Articles | Volume 16, issue 7
https://doi.org/10.5194/tc-16-2671-2022
https://doi.org/10.5194/tc-16-2671-2022
Research article
 | 
08 Jul 2022
Research article |  | 08 Jul 2022

Filling and drainage of a subglacial lake beneath the Flade Isblink ice cap, northeast Greenland

Qi Liang, Wanxin Xiao, Ian Howat, Xiao Cheng, Fengming Hui, Zhuoqi Chen, Mi Jiang, and Lei Zheng

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Cited articles

Aðalgeirsdóttir, G., Gudmundsson, G. H., and Björnsson, H.: The response of a glacier to a surface disturbance: a case study on Vatnajökull ice cap, Iceland, Ann. Glaciol., 31, 104–110, https://doi.org/10.3189/172756400781819914, 2000. 
Björnsson, H.: Subglacial lakes and jökulhlaups in Iceland, Global Planet. Change, 35, 255–271, https://doi.org/10.1016/S0921-8181(02)00130-3, 2003. 
Bowling, J. S., Livingstone, S. J., Sole, A. J., and Chu, W.: Distribution and dynamics of Greenland subglacial lakes, Nat. Commun., 10, 2810​​​​​​​, https://doi.org/10.1038/s41467-019-10821-w, 2019. 
Davison, B. J., Sole, A. J., Livingstone, S. J., Cowton, T. R., and Nienow, P. W.: The Influence of Hydrology on the Dynamics of Land-Terminating Sectors of the Greenland Ice Sheet, Front. Earth Sci., 7, 10, https://doi.org/10.3389/feart.2019.00010, 2019. 
Davison, B. J., Sole, A. J., Cowton, T. R., Lea, J. M., Slater, D. A., Fahrner, D., and Nienow, P. W.: Subglacial Drainage Evolution Modulates Seasonal Ice Flow Variability of Three Tidewater Glaciers in Southwest Greenland, J. Geophys. Res.-Earth Surf., 125, e2019JF005492, https://doi.org/10.1029/2019JF005492, 2020. 
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Using multi-temporal ArcticDEM and ICESat-2 altimetry data, we document changes in surface elevation of a subglacial lake basin from 2012 to 2021. The long-term measurements show that the subglacial lake was recharged by surface meltwater and that a rapid drainage event in late August 2019 induced an abrupt ice velocity change. Multiple factors regulate the episodic filling and drainage of the lake. Our study also reveals ~ 64 % of the surface meltwater successfully descended to the bed.
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