Zbyněk Engel

Zbyněk Engel
Charles University in Prague | CUNI · Department of Physical Geography and Geoecology

PhD

About

88
Publications
19,488
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,302
Citations
Citations since 2017
26 Research Items
755 Citations
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
2017201820192020202120222023020406080100120140
Additional affiliations
January 2008 - present
Position
  • Charles University in Prague
March 2004 - present
Charles University in Prague
Position
  • Senior lecturer at the Department of Physical Geography and Geoecology

Publications

Publications (88)
Presentation
Full-text available
We present a new dataset of summer precipitaiton on James Ross Island, Antarctica. The observations were compared to the WRF model output in 300 m horizontal resolution. Special attention was given to synoptic-scale framing of high-precipitation events and modelled preciptitation distribution in complex terrain of northern James Ross Island.
Article
Full-text available
The retreat rates of Triangular Glacier since 1979 and its mass changes during the period 2014/15–2019/20 indicate the sensitive response of small ice masses on the eastern side of the Antarctic Peninsula to air temperature evolution. This cirque glacier in the northern part of James Ross Island receded rapidly during the period of regional warming...
Article
An extensive debris flow occurred, in the Smutná valley, Western Tatra Mts. in Slovakia on 15 May 2014. The aim of this study is to describe the morphology of the observed debris flow and to evaluate the conditions that preceded its formation as well as the previous activity of debris flows on this path. The observed debris flow is among the most e...
Article
This study aims to assess the role of ephemeral snow cover on ground thermal regime and active layer thickness in two ground temperature measurement profiles on the Circumpolar Active Layer Monitoring Network – South (CALM-S) JGM site on James Ross Island, eastern Antarctic Peninsula during the high austral summer 2018. The snowstorm of 13–14 Janua...
Article
Full-text available
This study presents a 1:25 000 geomorphological map of the northern sector of Ulu Peninsula, James Ross Island, Antarctic Peninsula. The map covers an area of c. 250 km2, and documents the landforms and surficial sediments of one of the largest ice-free areas in Antarctica, based on remote sensing and field-based mapping. The large-scale landscape...
Data
This study presents a 1:25 000 geomorphological map of the northern sector of Ulu Peninsula, James Ross Island, Antarctic Peninsula. The map covers an area of c. 250 km2, and documents the landforms and surficial sediments of one of the largest ice-free areas in Antarctica, based on remote sensing and field-based mapping. The large-scale landscape...
Article
During the last glacial maximum the Cordilleran and Laurentide ice sheets coalesced east of the Rocky Mountains and geomorphological evidence indicates ice flowed over the main ridge of the Rocky Mountains between ~54–56°N. However, this ice flow has thus far remained unconstrained in time. Here we use in situ produced cosmogenic ¹⁰ Be dating to de...
Preprint
Full-text available
This study aims to assess the role of ephemeral snow cover on ground thermal regime and active layer thickness in two ground temperature measurement profiles on the Circumpolar Active Layer Monitoring Network – South (CALM-S) JGM site on James Ross Island, eastern Antarctic Peninsula during the high austral summer 2018. The snowstorm of 13–14 Janua...
Article
Patterned‐ground landforms represent the most common phenomenon of periglacial environment, and their large sorted forms belong to the few morphological indicators of past permafrost distribution. The relic forms of patterned ground are widespread on high‐elevated surfaces in the central European uplands, providing the evidence of regional periglac...
Article
Coarse debris accumulations cover large areas in high latitude and mountain environments, but their age and origin remain mostly unknown. Here we reassess the morphology of a prominent coarse debris accumulation in the Sudetes Mountain range in central Europe and constrain its timing with ¹⁰Be surface exposure data. Our observations indicate that t...
Article
Full-text available
High latitude dust (HLD) depositions on four glaciers of James Ross Island (the Ulu Peninsula) were analysed. The deposition rate on the selected glaciers varies from 11.8 to 64.0 g/m 2 , which is of one order of magnitude higher compared to the glaciers in Antarctica or elsewhere in the world. A strong negative relationship between the sediment am...
Article
Full-text available
Patterned ground in mountainous areas has a high palaeogeographic significance as it is associated with cold environments and frequently with permafrost conditions. Most patterned ground (i.e. sorted polygons, sorted nets, sorted stripes) in the High Sudetes is overgrown by vegetation and is relict. However, wind-blown summit areas with low snow co...
Article
Full-text available
This study presents surface mass balance of two small glaciers on James Ross Island calculated using constant and zonally-variable conversion factors. The density of 500 and 900 kg·m-3 adopted for snow in the accumulation area and ice in the ablation area, respectively, provides lower mass balance values that better fit to the glaciological records...
Article
Full-text available
This study summarizes the current state of the active layer and permafrost research on James Ross Island. The analysis of climate parameters covers the reference period 2011-2017. The mean annual air temperature at the AWS-JGM site was-6.9°C (ranged from-3.9°C to-8.2°C). The mean annual ground temperature at the depth of 5 cm was-5.5°C (ranged from...
Article
Glaciers of the Svalbard archipelago react very rapidly to climate change in the polar environment. Combining the study of aerial photographs, digital elevation models and in situ measurements, it is possible to measure glacier geometric changes. Apart from the standard remote sensing data evaluation we focus on in situ measurements by ground penet...
Article
Full-text available
The long-term warming on the Antarctic Peninsula in the second half of the 20th century prompted rapid retreat of glaciers on the peninsula and surrounding islands. Retreat accelerated until the beginning of the new millennium when the regional warming trend significantly decreased. The response of glaciers to the change in temperature trend has be...
Article
Full-text available
The formation and development of glacial lakes in mountainous regions is one of the consequences of glacier recession. Such lakes may drain partially or completely when the stability of their dams is disturbed or as a consequence of impacts. We present a case study from the Central Asian mountain range of Tien Shan – a north-oriented tributary of t...
Article
Full-text available
Ore mining and processing in semi-arid areas is responsible for the generation of metal(loid)-containing dust, which is easily transported by wind to the surrounding environment. To assess the human exposure to dust-derived metal(loid)s (As, Cd, Cu, Pb, Sb, Zn), as well as the potential risks related to incidental dust ingestion, we studied mine ta...
Article
Full-text available
A pair of juvenile emperor penguins (Aptenodytes forsteri) was observed in the northern coast of James Ross Island, the north-western sector of the Weddell Sea, Antarctica, in January 2017. The penguins originated from the colony located on Snow Hill Island, 120-130 km far from the observation area. Despite the emperor penguin´s ability to migrate...
Preprint
A pair of juvenile emperor penguins (Aptenodytes forsteri) was observed in the northern coast of James Ross Island, the north-western sector of the Weddell Sea, Antarctica, in January 2017. The penguins originated from the colony located on Snow Hill Island, 120-130 km far from the observation area. Despite the emperor penguin´s ability to migrate...
Article
Full-text available
Two small glaciers on James Ross Island, the north-eastern Antarctic Peninsula, experienced surface mass gain between 2009 and 2015 as revealed by field measurements. A positive cumulative surface mass balance of 0.57 ± 0.67 and 0.11 ± 0.37 m w.e. was observed during the 2009–2015 period on Whisky Glacier and Davies Dome, respectively. The results...
Article
Full-text available
Hanáček, M., Nývlt, D., Skácelová, Z., Nehyba, S., Procházková, B. and Engel, Z. 2018. Sedimentary evidence for an ice-sheet dammed lake in a mountain valley of the Eastern Sudetes, Czechia. Acta Geologica Polonica, 68 (1), 107-134. Warszawa. An accumulation of glacial sediments is located near Písečná village in the depression between the Sokol Ri...
Article
A small ice-dammed lake, which developed along the margin of Nordenskiöldbreen on the northern coast of Adolfbukta, (central Spitsbergen, Svalbard) has been studied by a combination of facies analysis, ground penetrating radar, analysis of photos and satellite imagery, and by surface mapping by Unmanned Aerial Vehicle (drone). The lake existed betw...
Article
Be exposure ages from moraines and bedrock sites in the Roháčská Valley provide chronology of the last glaciation in the largest valley of the Western Tatra Mts., the Western Carpathians. The minimum apparent exposure age of 19.4 ± 2.1 ka obtained for the oldest sampled boulder and the mean age of 18.0 ± 0.8 ka calculated for the terminal moraine i...
Article
The Jizerské hory Mountains in the Czech Republic have traditionally been considered to be a highland that lay beyond the limits of Quaternary glaciations. Recent work on cirque-like valley heads in the central part of the range has shown that niche glaciers could form during the Quaternary. Here we report geomorphological and sedimentary evidence...
Article
Sackungen represents a common mode of deep-seated rock-slope failures in alpine landscapes, but proof of their temporal and causal relationship to extrinsic factors such as climatic changes, glacier retreat or seismic activity remains elusive. Based on the terrestrial cosmogenic nuclide (TCN) dating of 18 sackung scarps supported by one radiocarbon...
Article
Full-text available
The Žulová Upland is composed of granitoids of the Žulová batholith with relicts of Pleistocene (Elsterian) continental glaciation sediments. The investigated outcrop represents development of glacigenic sediments on rugged topography of the Žulová Upland. Investigated locality is situated on a hill located on the northern margin of the Žulová Upla...
Conference Paper
Full-text available
The study of the thermal behaviour of permafrost and active layer at the South Shetland Islands, on the western side of the Antarctic Peninsula (Antarctica) has been our research topic since 1991, and mainly since 2006 when we established different active layer thickness and ground thermal monitoring sites of the Circumpolar Active Layer Monitoring...
Conference Paper
Full-text available
Antarctic Peninsula (AP) region is considered the most rapidly warming part of Antarctica. Changes of air temperature have a significant effect on cryosphere components, including permafrost and active layer. From that perspective, AP region provides a unique environment to understand the impacts of climate change on permafrost and related ecosyste...
Article
The response of active-layer thickness and the ground thermal regime to climatic conditions on the Ulu Peninsula (James Ross Island, northeastern Antarctic Peninsula) in 2011–13 is presented. The mean air temperature over this period was –8.0°C and ground temperature at 5 cm depth varied from –6.4°C (2011–12) to –6.7°C (2012–13). The active-layer t...
Article
10Be exposure age chronology of the last glaciation was established in a key area at the southern slopes of the High Tatra Mts., Western Carpathians. In-situ produced 10Be in moraine boulders, glacially transformed bedrock surfaces and rockfall accumulations constrains the timing of the Last Glacial Maximum (LGM) glacier expansion and provides chro...
Article
The fluvial system of the Litavka River in the Czech Republic has been severely polluted by polymetallic ore mining and smelting that occurred mainly between the 1780s and 1970s. To decipher the mechanisms of the pollution transport pathways, we analysed river valley sediments from river headwaters upstream from the ore district through mining and...
Article
Full-text available
10Be exposure age chronology of the last glaciation was established in a key area at the southern slopes of the High Tatra Mts., Western Carpathians. In-situ produced 10Be in moraine boulders, glacially transformed bedrock surfaces and rockfall accumulations constrains the timing of the Last Glacial Maximum (LGM) glacier expansion and provides chro...
Article
The Northern Prince Gustav Ice Stream located in Prince Gustav Channel, drained the northeastern portion of the Antarctic Peninsula Ice Sheet during the last glacial maximum. Here we present a chronology of its retreat based on in situ produced cosmogenic 10Be from erratic boulders at Cape Lachman, northern James Ross Island. Schmidt hammer testing...
Article
Uranium mining and processing in the watershed of the Ploučnice River in the Czech Republic during a well-defined time interval (1969-1989) allowed for a study of pollutant fates in sediments of a meandering river that is otherwise in a nearly natural state. A considerable part of the primary pollution is present in hotspots in the floodplain 10-15...
Conference Paper
Full-text available
Recent climate changes affect natural environment around the world and cryosphere in particular. One of the most sensitive parts of cryosphere is the permafrost and the active layer. It’s estimated that the atmospheric warming should have a huge impact on the permafrost distribution and active layer properties. In contrast to numerous monitoring si...
Article
Full-text available
This study calculates area, volume and elevation changes of two glaciers on James Ross Island, Antarctica, during the period 1979–2006. Davies Dome is a small ice cap. Whisky Glacier is a valley glacier. Ground-penetrating radar surveys indicate ice thickness, which was used for calculations of the bed topography and volume of both glaciers. Maximu...
Article
Full-text available
A combination of remotely sensed data, field mapping, bathymetric survey and geophysical soundings is used to describe the recent changes in the terminal area of Petrov glacier, the largest glacier in the Akshiirak massif, central Tien Shan. According to our results, three periods of accelerated glacier retreat (1977–80, 1990–95 and 2008–09) can be...
Article
Full-text available
In this study, surface mass balance data of two glaciers on James Ross Island, Antarctica, and its spatial and temporal variations are evaluated using snow ablation stakes, ground-penetrating radar, and dGPS measurements. The investigated glaciers are located on the Ulu Peninsula, northern part of James Ross Island. Davies Dome is an ice dome, whic...
Article
Shape and size characteristics of cirques and their changes and mutual relationships include not only spatial and descriptive aspects but also genetic attributes. The goals of this article were to define an application of k-curve (sensu Haynes, 1968) that describes the extent of cirque overdeepening and to identify k-curve equation input variables....
Article
Full-text available
This study presents a new finding of glaciofluvial sediments filling a buried channel in the Anděl Col (522 m a.s.l.) in the Jizera Mts., on the Czech-Polish border. At least 550 m long and 55–100 m wide channel filled by glaciofluvial sediments was determined by geophysical methods in the lowermost part of the col. The base of the channel was foun...
Chapter
Full-text available
This chapter brings a review of current evidences of continental and mountain glaciation in Czechia and provides a closer look at the mid Pleistocene (Elsterian and Saalian) continental glaciation limits and chronology from northern part of the country, as well as late Pleistocene mountain glaciations in the Krkonoše and Šumava Mountains.
Article
Full-text available
Continuous heavy rainfall hit northern Peru in the second half of the 2008/2009 summer season. From the end of January to the beginning of March, the Cordillera Huayhuash experienced abnormally high precipitations that exceeded 270mm. The antecedent rainfall, aggravated with a severe rainstorm of 20mm on March 7 triggered a large debris flow in the...
Article
Global climate variability is a well-documented fact; however, the human contribution to climate change is now being vigorously debated. Therefore, a better understanding of past natural climate variability may help to establish the actual anthropogenic contribution to the observed climatic trend. A variety of high-resolution proxies now exist for...
Article
Full-text available
Exposure ages and relative-age data are presented from eight sites in the Łomnica and Łomniczka valleys to provide essential information for reconstructing local glaciation chronology. A combination of 10Be exposure ages and Schmidt hammer data obtained for moraines indicate relatively short period of glacier accumulation lasting from 17.0±0.4 ka t...
Article
Full-text available
The source of the world's largest river has fascinated scientists and adventurers for a long time. Extensive studies have been undertaken in the unexplored Llogueta River valley, Cordillera Chila, to identify the main stream of the Amazon River. Analysis of the Lloqueta River network and measurements of its hydrographic and hydrometric characterist...
Article
This study presents rock strength variations at granite outcrops and in subsurface vertical profiles in the Jizerské hory Mountains, Czech Republic. Schmidt hammer rebound values in subsurface profiles change gradually from the bedrock surface downward. An exponential relation has been observed between the R-values and depth in rock outcrops to a d...
Article
More than 2000 of mountain lakes covering more than 0.1 ha exist in a territory of Kyrgyzstan. Nearly 20% of them are dangerous because of instability of lake dams, frequent overflows and melting of buried ice inside the moraine dams. According to the Kyrgyz lake inventory, 328 lakes are at risk of outburst and 12 lakes are considered as actually d...
Article
Full-text available
Antarctic Peninsula is one of the regions, which have been exposed to the most rapid warming of the Earth since 1950. Consequences of climate changes are clearly documented by recent disintegration of ice shelves on both sides of the Antarctic Peninsula as well as by the retreat of land-based glaciers. James Ross Island, located close to the northe...
Article
Full-text available
This study presents detailed lithostratigraphy and stable carbon and nitrogen isotopic variations in a 520-cm-long sediment core from a cirque basin in the Labský důl Valley, Krkonoše Mountains, Czech Republic. Detailed study of the core reveals five major periods of sedimentation during the last 7600years: silt and sand deposition during ~7.6–5.1k...
Article
The summit areas of the High Sudetes are unique relief and landscape within the Bohemian Massif for their composition of fossil and active periglacial landforms. Jeník & Sekyra (1995) knew it and defined a model of artic-alpine tundra in the Giant Mts. It is certain that permafrost has not large area expansion in the High Sudetes. It can not be exc...
Article
About 750 examples of patterned ground forms at 25 sites in the High Sudetes mountains (Czech Republic) were classified using morphometric characteristics and environmental parameters. Simple parameters such as length, width and height of patterned ground were measured in the field, with additional variables of elevation, intensity of deflation and...
Article
Full-text available
An interdisciplinary study of glacier-related hazards in the Petrov lake region (Ak-Shiirak Range, the Inner Tien-Shan, Kyrgyzstan) has been undertaken to identify potential dangers to the area. A cooperative effort from experts in the fields of hydrology, glaciology, geomorphology and geophysics has been employed in this study. For the hazard asse...
Article
Full-text available
The decrease of granite surface strength in the Krkonoše Mountains (Czech Republic) since the Lateglacial Period is estimated using the Schmidt hammer method combined with existing 10Be exposure-age dates. The dating techniques are used together to obtain absolute-age estimates that refer to temporal changes in the rock hardness. Cosmogenic nuclide...
Article
Full-text available
It is evident that morphology and location of the patterned ground of the High Sudetes are significantly dependent on lithological conditions. Additional impact has also extreme location, respectively extend of its deflation. The occurrence of sorted polygons is dependent particularly on quartzite; earth hummocks prefer rocks offering fine-grained/...
Article
Full-text available
Geomorphological observations of the continental ice sheets trim line in the northern part of the Jizerské hory Mountains have been done. The research aims to investigate possibilities of selected techniques in determination of glacial landscape. Continental ice sheets trimline could be reconstructed using comparative analysis of rock weathering va...