Fifty-five years of Russian radio-echo sounding investigations in Antarctica

Попов, С. В.

doi:10.1017/aog.2020.4

Cited by 17 publications

(20 citation statements)

References 46 publications

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“…Other early surveys were also led by Russia, Germany, Iceland, Italy, China, and Canada (among others) across Antarctica and Greenland, as well as Iceland, Arctic Ice Caps, and mountain glaciers (e.g. Drewry, 1983; Bingham and Siegert, 2007; Björnsson, 2020; Popov, 2020). Planetary radar sounders have also been used, or are planned, to observe the subsurface and near-surface conditions of Mars, Earth's moon, comets and the icy moons of Jupiter (e.g.…”

Section: Introductionmentioning

confidence: 99%

Five decades of radioglaciology

et al. 2020

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Radar sounding is a powerful geophysical approach for characterizing the subsurface conditions of terrestrial and planetary ice masses at local to global scales. As a result, a wide array of orbital, airborne, ground-based, and in situ instruments, platforms and data analysis approaches for radioglaciology have been developed, applied or proposed. Terrestrially, airborne radar sounding has been used in glaciology to observe ice thickness, basal topography and englacial layers for five decades. More recently, radar sounding data have also been exploited to estimate the extent and configuration of subglacial water, the geometry of subglacial bedforms and the subglacial and englacial thermal states of ice sheets. Planetary radar sounders have observed, or are planned to observe, the subsurfaces and near-surfaces of Mars, Earth's Moon, comets and the icy moons of Jupiter. In this review paper, and the thematic issue of the Annals of Glaciology on ‘Five decades of radioglaciology’ to which it belongs, we present recent advances in the fields of radar systems, missions, signal processing, data analysis, modeling and scientific interpretation. Our review presents progress in these fields since the last radio-glaciological Annals of Glaciology issue of 2014, the context of their history and future prospects.

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Section: Introductionmentioning

confidence: 99%

Five decades of radioglaciology

et al. 2020

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“…Geophysical surveys of the coast of Princess Elizabeth Land (PEL) began in 1971, providing basic ice thickness, bed topography, and magnetic field data (Popov and Kiselev, 2018;Popov, 2020). Prior to our work, virtually no RES data had been acquired upstream of ∼ 300 km from the grounding line of PEL, however.…”

Section: Introductionmentioning

confidence: 99%

Bed topography of Princess Elizabeth Land in East Antarctica

Cui

Jeofry

Greenbaum

et al. 2020

Earth Syst. Sci. Data

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Abstract. We present a topographic digital elevation model (DEM) for Princess Elizabeth Land (PEL), East Antarctica. The DEM covers an area of ∼900 000 km2 and was built from radio-echo sounding data collected during four campaigns since 2015. Previously, to generate the Bedmap2 topographic product, PEL's bed was characterized from low-resolution satellite gravity data across an otherwise large (>200 km wide) data-free zone. We use the mass conservation (MC) method to produce an ice thickness grid across faster flowing (>30 m yr−1) regions of the ice sheet and streamline diffusion in slower flowing areas. The resulting ice thickness model is integrated with an ice surface model to build the bed DEM. Together with BedMachine Antarctica and Bedmap2, this new bed DEM completes the first-order measurement of subglacial continental Antarctica – an international mission that began around 70 years ago. The ice thickness data and bed DEMs of PEL (resolved horizontally at 500 m relative to ice surface elevations obtained from the Reference Elevation Model of Antarctica – REMA) are accessible from https://doi.org/10.5281/zenodo.4023343 (Cui et al., 2020a) and https://doi.org/10.5281/zenodo.4023393 (Cui et al., 2020b).

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“…Since then, multiple efforts have been made to collect and compile RES data in order to expand the RES database across the continent (Lythe et al, 2001;Fretwell et al 2013). Russian glaciologists conducted the first geophysical exploration of the coast of Princess Elizabeth Land (PEL) between 1971-2016, providing basic ice thickness, bed topography and magnetic field data (Popov and Kiselev, 2018;Popov, 2020). To date, virtually no RES data have been acquired upstream of ~300 km from the grounding line of PEL.…”

Section: Open Accessmentioning

confidence: 99%

“…In comparison with Bedmap2, the new DEM benefits from recently acquired airborne geophysical data collected by the ICECAP2 programme over four austral summer seasons from 2015 to 2019 ( Figure 1b). We use the Differential Interferometry Synthetic Aperture Radar (DInSAR) grounding line (Rignot et al, 2011) to delimit the ice-shelf facing margin of the ice sheet.…”

Section: Study Areamentioning

confidence: 99%

Bed topography of Princess Elizabeth Land in East Antarctica

Cui¹,

Jeofry²,

Greenbaum³

et al. 2020

Preprint

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Abstract. We present a topographic digital elevation model (DEM) for Princess Elizabeth Land (PEL), East Antarctica – the last remaining region in Antarctica to be surveyed by airborne radio-echo sounding (RES) techniques. The DEM covers an area of ~900,000 km2 and was established from new RES data collected by the ICECAP-2 consortium, led by the Polar Research Institute of China, from four campaigns since 2015. Previously, the region (along with Recovery basin elsewhere in East Antarctica) was characterised by an inversion using low resolution satellite gravity data across a large (>200 km wide) data-free zone to generate the Bedmap2 topographic product. We use the mass conservation (MC) method to produce an ice thickness grid across faster-flowing (>30 m yr-1) regions of the ice sheet and streamline diffusion in slower-flowing areas. The resulting ice thickness model is integrated with an ice surface model to build the bed DEM. With the revised bed DEM, we are able to model the flow of subglacial water and assess where the hydraulic pressure, and hydrological routing, is most sensitive to small ice-surface gradient changes. Together with BedMachine Antarctica, and Bedmap2, this new PEL bed DEM completes the first order measurement of subglacial continental Antarctica – an international mission that began around 70 years ago. The ice thickness and bed elevation DEMs of PEL (resolved horizontally at 500 m relative to ice surface elevations obtained from a combination of European Remote Sensing Satellite 1 radar (ERS-1) and Ice, Cloud and Land Elevation Satellite (ICESat) laser satellite altimetry datasets) are accessible from https://doi.org/10.5281/zenodo.3666088 (Cui et 38al., 2020).

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Fifty-five years of Russian radio-echo sounding investigations in Antarctica

Cited by 17 publications

References 46 publications

Five decades of radioglaciology

Five decades of radioglaciology

Bed topography of Princess Elizabeth Land in East Antarctica

Bed topography of Princess Elizabeth Land in East Antarctica

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