Article
Meteorology & Atmospheric Sciences
Yigang Liu, Shihua Lyu, Cuili Ma, Yue Xu, Jiangxin Luo
Summary: In this study, the impact of gravel in a regional climate model was considered and evaluated. The addition of gravel in the simulation generally improved the model performance in simulating soil moisture, especially in the southeastern Tibetan Plateau. However, there is still room for improvement in simulating temporal variations of soil moisture at depths below 1.0 meters. The study also found that increasing gravel content may affect soil saturation conductivity and soil moisture content.
JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
(2021)
Article
Environmental Sciences
Yuan Yuan, Yaoming Ma, Chenyi Yang, Jinlei Chen, Hongchao Zuo, Jinying Tang
Summary: This paper proposes a new parameterization scheme, the organic carbon-gravel (OC-G) scheme, to simulate soil temperature and soil moisture on the Tibetan Plateau. The results show that after modifying the parameterization scheme, the correlation between the simulated and observed values is higher and the error is smaller. The experiment also finds that changes in soil organic carbon and gravel content have significant effects on soil temperature and moisture, with a cumulative effect when both change simultaneously, potentially altering summer weather and climate in Eastern China.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Xiaojie Wang, Zhiqiang Yu, Guofeng Shen, Hefa Cheng, Shu Tao
Summary: This study investigated the spatial distribution of bacterial communities in seasonally frozen soil on the Tibetan Plateau and their relationships with environmental factors. The results showed that soil depth had different impacts on bacterial diversity, composition, and specific taxa, which were mainly determined by various environmental factors.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Biying Liu, Qunli Tang, Yuke Zhou, Tao Zeng, Ting Zhou
Summary: This study redefined the sensitivity of vegetation to precipitation and temperature and found that climate change can lead to variations in vegetation sensitivity under specific threshold conditions.
Article
Agronomy
Luyang Wang, Guanli Jiang, Ziteng Fu, Yali Liu, Siru Gao, Hongting Zhao, Qingbai Wu
Summary: The thickness of the aeolian sand layer significantly influences the soil freeze-thaw process, ground temperature range, evapotranspiration, and heat budget on the Qinghai-Tibetan Plateau.
AGRICULTURAL AND FOREST METEOROLOGY
(2021)
Article
Environmental Sciences
Jialing Li, Chaoyang Wu, Mousong Wu, Yongguang Zhang, Youhua Ran
Summary: Climate warming has a significant impact on the freezing/thawing cycles of soil over the Tibetan Plateau, and the autumn phenology of vegetation may influence the start date of frozen soil through feedbacks to regional climates. By analyzing satellite data and microwave remote sensing, a negative relationship between the end of the growing season and the start date of frozen soil was found. A new algorithm based on this relationship significantly improved the estimation of the start date of frozen soil compared to current remote sensing-based methods. Overall, these results highlight the importance of feedbacks from autumn phenology on climate change.
REMOTE SENSING OF ENVIRONMENT
(2022)
Article
Biodiversity Conservation
Cong Yu, Li Xu, Mingxu Li, Nianpeng He
Summary: This study investigated the distribution and allocation patterns of phosphorus (P) in vegetation on the Tibetan Plateau (TP) and found significant differences among plant organs and the impact of radiation on P storage and allocation. The findings are important for ecosystem modeling.
ECOLOGICAL INDICATORS
(2022)
Article
Environmental Sciences
Bing-Rong Zhou, Liang Wu, Ming-Hua Song, Hua-Kun Zhou, Yi-Kang Li, Min Wang, Ting-Jun Zhang, Yu-Qian Yan, Hai-Juan Ji
Summary: This study analyzed the sensitivity of frozen soil depth and vegetation production across the Tibetan Plateau using long-term dataset. The results showed significant spatial heterogeneity in sensitivities, with precipitation having different effects on frozen soil sensitivities in different regions.
LAND DEGRADATION & DEVELOPMENT
(2021)
Article
Agronomy
Yichen Zhang, Songbai Hong, Dan Liu, Shilong Piao
Summary: The intensity and frequency of climate extreme events have increased significantly in the past decades, resulting in exceptional responses in terrestrial ecosystems. Understanding the vegetation growth responses to climate extremes is crucial but challenging. The Tibetan Plateau, with its fragile alpine ecosystems, provides an ideal region to study the various ecosystem responses to climate extremes. This study employed event coincidence analysis to detect the susceptibility of vegetation low-growth to four climate extremes (drought, extreme wet, extreme hot, and cold) using NDVI and SIF data from 2001 to 2018. The study found notable changes in vegetation susceptibility along climate gradients, with higher susceptibility to extreme hot in warmer regions and higher susceptibility to extreme cold in colder regions. Susceptibility to drought decreased with increasing precipitation, while susceptibility to extreme wet increased. Different vegetation types also showed varied susceptibility, with herbaceous plants being more susceptible to drought and extreme hot, and less susceptible to extreme wet and cold compared to woody plants. The findings highlight the ecological sensitive regions and the risk of decline in vegetation growth under warm-droughts on the Tibetan Plateau.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Ecology
Ting Hua, Wenwu Zhao, Francesco Cherubini, Xiangping Hu, Paulo Pereira
Summary: Protected areas (PAs) play a crucial role in global vegetation conservation, but their effectiveness varies in different regions. This study examined the conservation efficiency of nature reserves (NRs) on the Tibetan Plateau by focusing on vegetation greenness, cover, and productivity. The results indicated that NRs' edges have a weak but significant impact on vegetation growth, with around 40% of the areas showing a positive effect and 10% showing a negative effect. Fragmented landscapes and landforms were found to be more inhibitive to conservation efficiency than climatic and socio-economic factors.
LANDSCAPE AND URBAN PLANNING
(2022)
Article
Multidisciplinary Sciences
Yanfen Wang, Kai Xue, Ronghai Hu, Boyang Ding, Hong Zeng, Ruijin Li, Bin Xu, Zhe Pang, Xiaoning Song, Congjia Li, Jianqing Du, Xiuchun Yang, Zelin Zhang, Yanbin Hao, Xiaoyong Cui, Ke Guo, Qingzhu Gao, Yangjian Zhang, Juntao Zhu, Jian Sun, Yaoming Li, Lili Jiang, Huakun Zhou, Caiyun Luo, Zhenhua Zhang, Qingbo Gao, Shilong Chen, Baoming Ji, Xingliang Xu, Huai Chen, Qi Li, Liang Zhao, Shixiao Xu, Yali Liu, Linyong Hu, Jianshuang Wu, Qien Yang, Shikui Dong, Jinsheng He, Xinquan Zhao, Shiping Wang, Shilong Piao, Guirui Yu, Bojie Fu
Summary: This study utilized multivariate data fusion and deep learning to analyze the structural changes in plant communities in alpine grasslands on the Tibetan Plateau. The results revealed an increase in the proportion of alpine meadows, a strengthening of dominant vegetation types, and variations in the driving factors depending on the vegetation type.
Article
Soil Science
Lan Cuo, Haoqiang Zhao, Yongxin Zhang, Ning Li, Liqiao Liang, Zhe Liu, Jin Ding, Fuxin Zhu
Summary: This study investigates the complex and diverse thermohydraulic processes in frozen soils in the high altitudes and high latitudes. It reveals that dry and wet soils exhibit different freezing and melting behaviors, and seasonally frozen soil and permafrost soil also have distinct characteristics. These findings fill the knowledge gaps in the understanding of thermohydraulic processes in the high altitudes and high latitudes, and have implications for Earth system model development and the improvement of soil temperature and moisture remote sensing products.
Article
Environmental Sciences
Caixia Dong, Xufeng Wang, Youhua Ran, Zain Nawaz
Summary: The study reveals that heatwaves mainly occur in June, July, and August on the Tibetan Plateau, with no significant trends in frequency from 2000 to 2020. The intensity of heatwaves is negatively correlated with vegetation growth rate on the Tibetan Plateau.
Article
Biodiversity Conservation
Yusong Tang, Rui Chen, Jiangliu Xie, Dujuan Ma, Changjing Wang, Cong Wang, Qiaoyun Xie, Gaofei Yin
Summary: Leaf senescence velocity (LSV) plays a crucial role in regulating carbon and nutrient cycles within terrestrial ecosystems. In this study, we examined the LSV in the Tibet Plateau and found that it is influenced by climate drivers and has significant implications for vegetation growth and carbon exchange. Understanding the interactions between vegetation growth and climate change is important for advancing our knowledge in this field.
ECOLOGICAL INDICATORS
(2023)
Article
Biodiversity Conservation
Yi Wang, Jian Sun, Wen He, Chongchong Ye, Biying Liu, Youchao Chen, Tao Zeng, Shaoxiu Ma, Xiaoyu Gan, Chiyuan Miao, Huakun Zhou, Atsushi Tsunekawa
Summary: This study investigates the dominant factors of alpine vegetation distribution and predicts the future changes of vegetation boundary using climate models. The results show that precipitation plays a significant role in the distribution of alpine grasslands and reveal the migration of the grassland ecosystem under different climate change scenarios.
ECOLOGICAL INDICATORS
(2022)
Article
Meteorology & Atmospheric Sciences
Chenglong Xiao, Cheng Qian, Anning Huang, Ruixia Guo, Xueyuan Kuang
Summary: The relationship between winter cooling in Eurasia and Arctic amplification during the period 1998-2012 under global warming is controversial. Model simulations have been used to study this relationship, but evaluating the models is challenging due to internal variability. In this study, a dynamical adjustment method was applied to evaluate the performance of 11 models in simulating winter surface air temperature trends over Eurasia. The overall performance was poor, but improved after applying the adjustment method.
Article
Geosciences, Multidisciplinary
Shaobo Zhang, Lixia Meng, Yong Zhao, Xianyu Yang, Anning Huang
Summary: This paper analyzed the relationship between the TP monsoon index and summer precipitation in Central Asia, and found a significant positive correlation. The study revealed that when the TP monsoon was strong, it caused anomalies in the upper troposphere circulation and led to increased precipitation in Central Asia.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Meteorology & Atmospheric Sciences
Dongsheng Su, Lijuan Wen, Anning Huang, Yang Wu, Xiaoqing Gao, Mengxiao Wang, Yixin Zhao, Georgiy Kirillin
Summary: This study investigates the potential climatic impacts of lake clusters on glacier behavior over the Tibetan Plateau (TP) in summer using an air-lake coupled model. The study reveals that the influence of lakes on glaciers varies across different regions. Glaciers in the Himalayas are retreating rapidly due to climate warming, while in the Inner TP, the lakes partially offset the warming effects on glaciers through different mechanisms.
Article
Meteorology & Atmospheric Sciences
Ying Huang, Anning Huang, Jie Tan
Summary: Human activities have significantly impacted the Earth's climate through greenhouse gases, aerosol, and land use/land cover change. Using multi-model climate simulations, this study investigates the impact of forest changes on regional climate in China under different radiative forcing scenarios. The results show that deforestation has a more significant effect on climate under the low radiative forcing scenario, increasing air temperature and altering precipitation patterns. However, under the medium/high radiative forcing scenario, the effects are less pronounced, with a mix of increased and decreased precipitation across different time periods.
ADVANCES IN ATMOSPHERIC SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Xiaoke Xu, Anning Huang, Danqing Huang, Yan Zhang, Chunlei Gu, Shuxin Cai, Yong Tang, Zhizhan Zhao, Jingwen Zeng
Summary: Revealing synoptic patterns is crucial for understanding the formation of hourly extreme precipitation (EP). The dominant synoptic patterns associated with summer regional EP events over the central-eastern Tibetan Plateau and Sichuan Basin have been identified. These patterns are characterized by the configuration of the South Asia high and the Western North Pacific Subtropical High, with an additional low-level vortex for the Sichuan Basin. The frequency and intensity of these events have shown a significant increasing trend during 2000-2020.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geography, Physical
Yanlin Zhang, Xin Li, Xiaoli Chang, Huijun Jin, Anning Huang, Ji Liang, Guodong Cheng, Xin Wang
Summary: Downward solar radiation and air temperature have significant influences on the thermal state of frozen ground and are important for land surface models. This study investigates the sensitivity of simulated ground temperatures to different solar radiation and air temperature products, finding that GLDAS-SR leads to lower temperatures compared to in situ observations, while CMFD-SR and Tang-SR provide more accurate results. Air temperature products also introduce significant errors in simulated ground temperatures.
PERMAFROST AND PERIGLACIAL PROCESSES
(2023)
Article
Meteorology & Atmospheric Sciences
Anqi Liu, Danqing Huang, Anning Huang
Summary: This study investigates the intermodel spread of changes in the Eurasian winter surface air temperature based on CMIP6 and explains it from the perspective of circulation under shared socioeconomic pathway 2-4.5. Results show that the leading intermodel spread of Eurasian SAT change is characterized by a warming pattern associated with changes in circulation patterns. These changes in circulation can be attributed to warm sea surface temperature changes in the western North Pacific and tropical Atlantic Ocean, which could potentially reduce the intermodel uncertainties of winter SAT projection in the future.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Meteorology & Atmospheric Sciences
Yang Yang, Zhaohui Lin, Lifeng Luo, Linhao Zhong, Dabang Jiang
Summary: Land-atmosphere coupling is a critical process that influences surface air temperature over humid-dry transition zones. Through analyzing ERA5/ERA5-land reanalysis datasets, we find a significant correlation between summer temperature anomalies in Northwest China and land-atmosphere coupling strength from 1981 to 2020. Among the four pathways of land-air temperature coupling, the SM-sensible heat flux-air temperature pathway is most closely related to summer temperature changes. By analyzing physical links, we show that wave trains intensify westerly airflow over Eurasia, leading to convergence of moisture in Northwest China and causing excessive precipitation and deficient solar radiation, resulting in enhanced land-atmosphere coupling strength.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Meteorology & Atmospheric Sciences
Shuxin Cai, Anning Huang, Kefeng Zhu, Weidong Guo, Yang Wu, Chunlei Gu
Summary: We have incorporated a 3-dimensional sub-grid terrain solar radiative effect (3D STSRE) parameterization scheme into the Weather Research and Forecasting model (WRF_CPM). The scheme has shown to effectively reduce the overestimation of surface solar radiation and rainfall over the Tibetan Plateau and nearby regions, especially in areas with rugged terrain. Mechanism analyses suggest that the reduced surface heating lowers the intensity of the thermal-low pressure system, weakening the southwesterly winds and moisture convergence, and stabilizing the local atmosphere, which together alleviate the overestimation of precipitation over the southern Tibetan Plateau.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Geosciences, Multidisciplinary
Jingwen Zeng, Anning Huang, Peili Wu, Danqing Huang, Yan Zhang, Jian Tang, Dajun Zhao, Ben Yang, Shuang Chen
Summary: Based on the analysis of data from 1980 to 2020, this study identifies typical synoptic patterns responsible for extreme hourly precipitation events over the middle and lower Yangtze River basin during summer. The Meiyu front and landfalling typhoons are found to be the main contributors. The occurrence of extreme precipitation events shows a distinct diurnal pattern, with a peak in the morning for the strong Meiyu front pattern and a secondary peak in the late afternoon for the weak Meiyu front pattern.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Yaoming Song, Haishan Chen, Lin Wang, Anning Huang, Wei Gu, Yutong Ma
Summary: This study explores the lead-lag correlations between monthly near-surface air temperatures and reveals the influential factors and processes. The results show high lead-lag correlations of near-surface air temperatures in the middle and lower reaches of the Yangtze River basin, mainly due to the lead-lag relationships between soil temperatures. Net solar radiation is the main factor affecting the relationships between antecedent and current soil temperatures.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)