Evgeny Vasilenko

Institute of Industrial Research "Akadempribor", Uzbekistan Academy of Sciences, Uzbekistan,Tashkent · KOTM

To study subglacial hydrological condition and its influence on the glacier dynamics, we drilled Johnsons Glacier on Livingston Island in the Antarctic Peninsula region. Subglacial water pressure was recorded in boreholes at two locations over 2 years, accompanied by high-frequency ice-speed measurements during two summer melt seasons. Water pressu...

We present a first version of the Svalbard ice-free topography (SVIFT1.0) using a mass-conserving approach for mapping glacier ice thickness. SVIFT1.0 is informed by more than 900’000 point-measurements of glacier thickness, totalling almost 8’300 km of thickness profiles. It is publicly available for download. Our estimate for the total ice volume...

We present our estimations of frontal ablation for nine Novaya Zemlya tidewater glaciers, calculated from satellite-derived ice velocities, airborne 20 MHz GPR RES measurements of glacier ice thickness in 2014-2016, and mass change due to changes in terminus position. Here only those glaciers are considered where in the last years we carried out th...

Frontal ablation rate of 31 RES-surveyed glaciers in the Russian Arctic was assessed. Data on ice thickness of 31 glaciers (12 on NZ, 11 on FJL, and 8 glaciers on SZ) were obtained during our airborne 20 MHz GPR RES campaigns in 2014–2016. Data on variations of glacier fronts from 2001 to 2016 were extracted from Landsat satellite imagery. Glacier...

Frontal ablation (the sum of ice loss through calving and submarine melt) of tidewater glaciers and ice caps in the Russian Arctic is poorly known. Meanwhile it is an important component of their mass balance, and its knowledge is strongly required when considering the iceberg risk in off-shore industrial activities. Study area is in three archipel...

The results of ground-based RES studies (20 MHz) at the Austre Grønfjordbreen and Fridtjovbreen glaciers on Nordenskiöld Land, Svalbard, spring 2010–2012, were compared with previous airborne RES data (620 MHz) of 1979 to understand the hydrothermal structure and its changes with time for these twinned glaciers. Temperature measurements in 9 shallo...

The results of ice-thickness measurements and modelling of the Greater Caucasus glaciers, using radio-echo sounding data, GlabTop model and satellite imagery, are presented and discussed. Ground and airborne radio-echo sounding measurements were conducted at selected Caucasus glaciers, including the biggest Bezengi glacier, reference glaciers Djank...

This work presents and discusses the results of ice-thickness measurements and modeling of the Greater Caucasus glaciers, using radio-echo sounding data, GlabTop model and satellite imagery. Ground and airborne radio-echo sounding measurements were conducted at selected Caucasus glaciers, including the biggest Bezengi glacier, reference glaciers Dj...

Low-temperature processes seem to be the most promising for the extraction of CO2 from gases with high acid components content. The present paper contains the research results of using supersonic separation technology (3S-separation) for the extraction of CO2 from natural gases. 3S-separation technology is based on separation of selected components...

We present ground-penetrating radar (GPR)–based volume calculations, with associated error estimates, for eight glaciers on Wedel Jarlsberg Land, southwestern Spitsbergen, Svalbard, and compare them with those obtained from volume-area scaling relationships. The volume estimates are based upon GPR ice-thickness data collected during the period 2004...

As part of ongoing work to obtain a reliable estimate of the total ice volume of Svalbard glaciers and their potential contribution to sea-level rise, we present here volume calculations, with detailed error estimates, for ten glaciers on western Nordenskiöld Land, central Spitsbergen, Svalbard. The volume estimates are based upon a dense net of GP...

Accurate glacier volume and ice-thickness estimations are highly important for many glaciological applications. Recent glacier reduction is affecting local river discharge and contributes to the global sea level rise. However, direct measurements of ice thickness are very sparse due to its high cost and laboriousness. One of the glacierized mountai...

We describe a compact lightweight impulse radar for radio-echo sounding of subsurface structures designed specifically for glaciological applications. The radar operates at frequencies between 10 and 75 MHz. Its main advantages are that it has a high signal-to-noise ratio and a corresponding wide dynamic range of 132 dB due mainly to its ability to...

The Austfonna ice cap covers an area of 8120 km2 and is by far the largest glacier on Svalbard. Almost 30% of the entire area is grounded below sea-level, while the figure is as large as 57% for the known surge-type basins in particular. Marine ice dynamics, as well as flow instabilities presumably control flow regime, form and evolution of Austfon...

We present the results of low-frequency (20 MHz) radio-echo sounding (RES) carried out in December 2000 and December 2006 on the main ice divides of Livingston Island, South Shetland Islands (SSI), Antarctica, and Bowles Plateau, Antarctica, respectively, as well as high-frequency (200 MHz) RES on the latter, aimed at determining the ice thickness,...

We present the results of several radio-echo sounding surveys carried out on Johnsons and Hurd Glaciers, Livingston Island, Antarctica, between the 1999/2000 and 2004/05 austral summer campaigns, which included both radar profiling and common-midpoint measurements with low (20- 25 MHz)- and high (200MHz)-frequency radars. The latter have allowed us...

In order to study the seasonal and inter-seasonal variations in radio-wave velocity (RWV), radiophysical investigations were made at Hansbreen, a polythermal glacier in Spitsbergen, in July-August 2003 and April 2004. These investigations included repeated radar profiling (20 and 25 MHz) along a transverse profile, repeated common-midpoint measurem...

Aldegondabreen is a small valley glacier, ending on land, located in the Grønfjorden area of Spitsbergen, Svalbard. Airborne radio-echo sounding in 1974/75, using a 440 MHz radar, revealed a polythermal two-layered structure, which has been confirmed by detailed ground-based radio-echo sounding done in 1999 using a 15 MHz monopulse radar. The 1999...

A new digital recording system (DRS) for radioglaciological studies has been developed. The main advantages of the system, as compared to other DRS applied in glaciology, arc its short sampling interval (5 ns), high number of samples per waveform (4082), waveform stacking capabilities from 256 to 8192-fold, fast recording in an 8 MB RAM memory, and...

The results of measurements of radio-wave velocities (RWV) by wide-angle reflection (WAR) methods in the temperate Abramov Glacier in the Alai Mountain Ridge and the "two-layered' sub-polar Fridtjovbreen and Hansbreen on Svalbard using a low-frequency (2-13 MHz) radar are considered and discussed. The experimental data obtained and the data from th...

The results of measurements of radio-wave velocities (RWV) by wide-angle reflection (WAR) methods in the temperate Abramov Glacier in the Alai Mountain Ridge and the “two-layered” sub-polar Fridtjovbreen and Hansbreen on Svalbard using a low-frequency (2–13 MHz) radar are considered and discussed. The experimental data obtained and the data from th...