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Publication Abstracts

Law et al. 2020

Law, R., N. Arnold, C. Benedek, M. Tedesco, A. Banwell, and I. Willis, 2020: Over-winter persistence of supraglacial lakes on the Greenland Ice Sheet: Results and insights from a new model. J. Glaciol., 66, no. 257, 362-372, doi:10.1017/jog.2020.7.

We present a newly developed 1-D numerical energy-balance and phase transition supraglacial lake model: GlacierLake. GlacierLake incorporates snowfall, in situ snow and ice melt, incoming water from the surrounding catchment, ice lid formation, basal freeze-up and thermal stratification. Snow cover and temperature are varied to test lake development through winter and the maximum lid thickness is recorded. Average wintertime temperatures of -2 to -30°C and total snowfall of 0 to 3.45 m lead to a range of the maximum lid thickness from 1.2 to 2.8 m after ∼250 days, with snow cover exerting the dominant control. An initial ice temperature of -15°C with simulated advection of cold ice from upstream results in 0.6 m of basal freeze-up. This suggests that lakes with water depths above 1.3 to 3.4 m (dependent on winter snowfall and temperature) upon lid formation will persist through winter. These buried lakes can provide a sizeable water store at the start of the melt season, expedite future lake formation and warm underlying ice even in winter.

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BibTeX Citation

@article{la06500e,
  author={Law, R. and Arnold, N. and Benedek, C. and Tedesco, M. and Banwell, A. and Willis, I.},
  title={Over-winter persistence of supraglacial lakes on the Greenland Ice Sheet: Results and insights from a new model},
  year={2020},
  journal={Journal of Glaciology},
  volume={66},
  number={257},
  pages={362--372},
  doi={10.1017/jog.2020.7},
}

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RIS Citation

TY  - JOUR
ID  - la06500e
AU  - Law, R.
AU  - Arnold, N.
AU  - Benedek, C.
AU  - Tedesco, M.
AU  - Banwell, A.
AU  - Willis, I.
PY  - 2020
TI  - Over-winter persistence of supraglacial lakes on the Greenland Ice Sheet: Results and insights from a new model
JA  - J. Glaciol.
JO  - Journal of Glaciology
VL  - 66
IS  - 257
SP  - 362
EP  - 372
DO  - 10.1017/jog.2020.7
ER  -

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