Helheim Glacier's Terminus Position Controls Its Seasonal and Inter‐Annual Ice Flow Variability
Helheim Glacier's Terminus Position Controls Its Seasonal and Inter‐Annual Ice Flow Variability
复制标题
赫尔海姆冰川的终点位置控制其季节性和年际冰流变化
DOI:
10.1029/2021gl097085
复制
发表时间:
2021
影响因子:
5.2
通讯作者:
D.S. Cheng
中科院分区:
文献类型:
--
作者:
G. Cheng;Mathieu Morlighem;J. Mouginot;D.S. Cheng
Over the past decade, one of the largest contributors to total ice discharge across the Greenland ice sheet, Helheim Glacier, has experienced large fluctuations in ice velocity. In this study, we simulate the dynamics of Helheim, from 2007 to 2020, using the Ice‐sheet and Sea‐level System Model to identify the drivers of these large changes in ice discharge. By quantifying the impact of individual external forcing and model parameters on Helheim's modeled velocity, we find that the position of the calving front alone explains the dynamic variability of the glacier, as it has a direct and large impact on Helheim's ice velocity. The seasonal to inter‐annual variability of Helheim Glacier is, however, relatively insensitive to the choice of friction law or ice rheology factor. This study shows that more research on calving dynamics and ice–ocean interactions is required to project the future of this sector of Greenland.
登录
查看更多内容
影响因子:
4
作者:
Bjørk A
通讯作者:
Bjørk A
影响因子:
3.9
作者:
Kehrl, L. M.;Joughin, I.;Krieger, L.
通讯作者:
Krieger, L.
DOI:
10.5194/tc-14-1209-2020
发表时间:
2020
期刊:
The Cryosphere
影响因子:
--
作者:
Tedesco, Marco;Fettweis, Xavier
通讯作者:
Fettweis, Xavier
影响因子:
18.3
作者:
Moon, T.;Sutherland, D. A.;Straneo, F.
通讯作者:
Straneo, F.