Toward Numerical Modeling of Interactions Between Ice-Marginal Proglacial Lakes and Glaciers

Carrivick, Jonathan L.; Tweed, Fiona S.; Sutherland, Jenna L.; Mallalieu, Joseph

doi:10.3389/feart.2020.577068

Cited by 46 publications

(68 citation statements)

References 104 publications

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“…Future lake formation is likely to be concentrated in regions where marine-terminating outlets retreat on to land, as the terrestrial margin length will increase and hold a sinuous form 36 . Ice marginal lakes will therefore form a crucial component in the dynamics of these outlets during this transitional phase 37 , 38 . Additionally, the dynamics of Greenland’s terrestrial store of freshwater will alter if this trend of increasing lake abundance with decreasing size continues into the future.…”

Section: Discussionmentioning

confidence: 99%

Greenland-wide inventory of ice marginal lakes using a multi-method approach

How

Messerli

Mätzler

et al. 2021

Sci Rep

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Ice marginal lakes are a dynamic component of terrestrial meltwater storage at the margin of the Greenland Ice Sheet. Despite their significance to the sea level budget, local flood hazards and bigeochemical fluxes, there is a lack of Greenland-wide research into ice marginal lakes. Here, a detailed multi-sensor inventory of Greenland’s ice marginal lakes is presented based on three well-established detection methods to form a unified remote sensing approach. The inventory consists of 3347 ($$\pm 8$$ ± 8 %) ice marginal lakes ($$>0.05\,{{\text{ km }}^{2}}$$ > 0.05 km 2 ) detected for the year 2017. The greatest proportion of lakes lie around Greenland’s ice caps and mountain glaciers, and the southwest margin of the ice sheet. Through comparison to previous studies, a $$\sim 75$$ ∼ 75 % increase in lake frequency is evident over the west margin of the ice sheet since 1985. This suggests it is becoming increasingly important to include ice marginal lakes in future sea level projections, where these lakes will form a dynamic storage of meltwater that can influence outlet glacier dynamics. Comparison to existing global glacial lake inventories demonstrate that up to 56% of ice marginal lakes could be unaccounted for in global estimates of ice marginal lake change, likely due to the reliance on a single lake detection method.

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Section: Discussionmentioning

confidence: 99%

Greenland-wide inventory of ice marginal lakes using a multi-method approach

How

Messerli

Mätzler

et al. 2021

Sci Rep

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“…Another issue that we resolve here is the way how PISM and other ice sheet models (e.g. BISICLES, as noted in Matero et al (2020) and Sutherland et al (2020)) handle sea level and how it affects the LakeCC model. Sea level elevation is assumed to be globally constant and hence is set by a scalar (time series).…”

Section: Lakeccmentioning

confidence: 99%

“…2.3). Some of the parameterizations are explicitly formulated for the marine ice margin and other processes are reported to substantially differ in strength between lacustrine and oceanic environments (Carrivick et al, 2020). Implementation of specific lacustrine processes could yield a more appropriate treatment of lake boundaries.…”

Section: Glacio-lacustrine Interactionsmentioning

confidence: 99%

“…This is expected to have an buttressing effect on the ice sheet and reduce mass loss. Seasonal ice cover might even increase this effect (Mallalieu et al, 2020).…”

Section: Glacio-lacustrine Interactionsmentioning

confidence: 99%

“…featuring multiple, time variable lakes. The need for including glacio-lacustrine interactions into numerical ice sheet modeling attempts was recently highlighted in review articles by Margold et al (2018) and Carrivick et al (2020). The latter reference discusses concerns when implementing such a lake-ice boundary condition for ice sheet models.…”

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confidence: 99%

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PISM-LakeCC: Implementing an adaptive proglacial lake boundary into an ice sheet model

Hinck

Gowan

Zhang

et al. 2020

Preprint

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Abstract. Geological records show that vast proglacial lakes existed along the land terminating margins of palaeo ice sheets in Europe and North America. Proglacial lakes impact ice sheet dynamics by imposing marine-like boundary conditions at the ice margin. These lacustrine boundary conditions include changes in the ice sheet’s geometry, stress balance and frontal ablation and therefore affect the entire ice sheet’s mass balance. This interaction, however, has not been rigorously implemented in ice sheet models. In this study, the implementation of an adaptive lake boundary into the Parallel Ice Sheet Model (PISM) is described and applied to the glacial retreat of the Laurentide Ice Sheet (LIS). The results show that the presence of proglacial lakes locally enhances the ice flow. Along the continental ice margin, ice streams and ice lobes can be observed. Lacustrine terminating ice streams cause immense thinning of the ice sheet’s interior and thus play a significant role in the demise of the LIS. Due to the presence of lakes, a process similar to the marine ice sheet instability causes the collapse of the ice saddle over Hudson Bay, which blocked drainage via the Hudson Strait. In control experiments without a lake model, Hudson Bay is still glaciated at the end of the simulation. Future studies should target the development of parametrizations that better describe the glacial-lacustrine interactions.

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Proglacial lake evolution coincident with glacier dynamics in the frontal zone of Kvíárjökull, South‐East Iceland

Kavan,

Stuchlík,

Carrivick

et al. 2024

Earth Surf Processes Landf

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The termini of Icelandic glaciers are highly dynamic environments. Pronounced changes in frontal ablation in recent years have consequently changed ice dynamics. In this study, we reveal the inter‐seasonal dynamics of the Kvíárjökull ablation zone and proglacial zone using ArcticDEM and Sentinel‐2 images acquired between 2011 and 2021 and intra‐seasonal dynamics with repeated UAV surveys during summer 2021. Average glacier surface velocity in the ablation zone ranged from 51 m year−1 in 2015 up to 199 m year−1 in 2018, with maxima within the axial zone of the glacier and minima on the glacier edges. Coincidentally, and in accordance with glacier retreat/advance, the ice‐marginal proglacial lake fluctuated in its area, and we interpret that it was also a key factor in the development of the glacier terminus morphology. A complex spatial pattern of glacier surface elevation changes, including thickening in the frontal true left margin of the terminus, is interpreted to be due to variable subglacial topography, relatively fast ice flow from the accumulation zone and an insulating effect of glacier surface debris cover. In contrast, the true right (southern) part of the glacier terminus experienced thinning and retreat/disintegration also during the 2021 summer season, which we attribute to enhanced frontal ablation connected to the intrusion of lake water into the crevassed glacier terminus. Overall, this study suggests that where glaciers are developing ice‐marginal lakes complex patterns of glacier dynamics and mass loss can be expected, which will confound understanding of the short‐term evolution of these environments.

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Toward Numerical Modeling of Interactions Between Ice-Marginal Proglacial Lakes and Glaciers

Cited by 46 publications

References 104 publications

Greenland-wide inventory of ice marginal lakes using a multi-method approach

Greenland-wide inventory of ice marginal lakes using a multi-method approach

PISM-LakeCC: Implementing an adaptive proglacial lake boundary into an ice sheet model

Proglacial lake evolution coincident with glacier dynamics in the frontal zone of Kvíárjökull, South‐East Iceland

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