Response mechanism of soil structural heterogeneity in permafrost active layer to freeze–thaw action and vegetation degradation

Zhang, Zhongyang; Wang, Yibo; Ma, Zhanghuai; Lv, Mingxia

doi:10.1016/j.catena.2023.107250

Cited by 9 publications

(3 citation statements)

References 42 publications

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“…However, it is important to note that shallow frozen soil does not completely block the interaction between deeper soil layers and the surface. Frost heave in the soil creates large pores, allowing snowmelt water and precipitation to bypass the matrix layer and reach the deeper soils (Jiang et al, 2021;Zhang et al, 2023). This phenomenon is considered one of the significant reasons for low runoff in the early thawing season (Mohammed et al, 2021).…”

Section: The Effect Of the Mountain Cryosphere Degradation On Runoffmentioning

confidence: 99%

“…Mountain cryosphere is considered a crucial "water tower" and a climate change indicator due to its sensitivity to climate change (Tang et al, 2023). However, the cryosphere is rapidly retreating in many parts of the world, including glacier retreat, expansion of glacier lakes, northward movement of the permafrost southern limit, and shrinking snow cover area (Moreno et al, 2022;Ding et al, 2019;Wang et al, 2023). These changes have disrupted the water tower region and pose significant challenges to sustainable water resources management (Ragettli et al, 2016;Yao et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Projected future changes in cryosphere and hydrology of a mountainous catchment in the Upper Heihe River, China

Chang,

Gao,

Yong

et al. 2023

Preprint

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Abstract. Climate warming exacerbates the degradation of the mountain cryosphere, including glacier retreat, reduction in snow cover area, and permafrost degradation. These changes dramatically alter the local and downstream hydrological regime, posing significant threats to basin-scale water resource management and sustainable development. However, there is still a lack of systematic research that evaluates the variation of cryospheric elements in mountainous catchments and their impacts on future hydrology and water resources. In this study, we developed an integrated cryospheric-hydrologic model, referred to as the FLEX-Cryo model. This model comprehensively considers glaciers, snow cover, frozen soil, and their dynamic impacts on hydrological processes in the mountainous Hulu catchment located in the Upper Heihe river of China. We utilized the state-of-the-art climate change projection data from the sixth phase of the Coupled Model Intercomparison Project (CMIP6) to simulate the future changes in the mountainous cryosphere and their impacts on hydrology. Our findings showed that the two glaciers in the Hulu catchment will completely melt out around the years 2045–2051. By the end of the 21st century, the annual maximum snow water equivalent is projected to decrease by 41.4 % and 46.0 %, while the duration of snow cover will be reduced by approximately 45 and 70 days. The freeze onset of seasonal frozen soil is expected to be delayed by 10 and 22 days, while the thaw onset of permafrost is likely to advance by 19 and 32 days. Moreover, the maximum freeze depth of seasonal frozen soil is projected to decrease by 5.2 and 10.9 cm per decade, and the depth of the active layer will increase by 8.2 and 15.5 cm per decade. Regarding hydrology, runoff exhibits a decreasing trend until the complete melt-out of glaciers, resulting in a total runoff decrease of 15.6 % and 18.1 %. Subsequently, total runoff shows an increasing trend, primarily due to an increase in precipitation. Permafrost degradation causes the duration of low runoff in the early thawing season to decrease, and the discontinuous baseflow recession gradually transitions into linear recessions, leading to an increase in baseflow. Our results highlight the significant changes expected in the mountainous cryosphere and hydrology in the future. These findings enhance our understanding of cold-region hydrological processes and have the potential to assist local and downstream water resource management in addressing the challenges posed by climate change.

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Section: The Effect Of the Mountain Cryosphere Degradation On Runoffmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Projected future changes in cryosphere and hydrology of a mountainous catchment in the Upper Heihe River, China

Chang,

Gao,

Yong

et al. 2023

Preprint

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“…The freeze-thaw cycle of soil is an important physical change process in the soil, which affects the hydrothermal characteristics of soil and the exchange of heat and water between earth and air, and then affects the hydrothermal process on the land surface, and is an important part of the water cycle [1][2][3]. Research on the freeze-thaw cycle of soil is of great significance for developing plateau water resources, agricultural irrigation, engineering construction, environmental protection, and other practical issues [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Soil Moisture and Heat Change during Freeze–Thaw Process in the Alpine Grassland of Duogerong Basin in the Source of the Yellow River

Li,

Zhang,

Chen

et al. 2024

Sustainability

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To deeply understand the characteristics of soil freeze–thaw water–heat change in the alpine grassland in the Duogerong Basin of the Yellow River source, the soil water–heat profile change monitoring was carried out based on the field monitoring station in the Duogerong Basin of the Yellow River source. By analyzing the comprehensive monitoring data from September 2022 to September 2023, the characteristics of the soil temperature and water content changes in the freeze–thaw cycle of the alpine grassland in the Duogerong Basin at the source of the Yellow River were explored. The results showed that the temperature and water content of each layer of the soil profile changed periodically, and the range of change was negatively correlated with the depth. The annual freeze–thaw process at the observation site is divided into five stages: 31 October to 3 November is the short initial freezing period, 4 November to 18 April is the stable freezing period, 19 April to 26 April is the early ablation period, 27 April to 30 April is the late ablation period, and 1 May to 30 October is the complete ablation period. The maximum soil freezing depth during the observation period was about 250 cm. Soil temperature and moisture content change affect each other; soil water is essential in heat transfer, and the two correlate well. The research results provide theoretical support for further understanding the characteristics of soil hydrothermal changes during the freeze–thaw process in the alpine grassland permafrost area at the source of the Yellow River.

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Changes in global land surface frozen ground and freeze‒thaw processes during 1950–2020 based on ERA5-Land data

Yang,

Chen,

Ding

et al. 2024

Advances in Climate Change Research

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Response mechanism of soil structural heterogeneity in permafrost active layer to freeze–thaw action and vegetation degradation

Cited by 9 publications

References 42 publications

Projected future changes in cryosphere and hydrology of a mountainous catchment in the Upper Heihe River, China

Projected future changes in cryosphere and hydrology of a mountainous catchment in the Upper Heihe River, China

Characteristics of Soil Moisture and Heat Change during Freeze–Thaw Process in the Alpine Grassland of Duogerong Basin in the Source of the Yellow River

Changes in global land surface frozen ground and freeze‒thaw processes during 1950–2020 based on ERA5-Land data

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