Weekly to monthly terminus variability of Greenland's marine-terminating outlet glaciers
Weekly to monthly terminus variability of Greenland's marine-terminating outlet glaciers
复制标题
格陵兰岛海洋终止出口冰川的每周到每月的终点变化
DOI：
10.5194/tc-17-1-2023
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
I. Joughin
中科院分区：
文献类型：
--
作者：
T. Black;I. Joughin
摘要。格陵兰岛终末位置的季节性变化
Abstract. Seasonal terminus-position variability of Greenland's
marine-terminating outlet glaciers is superimposed on multidecadal trends
of glacier retreat. To characterize this seasonal variability, we manually
digitized terminus positions for 219 marine-terminating glaciers in
Greenland from January 2015 through December 2021 using Sentinel-1 synthetic aperture radar (SAR) mosaics. We digitized at a monthly frequency for 199 glaciers and at a
6 d frequency for 20 glaciers. We found that nearly 80 % of glacier
termini in Greenland vary significantly on a seasonal basis. For these
seasonally varying glaciers, on average, seasonal retreat typically begins
in mid-May, and seasonal advance generally commences in early October. The
timing of the initiation of the retreat period may be related to the timing
of the onset of ice-sheet surface melt. The rate of retreat events peaks in
late summer and reaches a minimum in late winter and early spring. The
median magnitude of terminus-position seasonality, the difference between
glacier length at the dates of peak advance and retreat, is about 220 m. We find a stronger correlation between this magnitude and glacier velocity than between magnitude and glacier width. Terminus-position seasonality can
influence longer-term glacier dynamics and, consequently, ice-sheet mass
balance. This study contributes to our understanding of terminus-position
seasonality for individual glaciers and collectively for glaciers around the entire Greenland Ice Sheet.
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Helheim、Kangerdlugssuaq 和其他 14 个主要格陵兰出口冰川过去 25 年的冰川动态
DOI：
10.5194/tcd-6-1637-2012
发表时间：
2012
期刊：
--
影响因子：
--
作者：
Bevan S
通讯作者：
Bevan S
影响因子：
3.9
作者：
Kehrl, L. M.;Joughin, I.;Krieger, L.
通讯作者：
Krieger, L.
TermPicks：格陵兰冰川终点站一个世纪的数据，用于科学和机器学习应用
DOI：
10.5194/tc-16-3215-2022
发表时间：
2022
期刊：
The Cryosphere
影响因子：
--
作者：
Goliber S
通讯作者：
Goliber S
格陵兰冰盖潮水冰川终点位置对气候的线性响应
影响因子：
3.4
作者：
Fahrner D
通讯作者：
Fahrner D