Dynamic process simulation of a glacier on Qilian Mountain based on a thermo-mechanically coupled model

Wu, Zhaofei; Zhang, Huiwen; Liu, Shiyin

doi:10.1016/j.scitotenv.2021.147027

Cited by 8 publications

(5 citation statements)

References 80 publications

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“…The simulated results of ice temperature showed that the average temperature of the HLG glacier in study area was about −1.5 ºC, much higher than − 5.2ºC of the H8 glacier in Tianshan Mountains and −5.5 ºC of the SG3 glacier in Qilian Mountains (Wu, et al, 2021;Wu, et al, 2019).While the ice temperature at the bed rock was between −0.25ºC and −1.45ºC, reaching the range of the pressure melting point (Geng-nian, et al, 2009;Isenko, et al, 2005).These exists many crevasses and melt holes on the surface, and englacial channel extend in all directions. In addition, perennial high atmospheric temperature leads to the higher whole ice temperature.…”

Section: Ice Temperaturementioning

confidence: 83%

“…The numerical methods for the full-Stokes model could be obtained using the finite elements based on the code of Elmer (http://www.csc.fi/elmer). The specific methods and algorithm designs have been presented in some studies (Gagliardini, et al, 2013;Seddik, et al, 2012;Wu, et al, 2021;Wu, et al, 2019) and would not be described in detail here. The Elmer/Ice model solves the thermal and mechanical coupling problems of ice flow by considering the relationship between temperature and deformation of ice flow, and is a model for comprehensively evaluating the dynamic mechanism of glaciers.…”

Section: Processingmethodsmentioning

confidence: 99%

“…For the three-dimensional models, the Elmer/Ice models obtained from the open source code has also been widely used 4 in many glacial researches (Dongen, Kirchner, Gijzen, Walet.alSydow 2018;Gagliardini, et al, 2013;Schafer, et al, 2012;Zwinger and Moore 2009). Although there have been a few three-dimensional dynamic studies on continental glaciers in China (Wu, et al, 2021;Wu, et al, 2019;Zhao, Liyun, et al, 2014), the three-dimensional dynamic studies of temperate glaciers is almost blank.…”

mentioning

confidence: 99%

“…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.…”

mentioning

confidence: 99%

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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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Section: Ice Temperaturementioning

confidence: 83%

Section: Processingmethodsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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

Zhang

Chen

2023

Preprint

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“…The region's highest and lowest recorded temperatures were in January (−14.8 • C) and July (9.8 • C), respectively. The plant growing period is approximately 150 d, and there is no absolute frost-free period throughout the year [26].…”

Section: Study Areamentioning

confidence: 99%

Soil Microbial Community Varied with Vegetation Types on a Small Regional Scale of the Qilian Mountains

Zhao

Yin

et al. 2022

Sustainability

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Clarifying the response of soil microbial communities to the change of different vegetation types on a small regional scale is of great significance for understanding the sustainability of grassland development. However, the distribution patterns and driving factors of the microbial community are not well understood in the Qilian Mountains. Therefore, we characterized and compared the soil microbial communities underlying the four vegetation types in a national natural reserve (reseeded grassland, swamp meadow, steppe meadow, and cultivated grassland) using high-throughput sequencing of the 16S rRNA and ITS. Meanwhile, the plant community and soil physicochemical characteristics were also determined. The results showed that bacterial and fungal communities in all vegetation types had the same dominant species, but the relative abundance differed substantially, which caused significant spatial heterogeneities on the small regional scale. Specifically, bacteria showed higher variability among different vegetation types than fungi, among which the bacterial and fungal communities were more sensitive to the changes in soil than to plant characteristics. Furthermore, soil organic carbon affected the widest portion of the microbial community, nitrate-nitrogen was the main factor affecting bacteria, and aboveground plant biomass was the main factor affecting fungi. Collectively, these results demonstrate the value of considering multiple small regional spatial scales when studying the relationship between the soil microbial community and environmental characteristics. Our study may have important implications for grassland management following natural disturbances or human alterations.

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Historical and projected evolutions of glaciers in response to climate change in High Mountain Asia

Yang,

Zhao,

et al. 2023

Environmental Research

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Dynamic process simulation of a glacier on Qilian Mountain based on a thermo-mechanically coupled model

Cited by 8 publications

References 80 publications

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

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

Soil Microbial Community Varied with Vegetation Types on a Small Regional Scale of the Qilian Mountains

Historical and projected evolutions of glaciers in response to climate change in High Mountain Asia

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