Principal Component and Cluster Analysis for determining diversification of bottom morphology based on bathymetric profiles from Brepollen (Hornsund, Spitsbergen)**The project was partly supported by The Polish Ministry of Sciences and Higher Education Grant No. N N525 350038.

Moskalik, Mateusz; Tęgowski, Jarosław; Grabowiecki, Piotr; Żulichowska, Monika

doi:10.5697/oc.56-1.059

Cited by 15 publications

(8 citation statements)

References 28 publications

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“…A steep transition slope was detected at the lower section of Brepollen, with a depth of 80–90 m in the centre of the bay, flanked by shallower sections of 60–70 m to the north‐east and 30–50 m to the south‐west of Hornbreen valley (Figure ). The overall U‐shaped profile of this part of the basin originates from past glacial activity (Moskalik et al ., ). In terms of its depth and morphology, this zone is split into two sections beyond the current Hornbreen terminus.…”

Section: Resultsmentioning

confidence: 97%

“…The retreat of Hornbreen and its former tributaries (Hyrnebreen, Storbreen, Svalisbreen, Mendeleevbreen and Chomjakovbreen) contributed to the creation of Brepollen, the inner part of the Hornsund Fjord (Figure (c)). The maximum depth of Brepollen exceeds 140 m in its central part, with shallow areas found in the bays formed by the glaciers termini (Moskalik et al ., , , b). Similarly, Hambergbukta bay formed on the eastern side of Hambergbreen as a result of its retreat (Figure (c)).…”

Section: Introductionmentioning

confidence: 99%

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Coast formation in an Arctic area due to glacier surge and retreat: The Hornbreen–Hambergbreen case from Spistbergen

Grabiec

Ignatiuk

Jania

et al. 2017

Earth Surf Processes Landf

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Glacierised coasts undergo faster geomorphic processes than unglaciated ones. We have studied changes of the coastal area in southern Svalbard with the glacier bridge between Torell Land and Sørkapp Land since the beginning of the 20th century. The existence of a continuous subglacial depression beneath the Hornbreen–Hambergbreen glacier system has been debated since the 1960s, with inconclusive results. In this study we assess both the subglacial topography and the bathymetry of Hornsund Fjord and Hambergbukta bay. This included ~40 km of radar surveys over the glacial system and sea depth sounding. The extent of the glaciers from maps and satellite images together with digital terrain models and surface elevation data based on GPS profiling were used to analyse geometry changes of the glacier surfaces. The results confirm the existence of a continuous subglacial depression below sea level (c. 40 m deep) between Hornsund and the Barents Sea. The Hornbreen‐Hambergbreen system has changed in shape over the past century, reflecting its dynamic origin and activity, also exemplified by the sequential surges identified since 1899. There was a pre‐surge build‐up event of Flatbreen causing a surge and subsequent lowering of the Hornbreen‐Hambergbreen frontal parts by the 1960s. After, the entire surface lowered, albeit with a delay in the Hornbreen terminal zone. Since the year 2000, Hornbreen terminus has retreated at an average rate of 106 m a−1; ~50% faster than that of Hambergbreen. If the retreat continues at the 2000–2015 average rate, the ice bridge between Hornsund and Hambergbukta will be broken sometime between 2055 and 2065 and the Hornsund strait will separate Sørkapp Land from the Spitsbergen island. The processes and events described in this study, particularly the effects of the glacier surge, may provide a model for changes likely to occur in other coastal glaciated regions experiencing rapid change. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Coast formation in an Arctic area due to glacier surge and retreat: The Hornbreen–Hambergbreen case from Spistbergen

Grabiec

Ignatiuk

Jania

et al. 2017

Earth Surf Processes Landf

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“…Bathymetry of Brepollen is also a clear re ection of glaciers' activity. According to previous works [16][17][18], eight various subbasins within the bay can be distinguished: 6 subaqueous valleys of present tidewater glaciers, central Brepollen subbasin and Treskelbukta subbasin ( Figure 1B). The maximum depth of over 100 m has been observed in the central basin, while depth measured in the Hornbreen's subaqueous valley reaches over 90 m ( Figure 1B).…”

Section: Study Areamentioning

confidence: 99%

Contemporary sedimentation in the forefield of Hornbreen,Hornsund

Staszek

Moskalik

2015

Open Geosciences

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Abstract:The paper presents a model of contemporary sedimentation in the fore eld of Hornbreen, tidewater glacier in Brepollen. The model is based on the results of grain-size analyses of bottom sediments and the information about dominant sedimentary processes in glaciated fjords. It is concluded that apart from the tidewater glacier which is the main source of sediment in this area, the material is transported also from the shores. Subsequently, the material is redeposited by iceberg-caused reworking, slides and gravity ows. Strong decreasing trend of particles' diameters with increasing distance from the ice cli is observed.

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“…Others have used general geomorphometric techniques to classify submarine landscapes (e.g. fjords (Moskalik et al, 2014a;Moskalik et al, 2014b), continental shelf and slope (Elvenes, 2013), and global (Harris et al, 2014); identify the various styles and scales of deformation across submarine landslides (Mountjoy et al, 2009); and infer the evolution of seamounts (Passaro et al, 2010), midocean ridge scarps (Mitchell et al, 2000), and faults in active continental margins (Kukowski et al, 2008). Figure 6.…”

Section: Marine Geomorphology Geophysics and Geohazardsmentioning

confidence: 99%

A review of marine geomorphometry, the quantitative study of the seafloor

Lecours

Dolan

Micallef

et al. 2016

Hydrol. Earth Syst. Sci.

178

120

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Abstract. Geomorphometry, the science of quantitative terrain characterization, has traditionally focused on the investigation of terrestrial landscapes. However, the dramatic increase in the availability of digital bathymetric data and the increasing ease by which geomorphometry can be investigated using geographic information systems (GISs) and spatial analysis software has prompted interest in employing geomorphometric techniques to investigate the marine environment. Over the last decade or so, a multitude of geomorphometric techniques (e.g. terrain attributes, feature extraction, automated classification) have been applied to characterize seabed terrain from the coastal zone to the deep sea. Geomorphometric techniques are, however, not as varied, nor as extensively applied, in marine as they are in terrestrial environments. This is at least partly due to difficulties associated with capturing, classifying, and validating terrain characteristics underwater. There is, nevertheless, much common ground between terrestrial and marine geomorphometry applications and it is important that, in developing marine geomorphometry, we learn from experiences in terrestrial studies. However, not all terrestrial solutions can be adopted by marine geomorphometric studies since the dynamic, fourdimensional (4-D) nature of the marine environment causes its own issues throughout the geomorphometry workflow. For instance, issues with underwater positioning, variations in sound velocity in the water column affecting acousticbased mapping, and our inability to directly observe and measure depth and morphological features on the seafloor are all issues specific to the application of geomorphometry in the marine environment. Such issues fuel the need for a dedicated scientific effort in marine geomorphometry.This review aims to highlight the relatively recent growth of marine geomorphometry as a distinct discipline, and offers the first comprehensive overview of marine geomorphometry to date. We address all the five main steps of geomorphometry, from data collection to the application of terrain attributes and features. We focus on how these steps are relevant to marine geomorphometry and also highlight differences and similarities from terrestrial geomorphometry. We conclude with recommendations and reflections on the future of marine geomorphometry. To ensure that geomorphometry is used and developed to its full potential, there is a need to increase awareness of (1) marine geomorphometry amongst scientists already engaged in terrestrial geomorphometry, and of (2) geomorphometry as a science amongst marine scientists with a wide range of backgrounds and experiences.

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Principal Component and Cluster Analysis for determining diversification of bottom morphology based on bathymetric profiles from Brepollen (Hornsund, Spitsbergen)**The project was partly supported by The Polish Ministry of Sciences and Higher Education Grant No. N N525 350038.

Cited by 15 publications

References 28 publications

Coast formation in an Arctic area due to glacier surge and retreat: The Hornbreen–Hambergbreen case from Spistbergen

Coast formation in an Arctic area due to glacier surge and retreat: The Hornbreen–Hambergbreen case from Spistbergen

Contemporary sedimentation in the forefield of Hornbreen,Hornsund

A review of marine geomorphometry, the quantitative study of the seafloor

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