Ice volume changes (1936–1990–2007) and ground-penetrating radar studies of Ariebreen, Hornsund, Spitsbergen

Lapazaran, Javier; Pętlicki, Michał; Navarro, Francisco; Machío, Francisco; Puczko, Darek; Głowacki, Piotr; Nawrot, A.

doi:10.3402/polar.v32i0.11068

Cited by 16 publications

(13 citation statements)

References 19 publications

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“…In the interpolation, two different techniques available in ESRI ArcGIS 10.1 software were tested: Topo to Raster tool based on the ANUDEM algorithm, considered to be the most effective for creating hydrologically correct raster surface (Hutchinson 1989), and TIN to Raster tool -a linear interpolation triangulation procedure and Triangulated Irregular Network conversion to a 20 m x 20 m regular grid. The efficiency of both methods for glaciological research has been shown by numerous authors (Kohler et al 2007;Barrand et al 2010;Nuth et al 2010;Lapazaran et al 2013). The latter method gave superior results and is used here.…”

Section: Methodsmentioning

confidence: 79%

Landscape transformation under the Gåsbreen glacier recession since 1899, southwestern Spitsbergen

Ziaja¹,

Dudek²,

Ostafin³

2016

Polish Polar Research

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Landscape changes of the Gåsbreen glacier and its vicinity since 1899 are described. Maps at 1:50 000 scale of changes of the glacier's elevation and extent for the periods 1938-1961, 1961-1990, 1990-2010, and 1938-2010 are analyzed in comparison with results of the authors' field work in the summer seasons 1983, 1984, 2000, 2005 and 2008. During all the 20th century, the progressive recession of the glacier revealed in a dramatic decrease in the thickness of its lower part, with a small reduction of its area and length. However, further shrinkage produced significant shortening and reduction in area which resulted in final decline of the Goësvatnet glacial dammed lake in 2002. Hence, the lowest (and very thick, up to 150-160 m) part of the former glacier tongue and dammed lake were transformed into a new terraced river valley south of the glacier and a typical marginal zone with glacial landforms north of the glacier. Since 1961, the equilibrium line altitude of the Gåsbreen glacier has risen from ca 350 to ca 500 m a.s.l. and now is located below the very steep rocky walls of the Mehesten mountain ridge, 1378 m a.s.l. Hence, the glacier is being fed by snow avalanches from these rocky walls and much more snow melts during the warmer summer seasons, stimulating a quicker recession of the lowest part of the glacier. This recession may be stopped only by significant climate cooling or increase in snow.

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Section: Methodsmentioning

confidence: 79%

Landscape transformation under the Gåsbreen glacier recession since 1899, southwestern Spitsbergen

Ziaja¹,

Dudek²,

Ostafin³

2016

Polish Polar Research

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“…Nuth and others, 2013), and has been reported for both the tidewater (Blaszczyk and others, 2013) and land-terminating glaciers (e.g. Lapazaran and others, 2013) of Hornsund.…”

Section: Study Areamentioning

confidence: 75%

Calving of a tidewater glacier driven by melting at the waterline

et al. 2015

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ABSTRACT. We present a study of the development of a thermo-erosional notch at the waterline and its influence on calving of Hansbreen, a medium-sized grounded tidewater glacier in southern Svalbard. The study is based on the results of undercut notch melt modelling, based on measurements of sea-water properties, repeated terrestrial laser scans and analysis of time-lapse camera images. There is a strong correlation between observed calving activity and modelled melt rate of the undercut notch. Measured depths of the undercut reach 4 m and vary greatly over time. The calving activity of Hansbreen was significantly lower in 2011 than in 2012, due to the persistent presence of the ice pack in Hornsund fjord, which cooled the sea surface and suppressed the wave action. Calving on Hansbreen is controlled by a local imbalance of forces at the front, due to thermo-erosional undercutting at the sea waterline. Calving activity is therefore sensitive to changes in sea-water temperature and wave height. It may be expected that calving rates will rise with increased advection of warm oceanic water to the Arctic.

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“…Whereas, during the whole research period the slowing of this process reached only 5 ha in period 1973-1990 and average recession 3.7 ha per year in the years 1990-2013. The changes of glacier's areas and their front recession is observed in whole Svalbard, e.g another valley glacier located in southern Spitsbergen -Ariebreen [17] and others [18].…”

Section: Discussionmentioning

confidence: 99%

Front of the Werenskiold Glacier (Svalbard) – changes in years 1957–2013

et al. 2018

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Abstract. Werenskiold Glacier in the Isle of Spitsbergen is one of the polygons on which evaluation of the rate of glacier recession is performed. Location of the glacier front is precisely presented in the specialist literature since the mid. 30. of 20th century. Article presents results of studies about changes in the position of Werenskiold Glacier based on selected archival data and own research conducted in 2012-2013. The initial location of the glacier front was described by the topographical map in the scale 1:5000 elaborated in the year 1961 on the basis of data from the years 1957-1959 by the Polish Army Topographic Service. Moreover, as comparative data on location of glacier front in the later years there were applied results of photogrammetrical images from the year 1973 and a orthophotomap from 1990. These data together with the author's GPS measurements were transformed into the uniform coordinate system. Thus, prepared data made it possible to evaluate the rate of recession of Werenskiold Glacier front in the three epochs from the years 1957-2013. It was found that during the 56 years the glacier front was moved by ca. 1200 m, which gives the mean recession value of 25 m/year as well as the mean yearly loss of the glacier surface of the order of 5 ha.

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Ice volume changes (1936–1990–2007) and ground-penetrating radar studies of Ariebreen, Hornsund, Spitsbergen

Cited by 16 publications

References 19 publications

Landscape transformation under the Gåsbreen glacier recession since 1899, southwestern Spitsbergen

Landscape transformation under the Gåsbreen glacier recession since 1899, southwestern Spitsbergen

Calving of a tidewater glacier driven by melting at the waterline

Front of the Werenskiold Glacier (Svalbard) – changes in years 1957–2013

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