Factors Controlling Terminus Position of Hansbreen, a Tidewater Glacier in Svalbard

Błaszczyk, Małgorzata; Jania, Jacek; Ciepły, Michał; Grabiec, Mariusz; Ignatiuk, Dariusz; Kolondra, Leszek; Kruss, Aleksandra; Luks, Bartłomiej; Moskalik, Mateusz; Pastusiak, Tadeusz; Walczowski, Waldemar; Wawrzyniak, Tomasz

doi:10.1029/2020jf005763

Cited by 15 publications

(17 citation statements)

References 118 publications

(234 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2). It has a 1.5 km wide calving terminus, total length of ∼15 km and an area of more than 50 km 2 (Błaszczyk andothers, 2009, 2013). The mean thickness and volume of the glacier are ∼170 m and 9.5 km 3 (Grabiec and others, 2012).…”

Section: Study Areamentioning

confidence: 99%

See 1 more Smart Citation

Distinguishing subaerial and submarine calving with underwater noise

Głowacki

2022

J. Glaciol.

View full text Add to dashboard Cite

Iceberg calving is one of the major mechanisms of ice loss from tidewater glaciers and ice sheets, but obtaining accurate estimates of ice discharge that are both continuous and accurate is a challenging task. Recent results have demonstrated the effective application of passive cryoacoustics – the use of naturally generated sounds to study the cryosphere – to quantify subaerial calving fluxes. However, little is known about the acoustic signatures of submarine calving. This study investigates the underwater noise from 656 subaerial and 162 submarine calving events observed at Hansbreen, Svalbard in the summers of 2016 and 2017. Statistical analysis of the acoustic signal shows that the normalized power of the calving noise is log-normally distributed regardless of the calving mode. However, submarine events can be distinguished from subaerial events by using the shape parameter of the log-normal distribution paired with the calving signal duration. The newly developed classification model may potentially be used for two purposes: (1) to study potential causal relationships between these two calving modes and (2) to separate calving fluxes into subaerial and submarine components. The latter will also require knowledge of the relationship between ice mass and sound spectral level for submarine calving events.

show abstract

Section: Study Areamentioning

confidence: 99%

“…The mean thickness and volume of the glacier are ~170 m and 9.5 km 3 (Grabiec and others, 2012). The typical water depth near the grounding zone and the average height of the ice cliff above the waterline are 60 and 38 m, respectively (Błaszczyk and others, 2021). Consequently, more than 60% of the terminus surface area is submerged.…”

Section: Study Areamentioning

confidence: 99%

Distinguishing subaerial and submarine calving with underwater noise

Głowacki

2022

J. Glaciol.

View full text Add to dashboard Cite

show abstract

“…Previous studies mostly analyzed the response of glaciers to climate change based on the hydrothermal combination and topographical conditions [37,38]. However, few researchers have integrated many geographical environmental factors to explore the compound effects on the glacier changes [39]. Therefore, higher-dimensional and finer-grained data were needed to support the analysis of spatio-temporal difference mechanism of the glacier changes.…”

Section: Environmental Parametersmentioning

confidence: 99%

Simulation of the Potential Distribution of the Glacier Based on Maximum Entropy Model in the Tianshan Mountains, China

Wang

Zhang

Liu

et al. 2021

Water

View full text Add to dashboard Cite

Under the background of global climate change, the variation in the spatial distribution and ice volume of mountain glaciers have a profound influence on regional economic development and ecological security. The development of glaciers is like biological succession; when climate change approaches or exceeds the threshold of suitable conditions for glacier development, it will lead to changes in potential distribution pattern. Therefore, from the perspective of the "biological" characteristics of glaciers, it is a beneficial exploration and attempt in the field of glaciology to explore its potential distribution law with the help of the niche model. The maximum entropy model (MaxEnt) can explain the environmental conditions suitable for the survival of things by analyzing the mathematical characteristics and distribution laws of samples in space. According to glacier samples and the geographical environment data screened by correlation analysis and iterative calculation, the potential distribution pattern of Tianshan glaciers in China in reference years (1970–2000) was simulated by MaxEnt. This paper describes the contribution of geographical environmental factors to distribution of glaciers in Tianshan Mountains, quantifies the threshold range of factors affecting the suitable habitat of glaciers, and predicts the area variation and distribution pattern of glaciers under different climate scenarios (SSP1-2.6, SSP5-8.5) in the future (2040–2060, 2080–2100). The results show that the MaxEnt model has good adaptability to simulate the distribution of glaciers. The spatial heterogeneity of potential distribution of glaciers is caused by the spatio-temporal differences of hydrothermal combination and topographic conditions. Among the environmental variables, precipitation during the wettest month, altitude, annual mean temperature, and temperature seasonality have more significant effects on the potential distribution of glaciers. There is significant spatial heterogeneity in the potential distribution of glaciers in different watersheds, altitudes, and aspects. From the forecast results of glacier in various climatic scenarios in the future, about 18.16–27.62% of the total reference year glacier area are in an alternating change of melting and accumulation, among which few glaciers are increasing, but this has not changed the overall retreat trend of glaciers in the study area. Under the low emission scenario, the glacier area of the Tianshan Mountains in China decreased by 18.18% and 23.73% respectively in the middle and end of the 21st century compared with the reference years and decreased by 20.04% and 27.63%, respectively, under the high emission scenario, which showed that the extent of glacier retreat is more intense under the high emission scenario. Our study offers momentous theoretical value and practical significance for enriching and expanding the theories and analytical methods of the glacier change.

show abstract

“…The Hornsund area in southern Spitsbergen (Svalbard) is the focus of wide glaciological [1][2][3][4], hydrological [5][6][7][8][9], snow [9], permafrost [10,11], geomorphometric [12][13][14] and biological [15] studies performed due to intensive alterations in the surveyed terrain. Digital mapping of such an environment and its related phenomena has become a fundamental requirement to keep track of all such alterations [16].…”

Section: Introductionmentioning

confidence: 99%

Combined Use of Aerial Photogrammetry and Terrestrial Laser Scanning for Detecting Geomorphological Changes in Hornsund, Svalbard

et al. 2022

Self Cite

View full text Add to dashboard Cite

The Arctic is a region undergoing continuous and significant changes in land relief due to different glaciological, geomorphological and hydrogeological processes. To study those phenomena, digital elevation models (DEMs) and highly accurate maps with high spatial resolution are of prime importance. In this work, we assess the accuracy of high-resolution photogrammetric DEMs and orthomosaics derived from aerial images captured in 2020 over Hornsund, Svalbard. Further, we demonstrate the accuracy of DEMs generated using point clouds acquired in 2021 with a Riegl VZ®-6000 terrestrial laser scanner (TLS). Aerial and terrestrial data were georeferenced and registered based on very reliable ground control points measured in the field. Both DEMs, however, had some data gaps due to insufficient overlaps in aerial images and limited sensing range of the TLS. Therefore, we compared and integrated the two techniques to create a continuous and gapless DEM for the scientific community in Svalbard. This approach also made it possible to identify geomorphological activity over a one-year period, such as the melting of ice cores at the periglacial zone, changes along the shoreline or snow thickness in gullies. The study highlights the potential for combining other techniques to represent the active processes in this region.

show abstract

Factors Controlling Terminus Position of Hansbreen, a Tidewater Glacier in Svalbard

Cited by 15 publications

References 118 publications

Distinguishing subaerial and submarine calving with underwater noise

Distinguishing subaerial and submarine calving with underwater noise

Simulation of the Potential Distribution of the Glacier Based on Maximum Entropy Model in the Tianshan Mountains, China

Combined Use of Aerial Photogrammetry and Terrestrial Laser Scanning for Detecting Geomorphological Changes in Hornsund, Svalbard

Contact Info

Product

Resources

About