ICE Thickness Using Ground Penetrating Radar at Znosko Glacier on King George Island

Bello, Cinthya; Santillán, Nelson; Cochachín, Alejo; Arias, Sandro; Suárez, Wilson

doi:10.1109/lagirs48042.2020.9165584

Cited by 9 publications

(6 citation statements)

References 7 publications

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“…Recent researchers have analysed the Antarctica climate variability and observed that temperatures trends are asymmetric in time and space; a significant warming has been observed in the Antarctic Peninsula (AP) and West Antarctica contrasting with no significant trends over most of the continent (Falk et al, 2013;Turner et al, 2014;Pudełko et al, 2018;Jones et al, 2019;Bello et al, 2020). This phenomenon is attributed to changes in the Southern Annular Mode (SAM), the main driver of climate variability in the Southern Hemisphere, and to El Niño-Southern Oscillation (ENSO) (Marshall, 2003;Turner, 2004;Marshall et al, 2006;Abram et al, 2014;Clem et al, 2016) impacting on several cryospheric components in the region.…”

Section: Introductionmentioning

confidence: 99%

Trends and space–time patterns of near‐surface temperatures on Maxwell Bay, King George Island, Antarctica

Bello

Suárez

Lavado‐Casimiro

2022

Intl Journal of Climatology

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There is growing interest in the international scientific community in characterizing climate variability in Antarctica because of the continent's fundamental role in regulating the world's climate. Researchers have intensively studied the Antarctic Peninsula since the warming that began in the mid-1950s. This was followed by a subsequent cooling period over the last decades. For this paper, using the available data, we analysed the variability in surface air temperatures at five meteorological stations located on King George Island (KGI) (a subantarctic island that is part of the South Shetland Islands); we also investigated the relationships between the air temperatures and large-scale atmospheric patterns from 1968 to 2019. In this study we found that summer temperatures are above 0 C from December to March and close to melting temperatures (extreme values) in spring and autumn; consequently, a small increase in temperature can have a significant impact on the cryosphere. The statistical analysis of the mean temperatures confirmed a trend toward cooling during the summer and in the mean monthly maximum temperatures over the 1990s at most of the weather stations whose data we analysed. Analysing the teleconnection patterns showed that the Southern Annular Mode (SAM) had strong, direct, and positive correlations during the autumn and less strong connections in spring, winter, and on an annual scale. Furthermore, we observed a lesser influence of El Niño-Southern Oscillation (ENSO).

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Section: Introductionmentioning

confidence: 99%

Trends and space–time patterns of near‐surface temperatures on Maxwell Bay, King George Island, Antarctica

Bello

Suárez

Lavado‐Casimiro

2022

Intl Journal of Climatology

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“…Compared to traditional methods of cave surveying [39], current geodetic technologies provide a much wider range of methods and instruments, from classical speleological methods [40,41], through surveying technologies such as digital tacheometry, terrestrial laser scanning, digital photogrammetry, and Simultaneous Localization And Mapping (SLAM) [22,25,[42][43][44], to geophysical methods such as microgravimetry, seismometry, or ground penetrating radar [45,46]. All of these technologies have different applicability and suitability and provide different results.…”

Section: Methodsmentioning

confidence: 99%

Cross-Polarized SfM Photogrammetry for the Spatial Reconstruction of Challenging Surfaces, the Case Study of Dobšiná Ice Cave (Slovakia)

Bartoš,

Pukanská,

Kseňak

et al. 2023

Remote Sensing

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Geodetic methods are integral to mapping surface and subsurface objects and phenomena. Modern geodetic technologies such as laser scanning and digital photogrammetry have also become a standard part of the mapping and documentation of cave spaces. In some cases, these technologies cannot accurately capture the measured surface and thus provide reliable data. One such example is the ice with specific surface characteristics in caves with ice deposits. One of the world’s most studied ice caves is the Dobšiná Ice Cave (Slovakia), which has undergone significant changes in the ice-filling area and volume in recent years. To monitor and analyze all these changes properly, we need to know the surface and volume of this ice mass and monitor it regularly. Where modern geodetic methods such as terrestrial laser scanning (TLS) or digital photogrammetry may fail due to the ice’s physical properties, we propose using cross-polarized Structure-from-Motion (SfM) photogrammetry. As a case study, this method was used in a 28 m long ice tunnel in this cave. Two polarizing filters (on the flash as a light source and on the camera lens) were used in 90° rotation to each other to achieve the cross-polarization effect and remove surface reflections. This removed the surface reflections, giving us a compact and accurate point cloud of the entire tunnel. The dense cloud from cross-polarized (CP) photogrammetry is denser and more compact and does not contain as many outliers and noise points when compared to non-cross-polarized (non-CP) photogrammetry. The TLS point cloud covers the entire surface of the tunnel without significant holes; however, the penetration of the beam through the ice makes such a cloud unusable. Only the cloud from CP photogrammetry covers the entire surface of the tunnel densely enough without additional noise. This methodology can then be used in other parts of the cave or other geomorphological applications to suppress reflections so high-quality results for further processing and analysis can be obtained.

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“…The development of GPR surveys has been accompanied by separate aerial UAV surveys of the same area in some projects in the Antarctic to provide, for instance, a more complete assessment of ice volumes and surface topography [82,109,111]. Although the integration of GPR sensors in UAV platforms is already technically available, their use in cryosphere studies is still limited to few surveys in the Arctic, namely to measure snowpack properties [213], and still without references in the Antarctic.…”

Section: Novel Application Topics and Methodological Developmentsmentioning

confidence: 99%

“…Leuschen et al (2014) [110] developed and tested in Antarctica an aerial system with a compact lightweight radar, which demonstrated its potential to collect data over fast-flowing glaciers. The ice thickness obtained by Bello et al (2020) [111] with a GPR in a glacier in King George Island is accompanied by UAV surveys to build detailed basemaps of the area of interest. A review of the representative results for ice and snow thicknesses obtained with the UAV platforms and radar sensors developed by the Center for Remote Sensing of Ice Sheets (CReSIS), University of Kansas, in their surveys in Antarctica (and in Greenland), also updating recent system advancements and future platforms under development, is comprehensibly described by Arnold et al (2020) [112].…”

Section: Main Topic Specific Topic Referencesmentioning

confidence: 99%

UAVs for Science in Antarctica

Pina

Vieira

2022

Remote Sensing

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Remote sensing is a very powerful tool that has been used to identify, map and monitor Antarctic features and processes for nearly one century. Satellite remote sensing plays the main role for about the last five decades, as it is the only way to provide multitemporal views at continental scale. But the emergence of small consumer-grade unoccupied aerial vehicles (UAVs) over the past two decades has paved the way for data in unprecedented detail. This has been also verified by an increasing noticeable interest in Antarctica by the incorporation of UAVs in the field activities in diversified research topics. This paper presents a comprehensive review about the use of UAVs in scientific activities in Antarctica. It is based on the analysis of 190 scientific publications published in peer-reviewed journals and proceedings of conferences which are organised into six main application topics: Terrestrial, Ice and Snow, Fauna, Technology, Atmosphere and Others. The analysis encompasses a detailed overview of the activities, identifying advantages and difficulties, also evaluating future possibilities and challenges for expanding the use of UAV in the field activities. The relevance of using UAVs to support numerous and diverse scientific activities in Antarctica becomes very clear after analysing this set of scientific publications, as it is revolutionising the remote acquisition of new data with much higher detail, from inaccessible or difficult to access regions, in faster and cheaper ways. Many of the advances can be seen in the terrestrial areas (detailed 3D mapping; vegetation mapping, discrimination and health assessment; periglacial forms characterisation), ice and snow (more detailed topography, depth and features of ice-sheets, glaciers and sea-ice), fauna (counting penguins, seals and flying birds and detailed morphometrics) and in atmosphere studies (more detailed meteorological measurements and air-surface couplings). This review has also shown that despite the low environmental impact of UAV-based surveys, the increasing number of applications and use, may lead to impacts in the most sensitive Antarctic ecosystems. Hence, we call for an internationally coordinated effort to for planning and sharing UAV data in Antarctica, which would reduce environmental impacts, while extending research outcomes.

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ICE Thickness Using Ground Penetrating Radar at Znosko Glacier on King George Island

Cited by 9 publications

References 7 publications

Trends and space–time patterns of near‐surface temperatures on Maxwell Bay, King George Island, Antarctica

Trends and space–time patterns of near‐surface temperatures on Maxwell Bay, King George Island, Antarctica

Cross-Polarized SfM Photogrammetry for the Spatial Reconstruction of Challenging Surfaces, the Case Study of Dobšiná Ice Cave (Slovakia)

UAVs for Science in Antarctica

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