143 research outputs found

    HiTIC-Monthly: a monthly high spatial resolution (1 km) human thermal index collection over China during 2003–2020

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    Human-perceived thermal comfort (known as human-perceived temperature) measures the combined effects of multiple meteorological factors (e.g., temperature, humidity, and wind speed) and can be aggravated under the influences of global warming and local human activities. With the most rapid urbanization and the largest population, China is being severely threatened by aggravating human thermal stress. However, the variations of thermal stress in China at a fine scale have not been fully understood. This gap is mainly due to the lack of a high-resolution gridded dataset of human thermal indices. Here, we generated the first high spatial resolution (1 km) dataset of monthly human thermal index collection (HiTIC-Monthly) over China during 2003–2020. In this collection, 12 commonly used thermal indices were generated by the Light Gradient Boosting Machine (LightGBM) learning algorithm from multi-source data, including land surface temperature, topography, land cover, population density, and impervious surface fraction. Their accuracies were comprehensively assessed based on the observations at 2419 weather stations across the mainland of China. The results show that our dataset has desirable accuracies, with the mean R2, root mean square error, and mean absolute error of 0.996, 0.693 ∘C, and 0.512 ∘C, respectively, by averaging the 12 indices. Moreover, the data exhibit high agreements with the observations across spatial and temporal dimensions, demonstrating the broad applicability of our dataset. A comparison with two existing datasets also suggests that our high-resolution dataset can describe a more explicit spatial distribution of the thermal information, showing great potentials in fine-scale (e.g., intra-urban) studies. Further investigation reveals that nearly all thermal indices exhibit increasing trends in most parts of China during 2003–2020. The increase is especially significant in North China, Southwest China, the Tibetan Plateau, and parts of Northwest China, during spring and summer. The HiTIC-Monthly dataset is publicly available from Zenodo at https://doi.org/10.5281/zenodo.6895533 (Zhang et al., 2022a).</p

    Climate Change and Environmental Sustainability- Volume 5

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    This volume of Climate Change and Environmental Sustainability covers topics on greenhouse gas emissions, climatic impacts, climate models and prediction, and analytical methods. Issues related to two major greenhouse gas emissions, namely of carbon dioxide and methane, particularly in wetlands and agriculture sector, and radiative energy flux variations along with cloudiness are explored in this volume. Further, climate change impacts such as rainfall, heavy lake-effect snowfall, extreme temperature, impacts on grassland phenology, impacts on wind and wave energy, and heat island effects are explored. A major focus of this volume is on climate models that are of significance to projection and to visualise future climate pathways and possible impacts and vulnerabilities. Such models are widely used by scientists and for the generation of mitigation and adaptation scenarios. However, dealing with uncertainties has always been a critical issue in climate modelling. Therefore, methods are explored for improving climate projection accuracy through addressing the stochastic properties of the distributions of climate variables, addressing variational problems with unknown weights, and improving grid resolution in climatic models. Results reported in this book are conducive to a better understanding of global warming mechanisms, climate-induced impacts, and forecasting models. We expect the book to benefit decision makers, practitioners, and researchers in different fields and contribute to climate change adaptation and mitigation

    Does Economic Agglomeration Lead to Efficient Rural to Urban Land Conversion? An Examination of China’s Metropolitan Area Development Strategy

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    Urbanization involves expansion of the amount of land covered by urban uses. Rural to urban land conversion (RULC) can satisfy demand for the additional space that growing cities require. However, there can be negative consequences, such as the loss of productive agricultural land and/or the destruction of natural habitats. Considerable interest therefore exists among policy makers and researchers regarding how the efficiency of RULC can be maximized. We used the Gini index and a data envelopment analysis to quantify the relationship between RULC and economic development for 17 metropolitan areas in China. We did this from two perspectives: (i) coordination; and (ii) efficiency. We found that economic agglomeration fosters the coordination of the amount of rural land that is allocated to be converted to urban uses. Similarly, economic agglomeration increases the efficiency of RULC in terms of the processes of socio-economic production. Through production technology innovation and readjustment in the scale of input factors, the productive efficiency of RULC can be promoted. Our findings suggest a need to strictly limit the amount of RULC, design differential land management policies according to location and development level, and adjust RULC allocation between different cities. Further, in harnessing the potential of intensive urban land use and restructuring, production factors, including land, can be enhanced through technological innovation. Research presented in this paper provides insights for areas of the world which are yet to undergo the rapid urbanization that China has experienced, but where it is projected to occur over the coming decades

    Land Use Change from Non-urban to Urban Areas

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    This reprint is related to land-use change and non-urban and urban relationships at all spatiotemporal scales and also focuses on land-use planning and regulatory strategies for a sustainable future. Spatiotemporal dynamics, socioeconomic implication, water supply problems and deforestation land degradation (e.g., increase of imperviousness surfaces) produced by urban expansion and their resource requirements are of particular interest. The Guest Editors expect that this reprint will contribute to sustainable development in non-urban and urban areas

    Estimation of Power Production of Wind Potential

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    Estimating the wind potential for a particular micro location (siting) involves detailed analysis of the possibility of annual electricity production at that location. Based on the assumption of installed capacity, area and number of hours constant load, it is possible to obtain annual theoretical production of electricity according to expression . The wind atlas for target location contains data onto 5 reference roughness lengths (0.000 m , 0.030 m , 0.100 m , 0.400 m , 1.500 m ) and 5 reference heights (10 m , 25 m , 50 m , 100 m , 200 m ) above ground level . This paer have measured data onto site at target location, and base of that there was modeled digital model of location and wind power model for elevation at 110m. There was estimation of 20 GE (2,78 MW) instaling capacity for target location.14th Conference on Sustainable Development of Energy, Water and Environment Systems : October 1-6, Dubrovnik, Croatia, 2019

    Special External Effects on Fluvial System Evolution

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    Rivers are an excellent witness of the dynamics affecting Earth’s surface due to their sedimentary products and morphological expression, which may be considered as fluvial archives. Until now, the focus has been on evaluating the general impact of individual external factors. However, the importance of the specific environmental characteristics of these factors has become increasingly recognized, as highlighted in recent case studies. For example, the effects of regional climate, differentiated topography and vegetation, and frozen ground appear to play an essential role in the evolution of the fluvial system. Integration of such environmental conditions in the processes that were active within the complex fluvial system will open new perspectives in our progressive understanding of the evolution of landscape form, ecology, sediment fluxes, and hydrology of the system within the framework of the external drivers such as tectonics, general climate, and human activity. This is an appealing challenge that we wish to address in the present Special Issue under the aegis of the Fluvial Archives Group (FLAG)

    The sounds on the Silk Road from Xi'an to Urumqi. Soundscape, recording and exposition of the sound

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    [eng] The main objective of the doctoral thesis is to study the Soundscape in the Chinese route of the Silk Road based on the premises issued in 2003 by the Convention for the Safeguarding of the Intangible Cultural Heritage of UNESCO. In China, no application of this agreement has been used. The research proposed by the doctoral thesis is an important precedent in applying the guidelines concerning the study and preservation of intangible cultural heritage. The Silk Road represents the exchange and integration of Chinese and Western cultures, and its mysterious and remote atmosphere is fascinating. I have longed for the Silk Road since I was young. I was exposed to sound media art, soundscape maps, and sound sculpture research in the laboratory of Dr. Josep Cerda at the University of Barcelona. Finally, it presented the idea of applying sound media art to data analysis of the sound on the Silk Road and archival records. The General Conference of the United Nations Educational, Scientific and Cultural Organization. UNESCO, at its 32nd meeting, held in Paris from September 29 to October 17, 2003. Approved the Convention for the Safeguarding of the Cultural Heritage Intangible, the intergovernmental agreement that Recognizes that communities, groups, and individuals play an important role in the production, safeguarding, maintenance, and recreation of intangible cultural heritage, thereby contributing to enriching cultural diversity and human creativity. It considers the importance of the Soundscape as an exponent of cultural diversity. The General objective of this doctoral dissertation is to apply the intangible cultural heritage protection formulated by UNESCO to "Using sound media art to record and protect the sound landscape of typical areas on the Silk Road." Through a literature review of Western sound research and the current sound landscape research status in China, China is currently conducting sound landscape research and research on a certain designated area. Quantitative analysis exists, but there is no study on "The sounds on the Silk Road from Xi'an to Urumqi." The Silk Road is a vast area and has many research limitations in terms of geography. This research uses ethnographic research as the main research methodology, and finally determines the research site in China from Xi'an to Urumqi in Six specific regions. In Chinese history, the Silk Road started from Xi'an, Shaanxi Province, and ended in Xinjiang Province, the last region connecting China with Eurasia. I passed through the Longmen Grottoes in Luoyang, Henan Province, the surround-ing areas of Mogao Grottoes in Gansu Province, and the surrounding regions of Qin- ghai Lake in Xining City Qinghai Province. As the gathering area of ethnic minorities in the southwest of China's Silk Road, Yunnan Province also includes this doctoral thesis research. Try to find the voices on the Silk Road that are most worthy of investigation and preservation, and conduct field investigations and quantitative analysis. The purpose of the research is to use a sound media library, soundscape map, and sound art museum display to reflect the ecological landscape environment of the Silk Road, the urban human environment, and the status quo of historical relics. Based on this, establish a sound landscape database. To form a digital map of the Soundscape, making it an important carrier for the protection and inheritance of the sound landscape on the Silk Road, as a basis for academic and theoretical research on protecting intangible cultural heritage on the Silk Road. The second objective of the research is to establish a sound media art laboratory and a sound documentation center in Shanghai Donghua University and Shanghai Arts & Design Academy, to supplement the current lack of sound media art as a research direction in design education in China. The third research goal is to apply future sound media art combined with big data artificial intelligence to serve society. Apply intelligent sound design as an essential means of exhibition and display and demonstrate in Chinese museums. In terms of research conclusions and social influence, this doctoral thesis puts forward for the first time "the application of sound media art to protect and inherit the soundscape of the Silk Road". First of all, a set of core methodology and research techniques in the research of this doctoral dissertation applied to the academic study of soundscape protection on the Silk Road. Due to the limitations of the research funding and time of the doctoral thesis, only investigate six important areas. I will not terminate this research because of the end of this paper. Researchers will continue to study some other sub-important regions of the Silk Road in China. This doctoral thesis will lay a theoretical foundation for China and the world to study the "Silk Road" soundscape research. Introduce the establishment method of sound media library into the design art education of Chinese colleges and universities. To make up for the lack of research in Chinese universities that specifically focus on sound art design instead of music theory research under art design research. The third is to create a sound media library and make an interactive multimedia map to be applied to the soundscape guide of the future cultural journey. Use digital media technology and sound media art principles to design a virtual interactive sound museum. Establish a complete set of sound expressions, protect and Inheriting the Soundscape of the Silk Road while driving the richness of cultural tourism in the southwest and northwest regions of China. The audience can understand the history and culture of the Silk Road through acoustic sensory experience in multiple dimensions.[spa] La finalidad de esta investigación es establecer un archivo sonoro de la Ruta de la Seda, en su recorrido en China, aplicando las directrices de la UNESCO, establecidas en la Convención para la Salvaguarda del Patrimonio Cultural Inmaterial, a partir de una metodología teorico-práctica de recogida de datos mediante grabaciones de campo y geolocalizadas mediante mapas sonoros. A lo largo de los 5 años de investigación, se ha podido constatar la transformación cultural de la zona de estudio debido a la irrupción de las nuevas tecnologías y la creciente industrialización, aspectos que constatan la necesidad de este tipo de investigaciones que hemos llevado a cabo, ya que los sonidos tradicionales del paisaje sonoro de la Ruta de la Seda están en vías de desaparición, por lo tanto es muy importante preservarlos para el futuro mediante la creación de un archivo sonoro.. En la investigación se han introducido elementos tecnológicos importantes, sobre todo en lo que hace referencia en la exposición de los sonidos del paisaje sonoro y en el diseño de un espacio expositivo interactivo especialmente diseñado para presentar estos sonidos y demás aspectos de la tradición cultural y artesana de la Ruta de la seda. Se ha partido de los estudios realizados por el investigador canadiense R. Murray-Schafer que se desarrollaron en la década de los años 70 del siglo pasado en la Universidad Simon Fraser de Canadá, y que han ido evolucionando hasta la actualidad por las aportaciones sucesivas de I. Westercamp y B. Truaux, que dieron como resultado el Word Sounscape Project, que es el origen del trabajo de investigación que hemos llevado a cabo. Toda la investigación se ha llevado a cabo en el mismo lugar de estudio de la Ruta de la Seda, en su tramo Chino. La gran mayoría de las grabaciones de campo y las imágenes fotográficas, así como las entrevistas y diseño expositivo han sido llevadas a cabo por la autora. Así mismo cabe remarcar que el estudio de las fuentes bibliográficas se han realizado en la mayoría de las veces a partir de libros y artículos redactados en el idioma mandarín, por lo que la accesibilidad a las fuentes primarias, hacen de esta tesis un trabajo de investigación muy importante
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