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

2019 ◽  
Vol 30 (1) ◽  
pp. 58-71 ◽  
Author(s):  
Yuzhong Yang ◽  
Qingbai Wu ◽  
Yandong Hou ◽  
Peng Zhang ◽  
Hanbo Yun ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Tibet Plateau ◽  
Lake Hydrology ◽  
Thermokarst Lake ◽  
Qinghai Tibet Plateau ◽  
Permafrost Regions

Impact of a thermokarst lake on the soil hydrological properties in permafrost regions of the Qinghai-Tibet Plateau, China

2017 ◽  
Vol 574 ◽  
pp. 751-759 ◽  
Author(s):  
Zeyong Gao ◽  
Fujun Niu ◽  
Yibo Wang ◽  
Jing Luo ◽  
Zhanju Lin
Keyword(s):  
Tibet Plateau ◽  
Thermokarst Lake ◽  
Qinghai Tibet Plateau ◽  
Permafrost Regions

scholarly journals Analysis of Raindrop Size Distribution Characteristics in Permafrost Regions of the Qinghai–Tibet Plateau Based on New Quality Control Scheme

Water ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2265 ◽  
Author(s):  
Ma ◽  
Zhao ◽  
Yang ◽  
Xiao ◽  
Zhang ◽  
...  
Keyword(s):  
Particle Size ◽  
Quality Control ◽  
Rain Rate ◽  
Tibet Plateau ◽  
Frozen Ground ◽  
Fall Velocity ◽  
Raindrop Size Distribution ◽  
Raindrop Size ◽  
Qinghai Tibet Plateau ◽  
Permafrost Regions

Raindrop size distribution (DSD) can reflect the fundamental microphysics of precipitation and provide an accurate estimation of its amount and characteristics; however, there are few observations and investigations of DSD in cold, mountainous regions. We used the second-generation particle size and velocity disdrometer Parsivel2 to establish a quality control scheme for raindrop spectral data obtained for the Qinghai–Tibet Plateau in 2015. This scheme included the elimination of particles in the lowest two size classes, particles >10 mm in diameter and rain rates <0.01 mm∙h−1. We analyzed the DSD characteristics for different types of precipitation and rain rates in both permafrost regions and regions with seasonally frozen ground. The precipitation in the permafrost regions during the summer were mainly solid with a large particle size and slow fall velocity, whereas the precipitation in the regions with seasonally frozen ground were mainly liquid. The DSD of snow had a broader drop spectrum, the largest particle size, the slowest fall velocity, and the largest number of particles, followed by hail. Rain and sleet shared similar DSD characteristics, with a smaller particle size, slower velocity, and smaller number of particles. The particle concentration for different classes of rain rate decreased with an increase in particle size and decreased gradually with an increase in rain rate. Precipitation with a rain rate >2 mm∙h−1 was the main contributor to the annual precipitation. The dewpoint thresholds for snow and rain in permafrost regions were 0 and 1.5 °C, respectively. The dewpoint range 0–1.5 °C was characterized by mixed precipitation with a large proportion of hail. This study provides valuable DSD information on the Qinghai–Tibet Plateau and can be used as an important reference for the quality control of raindrop spectral data in regions dominated by solid precipitation.

Impact process and mechanism of summertime rainfall on thermal–moisture regime of active layer in permafrost regions of central Qinghai–Tibet Plateau

2021 ◽  
pp. 148970
Author(s):  
Zhang Mingli ◽  
Wen Zhi ◽  
Li Desheng ◽  
Chou Yaling ◽  
Zhou Zhixiong ◽  
...  
Keyword(s):  
Active Layer ◽  
Tibet Plateau ◽  
Moisture Regime ◽  
Impact Process ◽  
Qinghai Tibet Plateau ◽  
Permafrost Regions

scholarly journals Classification of Stable Isotopes and Identification of Water Replenishment in the Naqu River Basin, Qinghai-Tibet Plateau

Water ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 46 ◽  
Author(s):  
Xi Chen ◽  
Guoli Wang ◽  
Fuqiang Wang
Keyword(s):  
Stable Isotopes ◽  
River Basin ◽  
Source Identification ◽  
Evaluation Model ◽  
Tibet Plateau ◽  
High Status ◽  
Fuzzy Evaluation ◽  
Isotopic Study ◽  
Qinghai Tibet Plateau

The stable isotopic study of the mechanism of runoff replenishment in the Qinghai-Tibet Plateau is a time-consuming and complicated process requiring complex monitoring data and scientific evaluation methods. Based on the data of water stable isotopes (18O and 2H) in the Naqu River basin, the present paper developed a framework of the variable fuzzy evaluation model (VFEM) to provide a method to classify stable isotopes and generalize the source identification of water replenishment by rainfall or snowmelt in the Naqu River basin. The grade eigenvalues of tributaries were ranked from low to high as follows: 1, 1.005, 1.089, 1.151, 1.264, 1.455 and 2.624. Three sets of tributaries were distinguished. The grade eigenvalues of the Najinqu, Bazongqu, Mumuqu, Chengqu and Gongqu Rivers were small, indicating that these tributaries were strongly supplemented by precipitation and snowmelt; the grade eigenvalue of the Zongqingqu River was in the medium range (1.455); the third group included the Mugequ River with a high status value (2.624). This study mainly highlighted the combination of the classification of stable isotopes and plots of δ2H vs. δ18O in the source identification of water replenishment, which will be helpful for studying runoff replenishment and the evolution mechanism in the Qinghai-Tibet Plateau.

Hydrochemical characteristics of ground ice in permafrost regions of the Qinghai-Tibet Plateau

2018 ◽  
Vol 626 ◽  
pp. 366-376 ◽  
Author(s):  
Weihua Wang ◽  
Tonghua Wu ◽  
Lin Zhao ◽  
Ren Li ◽  
Changwei Xie ◽  
...  
Keyword(s):  
Tibet Plateau ◽  
Hydrochemical Characteristics ◽  
Ground Ice ◽  
Qinghai Tibet Plateau ◽  
Permafrost Regions

Effects of the freeze-thaw cycle on potential evapotranspiration in the permafrost regions of the Qinghai-Tibet Plateau, China

2019 ◽  
Vol 687 ◽  
pp. 257-266 ◽  
Author(s):  
Xin Liu ◽  
Wenjing Yang ◽  
Haipeng Zhao ◽  
Yibo Wang ◽  
Genxu Wang
Keyword(s):  
Potential Evapotranspiration ◽  
Tibet Plateau ◽  
Freeze Thaw ◽  
Thaw Cycle ◽  
Freeze Thaw Cycle ◽  
Qinghai Tibet Plateau ◽  
Permafrost Regions

Improving the Noah‐MP Model for Simulating Hydrothermal Regime of the Active Layer in the Permafrost Regions of the Qinghai‐Tibet Plateau

2020 ◽  
Vol 125 (16) ◽  
Author(s):  
Xiangfei Li ◽  
Tonghua Wu ◽  
Xiaofan Zhu ◽  
Yingsha Jiang ◽  
Guojie Hu ◽  
...  
Keyword(s):  
Active Layer ◽  
Tibet Plateau ◽  
Hydrothermal Regime ◽  
Qinghai Tibet Plateau ◽  
Permafrost Regions
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