Numerical modelling of geothermal heat flux and ice velocity influencing the thermal conditions of the Priestley Glacier trough (northern Victoria Land, Antarctica)

Marmoni, Gian Marco; Martino, Salvatore; Salvatore, María Cristina; Gaeta, Mario; Perinelli, Cristina; Mugnozza, Gabriele Scarascia; Baroni, Carlo

doi:10.1016/j.geomorph.2021.107959

Cited by 3 publications

(2 citation statements)

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“…Ice temperature influences glacier and ice sheet functioning, where small changes in ice temperature can deeply change the glacier dynamics [42,43]. For instance, ice temperature determines how permeable the ice is [1].…”

Section: Glacial Hydrologymentioning

confidence: 99%

Glacial Water: A Dynamic Microbial Medium

et al. 2023

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Microbial communities and nutrient dynamics in glaciers and ice sheets continuously change as the hydrological conditions within and on the ice change. Glaciers and ice sheets can be considered bioreactors as microbiomes transform nutrients that enter these icy systems and alter the meltwater chemistry. Global warming is increasing meltwater discharge, affecting nutrient and cell export, and altering proglacial systems. In this review, we integrate the current understanding of glacial hydrology, microbial activity, and nutrient and carbon dynamics to highlight their interdependence and variability on daily and seasonal time scales, as well as their impact on proglacial environments.

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Section: Glacial Hydrologymentioning

confidence: 99%

Glacial Water: A Dynamic Microbial Medium

et al. 2023

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“…Although these methods can truly reflect the response of the temperate glaciers to climate from the changes of ablation amount, area and volume, the whole glacial movement response to the climate is not completely revealed. And the explanation of the movement and variation mechanism of the glaciers is not sufficient, and there are even some errors in explaining the driving causes of glacial movement and change with climate (Cheng, et al, 2020;Gmm, et al, 2021;Wu, et al, 2021). Compared with other research methods, the glacial dynamic model provides a good way to study the mechanism of glacial changes.…”

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confidence: 99%

Dynamic characteristics simulation of a temperate glacier based on an Elmers/Ice model

Zhang

Chen

2023

Preprint

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A large number of temperate glaciers are distributed in the southwest of China. Due to the effects of perennial high temperatures and excess rainfall, the movement and variations of these temperate glaciers are quite different from those of continental glaciers. To further understand the regulation of changes intemperate glaciers, we simulated the variations in the dynamic characteristic of the Hailuogou(HLG)glacier under the conditions of warm and wet climate based on the Elmer/Ice model in this study. The ice velocity, temperature and deviatoric stress in different directions were calculated. The results were as follows:(1)The high temperature in the ablation zone led to the long-term high-speed movement of glaciers;(2) Stress simulation showed that many areas of the HLG glacier were under the action of tensile force, and there was a certain compressive force occurred only at the positions where the upstream ice surface became narrow from wide, indicating that the viscosity of ice body was low; (3) Because the ice body was in a low viscosity state for a long time, the mass loss caused by ice flow and ablation was great, thus the ablation zone was in a large negative mass balance state. Moreover, the changes of the HLG glacier over the next 40 years were simulated based on two kinds of climatic scenario(RCP4.5 andRCP8.5).The results presented that the ice flow flux in the glacial accumulation zone was difficult to compensate for the mass loss in the ablation zone under the current state of mass balance variation, and then the ablation zone would shrink in the next 40 years. Thus, this study also revealed that temperate glaciers were more sensitive to climate than continental glaciers.

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