Kinematics of the exceptionally-short surge cycles of Sít’ Kusá (Turner Glacier), Alaska, from 1983 to 2013
Kinematics of the exceptionally-short surge cycles of Sít’ Kusá (Turner Glacier), Alaska, from 1983 to 2013
复制标题
1983 年至 2013 年阿拉斯加萨塔库萨(特纳冰川)异常短的涌动周期的运动学
DOI:
10.1017/jog.2021.29
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发表时间:
2021
影响因子:
3.4
通讯作者:
Kreutz, Karl J.
中科院分区:
文献类型:
--
作者:
Nolan, Andrew;Kochtitzky, William;Enderlin, Ellyn M.;McNabb, Robert;Kreutz, Karl J.
Glacier surges are periodic episodes of mass redistribution characterized by dramatic increases in ice flow velocity and, sometimes, terminus advance. We use optical satellite imagery to document five previously unexamined surge events of Sít’ Kusá (Turner Glacier) in the St. Elias Mountains of Alaska from 1983 to 2013. Surge events had an average recurrence interval of ~5 years, making it the shortest known regular recurrence interval in the world. Surge events appear to initiate in the winter, with speeds reaching up to ~25 m d−1. The surges propagate down-glacier over ~2 years, resulting in maximum thinning of ~100 m in the reservoir zone and comparable thickening at the terminus. Collectively, the rapid recurrence interval, winter initiation and down-glacier propagation suggest Sít’ Kusá's surges are driven by periodic changes in subglacial hydrology and glacier sliding. Elevation change observations from the northern tributary show a kinematic disconnect above and below an icefall located 23 km from the terminus. We suggest the kinematic disconnect inhibits drawdown from the accumulation zone above the icefall, which leads to a steady flux of ice into the reservoir zone, and contributes to the glacier's exceptionally short recurrence interval.
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影响因子:
5.8
作者:
M. Jacquemart;M. Loso;Matthias Leopold;Ethan Welty;Etienne Berthier;Jasmine S.S. Hansen;John Sykes;K. Tiampo
通讯作者:
M. Jacquemart;M. Loso;Matthias Leopold;Ethan Welty;Etienne Berthier;Jasmine S.S. Hansen;John Sykes;K. Tiampo
DOI:
10.1029/jb092ib09p08903
发表时间:
1987-08-10
期刊:
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS
影响因子:
--
作者:
BLANKENSHIP, DD;BENTLEY, CR;ALLEY, RB
通讯作者:
ALLEY, RB
影响因子:
3.4
作者:
W. Harrison;K. Echelmeyer;E. Chacho;C. Raymond;R. J. Benedict
通讯作者:
R. J. Benedict
影响因子:
1.4
作者:
H. Hoinkes
通讯作者:
H. Hoinkes
影响因子:
5.2
作者:
Dunse, T.;Schellenberger, T.;Reijmer, C. H.
通讯作者:
Reijmer, C. H.