Article
Environmental Sciences
Dechao Zhai, Xizhang Gao, Baolin Li, Yecheng Yuan, Yuhao Jiang, Yan Liu, Ying Li, Rui Li, Wei Liu, Jie Xu
Summary: Determining the driving climatic factors at critical periods is crucial for predicting grassland productivity on the Qinghai-Tibet Plateau. This study used remote sensing techniques to determine key factors at critical plant developmental stages and the impact of previous plant growth status on interannual aboveground net primary productivity variations in different grassland types.
Article
Biodiversity Conservation
Dongdong Qiu, Yanpeng Zhu, Hua Zhang, Mengdi Fu, Yueheng Ren, Junsheng Li
Summary: Strong earthquakes can have negative effects on alpine wetlands, leading to changes in environmental conditions and causing the decline or loss of wetland restoration abilities. This study found that the infiltration of surface water during an earthquake resulted in the die-off of aquatic plants and snails, decrease in water bird abundance, and habitat degradation. It also revealed the potential of dried and degraded alpine wetlands to contribute to soil desertification. The findings emphasize the need for earthquake fissure restoration, supplementation of surface water, plants, and macrobenthos to protect biodiversity and restore alpine wetlands.
ECOLOGICAL INDICATORS
(2022)
Article
Plant Sciences
Shuai An, Xiaoqiu Chen, Miaogen Shen, Xiaoyang Zhang, Weiguang Lang, Guohua Liu
Summary: This study examines the interspecific difference in spring and autumn phenology response to climate change among five high mountain herbs in the eastern Qinghai-Tibet Plateau. Results show that while green-up dates were not significantly shifted, brown-off dates were significantly delayed with warming. The difference in brown-off dates among species increased significantly over time, indicating complex responses to future climate change and potential alteration of the alpine plant community.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Wensi Ma, Tonghua Wu, Xiaodong Wu, Sizhong Yang, Ren Li, Shiqiao Zhou, Xiangfei Li, Xiaofan Zhu, Junming Hao, Jie Ni, Dong Wang
Summary: This study investigated the carbon budgets of four ecosystems (alpine meadow, steppe, forest, and cropland) on the Tibetan Plateau from 2004 to 2017. The results showed that forest, cropland, and alpine meadow ecosystems acted as carbon sinks, while alpine steppe and overmature forest ecosystems served as carbon sources. The temperature sensitivity of carbon emissions was higher in the forest and alpine steppe ecosystems compared to the alpine meadow ecosystems. Multiple linear regression analysis revealed that water forcing was the main predictor for carbon fluxes in alpine steppe and alpine meadow ecosystems, while temperature forcing was the main predictor in forest and cropland ecosystems.
Article
Environmental Sciences
Runhong Xu, Zhigang Wang, Jinfu Zhu
Summary: In the alpine wetland of Qinghai Lake basin, nitrogen addition resulted in a decrease in soil organic carbon (SOC), mainly due to changes in soil microorganisms. Proteobacteria, Chloroflexi, Acidobacteria, and Actinobacteria were the dominant microbial taxa, and their relative abundance was influenced by nitrogen addition. The abundance and diversity of soil bacteria played a crucial role in the decomposition capacity, which affected SOC content.
Article
Biodiversity Conservation
Xiao-Yan Li, Fang-Zhong Shi, Yu-Jun Ma, Shao-Jie Zhao, Jun-Qi Wei
Summary: The study presents the first long-term direct measurement of CO2 flux over Qinghai lake, revealing that the ice-covered period absorbs more CO2 from the atmosphere compared to the ice-free period. Saline lakes on the Qinghai-Tibet Plateau were found to be a significant sink for CO2, accounting for approximately one third of the net carbon sink in the terrestrial ecosystems.
GLOBAL CHANGE BIOLOGY
(2022)
Article
Agronomy
Yazhuan Sang, Shangzhao Yu, Fengshuai Lu, Yi Sun, Shulin Wang, Luji Ade, Fujiang Hou
Summary: This study explores the potential of using UAV technology for monitoring soil moisture in grasslands and demonstrates the correlation between visible-light brightness, vegetation coverage, rainfall reduction, aboveground biomass, and topsoil moisture.
Article
Green & Sustainable Science & Technology
Xiuying Wang, Yuancang Ma, Fu Li, Qi Chen, Shujiao Sun, Honglu Ma, Rui Zhang
Summary: Through infrared wetland research and machine learning, we constructed a predictive model for net ecosystem CO2 exchange (NEE) and studied the effect of outlier treatments in different seasons on the model. The results showed that outlier treatments improved the interpolation accuracy and data quality of NEE, and the multilayer perceptron (MLP) model was the most stable with the best interpolation effect. Additionally, there were seasonal differences in the prediction of NEE.
Article
Water Resources
Zhongkai Li, Xiaoyan Li, Shuhui Yang
Summary: This study focuses on the impact of vegetation dynamic induced change on catchment water yield in Qinghai Lake Basin. By using ecohydrological models, water balance methods, and surface runoff experiments, it is found that plant drought adaptation strategies can significantly affect water yield. Plants employing drought-avoiding strategy have higher water yield, while plants adopting drought-tolerating strategy have higher productivity. These findings offer important insights into the biological mechanism of water yield regulation by vegetation and provide guidance for watershed management.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2023)
Article
Environmental Sciences
Xiaoting Wei, Lu Yu, Bing Han, Kesi Liu, Xinqing Shao, Shangang Jia
Summary: Exploring the geospatial variation of root-associated microbiomes is vital in understanding the interactions between plants, microbes, and the environment. This study investigated the root-associated bacterial communities of four dominant alpine plants across 11 geographical locations on the Qinghai-Tibet Plateau. The results showed significant differences in community composition among the different compartments of the root, with spatial variation mainly driven by stochastic processes in the root endosphere. The study also revealed that geographical location had a greater impact on bacterial communities than plant species and that the alpha-diversity in the root endosphere exhibited higher spatial variation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Jianliang Liu, Wei Zhan, Xinya Huang, Di Tang, Shaofei Jin, Dan Zhu, Huai Chen
Summary: Soil carbon sequestration is important for mitigating climate change. Nitrogen deposition affects soil carbon dynamics by altering carbon input and output. This study investigated the impact of nitrogen addition on soil carbon stocks and identified the mechanisms in an alpine meadow. After six years of nitrogen addition, the total carbon stocks in the topsoil significantly increased, with microbial biomass carbon content playing a key role. Nitrogen addition also affected aboveground biomass and organic matter decomposition.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biodiversity Conservation
Yi Yang, Dongsheng Zhao, Hui Chen
Summary: This study proposes a new framework for quantifying the ecological carrying capacity in vulnerable ecoregions and analyzes it on the Qinghai-Tibet Plateau. The results show variations in vegetation cover requirements and aboveground net primary production across different regions, resulting in varying ecological carrying capacity.
ECOLOGICAL INDICATORS
(2022)
Article
Geosciences, Multidisciplinary
Zhao Pan, Rui Ma, Ziyong Sun, Yalu Hu, Qixin Chang, Mengyan Ge, Shuo Wang, Jianwei Bu, Xiang Long, Yanxi Pan, Lusong Zhao
Summary: Climate warming has significantly altered the hydrological cycle in cold regions, particularly those with permafrost or seasonal frost. However, due to challenges such as remote locations and harsh work conditions, there have been limited long-term field observations and modeling efforts on groundwater dynamics. This study presents a dataset spanning 6 years of monitoring groundwater levels and temperatures, as well as analyzing water samples from various sources in the Hulugou catchment on the Qinghai-Tibet Plateau, providing valuable information for understanding groundwater processes and interactions with surface water under global climate change.
EARTH SYSTEM SCIENCE DATA
(2022)
Article
Environmental Sciences
Chong Wang, Lin Zhao, Hongbing Fang, Lingxiao Wang, Zanpin Xing, Defu Zou, Guojie Hu, Xiaodong Wu, Yonghua Zhao, Yu Sheng, Qiangqiang Pang, Erji Du, Guangyue Liu, Hanbo Yun
Summary: This study successfully mapped the surficial soil PSF distribution in two typical permafrost regions in the Qinghai-Tibet Plateau using log-ratio transformation approaches, variable searching methods, and machine learning techniques. Variable selection techniques effectively reduced data redundancy and improved model performance, with isometric log-ratio random forest (ILR-RF) outperforming other models in both regions. The prediction in this study captured the spatial pattern of PSFs more accurately compared to three legacy datasets, showing potential for better understanding the interaction and processes between environmental predictors and soil PSFs in permafrost regions.
Article
Engineering, Civil
Fenglin Zuo, Xiaoyan Li, Xiaofan Yang, Fangzhong Shi, Yujun Ma, Wei Ouyang
Summary: This study investigates the influence of subsurface critical zone structure on water storage in alpine regions. The results show that the saprolite layer is the main reservoir of subsurface liquid water storage and that both the subsurface layer and elevation contribute significantly to water storage. Moreover, seasonal frozen thickness and precipitation are the dominant factors affecting water storage during different periods.
JOURNAL OF HYDROLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
Lele Zhang, Lin Zhao, Changwei Xie, Guangyue Liu, Liming Gao, Yao Xiao, Jianzong Shi, Yongping Qiao
ADVANCES IN METEOROLOGY
(2015)
Article
Environmental Sciences
Wang Zhi-wei, Wang Qian, Zhao Lin, Wu Xiao-dong, Yue Guang-yang, Zou De-fu, Nan Zhuo-tong, Liu Guang-yue, Pang Qiang-qiang, Fang Hong-bing, Wu Tong-hua, Shi Jian-zong, Jiao Ke-qin, Zhao Yong-hua, Zhang Le-le
JOURNAL OF MOUNTAIN SCIENCE
(2016)
Article
Engineering, Environmental
Guangyang Yue, Lin Zhao, Zhiwei Wang, Lele Zhang, Defu Zou, Li Niu, Yonghua Zhao, Yongping Qiao
ENVIRONMENTAL ENGINEERING SCIENCE
(2017)
Article
Environmental Sciences
Lu Ma, Lin Zhao, Li-ming Tian, Li-ming Yuan, Yao Xiao, Le-le Zhang, De-fu Zou, Yong-ping Qiao
JOURNAL OF MOUNTAIN SCIENCE
(2019)
Article
Environmental Sciences
Lu Ma, Lin Zhao, Daqing Yang, Yao Xiao, Lele Zhang, Yongping Qiao
Article
Chemistry, Multidisciplinary
Liming Gao, Lele Zhang, Yongping Shen, Yaonan Zhang, Minghao Ai, Wei Zhang
Summary: Accurate simulation of snow cover process using CMFD and ERA-Interim driving data was conducted for the Irtysh River Basin, with STC scheme having the most significant impact on the results. Snow depth and snow water equivalent were found to be higher in the north compared to the south, and the simulated snow depth accuracy was higher than LSD and CSS based on microwave remote sensing.
APPLIED SCIENCES-BASEL
(2021)
Article
Meteorology & Atmospheric Sciences
Lele Zhang, Liming Gao
Summary: Quantifying drought and wetness fluctuations on the Qinghai-Tibetan Plateau is crucial for the regional ecological environment and water resource security. The study found that the plateau as a whole tended to be wetter, but there were significant drying trends in certain regions. Temperature and precipitation variability had different impacts on the SPEI trend, with precipitation playing a larger role in influencing drought and wetness changes.
ADVANCES IN METEOROLOGY
(2021)
Article
Environmental Sciences
Le-le Zhang, Li-ming Gao, Ji Chen, Lin Zhao, Ke-long Chen, Jing-yi Zhao, Guo-jun Liu, Ting-xi Song, Yan-kun Li
Summary: Accurately measuring precipitation is crucial for understanding water cycle processes and assessing climate change. This study conducted a measurement intercomparison experiment between two commonly used precipitation gauges in the Qinghai-Tibet Plateau and evaluated the performance of different transfer functions. The results indicate that some transfer functions can accurately adjust precipitation, while there are underestimation issues for snowfall and overestimation issues for rainfall with existing transfer functions.
JOURNAL OF MOUNTAIN SCIENCE
(2022)
Article
Water Resources
Lele Zhang, Liming Gao, Ji Chen, Lin Zhao, Jingyi Zhao, Yongping Qiao, Jianzong Shi
Summary: This study evaluated the accuracy of six mainstream gridded precipitation products in the cold season of the Tibetan Plateau. The results showed that high precipitation occurred in the eastern and southeastern regions, while low precipitation occurred in the Qaidam Basin. There were spatial pattern differences among the six products, with CMFD having the highest accuracy and CHIRPS having the lowest accuracy.
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
(2022)
Article
Nanoscience & Nanotechnology
Jianyu Guo, Guoquan Nie, Jinxi Liu, Lele Zhang
Summary: This study investigates the free vibration of a piezoelectric bi-layered plate consisting of a piezoelectric semiconductor layer and a piezoelectric dielectric layer. The effects of steady-state electron density, axial force, and geometric parameters on vibration frequency and modes are discussed. The results obtained may be useful for theoretical analysis and practical application of piezotronic devices made from these materials.
Article
Environmental Sciences
Limimg Gao, Yaonan Zhang, Lele Zhang
Summary: This study validates and analyzes the surface net radiation (RN) data of the Tibetan Plateau from China Meteorological Administration Global Land Surface Reanalysis Products (CRA/Land) and ECMWF Land Surface Reanalysis version 5 (ERA5-Land). The results show differences between CRA/Land and ERA5-Land in terms of performance, spatial distribution, and the consistency of the components of RN. The inconsistent data of upwelling shortwave radiation (USR) is the main reason for the differences in spatiotemporal distribution.
Article
Green & Sustainable Science & Technology
Xueqing Wu, Lele Zhang, Liming Gao, Yankun Li, Xuanchen Liu
Summary: This study utilized InVEST and CASA models to estimate four ecosystem services in Qinghai Lake Basin between 2000 and 2018, and revealed their relationships using LISA and TSC. The results showed that water conservation capacity, soil retention, habitat quality, and carbon storage services all increased during this time period. The study aims to compensate for previous research deficiencies and provide a reference for the sustainable development of the basin.
Article
Environmental Sciences
Lei Wang, Xufeng Mao, Xiuhua Song, Xiaoyan Wei, Hongyan Yu, Shunbang Xie, Lele Zhang, Wenjia Tang
Summary: In this study, soil samples were collected from three zones of Huangshui National Wetland Park in order to determine the concentrations of heavy metals. The ecological risk of these heavy metals was evaluated using the geo-accumulation index, and the effectiveness of the Xining urban wetlands in controlling heavy metal pollution was explored through comparative analysis. The possible sources of heavy metals in the soil were analyzed using correlation analysis and principal component analysis.
Proceedings Paper
Geosciences, Multidisciplinary
Xueqing Wu, Jiang Gang, Lele Zhang
Summary: Landscape pattern change in Daqing City reflects the interaction between human activities and the natural environment. The results show an increase in construction land and forest land, and a decrease in grassland, cultivated land, and unused land. The landscape fragmentation and heterogeneity have decreased, while landscape diversity has increased. Population and policy factors are the main drivers of landscape pattern change in Daqing City.
2022 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS 2022)
(2022)