Vast ice depression in Dålk Glacier, East Antarctica

In the afternoon of January 30, 2017, the wide depression in the western part of the Dålk Glacier, East Antarctica, was formed. By coincidence, aerial surveying was carried out in this area, so it is possible to assess the extent of this catastrophic phenomenon. Aerial photos were taken on January 2...

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Bibliographic Details
Published in:Ice and Snow
Main Authors: S. Popov V., S. Pryakhin S., D. Bliakharskii P., G. Pryakhina V., S. Tyurin V., С. Попов В., С. Пряхин С., Д. Бляхарский П., Г. Пряхина В., С. Тюрин В.
Format: Article in Journal/Newspaper
Language:English
Published: IGRAS 2017
Subjects:
Antarctic glaciology
glacier hydrology
jökulhlaups
subglacial processes
subglacier floods
антарктическая гляциология
подледниковые паводки
гляциальная гидрология
йокульлауп
субгляциальные процессы
Antarctic
East Antarctica
Dålk Glacier
Boulder Lake
Antarc*
Antarctica
Антарктида
Online Access:https://ice-snow.igras.ru/jour/article/view/408
https://doi.org/10.15356/2076-6734-2017-3-427-432
Description
Summary:In the afternoon of January 30, 2017, the wide depression in the western part of the Dålk Glacier, East Antarctica, was formed. By coincidence, aerial surveying was carried out in this area, so it is possible to assess the extent of this catastrophic phenomenon. Aerial photos were taken on January 20 and February 9, 2017, respectively. Based on the photographic data, the size of the depression were 183 × 220 m, and its area reached 40.260 m2. The depth of the depression in the early days was 20–30 meters; the maximum measured depth was 43 m. An approximate volume of the cavern was about 884,013 m3. On preliminary conclusions, this event should be the similar jökulhlaups, when the water of Boulder Lake broke the icy border and rushed downstream under Dålk Glacier to Prudz Bay. 30 января 2017 г. на участке дороги, соединяющей российскую станцию Прогресс и китайскую станцию Зонгшан с аэродромом и трассой следования санно-гусеничных походов на внутриконтинентальные станции Восток и Кунлун, в западной части ледника Долк (Dålk Glacier), в районе российской полевой базы Прогресс-1 образовался провал. Дана характеристика этого провала.

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