Permafrost research in the granitic massifs of Southern Carpathians (Parâng Mountains)

Popescu, Răzvan; Vespremeanu‐Stroe, Alfred; Onaca, Alexandru; Cruceru, Nicolae

doi:10.1127/0372-8854/2014/0145

Cited by 19 publications

(20 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is consistent with the findings of Onaca et al (2017) in the southern Carpathian Mountains. According to Popescu et al (2015), rock glaciers located in granitic and granodioritic massifs are composed of larger clasts compared with those found in metamorphic massifs. Thus, the higher porosity of the substrata in granitic and granodioritic massifs allows for significant cooling beneath the bouldery mantle because the denser cold air is trapped between the large boulders (Balch, 1900).…”

Section: Lithological Controls On Rock Glaciersmentioning

confidence: 99%

“…Rock glacier research in China has, up to this point, focused principally on the Tian Shan Mountains (Cui and Zhu, 1989;Qiu, 1993;Zhu et al, 1996;Wang et al, 2017b), rather than on the rock glaciers of Daxue Shan on the south-eastern margins of the TP. This region has been, and continues to be, strongly uplifted and deformed due to the extrusion and collision of the Indian and Eurasian continental plates since the beginning of the Quaternary, and is therefore characterized by an extremely complex matrix of relations between different environmental factors such as climate and geomorphology.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Rock glaciers in Daxue Shan, south-eastern Tibetan Plateau: an inventory, their distribution, and their environmental controls

Ran

Liu

2018

The Cryosphere

View full text Add to dashboard Cite

Abstract. Rock glaciers are typical periglacial landforms. They can indicate the existence of permafrost, and can also shed light on the regional geomorphological and climatic conditions under which they may have developed. This article provides the first rock glacier inventory of Daxue Shan, south-eastern Tibetan Plateau. The inventory is based on analyses of Google Earth imagery. In total, 295 rock glaciers were identified in Daxue Shan, covering a total area of 55.70 km 2 between the altitudes of 4300 and 4600 m above sea level. Supported by ArcGIS and SPSS software programmes, we extracted and calculated morphometric parameters of these rock glaciers, and analysed the characteristics of their spatial distribution within Daxue Shan. Our inventory suggests that the lower altitudinal boundary for permafrost across the eight aspects of observed slopes differs significantly and that the lower altitudinal permafrost boundary is ∼ 104 m higher on western than eastern-facing slopes. Moraine-type and talus-derived rock glaciers exhibit mean gradients that are all concentrated within the 22-35 • range. However, lobate rock glaciers (27-45 • ) have a higher mean gradient than tongue-shaped rock glaciers (22-35 • ). Shady (i.e. N, NE, and E) slopes appear related to the presence of moraine-type rock glaciers, whereas sunny (i.e. W, SW, and S) slopes appear related to the presence of talus-derived rock glaciers. Rock glaciers in Daxue Shan are more concentrated within tertiary monzonitic granite, which is more sensitive than other lithological components to the freeze-thaw process. Continuous weathering of this substrate provides the ideal raw material for the rock glacier development. These results show that environmental controls (i.e. topographical, climatic, lithological factors) greatly affect the formation and development of rock glaciers. This study provides important data for exploring the relation between maritime periglacial environments and the development of rock glaciers on the south-eastern Tibetan Plateau (TP). It may also highlight the characteristics typical of rock glaciers found in a maritime setting.

show abstract

Section: Lithological Controls On Rock Glaciersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rock glaciers in Daxue Shan, south-eastern Tibetan Plateau: an inventory, their distribution, and their environmental controls

Ran

Liu

2018

The Cryosphere

View full text Add to dashboard Cite

show abstract

“…In the central part of the Parâng Mountains where the highest peaks, narrow crests and steep slopes are characteristic, the parent material is represented by hard rocks (granites and granodiorites), while at its periphery metamorphic and sedimentary rocks (quartzite and chlorite-sericite schist, limestones) are common (Popescu et al, 2015).…”

Section: Study Areamentioning

confidence: 99%

A century-long snow avalanche chronology reconstructed from tree-rings in Parâng Mountains (Southern Carpathians, Romania)

Pop

Gavrilă

Roşian

et al. 2016

Quaternary International

View full text Add to dashboard Cite

“…Overall morphology is represented by narrow ridges, glacial cirques and valleys etc., being the result of Pleistocene and Holocene glacial and periglacial activity. The pre-existing glacial and periglacial landforms are reshaped in the present-day by SA and DF geomorphic activity [7] and [1]. Above 1800 m a.s.l., the average annual temperature is below 2ᴼC and the precipitation amount is 1200 mm/year, leading to the development of alpine shrubs and alpine meadow.…”

Section: Study Areamentioning

confidence: 99%

“…The total surface of study area is 195.5 km 2 . In terms of lithology, magmatic rocks (granites and granodiorites) are widespread in the highest part of the mountains, while metamorphic and sedimentary rocks (amphibolite, crystalline schists, limestone) are common at its periphery [7]. Overall morphology is represented by narrow ridges, glacial cirques and valleys etc., being the result of Pleistocene and Holocene glacial and periglacial activity.…”

Section: Study Areamentioning

confidence: 99%

Spatial distribution and controlling factors of snow avalanche and debris flow in Parâng Mountains

Gavrilă¹,

Pop²,

Horváth³

et al. 2017

Proceedings of the 33rd Romanian Geomorphology Symposium

View full text Add to dashboard Cite

Abstract-The alpine slopes of Parâng Mts. are prone to snow avalanche (SA) and debris flow (DF) activity due to favorable lithological, topo-climatic and vegetation cover conditions. Since tourism activities are continuously increasing, tourists and related infrastructure in this area might be exposed to different levels of risk. Our study is a preliminary research that aims to analyze the spatial distribution and controlling factors of SA and DF processes in Parâng Mts., which represent natural hazards threating the areas destined for tourism activities and associated infrastructure. First, the spatial distribution pattern of SA paths and DF tracks was identified and mapped on orthophotoplans, then checked in the field and integrated in a database for analysis. Subsequently, a set of instability factors influencing directly the spatial distribution of SA and DF activity were analyzed. The following instability factors were taken into consideration and statistically analyzed using ArcGIS software: slope, altitude, aspect, planar and profile curvature (automatically extracted from 10 m resolution DEM), vegetation cover (mapped on orthophotoplans) and lithology (extracted from the geological maps at 1:200.000 scale). Information regarding the spatial distribution of tourist frequented areas and the related infrastructure (hiking trails, chalets, ski lifts, ski pistes etc.) were analyzed in conjunction with the spatial distribution of geomorphic process activity. In areas with tourism activities, future research will focus on mapping terrain susceptibility to SA and DF processes. Moreover, dendrogeomorphic reconstructions will allow to determine the occurrence probability of SA and DF activity, which will serve to finally get an accurate geomorphic hazard zonation within the study area.

show abstract

Permafrost research in the granitic massifs of Southern Carpathians (Parâng Mountains)

Cited by 19 publications

References 0 publications

Rock glaciers in Daxue Shan, south-eastern Tibetan Plateau: an inventory, their distribution, and their environmental controls

Rock glaciers in Daxue Shan, south-eastern Tibetan Plateau: an inventory, their distribution, and their environmental controls

A century-long snow avalanche chronology reconstructed from tree-rings in Parâng Mountains (Southern Carpathians, Romania)

Spatial distribution and controlling factors of snow avalanche and debris flow in Parâng Mountains

Contact Info

Product

Resources

About