Articles | Volume 20, issue 10
https://doi.org/10.5194/tc-20-6021-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-20-6021-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Evaluation of turbulent flux parameterizations over a continental glacier on the Tibetan Plateau
Yichan Xu
Center for the Pan-Third Pole Environment, Lanzhou University, Lanzhou, 730000, China
College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China
Center for the Pan-Third Pole Environment, Lanzhou University, Lanzhou, 730000, China
State Key Laboratory of Tibetan Plateau Earth System, Environment, and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
Daijiao Lin
Center for the Pan-Third Pole Environment, Lanzhou University, Lanzhou, 730000, China
College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China
Lei Hui
Danghe River Basin Water Resources Administration Bureau, Dunhuang, Gansu, 736200, China
College of Surveying and Geo-Informatics, Tongji University, Shanghai, 200092, China
Huabiao Zhao
State Key Laboratory of Tibetan Plateau Earth System, Environment, and Resources (TPESER), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China
Fengying Zhang
Center for the Pan-Third Pole Environment, Lanzhou University, Lanzhou, 730000, China
College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China
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Current models and satellites struggle to accurately represent the land–atmosphere (L–A) interactions over the Tibetan Plateau. We present the most extensive compilation of in situ observations to date, comprising 17 years of data on L–A interactions across 12 sites. This quality-assured benchmark dataset provides independent validation to improve models and remote sensing for the region, and it enables new investigations of fine-scale L–A processes and their mechanistic drivers.
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Atmospheric water vapour isotopes at Kathmandu recorded significantly low δ18Ov and δDv values during cyclones Tauktae and Yaas in 2021, originating in the Arabian Sea and Bay of Bengal, respectively. Such depletion was associated with the intense moisture convergence and strong convection near the sampling site. The lower δ18Ov and higher d-excessv values during cyclone Yaas may be attributed to the occurrence of robust downdrafts during the rainfall.
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There is very strong scientific and public interest regarding the snow thickness on Mountain Everest. Previously reported snow depths derived by different methods and instruments ranged from 0.92 to 3.5 m. Our measurements in 2022 provide the first clear radar image of the snowpack at the top of Mount Everest. The snow thickness at Earth's summit was averaged to be 9.5 ± 1.2 m. This updated snow thickness is considerably deeper than values reported during the past 5 decades.
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Short summary
Glaciers on the Tibetan Plateau are losing mass, yet their turbulent heat exchange with the atmosphere remains uncertain. Using direct observations from the Dunde Glacier (May–October 2023), we analyzed turbulent flux variations at the glacier surface and evaluated five turbulent flux methods. We also showed that during a humid heatwave, turbulent heat input rose sharply and accelerated melt, highlighting the need to improve models under extreme conditions.
Glaciers on the Tibetan Plateau are losing mass, yet their turbulent heat exchange with the...