Research output: Contribution to journal › Article › peer-review
Specific Effects of the 1988 Earthquake on Topography and Glaciation of the Tsambagarav Ridge (Mongolian Altai) Based on Remote Sensing and Field Data. / Agatova, Anna; Nepop, Roman; Ganyushkin, Dmitry; Otgonbayar, Demberel; Griga, Semen; Ovchinnikov, Ivan.
In: Remote Sensing, Vol. 14, No. 4, 917, 14.02.2022.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Specific Effects of the 1988 Earthquake on Topography and Glaciation of the Tsambagarav Ridge (Mongolian Altai) Based on Remote Sensing and Field Data
AU - Agatova, Anna
AU - Nepop, Roman
AU - Ganyushkin, Dmitry
AU - Otgonbayar, Demberel
AU - Griga, Semen
AU - Ovchinnikov, Ivan
N1 - Publisher Copyright: © 2022 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2022/2/14
Y1 - 2022/2/14
N2 - Strong earthquakes could serve as a trigger for glacier detachment and associated ice–rock avalanches. The 1988 Tsambagarav earthquake (M = 6.4) initiated collapse of part of the glacier tongue and a further ice–rock avalanche with an abnormal 5 km long path in Zuslan valley, Tsambagarav ridge (Mongolian Altai). Early documentation of surface effects in 1988, remote sensing and field data gathered 16 and 30 years after this event allowed for the assessment of the seismic impact on a reduction of “damaged” glacier under conditions of global warming as well as estimating topography changes in this arid and seismically active area. Because of the earthquake, the glacier immediately lost 10.4 % of its area (0.1 km2 of tongue surface). Additionally, 56% of its area was lost during 1988–2015, shrinking much faster than neighboring glaciers of similar size and exposition. Collapse of snow–ice cornice in the accumulation zone could play a key role in rapid acceleration of the detached ice block and abnormally long path of the ice–rock avalanche. A large amount of debris material provided more than 16 years of ice melting. Downstream, the valley avalanche debris cover repeats the topography of underlying Pleistocene moraines, which should be considered in regional paleogeographical reconstructions.
AB - Strong earthquakes could serve as a trigger for glacier detachment and associated ice–rock avalanches. The 1988 Tsambagarav earthquake (M = 6.4) initiated collapse of part of the glacier tongue and a further ice–rock avalanche with an abnormal 5 km long path in Zuslan valley, Tsambagarav ridge (Mongolian Altai). Early documentation of surface effects in 1988, remote sensing and field data gathered 16 and 30 years after this event allowed for the assessment of the seismic impact on a reduction of “damaged” glacier under conditions of global warming as well as estimating topography changes in this arid and seismically active area. Because of the earthquake, the glacier immediately lost 10.4 % of its area (0.1 km2 of tongue surface). Additionally, 56% of its area was lost during 1988–2015, shrinking much faster than neighboring glaciers of similar size and exposition. Collapse of snow–ice cornice in the accumulation zone could play a key role in rapid acceleration of the detached ice block and abnormally long path of the ice–rock avalanche. A large amount of debris material provided more than 16 years of ice melting. Downstream, the valley avalanche debris cover repeats the topography of underlying Pleistocene moraines, which should be considered in regional paleogeographical reconstructions.
KW - 1988 Tsambagarav earthquake
KW - Field research
KW - Glaciation
KW - Ice–rock avalanche
KW - Mongolian Altai
KW - Remote sensing
KW - Seismicity
KW - Tsambagarav ridge
UR - http://www.scopus.com/inward/record.url?scp=85124959905&partnerID=8YFLogxK
U2 - 10.3390/rs14040917
DO - 10.3390/rs14040917
M3 - Article
AN - SCOPUS:85124959905
VL - 14
JO - Remote Sensing
JF - Remote Sensing
SN - 2072-4292
IS - 4
M1 - 917
ER -
ID: 93059583