Interannual variations in the hydrothermal regime around a thermokarst lake in Beiluhe, Qinghai-Tibet Plateau

Lin, Zhijun; Niu, Fujun; Fang, J.H.; Luo, Jing; Yin, Guoan

doi:10.1016/j.geomorph.2016.09.035

Cited by 31 publications

(33 citation statements)

References 26 publications

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Section: Site Description 90mentioning

confidence: 99%

“…This basin is underlain by continuous permafrost 50-80m thick with the volumetric ice content of 30%-93 50% (Lin et al, 2017). During years 2004-2014, the mean annual air and ground temperatures varied 94 from -2.9 °C to -4.1 °C and from -1.8 °C to -0.5 °C, respectively (Lin et al, 2017). The annual mean 95 precipitation ranged from 229 to 467 mm (average: 353 mm), while the annual mean potential 96 evaporation ranged from 1588 to 1626 mm (average: 1613 mm) (Lin et al, 2017).…”

Section: Site Description 90mentioning

confidence: 99%

“…During years 2004-2014, the mean annual air and ground temperatures varied 94 from -2.9 °C to -4.1 °C and from -1.8 °C to -0.5 °C, respectively (Lin et al, 2017). The annual mean 95 precipitation ranged from 229 to 467 mm (average: 353 mm), while the annual mean potential 96 evaporation ranged from 1588 to 1626 mm (average: 1613 mm) (Lin et al, 2017). There are more than 97 1200 lakes and ponds with the surface area larger than 1000 m 2 in the Beiluhe Basin.…”

Section: Site Description 90mentioning

confidence: 99%

“…Lake depths are 99 typically 0.5-2.5 m and the shapes are elliptical or elongated. About 20% of these lakes freeze to the 100 bottom during winter (Lin et al, 2017). 101…”

Section: Site Description 90mentioning

confidence: 99%

“…Submerged plants grow abundantly in the lake 106 sediment throughout the year. The lake has been investigated using in situ instrumentation and 107 numerical modeling with respect to lake ice physics (Huang et al, 2011(Huang et al, , 2016, hydrothermal regime 108 (Lin et al, 2011), bank retrogression (Niu et al, 2011), and its disturbance to surrounding frozen 109 ground (Lin et al, 2017). Considering physical properties of lake ice, a large number of gas bubbles 110 have been found from the top layer of the ice cover.…”

Section: Site Description 90mentioning

confidence: 99%

See 4 more Smart Citations

Modeling experiments on seasonal lake ice mass and energy balance in Qinghai-Tibet Plateau: A case study

Huang¹,

Cheng²,

Zhang³

et al. 2018

Preprint

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The lake-rich Qinghai-Tibet Plateau (QTP) has significant impacts on regional and global 15 water cycles and monsoon systems through heat and water vapor exchange. The lake-atmosphere 16 interactions have been quantified over open-water periods, yet little is known about the lake ice 17 thermodynamics and heat and mass balance during ice-covered season due to a lack of field data. 18Modeling experiments on ice evolution and energy balance were performed in a shallow lake with a 19 high-resolution snow and ice thermodynamic model. The bottom ice growth and decay dominated the 20 seasonal evolution of the thickness of lake ice. Strong surface sublimation was a crucial pattern of ice 21 loss, which was up to 40% of the maximum ice thickness. Simulation results matched well with the 22 observations with respect to ice mass balance components, net ice thickness, and ice temperature. 23Strong solar radiation, consistent freezing air temperature, and low air moisture were the major driving 24 forces controlling the seasonal ice mass balance. Energy balance was estimated at the ice surface and 25 bottom, and within the ice interior and under-ice water. Particularly, almost all heat fluxes showed 26 significant diurnal variations including short-and long-wave radiation, turbulent heat fluxes, water heat 27 fluxes at ice bottom, and absorbed and penetrated solar radiation. The calculated ice surface 28 temperature indicated that the atmospheric boundary layer was consistently stable and neutral over the 29 ice-covered period. The turbulent heat fluxes between the lake ice and air and the net heat gain by the 30 lake were much lower than those during open-water period. Ice surface sublimation (vapor flux) was 31 demonstrated to be a vital seasonal water balance component, accounting for 41% of lake water loss 32 during the ice seasons. 33

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Section: Site Description 90mentioning

confidence: 99%

Section: Site Description 90mentioning

confidence: 99%

Section: Site Description 90mentioning

confidence: 99%

“…Lake depths are 99 typically 0.5-2.5 m and the shapes are elliptical or elongated. About 20% of these lakes freeze to the 100 bottom during winter (Lin et al, 2017). 101…”

Section: Site Description 90mentioning

confidence: 99%

Section: Site Description 90mentioning

confidence: 99%

See 3 more Smart Citations

Modeling experiments on seasonal lake ice mass and energy balance in Qinghai-Tibet Plateau: A case study

Huang¹,

Cheng²,

Zhang³

et al. 2018

Preprint

View full text Add to dashboard Cite

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Using stable isotopes to illuminate thermokarst lake hydrology in permafrost regions on the Qinghai‐Tibet plateau, China

Yang

Hou

et al. 2019

Permafrost & Periglacial

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Thermokarst lakes are widespread and developing on the Qinghai-Tibet Plateau (QTP), and they have modified hydrological processes and water balance in the region.Despite increasing attention, our understanding of the hydrological behaviors of thermokarst lakes under permafrost degradation remains limited on the QTP. In this study, water stable isotope tracers were used to characterize the spatial and seasonal hydrological changes of thermokarst lakes on the central QTP. Significant seasonal variations and factors influencing the isotopic hydrology of lakes were revealed through the ice-free season. Substantial differences in lake-specific input water isotope compositions (δ I ) among the lakes indicate two lake-recharge regimes: raindominated, and snowmelt/permafrost thaw-dominated. We suggest that precipitation and active-layer hydrology controlled these hydrological changes in the ice-free season. However, under ice cover, melting of the surrounding permafrost (including ground ice) dominated the hydrology of thermokarst lakes. Importantly, a conceptual model delineates the hydrological evolution of thermokarst lakes under permafrost degradation. This study serves as a baseline for future investigations of hydrological processes and water balance relating to thawing permafrost on the QTP.

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A 10‐yr thermal regime of permafrost beneath and adjacent to an alpine thermokarst lake, Beiluhe Basin, Qinghai–Tibet Plateau, China

Sun

Zhang

et al. 2021

Permafrost & Periglacial

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Thermokarst lakes are distributed widely in permafrost regions on the Qinghai–Tibet Plateau (QTP), China. Better knowledge of ground thermal variability beneath and around thermokarst lakes is important for understanding future landscape development and hydrological changes. At a typical undisturbed small, shallow, alpine thermokarst lake in the Beiluhe Basin on the QTP, ground temperatures beneath and adjacent to the lake were monitored at four locations with maximum 30 m depth from the lake center to natural ground. The lake is elliptical with an area of ~700 m2 and maximum water depth of 0.6 m. Permafrost was present beneath and adjacent to the lake during the monitoring period. However, supra‐taliks were present above the permafrost table beneath the lake before monitoring of ground temperature began, but were absent around the lake. The supra‐permafrost taliks beneath the lake have thickened over time. The difference in mean permafrost table depth between the lake center and natural ground reached 5.14 m, and permafrost table depths increased beneath the lake, but changed indistinctively around the lake. Mean annual ground temperatures at different depths (5, 10, 20 and 30 m) were higher beneath the lake than around the lake, and mean increasing rates of ground temperature were also greater beneath the lake than around the lake. Ground temperature differences between the lake bottom and natural ground surface are important for understanding ground thermal patterns beneath and around thermokarst lakes.

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Interannual variations in the hydrothermal regime around a thermokarst lake in Beiluhe, Qinghai-Tibet Plateau

Cited by 31 publications

References 26 publications

Modeling experiments on seasonal lake ice mass and energy balance in Qinghai-Tibet Plateau: A case study

Modeling experiments on seasonal lake ice mass and energy balance in Qinghai-Tibet Plateau: A case study

Using stable isotopes to illuminate thermokarst lake hydrology in permafrost regions on the Qinghai‐Tibet plateau, China

A 10‐yr thermal regime of permafrost beneath and adjacent to an alpine thermokarst lake, Beiluhe Basin, Qinghai–Tibet Plateau, China

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