

Active geomorphic hazards in the Sâmbăta Valley, Făgăraș Mountains (Romania): A tree-ring based approach

Active geomorphic hazards in the Sâmbăta Valley, Făgăraș Mountains (Romania): A tree-ring based approach

Recreationally created footpaths as a means of preserving specific biotopes of bare sand accumulations: Evidence provided by dendrogeomorphic reconstruction

A regional spatio-temporal analysis of large magnitude snow avalanches using tree rings

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