Article
Geosciences, Multidisciplinary
Anna Haberkorn, Robert Kenner, Jeannette Noetzli, Marcia Phillips
Summary: The Swiss Alps are experiencing rising temperatures, increasing precipitation, and accelerating degradation of mountain permafrost, with ice-poor areas being particularly affected. Thicker active layers and prolonged thaw periods are observed, pointing towards ongoing permafrost degradation in the future.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Environmental Sciences
Xin Gao, Kairong Lin, Meixian Liu, Chunyu Dong, Zeyu Yao, Zhiyong Liu, Mingzhong Xiao, Xue Xie, Liyan Huang
Summary: In this study, the modified surface frost number model was used to analyze the distribution and changes in permafrost in China from 1961 to 2017. The model performed well in simulating permafrost extent, showing a significant decreasing trend, especially on the Qinghai-Tibet Plateau. There is a strong relationship between ground surface temperature and permafrost distribution, and permafrost degradation has accelerated since the late 1980s. This study is significant for improving permafrost distribution simulation at large spatial scales and providing important information for adapting to climate change in cold regions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Gang Wu, Guoyu Li, Yapeng Cao, Dun Chen, Shunshun Qi, Fei Wang, Kai Gao, Qingsong Du, Xinbin Wang, Hongyuan Jing, Zhenrong Zhang
Summary: Human engineering activities and climate warming have led to permafrost degradation in the Da Xing'anling Mountains, which may have adverse effects on the distribution of permafrost and the safety of infrastructure. Using the electrical resistivity tomography method, this study investigates the distribution and degradation characteristics of permafrost and influencing factors near the China-Russia Crude Oil Pipeline. The results show that the isolated permafrost in this area is vulnerable to degradation due to warm oil pipelines and thermal erosion.
Article
Environmental Sciences
R. G. Way, C. M. Lapalme
Summary: This study utilized simulations to demonstrate that increased upright vegetation in northern environments, leading to enhanced snow trapping, has a greater impact on ground surface temperatures compared to cooling effects from shading.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Biodiversity Conservation
Tian Chen, Hao-jie Xu, Xiao-lian Qi, Shu-yao Shan, Sheng-yun Chen, Yan-fang Deng
Summary: The study investigated the spatiotemporal variations of alpine vegetation pattern and growth in the Shule River headwater region using satellite remote sensing, and found shrinking trends in alpine grassland and wetland area, while an expanding trend in alpine desert area. Vegetation patches became fragmented and complex, and vegetation growth increased significantly in certain areas. The vegetation NDVI was positively correlated with root-zone soil moisture and grazing intensity.
GLOBAL ECOLOGY AND CONSERVATION
(2022)
Article
Environmental Sciences
Hanrui Zhao, Peng Yi, Xicai Pan, Chengwei Wan
Summary: This study explores the interaction between permafrost degradation and climate warming on vegetation green-up, focusing on the role of freezing-induced root zone soil moisture return (SMR). Through analyzing soil-weather monitoring data in high altitude and high-latitude permafrost regions, the study finds that SMR is an important water source for vegetation green-up, with varying sensitivities to climate warming and permafrost degradation at different sites.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Ping Wang, Qiwei Huang, Shiqi Liu, Hongyan Cai, Jingjie Yu, Tianye Wang, Xiaolong Chen, Sergey P. Pozdniakov
Summary: The warming rates of permafrost zones in the northern mid-high latitudes are faster than those of non-permafrost zones, especially during the cool season. However, the maximum and minimum temperatures have shown decreasing trends in non-permafrost areas over the past decade, and the exposure to solar radiation is not higher in faster-warming permafrost regions compared to slower-warming non-permafrost regions.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Environmental Sciences
Arthur Bayle, Alexandre Roy, Jean-Pierre Dedieu, Stephane Boudreau, Philippe Choler, Esther Levesque
Summary: Arctic vegetation cover has been increasing over the last 40 years, with two significant waves of greening observed in north-eastern Canada in 1996 and 2011. The first wave was more intense and correlated with increasing summer temperature, while the second wave was weaker and not related to summer temperature.
ENVIRONMENTAL RESEARCH LETTERS
(2022)
Article
Plant Sciences
Jie Zhao, Kunlun Xiang, Zhitao Wu, Ziqiang Du
Summary: This study investigates the spatiotemporal variations in the relationship between vegetation greenness and day- and night-time warming globally. The findings indicate a generally weakening warming effect on vegetation activity, with a decline in vegetation response to maximum temperature mainly in mid-latitudes and high latitudes of the northern hemisphere, and a decline in response to minimum temperature primarily in low latitudes.
Article
Geography, Physical
Qinxue Wang, Tomohiro Okadera, Masataka Watanabe, Tonghua Wu, Batkhishig Ochirbat
Summary: The response of permafrost to climate change in different terrestrial ecosystems was studied by establishing a monitoring network in North-central Mongolia. The results showed that permafrost degradation was more pronounced in ice-rich areas and wetland ecosystems, while the steppe ecosystem experienced the most rapid permafrost degradation. Correlation analysis revealed the association between climatic factors and permafrost indicators, such as precipitation and soil water content with active layer thickness, and relative humidity with mean annual ground temperature.
PERMAFROST AND PERIGLACIAL PROCESSES
(2022)
Article
Geosciences, Multidisciplinary
Nitin Chaudhary, Wenxin Zhang, Shubhangi Lamba, Sebastian Westermann
Summary: In this study, the peatland-vegetation model (LPJ-GUESS) was used to simulate peatland carbon dynamics under different future climate conditions. It was found that under less pronounced warming, peatlands may enhance their carbon sink capacity and buffer the effects of climate change. However, in a warmer world, higher respiration rates will dominate the carbon dynamics and reduce the carbon sink capacity.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Ecology
Xing Chen, Sujong Jeong
Summary: This study investigated the effects of surface thaw onset change on vegetation growth in the Arctic permafrost region from 1982 to 2016. The results showed that earlier thaw onset may have a positive effect on vegetation growth during the early stage of the growing season, but it can limit vegetation growth during the late stage of the growing season. This difference can be explained by moisture availability.
GLOBAL ECOLOGY AND BIOGEOGRAPHY
(2023)
Article
Engineering, Civil
Ping Wang, Qiwei Huang, Qi Tang, Xiaolong Chen, Jingjie Yu, Sergey P. Pozdniakov, Tianye Wang
Summary: Increased attention to precipitation changes in permafrost-dominated Siberia is driven by intensified flooding and climate warming. Observations over 60 years show significant changes in annual and extreme precipitation, with non-permafrost zones experiencing higher average annual precipitation and extreme events than permafrost zones. Despite this, the rate of increase in precipitation and extreme events is higher in permafrost zones compared to non-permafrost zones.
JOURNAL OF HYDROLOGY
(2021)
Article
Geosciences, Multidisciplinary
Raul-David Serban, Giacomo Bertoldi, Huijun Jin, Mihaela Serban, Dongliang Luo, Xinze Li
Summary: This study aims to detect the variability of ground surface temperature (GST) in the Headwater Area of the Yellow River. The results show a significant correlation between mean annual GST and land cover as well as elevation. At the local/landscape scale, meadows have higher GST than swamp meadows and bare grounds. At the fine scale, there is a high similarity in GST between plots but with some degree of error. The decrease of GST is more pronounced in bare grounds with rising elevation.
Article
Environmental Sciences
Shengting Wang, Tianni Xu, Yu Sheng, Yiming Wang, Shuming Jia, Long Huang
Summary: In this study, we investigated the influence of open-pit coal mining on vegetation coverage degradation in permafrost areas based on a field survey in the Juhugen mining area of Qilian Mountain, China. The results showed significant vegetation degradation in the coal-mining-affected area, especially in areas with high vegetation coverage.
Article
Neurosciences
Liwei Sun, Chunlin Li, Songjian Wang, Qian Si, Meng Lin, Ningyu Wang, Jun Sun, Hongjun Li, Ying Liang, Jing Wei, Xu Zhang, Juan Zhang
Summary: This study investigated the neural representation of sound locations in high-level regions using various analysis methods. The results showed that besides the auditory cortices, regions such as the intraparietal sulcus, superior parietal lobule, and frontal eye field were also activated to different extents by sound locations. Additionally, both hemispheres of the auditory cortices and the left frontal eye field exhibited a multivariate pattern representation of sound locations.
Article
Computer Science, Information Systems
Menghui Wu, Jingjing Guo, Chunlin Li, Youlong Luo
Summary: The paper focuses on cache optimization and service selection algorithms in the cloud-edge environment. A cache optimization model based on popularity is proposed to solve the problem of cached content in edge servers considering factors such as energy consumption and cost. For service selection, a Q-learning-based algorithm is proposed to address the dynamic task allocation and Qos optimization in the edge computing environment. Experimental results show that the proposed algorithms can significantly improve cache hit ratio, minimize transmission overhead, and ensure server load balancing in the cloud-edge environment.
Article
Computer Science, Information Systems
Qingzhe Zhang, Chunlin Li, Yong Huang, Youlong Luo
Summary: This paper proposes a framework for multi-access edge computing systems based on software-defined networking and a reliable placement method. It also introduces a mobile-aware service adaptive deployment method. Experimental results show that the proposed algorithm can optimize the quality of user experience.
Article
Computer Science, Artificial Intelligence
Chunlin Li, Yong Zhang, Youlong Luo
Summary: Computation-intensive and time-delay-sensitive tasks are growing rapidly, leading to higher requirements for mobile user devices. To address this, a mobile edge computing system is needed. However, in this system, the lack of popular cached content in the edge server leads to delays and backhaul link load. To tackle this, this article proposes a content caching policy using DQN to optimize the caching scheme. Additionally, a quantum ant colony based computing offloading strategy is introduced to improve computing capacity and consider delay, energy consumption, and server cost.
APPLIED SOFT COMPUTING
(2023)
Article
Computer Science, Information Systems
Chunlin Li, Yong Zhang, Youlong Luo
Summary: This paper introduces the impact of controller deployment solutions on the service quality of SDN and proposes a multi-controller deployment algorithm based on network partition and a collaborative task scheduling algorithm based on dependency relationship. The experiments show that both algorithms can effectively reduce latency and improve efficiency.
CLUSTER COMPUTING-THE JOURNAL OF NETWORKS SOFTWARE TOOLS AND APPLICATIONS
(2023)
Article
Biodiversity Conservation
Jieming Kang, Chunlin Li, Baolei Zhang, Jing Zhang, Meirui Li, Yuanman Hu
Summary: Understanding the mechanisms influencing changes in ecosystem services is crucial for sustainable ecosystem management. This study quantified six ecosystem services for the Yangtze River Delta and Pearl River Delta in 2000 and 2020. It identified the importance of different factors influencing these services and explored their spatial and temporal heterogeneity. The results showed a shift from natural factors to human factors dominating the regional ecosystem services. The study provides important scientific guidance for enhancing ecological sustainability in developed regions.
ECOLOGICAL INDICATORS
(2023)
Review
Chemistry, Applied
Chunlin Li, Xuming Kang, Jing Nie, An Li, Mohamed A. Farag, Cuiling Liu, Karyne M. Rogers, Jianbo Xiao, Yuwei Yuan
Summary: Over the last decade, isotope ratio mass spectrometry (IRMS) using multiple light stable isotopes has been widely applied in China for food origin verification and authentication. It has successfully characterized and identified Chinese food products, reducing fraud, improving food safety, and enhancing consumer trust and government regulatory policies.
Article
Engineering, Chemical
Wenjie Li, Shibo Wang, Hua Wang, Chunlin Li, Yuling Zhai, Jianxin Xu, Qingtai Xiao
Summary: The effect of an eccentric impeller on fluid mixing efficiency was investigated through numerical simulations and experiments. The results showed that the eccentric impeller can improve purification efficiency and reduce energy consumption.
INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING
(2023)
Article
Engineering, Chemical
Xinrui Dai, Chunlin Li, Shibo Wang, Hua Wang, Jianxin Xu, Qingtai Xiao, Yuewei Fan
Summary: The rotation plus revolution (RPR) stirring method achieves chaotic mixing by inducing a specific chaotic state in the fluid, which disrupts isolated mixing regions. RPR significantly improves reaction rates by increasing effective collision probabilities. Compared to eccentric rotation (ER) and orbital rotation (OR), RPR achieved a purification rate of 96.9% in 60 minutes, which was 37.8% and 35.1% higher, respectively. RPR also had higher energy utilization and lower unit ion purification energy compared to ER and OR, resulting in improved purification efficiency with reduced energy consumption.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Construction & Building Technology
Chuyi Zhang, Yuanman Hu, Matthew D. Adams, Rencang Bu, Zaiping Xiong, Miao Liu, Yan Du, Binglun Li, Chunlin Li
Summary: In this study, the spatial-temporal characteristics of PM exposure risk in Shenyang were analyzed using landscape patterns and data from land use, cell phone signaling, and PM mobile monitoring. The results showed different spatial distributions of PM on weekdays and weekends, with lower exposure risk on weekends. The study also identified the key factors influencing PM exposure risks.
SUSTAINABLE CITIES AND SOCIETY
(2023)
Article
Construction & Building Technology
Hongchao Xu, Chunlin Li, Yuanman Hu, Shuai Li, Ruixue Kong, Zhibin Zhang
Summary: With the continuous development of urbanization, the 2D landscape pattern is insufficient to explain complex urban thermal phenomenon. The relationship between 2D/3D urban patterns and land surface temperature (LST) in cities of different sizes has been analyzed. The study found that with the increase in city size, LST gradually increased in summer and decreased in winter. Factors such as tree volume, mean tree height, and impervious surface patch index significantly influenced LST.
BUILDING AND ENVIRONMENT
(2023)
Article
Computer Science, Hardware & Architecture
SenXing Lu, Mingming Zhao, Chunlin Li, Quanbing Du, Youlong Luo
Summary: This article proposes an efficient strategy to address the problems of data partitioning and job scheduling in the Spark framework. It introduces a balanced partitioning strategy for intermediate data and a task scheduling algorithm using a greedy strategy. Experimental results show that these strategies effectively improve system task processing efficiency and decrease overall task completion time.
Article
Materials Science, Multidisciplinary
Chunlin Li, Xiaoshun Zhang, Yang Lu, Yiting Shan, Hongqing Zhou
Summary: The effects of Nd2O3 addition on the crystallinities, microstructures, and properties of MgO-Al2O3-SiO2 (MAS) glass-ceramics were studied. It was found that the addition of Nd2O3 allowed for complete sintering of the MAS at lower temperatures. Appropriate addition ratios increased the crystallinity and promoted the formation of Indialite, resulting in improved microstructure, reduced thermal expansion coefficient, and optimized dielectric properties. The best performance was achieved by adding 4 wt% Nd2O3 to the MAS sample and sintering at 1255 degrees C for 15 min, with a bulk density of 2.51 g cm(-3), epsilon(r) = 6.50, tan delta = 1.96 x 10(-3) (13 GHz), and CTE = 4.621 ppm degrees C-1.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Environmental Sciences
Kongming Li, Chunlin Li, Yuanman Hu, Zaiping Xiong, Yongheng Wang
Summary: This study estimated the annual PM2.5 removal capacity of urban green infrastructure (UGI) from 2000 to 2019 in Shenyang and explored the effects of landscape patterns and socioeconomic variables on PM2.5 removal capacity. The results showed a significant increase in PM2.5 removal capacity of UGI in Shenyang, with spatial heterogeneity across the study area. Landscape metrics representing fragmentation and shape complexity positively affected the PM2.5 removal flux and removal rate, while aggregation metrics had negative correlations. Population density and GDP negatively affected the PM2.5 removal capacity of UGI.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Computer Science, Information Systems
Shuai Chang, Chunlin Li, Chunping Deng, Youlong Luo
Summary: To address the issue of load balancing in multi-SDN controllers, a low-latency controller load balancing switch migration algorithm is proposed. It consists of a load monitoring module, a decision-making module, and a switch migration module. By migrating the switch with the highest load to a controller with better processing capacity and shorter distance, load balancing is achieved. Additionally, an offloading decision-generation algorithm based on Lyapunov optimization is proposed to consider the stability of the MEC system and maximize its profit while meeting stability and delay requirements.
CLUSTER COMPUTING-THE JOURNAL OF NETWORKS SOFTWARE TOOLS AND APPLICATIONS
(2023)
