TY - JOUR

T1 - Post-Little-Ice Age Glacier Recession in the North-Chuya Ridge and Dynamics of the Bolshoi Maashei Glacier, Altai

AU - Ganyushkin, Dmitry

AU - Bantcev, Dmitry

AU - Derkach, Ekaterina

AU - Agatova, Anna

AU - Nepop, Roman

AU - Griga, Semyon

AU - Rasputina, Valeria

AU - Ostanin, Oleg

AU - Dyakova, Galina

AU - Pryakhina , Galina

AU - Chistyakov, Kirill

AU - Kurochkin , Yuri

AU - Gorbunova , Yuliya

N1 - Ganyushkin, D.; Bantcev, D.; Derkach, E.; Agatova, A.; Nepop, R.; Griga, S.; Rasputina, V.; Ostanin, O.; Dyakova, G.; Pryakhina, G.; Chistyakov, K.; Kurochkin, Y.; Gorbunova, Y. Post-Little Ice Age Glacier Recession in the North-Chuya Ridge and Dynamics of the Bolshoi Maashei Glacier, Altai. Remote Sens. 2023, 15, 2186. https://doi.org/10.3390/rs15082186

PY - 2023/4/20

Y1 - 2023/4/20

N2 - The glacier recession of the North-Chuya ridge, Altai, after the maximum of the Little Ice Age (LIA) is estimated based on remote sensing and in situ studies of the Bolshoi Maashei glacier. The glacier area decreased from 304.9 ± 23.49 km2 at the LIA maximum to 140.24 ± 16.19 km2 in 2000 and 120.02 ± 16.19 km2 in 2021. The average equilibrium-line altitude (ELA) rise after the LIA was 207 m. The reduction of glaciers was caused by the warming trend, most rapid in the 1990s, and by the decrease in precipitation after the mid-1980s. The volume of glaciers decreased from approximately 16.5 km3 in the LIA maximum to 5.6–5.8 km3 by 2021. From the LIA maximum to 2022, the Bolshoi Maashei glacier decreased from 17.49 km2 to 6.25 km2, and the lower point rose from 2160 m to 2225 m. After the LIA, the glacial snout retreat was about 1 km. The fastest retreat of the glacier terminus was estimated in 2010–2022 as 14.0 m a−1 on average. The glacier mass balance index was calculated, with the results showing a strong negative trend from the mid-1980s until now. Strong melt rates caused the increase in the area of the Maashei lake, which could lead to the weakening of its dam, and prepared for its failure in 2012. The current climatic tendencies are unfavorable for the glaciers.

AB - The glacier recession of the North-Chuya ridge, Altai, after the maximum of the Little Ice Age (LIA) is estimated based on remote sensing and in situ studies of the Bolshoi Maashei glacier. The glacier area decreased from 304.9 ± 23.49 km2 at the LIA maximum to 140.24 ± 16.19 km2 in 2000 and 120.02 ± 16.19 km2 in 2021. The average equilibrium-line altitude (ELA) rise after the LIA was 207 m. The reduction of glaciers was caused by the warming trend, most rapid in the 1990s, and by the decrease in precipitation after the mid-1980s. The volume of glaciers decreased from approximately 16.5 km3 in the LIA maximum to 5.6–5.8 km3 by 2021. From the LIA maximum to 2022, the Bolshoi Maashei glacier decreased from 17.49 km2 to 6.25 km2, and the lower point rose from 2160 m to 2225 m. After the LIA, the glacial snout retreat was about 1 km. The fastest retreat of the glacier terminus was estimated in 2010–2022 as 14.0 m a−1 on average. The glacier mass balance index was calculated, with the results showing a strong negative trend from the mid-1980s until now. Strong melt rates caused the increase in the area of the Maashei lake, which could lead to the weakening of its dam, and prepared for its failure in 2012. The current climatic tendencies are unfavorable for the glaciers.

KW - Altai

KW - glacier

KW - remote sensing

KW - observations

KW - retreat

KW - LIA

KW - reconstruction

KW - warming

KW - mass balance

KW - Altai

KW - glacier

KW - remote sensing

KW - observations

KW - retreat

KW - LIA

KW - reconstruction

KW - warming

KW - mass balance

UR - https://www.mendeley.com/catalogue/b60eba9e-2502-3419-99b9-e9b9a9827e55/

U2 - 10.3390/rs15082186

DO - 10.3390/rs15082186

M3 - Article

VL - 15

JO - Remote Sensing

JF - Remote Sensing

SN - 2072-4292

IS - 8

M1 - 2186

ER -