Seasonal variation of chemical weathering and its controlling factors in two alpine catchments, Nam Co basin, central Tibetan Plateau

Yu, Zhengliang; Wu, Guangjian; Keys, Laura; Li, Fēi; Yan, Ningning; Qu, Dongmei; Liu, Xiaoming

doi:10.1016/j.jhydrol.2019.06.042

Cited by 52 publications

(45 citation statements)

References 60 publications

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“…The extreme cold mean annual air temperature of −6.8 • C at 5680 m a.s.l. (Zhang et al, 2013) should minimize the effect of different regolith properties that favours permafrost conditions. The next critical issue for the estimation of the lower occurrence of probable permafrost is the question of whether the huge resistivities observed on profile A (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…A 2-year temperature dataset on the Zhadang glacier, recorded at 5680 m a.s.l. by an automatic weather station (2009)(2010)(2011) at 2 m height, shows a mean annual air temperature (MAAT) of −6.8 • C (Zhang et al, 2013) and suggests permafrost conditions for the surrounding periglacial landscape.…”

Section: Study Areamentioning

confidence: 99%

“…10a). The lack of seasonality and the lower creeping rates compared to rock glaciers in the Alps (Cicoira et al, 2019;Kenner et al, 2017;Wirz et al, 2016) and the semiarid Andes (Strozzi et al, 2020) might be related to the semiarid climate conditions (lack of moisture) and the short time span of 3 months with positive air temperatures in the Qugaqie basin (Zhang et al, 2013). Strozzi et al (2020) figured out that their highest rock glacier "Dos Lenguas" (4300 m a.s.l.)…”

Section: Landformmentioning

confidence: 99%

“…The rock glacier terminus is close to the rooting zone, and they do not span a significant elevation range. Temperature data (MAAT of -6.8 • ), elevated at Zhadang glacier (Zhang et al, 2013), and different, large-scaled permafrost distribution maps (Zou et al, 2017;Obu et al, 2019) suggest a high permafrost probability at elevations greater than 5400 m a.s.l. in the study area.…”

Section: Landformmentioning

confidence: 99%

See 3 more Smart Citations

Insights into a remote cryosphere: a multi-method approach to assess permafrost occurrence at the Qugaqie basin, western Nyainqêntanglha Range, Tibetan Plateau

et al. 2021

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Abstract. Permafrost as a climate-sensitive parameter and its occurrence and distribution play an important role in the observation of global warming. However, field-based permafrost distribution data and information on the subsurface ice content in the large area of the southern mountainous Tibetan Plateau (TP) are very sparse. Existing models based on boreholes and remote sensing approaches suggest permafrost probabilities for most of the Tibetan mountain ranges. Field data to validate permafrost models are generally lacking because access to the mountain regions in extreme altitudes is limited. The study provides geomorphological and geophysical field data from a north-orientated high-altitude catchment in the western Nyainqêntanglha Range. A multi-method approach combines (A) geomorphological mapping, (B) electrical resistivity tomography (ERT) to identify subsurface ice occurrence and (C) interferometric synthetic aperture radar (InSAR) analysis to derive multi-annual creeping rates. The combination of the resulting data allows an assessment of the lower occurrence of permafrost in a range of 5350 and 5500 m above sea level (a.s.l.) in the Qugaqie basin. Periglacial landforms such as rock glaciers and protalus ramparts are located in the periglacial zone from 5300–5600 m a.s.l. The altitudinal periglacial landform distribution is supported by ERT data detecting ice-rich permafrost in a rock glacier at 5500 m a.s.l. and ice lenses around the rock glacier (5450 m a.s.l.). The highest multiannual creeping rates up to 150 mm yr−1 are typically observed on these rock glaciers. This study closes the gap of unknown state of periglacial features and potential permafrost occurrence in a high-elevated basin in the western Nyainqêntanglha Range (Tibetan Plateau).

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Section: Discussionmentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Section: Landformmentioning

confidence: 99%

Section: Landformmentioning

confidence: 99%

See 2 more Smart Citations

Insights into a remote cryosphere: a multi-method approach to assess permafrost occurrence at the Qugaqie basin, western Nyainqêntanglha Range, Tibetan Plateau

et al. 2021

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“…The results are compared with WHO guidelines and also with the national water quality guidelines for aqua culture (NWQGAC), Nepal [26,28]. An increase in the WT may decrease the portability of water due to the high interaction of various chemicals and their reactivity [21,29]. The WT in the lake complex studied ranged from 24.90 °C to 30.70 °C with an average value of 27.58 ± 2.1 °C.…”

Section: General Hydrochemical Patternsmentioning

confidence: 99%

Hydrochemical assessment of the Beeshazar and associated lakes in Central Nepal

et al. 2021

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Water quality deterioration has threatened aquatic life around the world including Nepal, which has been a serious issue for environmental sustainability and economic development. This study evaluated and interpreted hydrochemical parameters of the Beeshazar and associated lakes in Central Himalaya, Nepal. The study revealed that the water in the lake was slightly alkaline as the average pH was 7.52. The correlation and principal component analysis (PCA) identified both geogenic and anthropogenic processes as the controlling factors of hydrochemistry whereas the cluster analysis (CA) showed relatively more pollution in the associated Laxmi Lake. Also, the water quality index (WQI) classified the water as “good” for drinking purposes (i.e., WQI = 33.90), while the pollution index (PI) values were characterized as sub-cleanness and slightly polluted. In general, both the WQI and PI signify that water in the lake complex is currently safe for drinking purposes. It is further confirmed from the comparative analysis of chemical variables with other lakes in the region, WHO and national water quality guidelines for aqua culture that the most of the analyzed water parameters exhibited relatively low concentrations and were within the prescribed guidelines. However, the elevated concentrations of NO3− and PO43− may pose serious problems for retaining water quality in the future. The results could be considered for future planning and management of the Ramsar Lakes of the lowland areas in the Himalaya and also as a valuable reference for the freshwater researchers at the national and international levels.

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Rock–water interaction, chemical weathering and solute transport of two rivers draining contrasting climate gradients in Western Ghats, India

Raj

Gayathri

Vandana

et al. 2023

Earth Surf Processes Landf

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Rock–water interactions and chemical weathering are critical factors that determine the quality and quantity of solute transport in river catchments. However, most studies in this field have been limited to temperate regions and data from the tropics and subtropics are scarce, particularly for small rivers that are more responsive to environmental and climate changes. In this study, we investigated chemical weathering, its causal mechanisms and controlling factors that determine changes in the quality and quantity of solutes in two small, tropical mountainous rivers‐the west‐flowing Thuthapuzha river and the east‐flowing Bhavani river‐that drain through contrasting climate and geologic gradients across the southern part of the Western Ghats, in India. This region is an elevated passive continental margin and an ecologically sensitive area. Hydrochemical analysis of river water revealed that the cationic and anionic concentrations in the samples are in descending order of importance Ca2+ > Na+ > Mg2+ > K+ and HCO3− > Cl− > SO42−. Principal component analysis (PCA) indicated that geogenic factors (geology, chemical weathering and leaching/erosion) have a significant role in determining the hydrochemical characteristics of the rivers. To discriminate the relative contributions of silicate weathering in the river basins, we performed a detailed analysis of the major ion ratios along with forward and inverse modelling. The weathering index computed from the molecular ratio of cations and silica concentrations suggested that silicate weathering leads to kaolinite formation in the soil profile. The carbon dioxide consumption rate (CCR) estimated for the Thuthapuzha river, which is draining the humid western flank of the Western Ghats, was 2.18 × 105 mol·km−2 year−1, whereas the Upper Bhavani river, which is draining the semi‐arid area of the Western Ghats was 1.39 × 105 mol·km−2 year−1. Our study highlights the interplay of climatic factors and the geologic characteristics of the terrain that significantly influence the nature and characteristics of solute transport through the rivers in the study area.

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Seasonal variation of chemical weathering and its controlling factors in two alpine catchments, Nam Co basin, central Tibetan Plateau

Cited by 52 publications

References 60 publications

Insights into a remote cryosphere: a multi-method approach to assess permafrost occurrence at the Qugaqie basin, western Nyainqêntanglha Range, Tibetan Plateau

Insights into a remote cryosphere: a multi-method approach to assess permafrost occurrence at the Qugaqie basin, western Nyainqêntanglha Range, Tibetan Plateau

Hydrochemical assessment of the Beeshazar and associated lakes in Central Nepal

Rock–water interaction, chemical weathering and solute transport of two rivers draining contrasting climate gradients in Western Ghats, India

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