Article
Construction & Building Technology
Yi Ju, Xinyuan Ju, Hui Zhang, Bin Cao, Bin Liu, Yingxin Zhu
Summary: In this paper, the feasibility, robustness, and optimization of introducing personal comfort systems (PCS) into a broader range of environments are investigated. The effect of personalized heating in neutralizing individual, spatial, and temporal variations of thermal demands is examined through laboratory experiments. The results indicate that active heating can significantly and stably improve thermal satisfaction, with preferred heating surface temperatures varying widely among different segments and individuals.
BUILDING AND ENVIRONMENT
(2023)
Article
Engineering, Civil
Xuechen Jiang, Jing Zhang, Xiaohui Lei
Summary: By analyzing the precipitation data of Xinjiang from 1961 to 2017, it was found that extreme precipitation events showed an increasing trend in both time and space. The spatial distribution of extreme precipitation was significantly influenced by the topography, with a clear heterogeneity. The study also revealed a significant correlation between Western Pacific Subtropical High Intensity Index and extreme precipitation events in Xinjiang.
JOURNAL OF HYDROLOGIC ENGINEERING
(2023)
Article
Biodiversity Conservation
Hangyu Xie, Jiaorong Lyu, Yuhai Bao, Yantong Yu, Yu Li, Xiaolan Zheng, Xiubin He
Summary: The study observes the nearshore significant wave height (SWH) in the Three Gorges Reservoir using RBRvirtuoso Dwave-pressure-based wave gauges. It analyzes the factors affecting SWH under different water levels, in the main and tributary streams, and shoreline sections. The study finds that SWH increases with higher water levels, and the average SWH in the mainstream is larger than in the tributaries. Fluctuations in water level, shipping activities, and other factors significantly impact the alteration of nearshore SWH, which can lead to changes in shoreline erosion patterns and environmental pollution.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Sciences
Qin Yang, Jianhua Wang, Dawen Yang, Dianyi Yan, Yiyang Dong, Zefan Yang, Miao Yang, Pu Zhang, Peng Hu
Summary: This study analyzes the observations from the cold region of northeast China (CRNEC) and finds significant temporal and spatial variations in ET0. Results show an increasing trend in ET0 over the study period, although there are also stations with decreasing trends. The study also identifies the major factors controlling the change in ET0 before and after 1994, as well as the correlation between ET0 and meteorological and teleconnection factors.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Ziqi Chen, Yanhong Zhang
Summary: With rapid urbanization, the urban heat island (UHI) effect is becoming more pronounced. This study focuses on identifying and evaluating the temporal-spatial variations and driving factors of UHI in Changchun city, Jilin province, in Northeast China. By utilizing satellite images and ancillary data, this study analyzes the variations of UHI effect over time and space, as well as its relation with urban development. The findings reveal the temporal variations of UHI based on air temperature and the spatial variations of UHI based on land surface temperature. The study emphasizes the importance of urban land planning for mitigating UHI effect and promoting sustainable urban development.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2022)
Article
Soil Science
Qi Chen, Zeyan Zhou, Sulin Cai, Meiqi Lv, Yinghui Yang, Yunchao Luo, Han Jiang, Run Liu, Tingting Cao, Bei Yao, Yunru Chen, Qiang Li, Xiaoyi Zeng, Rumeng Ye, You Fang, Yueting Pan, Weihua He, Lu Pang, Hualong He, Pengwei Wan, Yanli Ji, Changzhong Li, Cheng Jin, Aliya Baidourela, Jiaqin Zeng, Gaozhong Pu, Siyuan Chen, Jiawen Liang, Xingjun Tian
Summary: This study investigates the decomposition potential of soil organic matter across different climate types in China using standardized materials. The results show that temperature and precipitation variations significantly affect the decomposition rate. The study also finds that decomposers in high latitude areas have a stronger decomposition ability.
SOIL & TILLAGE RESEARCH
(2024)
Article
Multidisciplinary Sciences
Lichuan Wang, Jianhua Wang, Fan He, Qingming Wang, Yong Zhao, Peiyi Lu, Ya Huang, Hao Cui, Haodong Deng, Xinran Jia
Summary: Climate warming leads to frequent extreme precipitation events, which is a prominent manifestation of the variation of the global water cycle. This study analyzes the historical and future precipitation data in the Huang-Huai-Hai-Yangtze River Basin using meteorological station data and climate models. The results show that extreme precipitation indices are significantly correlated with precipitation and geographical factors, and areas above 3000 m above sea level are more sensitive to climate change.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Shidong Liu, Jishang Xu, Lulu Qiao, Guangxue Li, Jinghao Shi, Dong Ding, Di Yu, Xue Yang, Yufeng Pan, Siyu Liu, Xiaoshuang Fu
Summary: In this study, the basic features and spatial-temporal variations of short-lived mesoscale eddies (MEs) in the western Pacific warm pool (WPWP) were analyzed for the first time. It was found that short-lived cyclonic and anticyclonic eddies (CEs/AEs) were widespread in two eddy belts in the tropical region. The development of these eddy belts was related to the variations in sea surface temperature, mixed layer depth, and surface chlorophyll-a concentration in the WPWP. This new insight contributes to our current understanding of ocean eddies and highlights the importance of studying the impacts of short-lived MEs in future research.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Green & Sustainable Science & Technology
Xiaoyan Liang, Zhenmin Niu, Xiaolong Li
Summary: This study analyzed the spatial and temporal patterns of climate extremes in Northwest China based on temperature and precipitation data from 172 meteorological stations. The results showed a general warming trend in the region, with increasing occurrences of warm extremes and decreasing occurrences of cold extremes. Some regions also experienced increasing precipitation extremes. These findings suggest that Northwest China is experiencing more extreme climate events, which could impact hydrological processes, ecological processes, and human health.
Article
Physics, Multidisciplinary
Huanan Li, Shixiong Yin, Emanuele Galiffi, Andrea Alu
Summary: This study reveals the role of temporal interfaces in non-Hermitian physics, introducing the dual of PT symmetry for temporal boundaries. It unveils unexplored interference mechanisms enabling extreme energy manipulation, and provides new scenarios for time-switched metamaterials, connecting them with the opportunities offered by non-Hermitian phenomena.
PHYSICAL REVIEW LETTERS
(2021)
Article
Environmental Sciences
Yalin Tian, Zhongwei Yan, Zhen Li
Summary: As one of the largest arid and semi-arid regions in the world, central Asia is highly sensitive to changes in regional climate. This study examines the spatial-temporal variations of extreme precipitation in recent decades using gridded data and reanalysis data. The results indicate an overall increase in precipitation extremes in central Asia, with the largest changes occurring in spring.
Article
Green & Sustainable Science & Technology
Raymond Lam, Sergio Lopez Dubon, Brian Sellar, Christopher Vogel, Thomas Davey, Jeffrey Steynor
Summary: In order to maximize the potential of tidal stream energy, developers are encouraged to use larger blades on tidal turbines. However, there can be discrepancies between the loading scenarios encountered in testing facilities and those in reality, which can lead to errors in blade loads and fatigue damage. Through model-scale experiments, it was found that the variation in tidal blade load can significantly impact predicted fatigue damage. The findings suggest the need for adjustments in fatigue testing methods to improve accuracy.
Article
Multidisciplinary Sciences
Peijun Shi, Yanqiang Chen, Gangfeng Zhang, Haiping Tang, Zhi Chen, Deyong Yu, Jing Yang, Tao Ye, Jing'ai Wang, Shunlin Liang, Yonggui Ma, Jidong Wu, Peng Gong
Summary: Oxygen concentration varies significantly on the Qinghai-Tibetan Plateau, showing strong spatial and seasonal differences compared to earlier studies. Summer oxygen levels are slightly higher than winter levels. Altitude, air temperature, and vegetation index have different relative contributions to oxygen concentration.
SCIENTIFIC REPORTS
(2021)
Article
Microbiology
Maitreyi Nagarkar, Maggie Wang, Bellineth Valencia, Brian Palenik
Summary: The study found that there are numerous Synechococcus amplicon sequence variants (ASVs) within the population at the Scripps Institution of Oceanography pier and in the Southern California coastal ecosystem. An anomalous bloom in August 2016 significantly increased the overall abundance of Synechococcus and introduced normally oligotrophic Synechococcus clade II into the population. This study also observed changes in clade and ASV composition during blooms, as well as more oligotrophic ASVs and clades further offshore.
ENVIRONMENTAL MICROBIOLOGY
(2021)
Article
Environmental Sciences
Krastina Malcheva, Lilia Bocheva, Hristo Chervenkov
Summary: This research aims to analyze the spatio-temporal variations of extreme heat events in Southeastern Europe and evaluate their intensity and tendency using temperature data from meteorological stations. The study demonstrates the suitability of the applied combined approach in investigating the evolution of hot weather phenomena.
Article
Geosciences, Multidisciplinary
Omvir Singh, Divya Saini, Pankaj Bhardwaj
Summary: This study investigated meteorological drought in the dryland ecosystem of Rajasthan state in India. The findings show that nearly half of the study years experienced drought, with over 90% being mild drought, while severe and extreme droughts were less common. The study revealed significant differences in wetter and drier conditions across different regions, highlighting the importance of effective drought management strategies.
Article
Meteorology & Atmospheric Sciences
Divya Saini, Pankaj Bhardwaj, Omvir Singh
Summary: This study examines the recent rainfall variability in the dryland ecosystem of Rajasthan, northwestern India. The results show high interannual variability in rainfall occurrence, with most deficit years coinciding with El-Nino events. While the mean annual rainfall demonstrates a marginal upward trend, certain stations in the western region show significant increasing trends while others in the eastern region show non-significant declining trends. The spatial pattern reveals a decrease in rainfall from the east and southeast to the west and northwest, which is associated with the presence of the Aravalli Mountains. The frequency of heavy rainfall events has shown a positive trend in some stations and a negative trend in others.
THEORETICAL AND APPLIED CLIMATOLOGY
(2022)
Article
Water Resources
Omvir Singh, Amrita Kasana, Pankaj Bhardwaj
Summary: This paper examines the energy and groundwater irrigation nexus in a highly irrigated ecosystem of north western India. The study reveals that electric tube-wells consume a significant amount of electricity and account for a large proportion of total subsidies disbursed. The area irrigated by tube-wells has significantly increased. Rice and sugarcane crops are the main consumers of energy. The study also shows that the use factor of tube-wells is much higher during kharif season compared to rabi season. Farmers in this region have achieved high economic productivity in all crops except for rice.
APPLIED WATER SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Divya Saini, Omvir Singh, Tejpal Sharma, Pankaj Bhardwaj
Summary: This study conducted a comprehensive assessment and mapping of drought vulnerability in the Indian state of Rajasthan using geographic information systems and the analytic hierarchy process. The results showed severe to extreme vulnerability in 25% of the state, while the remaining areas demonstrated normal to moderate vulnerability.
Article
Geosciences, Multidisciplinary
Manoranjan Mishra, Tamoghna Acharyya, Celso Augusto Guimaraes Santos, Richarde Marques Da Silva, Pritam Chand, Debdeep Bhattacharyya, Sanjay Srivastava, Omvir Singh
Summary: This study analyzes the spatiotemporal variation of lightning flashes and associated deaths in Odisha State, India from 2001 to 2020. The study finds a significant increase in lightning strikes across the state, with Mayurbhanj, Sundargarh, and Keonjhar districts experiencing the highest incidence. The results show a moderate correlation between lightning strikes and deaths during the analyzed period.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2022)
Article
Environmental Sciences
Pankaj Chauhan, Jyoti Sharma, Pankaj Bhardwaj, Manish Mehta, Rouf Ahmad Shah, Omvir Singh, Kalachand Sain
Summary: In this study, suspended sediment load (SSL), sediment yield, and erosion rates were estimated in Pindari Glacier basin (PGB) and Kafni Glacier basin (KGB) using discharge and suspended sediment concentration (SSC) data. The results showed that PGB had approximately 1.7 times higher mean annual discharge compared to KGB. The average SSC and SSL in PGB were higher than in KGB, and both basins had similar sediment yield and erosion rates.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Environmental Sciences
Jyoti Sharma, Omvir Singh
Summary: This study investigates changes in agricultural land use and its impact on crop productivity, diversity, and food availability in Haryana, India, over a 52-year period. The analysis reveals that agricultural land use became intensive and shifted from coarse cereals to fine food grains, leading to an increase in the yield and production of wheat and rice. However, the production of maize, jowar, and pulses showed negative growth despite an increase in their yield. The findings suggest that further improvement in crop production can only be achieved through increased yield, as there is no room for horizontal expansion in cultivable area.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Environmental Sciences
Saumyajit Ghosh, Dipankar Das, Shasanka Kumar Gayen, Pankaj Bhardwaj
Summary: This study delineates groundwater potential zones in the Ganga alluvial plain of Alipurduar District in India using integrated remote sensing, geographic information systems (GIS), and analytic hierarchy process (AHP) methods. The groundwater potential index (GPI) was computed based on various factors, and the resulting maps were verified with observed well data. The study has important implications for sustainable groundwater planning and proper water usage in agriculture-dominated areas.
MODELING EARTH SYSTEMS AND ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Dinesh Kumar, Sachin Pandwar, Divya Saini, Pankaj Bhardwaj, Omvir Singh
Summary: This study estimates the probabilities and return periods of peak flood discharges in the Markanda basin of the Ghaggar river system in north western India. Two probability distribution models, Gumbel Extreme Value (GEV) and Log-Pearson Type III (LP-III), are used to estimate future flood discharges based on data from eight gauge and discharge sites. The results show that the GEV distribution model tends to overestimate compared to the LP-III distribution model. The findings of this study will be valuable for water resource engineers in designing hydraulic structures for flood management.
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
(2023)
Article
Geosciences, Multidisciplinary
Divya Saini, Jyoti Sharma, Omvir Singh
Summary: This study examines the variations and trends in dry/wet days and spells over the Banas River basin from 1961 to 2020. The results reveal a decreasing trend in dry days and an increasing trend in wet days, with 1993 identified as a significant change point.
JOURNAL OF EARTH SYSTEM SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Pankaj Bhardwaj, Omvir Singh
Summary: This study investigates tropical cyclones activity over the Bay of Bengal during the post-monsoon season from 1972 to 2015, identifying active and inactive TC years based on frequency. It found that active TC years are associated with El Nino-Southern Oscillation and Indian Ocean Dipole events, with more favorable conditions for cyclone genesis.
JOURNAL OF EARTH SYSTEM SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Himadri Sen Gupta, Tarun Adluri, Dylan Sanderson, Andres D. Gonzalez, Charles D. Nicholson, Daniel Cox
Summary: This study proposes a multi-objective optimization model to determine optimal retrofitting strategies to enhance community resilience under multiple hazards. The model is applied to analyze the impact of earthquake and tsunami hazards on the community of Seaside, Oregon. The results show that retrofitting buildings to achieve higher seismic codes can significantly reduce the impact of natural hazards on structural damage, population dislocation, and building repair times. It highlights the importance of considering geographical location and mitigation measures when optimizing retrofitting strategies.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2024)
Article
Geosciences, Multidisciplinary
Huiying Sun, Zhenhua Di, Peihua Qin, Shenglei Zhang, Yang Lang
Summary: This study explored the spatio-temporal variations of drought-flood-disaster (DFD) risks in China using natural and socio-economic datasets. The main findings include the decrease in vulnerability, the increasing flood hazard danger degree, and the close relationship between disaster risk and vulnerability. The results have important implications for disaster management decision-making.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2024)
Article
Geosciences, Multidisciplinary
Nicholas Kimutis, Tamara Wall, Lyndsey Darrow
Summary: Overall, emergency management plans for extreme heat events in the U.S. show some level of consistency, but there are significant variations in response thresholds and metrics across different locations. Some cities have started adapting response thresholds based on local epidemiological studies, but there are still areas that have not lowered thresholds during cascading hazard events.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2024)
Article
Geosciences, Multidisciplinary
Chengfang Huang, Ning Li, Zhengtao Zhang, Yuan Liu
Summary: The economic impact of disasters is closely related to regional economic development. China's economic development is conducive to reducing the economic impact of disasters, but regional differences need to be clarified in policy formulation, with reducing indirect impact as a higher priority in more developed areas.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2024)
Article
Geosciences, Multidisciplinary
Chiara Bruni, Bruno Aparicio, Beatriz Lourenco, Martinho Marta-Almeida, Akli Benali, Susana Barreiro, Alfredo Rocha, Ana C. L. Sa
Summary: This study analyzes the wildfire hazard in a 115,000 ha landscape in Portugal and explores the threat posed to assets of pulp paper companies. It finds that eucalypt plantations not managed by the companies, particularly those with ages between 6 and 9 years, present a major risk. Over half of the landscape has the potential for large wildfires.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2024)
