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  • 1
    Unknown
    Washington, D.C. : The World Bank
    Keywords: emission scenarios ; colors ; vegetative cover ; oceans ; energy efficiency ; greenhouse gas ; temperature anomalies ; temperature ; emission ; greenhouse gas emissions ; carbon ; low-carbon ; climate change ; carbon cycle ; ecosystem ; ipcc ; greenhouse ; climate ; carbon dioxide ; chlorophyll concentration
    Description / Table of Contents: Today's enormous development challenges are complicated by the reality of climate change�the two are inextricably linked and together demand immediate attention. Climate change threatens all countries, but particularly developing ones. Understanding what climate change means for development policy is the central aim of the World Development Report 2010. It explores how public policy can change to better help people cope with new or worsened risks, how land and water management must adapt to better protect a threatened natural environment while feeding an expanding and more prosperous population, and how energy systems will need to be transformed.The report is an urgent call for action, both for developing countries who are striving to ensure policies are adapted to the realities and dangers of a hotter planet, and for high-income countries who need to undertake ambitious mitigation while supporting developing countries efforts. A climate-smart world is within reach if we act now to tackle the substantial inertia in the climate, in infrastructure, and in behaviors and institutions; if we act together to reconcile needed growth with prudent and affordable development choices; and if we act differently by investing in the needed energy revolution and taking the steps required to adapt to a rapidly changing planet.In the crowded field of climate change reports, WDR 2010 uniquely: -- emphasizes development -- takes an integrated look at adaptation and mitigation -- highlights opportunities in the changing competitive landscape and how to seize them -- proposes policy solutions grounded in analytic work and in the context of the political economy of reform
    Pages: Online-Ressource (XXI, 417 Seiten)
    ISBN: 9780821379882
    Language: English
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  • 2
    Keywords: greenhouse gas emission reduction ; energy consumption ; bus ; greenhouse gas emission ; rapid transit ; pedestrian ; pedestrian pathway ; climate change ; transportation network ; road pricing ; emission ; urban transportation ; travel demand ; rebates ; greenhouse gas ; road ; transport ; transport sector ; transit ; travel demand management
    Description / Table of Contents: The Eco2 Cities approach is a point of departure for cities that would like to reap the many benefits of ecological and economic sustainability. It provides an analytical and operational framework that offers strategic guidance to cities on sustainable and integrated urban development. At the same time case studies are used throughout the book to provide a matter-of-fact and ground-level perspective. The Eco2 framework is flexible and easily customized to the context of each country or city. Based on the particular circumstances and the development priorities of a city - the application of the framework can contribute to the development of a unique action plan or roadmap in each case. This action plan can be triggered through catalyst projects.To support this framework, the book also begins to introduce some powerful and practical methods and tools that can further enable sustainable and integrated city planning and decision making. These include 1) operational and process methods that can strengthen collaborative decision making and cross-sector synergies in a city; 2) analytical methods ranging from diagnostics, simulation, design and scenario-generation; and 3) accounting and benchmarking methods which can help clarify, define and measure what it means to truly invest in sustainability and resilience.As additional reference reading, the book also features a series of case studies from best practice cities around the world, each demonstrating a very different dimension of the Eco2 approach. It also features a series of infrastructure sector notes (on spatial development, transport, energy, water and waste management), each of which explore sector specific issues as they pertain to urban development, and the many opportunities for coordination and integration across sectors.
    Pages: Online-Ressource (XXVIII, 358 Seiten)
    ISBN: 9780821381441
    Language: English
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  • 3
    Unknown
    Rijeka : InTech
    Keywords: climate change
    Description / Table of Contents: This book shows some of the socio-economic impacts of climate change according to different estimates of the current or estimated global warming. A series of scientific and experimental research projects explore the impacts of climate change and browse the techniques to evaluate the related impacts. These 23 chapters provide a good overview of the different changes impacts that already have been detected in several regions of the world. They are part of an introduction to the researches being done around the globe in connection with this topic. However, climate change is not just an academic issue important only to scientists and environmentalists; it also has direct implications on various ecosystems and technologies.
    Pages: Online-Ressource (454 Seiten)
    ISBN: 9789533074115
    Language: English
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  • 4
    Unknown
    Rijeka : InTech
    Keywords: climate change ; global warming
    Description / Table of Contents: This book is intended to introduce the reader to examples of the range of practical problems posed by "Global Warming". It includes 11 chapters split into 5 sections. Section 1 outlines the recent changes in the Indian Monsoon, the importance of greenhouse gases to life, and the relative importance of changes in solar radiation in causing the changes. Section 2 discusses the changes to natural hazards such as floods, retreating glaciers and potential sea level changes. Section 3 examines planning cities and transportation systems in the light of the changes, while section 4 looks at alternative energy sources. Section 5 estimates the changes to the carbon pool in the alpine meadows of the Qinghai-Tibet Plateau. The 11 authors come from 9 different countries, so the examples are taken from a truly international set of problems.
    Pages: Online-Ressource (250 Seiten)
    ISBN: 9789533071497
    Language: English
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  • 5
    Keywords: climate change
    Description / Table of Contents: This book offers an interdisciplinary view of the biophysical issues related to climate change. Climate change is a phenomenon by which the long-term averages of weather events (i.e. temperature, precipitation, wind speed, etc.) that define the climate of a region are not constant but change over time. There have been a series of past periods of climatic change, registered in historical or paleoecological records. In the first section of this book, a series of state-of-the-art research projects explore the biophysical causes for climate change and the techniques currently being used and developed for its detection in several regions of the world. The second section of the book explores the effects that have been reported already on the flora and fauna in different ecosystems around the globe. Among them, the ecosystems and landscapes in arctic and alpine regions are expected to be among the most affected by the change in climate, as they will suffer the more intense changes. The final section of this book explores in detail those issues.
    Pages: Online-Ressource (520 Seiten)
    ISBN: 9789533074191
    Language: English
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  • 6
    Keywords: climate change ; adaptation technologies
    Description / Table of Contents: Sea level rise, more intense storm surges, and other climate change impacts will pose serious threats to large number of people living along the worlds coasts. This guidebook covers thirteen main adaptation technologies for coastal erosion and flooding due to climate change. For each technology, the authors present a technology description, its advantages and disadvantages, costs and benefits, institutional organisation requirements and detailed examples about its application. This guidebook is co-authored by Matthew M. Linham and Robert J. Nicholls from the University of Southampton. Professor Nicholls is one of the top international experts on coastal impacts and adaptation to climate change, with an emphasis on seal level rise. This guidebook will be a useful handbook for policy makers and coastal zone project planners. This publication is one of the adaptation and mitigation technology guidebooks produced as part of the GEF-funded Technology Needs Assessment (TNA) project. This project is undertaken by UNEP and URC in 36 developing countries.
    Pages: Online-Ressource (XII, 150 Seiten)
    ISBN: 9788755038554
    Language: English
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  • 7
    Keywords: cities ; climate change ; distaster risk management ; environmental buffers ; flooding ; urban development
    Description / Table of Contents: Urban flooding is a significant challenge which today increasingly confronts the residents of the expanding cities and towns of developing countries, as well as policymakers and national, regional and local government officials. The Global Handbook presents the state-of-the art in urban flood risk management in a thorough and user-friendly way. It serves as a primer in integrated urban flood risk management for technical specialists, decision-makers and other concerned stakeholders in the private and community sectors. It covers the causes, probability and impacts of floods; the measures that can be used to manage flood risk, balancing structural and non-structural solutions in an integrated fashion; and the means by which these measures can be financed and implemented, and their progress monitored and evaluated.The Handbook provides an operational guide on how most effectively to manage the risk of floods in rapidly urbanizing settings – and within the context of a changing climate.
    Pages: Online-Ressource (631 Seiten)
    ISBN: 9780821394779
    Language: English
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  • 8
    Keywords: climate change
    Description / Table of Contents: This book provides an interdisciplinary view of how to prepare the ecological and socio-economic systems to the reality of climate change. Scientifically sound tools are needed to predict its effects on regional, rather than global, scales, as it is the level at which socio-economic plans are designed and natural ecosystem reacts. The first section of this book describes a series of methods and models to downscale the global predictions of climate change, estimate its effects on biophysical systems and monitor the changes as they occur. To reduce the magnitude of these changes, new ways of economic activity must be implemented. The second section of this book explores different options to reduce greenhouse emissions from activities such as forestry, industry and urban development. However, it is becoming increasingly clear that climate change can be minimized, but not avoided, and therefore the socio-economic systems around the world will have to adapt to the new conditions to reduce the adverse impacts to the minimum. The last section of this book explores some options for adaptation.
    Pages: Online-Ressource (488 Seiten)
    ISBN: 9789533076218
    Language: English
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  • 9
    Keywords: climate change
    Description / Table of Contents: The Earth is the only planet in our solar system that supports life. The complex process of evolution occurred on Earth only because of some unique environmental conditions that were present: water, an oxygen-rich atmosphere, and a suitable surface temperature. Climate change refers to a statistically significant variation in either the mean state of the climate or in its variability, persisting for an extended period (typically decades or longer). Thus, it requires field of attention towards reduction in the rise in atmospheric temperature, by controlling emitted greenhouse gases into the atmosphere in order to preserve natural resources and by introducing new technologies on alternative fuels. This book presents the fundamental effect on the origin of climate change, impacts over ice cap, melting of Arctic ice, rise in sea level and related technologies that can be implemented to cultivate our land for agriculture, growing forestation to reduce the impact of temperature rise and disaster on human being as well as on other livelihood. This also need to strive for novel policies that world leader should adopt.
    Pages: Online-Ressource (508 Seiten)
    ISBN: 9789535109341
    Language: English
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  • 10
    Unknown
    Rijeka : InTech
    Keywords: climate change ; atmospheric sciences
    Description / Table of Contents: As societies transition to evidence-based adaptation and management there is increasing recognition of the need for understanding climate change and variability dynamics and impacts at regional levels and for various activities. This book is a contribution toward that goal. Readers interested in climate change management will find detailed discussions of climatic variability dynamics in selected regions as well as new innovative ways of monitoring climate change, assessing climate risks, and predicting impacts. Those interested in refreshing the fundamentals of climate change and climate variability will find a very accessible review of the status of knowledge on the subject, including a balanced interrogation of available evidence. In an attempt to keep the book accessible, every effort was made to minimize technical jargon without compromising scientific accuracy. The result should be useful to researchers, practitioners, and policy makers.
    Pages: Online-Ressource (203 Seiten)
    ISBN: 9789535111870
    Language: English
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  • 11
    Unknown
    Rijeka : InTech
    Keywords: greenhouse gases ; global warming ; climate change
    Description / Table of Contents: Understanding greenhouse gas capture, utilization, reduction, and storage is essential for solving issues such as global warming and climate change that result from greenhouse gas. Taking advantage of the authors' experience in greenhouse gases, this book discusses an overview of recently developed techniques, methods, and strategies: - Novel techniques and methods on greenhouse gas capture by physical adsorption and separation, chemical structural reconstruction, and biological utilization. - Systemic discussions on greenhouse gas reduction by policy conduction, mitigation strategies, and alternative energy sources. - A comprehensive review of geological storage monitoring technologies.
    Pages: Online-Ressource (348 Seiten)
    ISBN: 9789535101925
    Language: English
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  • 12
    Keywords: climate change mitigation ; emission reductions ; electricity ; energy efficiency ; energy policy ; emission ; climate change ; drought ; climate ; forests ; carbon dioxide ; low-carbon ; global greenhouse gas emissions ; emissions ; colors ; deforestation ; transport sector ; global greenhouse gas ; carbon dioxide mitigation
    Description / Table of Contents: Governments and civil society in Latin America and the Caribbean should be well informed about the potential costs and benefits of combating climate change, their policy options over the next decades, and the global context for these policy decisions. At the same time, the global community needs to be better informed about the unique perspective of the Latin American and Caribbean region: problems the region will face, its potential contributions toward combating global warming, and how to maximize this potential while continuing to maintain growth and reduce poverty. This book, a companion volume to Low Carbon, High Growth: Latin American Responses to Climate Change, seeks to help fill both these needs.
    Pages: Online-Ressource (XIV, 200 Seiten)
    ISBN: 9780821380819
    Language: English
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  • 13
    Keywords: climate change ; gravity change ; isostasy ; tectonics ; volcanism ; deformation ; geodynamic process
    Description / Table of Contents: During the last decades, the monitoring and modelling of various geodynamic processes have gained ever increasing importance. In particular, temporal variations of the deformation and gravity fields recorded by new types of geodetic measuring techniques and reflecting isostatic, tectonic or volcanic processes in the earth's interior as well as climatologically induced changes on its surface have opened new avenues. The present volume succeeds a similar topical volume published in 2007 and reflects the most recent developments in these fields of research. Part of the papers in this book were presented at the second workshop on 'Deformation and Gravity Change: Indicators of Isostasy, Tectonics, Volcanism and Climate Change' that took place at the Casa de los Volcanes on Lanzarote, Spain, during March 27-30, 2007. It was jointly organized and supported by the International Association of Geodesy (IAG), the Spanish Ministry of Education and Science, the Spanish Council for Scientific Research and the Cabildo Insular de Lanzarote. The workshop also served as the second meeting of the members of the IAG Working Group ICCT2 on 'Dynamic Theories of Deformation and Gravity Fields'.
    Pages: Online-Ressource (373 Seiten)
    ISBN: 9783034601474
    Language: English
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  • 14
    Unknown
    Washington, D. C. : The World Bank
    Keywords: land use ; congestion ; climate change ; travel costs ; energy consumption ; fossil fuel ; population density ; trip ; congestion charging ; bus ; rapid transit ; infrastructure projects ; transport ; greenhouse gas ; car ; air ; emissions ; carbon neutral ; toll ; greenhouse gas emissions
    Description / Table of Contents: Energy is intrinsic to urban settlements, embedded in the built environment, and directly used to power socio-economic activity, transport and communications, and enable the provision of municipal services. In response to the crucial role of urban energy efficiency for environmentally sustainable and inclusive development processes, ESMAP’s Energy Efficient Cities Initiative (EECI) was launched in October 2008 to facilitate the implementation of practical energy solutions that meet the development priorities of cities, and simultaneously build their climate resilience. Chapter 1 begins with a contextual background on the inter-related associations between energy, socio-economic progress and urbanization. This edited volume compiles seven topical papers presented at the two EECI sponsored sessions during the World Bank’s fifth Urban Research Symposium, held at Marseille, France, June 28-30, 2009. Chapters 2–8 comprise the papers presented at these sessions: i) tools and assessment approaches on energy efficient urban development, and ii) good practices that promote low carbon sectoral interventions. The analytical tools and policy insights offered in this volume extend from integrated assessments of new cities to the impacts of socio-economic, climate and demographic changes on existing cities. Sector-specific interventions are discussed in the context of tools to ‘green’ buildings in Australia, the transformation to efficient lighting systems in the Philippines, and Demand Responsive Transport Systems in France. In addition, the documentation and benchmarking of a variety of low-carbon and carbon neutral good practices provides a range of practical insights on plausible energy efficient interventions in urban sectors. Thus the chapters in this publication comprise significant contributions to the ESMAP objective of mainstreaming and leveraging knowledge and initiatives on urban energy efficiency. Following from them, the last chapter 9 provides a contextual overview of ESMAP’s programmatic priorities to support energy efficient urban growth, to be effected through EECI.
    Pages: Online-Ressource (XVIII, 227 Seiten)
    ISBN: 9780821383094
    Language: English
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  • 15
    Keywords: climate change ; global warming ; environmental law ; human rights
    Description / Table of Contents: This Study explores arguments about the impact of climate change on human rights, examining the international legal frameworks governing human rights and climate change and identifying the relevant synergies and tensions between them. It considers arguments about (i) the human rights impacts of climate change at a macro level and how these impacts are spread disparately across countries; (ii) how climate change impacts human rights enjoyment within states and the equity and discrimination dimensions of those disparate impacts; and (iii) the role of international legal frameworks and mechanisms, including human rights instruments, particularly in the context of supporting developing countries’ adaptation efforts. The Study surveys the interface of human rights and climate change from the perspective of public international law. It builds upon the work that has been carried out on this interface by reviewing the legal issues it raises and complementing existing analyses by providing a comprehensive legal overview of the area and a focus on obligations upon States and other actors connected with climate change. The objective has therefore been to contribute to the global debate on climate change and human rights by offering a review of the legal dimensions of this interface as well as a survey of the sources of public international law potentially relevant to climate change and human rights in order to facilitate an understanding of what is meant, in legal terms, by 'human rights impacts of climate change' and help identify ways in which international law can respond to this interaction. This is a complex and dynamically evolving legal and policy landscape and this study aims to capture its most salient features insofar as they appear at present.
    Pages: Online-Ressource (XII, 145 Seiten)
    ISBN: 9780821387238
    Language: English
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  • 16
    Keywords: environmental engineering ; climate change ; global warming
    Description / Table of Contents: The failure of the UN climate change summit in Copenhagen in December 2009 to effectively reach a global agreement on emission reduction targets, led many within the developing world to view this as a reversal of the Kyoto Protocol and an attempt by the developed nations to shirk out of their responsibility for climate change. The issue of global warming has been at the top of the political agenda for a number of years and has become even more pressing with the rapid industrialization taking place in China and India. This book looks at the effects of climate change throughout different regions of the world and discusses to what extent cleantech and environmental initiatives such as the destruction of fluorinated greenhouse gases, biofuels, and the role of plant breeding and biotechnology. The book concludes with an insight into the socio-religious impact that global warming has, citing Christianity and Islam.
    Pages: Online-Ressource (646 Seiten)
    ISBN: 9789533077338
    Language: English
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  • 17
    Keywords: climate change ; oceanography ; atmospheric sciences
    Description / Table of Contents: This book provides a general introduction to the popular topic of climate variability. It explores various aspects of climate variability and change from different perspectives, ranging from the basic nature of low-frequency atmospheric variability to the adaptation to climate variability and change. This easy and accessible book can be used by professionals and non professionals alike.
    Pages: Online-Ressource (192 Seiten)
    ISBN: 9789533076997
    Language: English
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  • 18
    Unknown
    New York, Dordrecht, Heidelberg, London : Springer
    Keywords: climate change ; mitigation ; fossil energy ; alternative energy ; renewable energy ; solar energy ; biofuel ; atmospheric carbon ; energy conservation ; advanced combustion ; emission ; fuel cells ; precipitation ; sustainability
    Description / Table of Contents: There is a mounting consensus that human behavior is changing the global climate and its consequence could be catastrophic. Reducing the 24 billion metric tons of carbon dioxide emissions from stationary and mobile sources is a gigantic task involving both technological challenges and monumental financial and societal costs. The pursuit of sustainable energy resources, environment, and economy has become a complex issue of global scale that affects the daily life of every citizen of the world. The present mitigation activities range from energy conservation, carbon-neutral energy conversions, carbon advanced combustion process that produce no greenhouse gases and that enable carbon capture and sequestion, to other advanced technologies. From its causes and impacts to its solutions, the issues surrounding climate change involve multidisciplinary science and technology. This handbook will provide a single source of this information. The book will be divided into the following sections: Scientific Evidence of Climate Change and Societal Issues, Impacts of Climate Change, Energy Conservation, Alternative Energies, Advanced Combustion, Advanced Technologies, and Education and Outreach.
    Pages: Online-Ressource (XXVII, 2130 Seiten)
    ISBN: 9781441979919
    Language: English
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  • 19
    Unknown
    Rijeka : InTech
    Keywords: climate change ; oceanography ; atmospheric sciences
    Description / Table of Contents: Climate Models offers a sampling of cutting edge research contributed by an international roster of scientists. The studies strive to improve our understanding of the physical environment for life on this planet. Each of the 14 essays presents a description of recent advances in methodologies for computer-based simulation of environmental variability. Subjects range from planetary-scale phenomena to regional ecology, from impacts of air pollution to the factors influencing floods and heat waves. The discerning reader will be rewarded with new insights concerning modern techniques for the investigation of the natural world.
    Pages: Online-Ressource (336 Seiten)
    ISBN: 9789535101352
    Language: English
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  • 20
    Unknown
    Rijeka : InTech
    Keywords: climate change ; climatology ; oceanography ; atmospheric sciences
    Description / Table of Contents: Climatology, the study of climate, is no longer regarded as a single discipline that treats climate as something that fluctuates only within the unchanging boundaries described by historical statistics. The field has recognized that climate is something that changes continually under the influence of physical and biological forces and so, cannot be understood in isolation but rather, is one that includes diverse scientific disciplines that play their role in understanding a highly complex coupled "whole system" that is the earth's climate. The modern era of climatology is echoed in this book. On the one hand it offers a broad synoptic perspective but also considers the regional standpoint, as it is this that affects what people need from climatology. Aspects on the topic of climate change - what is often considered a contradiction in terms - is also addressed. It is all too evident these days that what recent work in climatology has revealed carries profound implications for economic and social policy; it is with these in mind that the final chapters consider acumens as to the application of what has been learned to date.
    Pages: Online-Ressource (398 Seiten)
    ISBN: 9789535100959
    Language: English
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  • 21
    Unknown
    Rijeka : InTech
    Keywords: phenology ; climate change ; agricultural and biological sciences
    Description / Table of Contents: Phenology, a study of animal and plant life cycle, is one of the most obvious and direct phenomena on our planet. The timing of phenological events provides vital information for climate change investigation, natural resource management, carbon sequence analysis, and crop and forest growth monitoring. This book summarizes recent progresses in the understanding of seasonal variation in animals and plants and its correlations to climate variables. With the contributions of phenological scientists worldwide, this book is subdivided into sixteen chapters and sorted in four parts: animal life cycle, plant seasonality, phenology in fruit plants, and remote sensing phenology. The chapters of this book offer a broad overview of phenology observations and climate impacts. Hopefully this book will stimulate further developments in relation to phenology monitoring, modeling and predicting.
    Pages: Online-Ressource (320 Seiten)
    ISBN: 9789535103363
    Language: English
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  • 22
    Keywords: climate change
    Description / Table of Contents: Climate scenarios suggest that current forest stands will face radically different temperature and precipitation conditions in the future. Developing future strategies for forest management in the face of uncertain and highly variable forecasts of future site conditions is a great challenge. Here we have analyzed transnational case studies dealing with different manifestations of climate change effects. We intend to stimulate the discussion on management strategies to adapt forests in the Alps to climate change risks. The presented results are derived from the INTERREG project “Management Strategies to Adapt Alpine Space Forests to Climate Change Risks” that was implemented within the framework of the European Territorial Cooperation “Alpine Space Programme 2007-2013.
    Pages: Online-Ressource (383 Seiten)
    ISBN: 9789535111948
    Language: English
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  • 23
    Unknown
    West Lafayette, Indiana : Purdue University Press
    Keywords: energy policy ; energy crisis ; climate change ; global warming ; alternative energy
    Description / Table of Contents: We are facing a global energy crisis caused by world population growth, an escalating increase in demand, and continued dependence on fossil-based fuels for generation. It is widely accepted that increases in greenhouse gas concentration levels, if not reversed, will result in major changes to world climate with consequential effects on our society and economy. This is just the kind of intractable problem that Purdue University’s Global Policy Research Institute seeks to address in the Purdue Studies in Public Policy series by promoting the engagement between policy makers and experts in fields such as engineering and technology. Major steps forward in the development and use of technology are required. In order to achieve solutions of the required scale and magnitude within a limited timeline, it is essential that engineers be not only technologically-adept but also aware of the wider social and political issues that policy-makers face. Likewise, it is also imperative that policy makers liaise closely with the academic community in order to realize advances. This book is designed to bridge the gap between these two groups, with a particular emphasis on educating the socially-conscious engineers and technologists of the future. In this accessibly-written volume, central issues in global energy are discussed through interdisciplinary dialogue between experts from both North America and Europe. The first section provides an overview of the nature of the global energy crisis approached from historical, political, and sociocultural perspectives. In the second section, expert contributors outline the technology and policy issues facing the development of major conventional and renewable energy sources. The third and final section explores policy and technology challenges and opportunities in the distribution and consumption of energy, in sectors such as transportation and the built environment. The book’s epilogue suggests some future scenarios in energy distribution and use.
    Pages: Online-Ressource (XIV, 304 Seiten)
    Edition: Knowledge Unlatched Open Access Edition
    ISBN: 9781612493091
    Language: English
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  • 24
    Unknown
    Ann Arbor, Michigan : Open Humanities Press
    Keywords: climate change
    Description / Table of Contents: This book argues that climate change has a devastating effect on how we think about the future. Once several positive feedback loops in Earth’s dynamic systems, such as the melting of the Arctic icecap or the drying of the Amazon, cross the point of no return, the biosphere is likely to undergo severe and irreversible warming. Nearly everything we do is premised on the assumption that the world we know will endure into the future and provide a sustaining context for our activities. But today the future of a viable biosphere, and thus the purpose of our present activities, is put into question. A disappearing future leads to a broken present, a strange incoherence in the feel of everyday life. We thus face the unprecedented challenge of salvaging a basis for our lives today. That basis, this book argues, may be found in our capacity to assume an infinite responsibility for ecological disaster and, like the biblical Job, to respond with awe to the alien voice that speaks from the whirlwind. By owning disaster and accepting our small place within the inhuman forces of the biosphere, we may discover how to live with responsibility and serenity whatever may come.
    ISBN: 9781607853145
    Language: English
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  • 25
    Unknown
    Rijeka : InTech
    Keywords: greenhouse gases ; global warming ; climate change
    Description / Table of Contents: Understanding greenhouse gas sources, emissions, measurements, and management is essential for capture, utilization, reduction, and storage of greenhouse gas, which plays a crucial role in issues such as global warming and climate change. Taking advantage of the authors' experience in greenhouse gases, this book discusses an overview of recently developed techniques, methods, and strategies: - A comprehensive source investigation of greenhouse gases that are emitted from hydrocarbon reservoirs, vehicle transportation, agricultural landscapes, farms, non-cattle confined buildings, and so on. - Recently developed detection and measurement techniques and methods such as photoacoustic spectroscopy, landfill-based carbon dioxide and methane measurement, and miniaturized mass spectrometer.
    Pages: Online-Ressource (514 Seiten)
    ISBN: 9789535103233
    Language: English
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  • 26
    Keywords: hydrology ; pollution ; climate change ; oceanography ; atmospheric sciences
    Description / Table of Contents: Irrigated agriculture is the most significant user of fresh water in the world and, due to the large area occupied, is one of the major pollution sources for the water resources. This book comprises 12 chapters that cover different issues and problematics of irrigated agriculture: from water use in different irrigated systems to pollution generated by irrigated agriculture. Moreover, the book also includes chapters that deal with new possibilities of improving irrigation techniques through the reuse of drainage water and wastewater, helping to reduce freshwater extractions. A wide range of issues is herein presented, related to the evaluation of irrigated agriculture impacts and management practices to reduce these impacts on the environment.
    Pages: Online-Ressource (246 Seiten)
    ISBN: 9789535104216
    Language: English
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  • 27
    Keywords: Australia ; environment ; climate change ; biogeography ; palaeoecology ; human ecology
    Description / Table of Contents: Like a star chart this volume orientates the reader to the key issues and debates in Pacific and Australasian biogeography, palaeoecology and human ecology. A feature of this collection is the diversity of approaches ranging from interpretation of the biogeographic significance of plant and animal distributional patterns, pollen analysis from peats and lake sediments to discern Quaternary climate change, explanation of the patterns of faunal extinction events, the interplay of fire on landscape evolution, and models of the environmental consequences of human settlement patterns. The diversity of approaches, geographic scope and academic rigor are a fitting tribute to the enormous contributions of Geoff Hope. As made apparent in this volume, Hope pioneered multidisciplinary understanding of the history and impacts of human cultures in the Australia- Pacific region, arguably the globe’s premier model systems for understanding the consequences of human colonization on ecological systems. The distinguished scholars who have contributed to this volume also demonstrate Hope’s enduring contribution as an inspirational research leader, collaborator and mentor. Terra Australis leave no doubt that history matters, not only for land management, but more importantly, in alerting settler and indigenous societies alike to their past ecological impacts and future environmental trajectories.
    Pages: Online-Ressource (512 Seiten)
    ISBN: 9781921666810
    Language: English
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  • 28
    Keywords: carbon ; energy ; climate change ; coal emissions ; energy efficiency
    Description / Table of Contents: This study from the Independent Evaluation Group draws lessons for development and climate change mitigation from the World Bank Group’s far-reaching portfolio of projects in energy, forestry, transport, coal power, and technology transfer. Reviewing what has worked, what hasn’t, and why, the evaluation’s key findings include: Energy efficiency can offer countries direct economic returns that dwarf those of most other development projects, while also reducing greenhouse gas emissions. Tropical forest protected areas, on average, significantly reduce tropical deforestation, preserving carbon and biodiversity. Deforestation rates are lower in areas that allowed sustainable use by local populations than in strictly protected areas. Deforestation rates were lowest of all in indigenous forest areas. For renewable energy projects, long-duration loans have been important in making projects financially viable.. But at prevailing carbon prices, carbon offset sales had little impact on most renewable energy projects’ rate of returns, and did not address investors’ need for up-front capital. Technology transfer – broadly understood to include diffusion of technical and financial innovations related to low-carbon development – has worked well when the logic of piloting and demonstration is well thought out, and when grants are used to mitigate the risk of pioneering efforts.
    Pages: Online-Ressource (XXXIX, 128 Seiten)
    ISBN: 9780821386545
    Language: English
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  • 29
    Keywords: china ; climate change ; east asia ; energy and environment ; energy efficiency ; energy financing ; energy policy ; renewable energy ; sustainable energy ; world bank
    Description / Table of Contents: East Asia has experienced the fastest economic growth in the world over the last three decades, accompanied by a 10-fold gross domestic product increase and rapid urbanization. Energy consumption has more than tripled during this period and is expected to double over the next 20 years. This remarkable trend has led to twin energy challenges in the region - environmental sustainability and energy security. Written for an audience of energy policy makers and practitioners, Winds of Change explores the region’s energy future over the next two decades through two energy scenarios. It outlines the strategic direction East Asia’s energy sector must take to meet its growing energy demand in an environmentally sustainable manner, and presents a pathway of policy frameworks and financing mechanisms to get there. The six East Asian countries - China, Indonesia, Malaysia, the Philippines, Thailand, and Vietnam - examined in this book could, with the right policies and financing, stabilize CO2 emissions by 2025, improve their local environment, and enhance energy security without compromising economic growth. They must move their energy sectors toward much higher efficiency and more widespread use of low-carbon technologies, while obtaining substantial financing and low-carbon technologies from developed countries. This clean energy revolution requires major policy and institutional reforms, including energy pricing reforms, regulations such as energy efficiency standards, financial incentives such as feed-in tariffs for renewable energy, and accelerated research and development. Finally, building low-carbon cities will be key to containing the rapid urban energy growth through compact urban design, public transport, clean vehicles, and green buildings. The window of opportunity is closing fast - delaying action would lock the region into a longlasting high-carbon infrastructure. The technical and policy means exist for such transformational changes, but only strong political will and unprecedented international cooperation will make them happen.
    Pages: Online-Ressource (XVII, 154 Seiten)
    ISBN: 978082138502
    Language: English
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  • 30
    Unknown
    Rijeka : InTech
    Keywords: climate change
    Description / Table of Contents: Climate change is emerging as one of the most important issues of our time, with the potential to cause profound cascading effects on ecosystems and society. However, these effects are poorly understood and our projections for climate change trends and effects have thus far proven to be inaccurate. In this collection of 24 chapters, we present a cross-section of some of the most challenging issues related to oceans, lakes, forests, and agricultural systems under a changing climate. The authors present evidence for changes and variability in climatic and atmospheric conditions, investigate some the impacts that climate change is having on the Earth's ecological and social systems, and provide novel ideas, advances and applications for mitigation and adaptation of our socio-ecological systems to climate change. Difficult questions are asked. What have been some of the impacts of climate change on our natural and managed ecosystems? How do we manage for resilient socio-ecological systems? How do we predict the future? What are relevant climatic change and management scenarios? How can we shape management regimes to increase our adaptive capacity to climate change? These themes are visited across broad spatial and temporal scales, touch on important and relevant ecological patterns and processes, and represent broad geographic regions, from the tropics, to temperate and boreal regions, to the Arctic.
    Pages: Online-Ressource (486 Seiten)
    ISBN: 9789533071442
    Language: English
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  • 31
    Keywords: cities ; climate change ; distaster risk management ; environmental buffers ; flooding ; urban development
    Description / Table of Contents: Urban flooding is a significant challenge which today increasingly confronts the residents of the expanding cities and towns of developing countries, as well as policymakers and national, regional and local government officials. The Global Handbook presents the state-of-the art in urban flood risk management in a thorough and user-friendly way. It serves as a primer in integrated urban flood risk management for technical specialists, decision-makers and other concerned stakeholders in the private and community sectors. It covers the causes, probability and impacts of floods; the measures that can be used to manage flood risk, balancing structural and non-structural solutions in an integrated fashion; and the means by which these measures can be financed and implemented, and their progress monitored and evaluated. The Handbook provides an operational guide on how most effectively to manage the risk of floods in rapidly urbanizing settings – and within the context of a changing climate.
    Pages: Online-Ressource (631 Seiten)
    ISBN: 9780821394779
    Language: English
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  • 32
    Unknown
    Rijeka : InTech
    Keywords: climate change ; climate policy ; sustainable development
    Description / Table of Contents: Anomalous climatic outcomes such as higher temperatures, intense rainfall and flood, frequent and severe droughts are now at the new level. Without appropriate adaptation measures, climate change is bound to exacerbate vulnerability of society, place food security and human health at risk, threaten the lives of growing urban population and impede the goal of attaining sustainable development. The human and social dimensions of climate change, including climate policy, are essential parts of our response to the many challenges emanating from climate change. By focusing on a wide range of topics and involving a diverse array of scholars, this book sheds lights on human and social dimensions of climate change; topics neglected and often poorly understood by scholars and policymakers.
    Pages: Online-Ressource (286 Seiten)
    ISBN: 9789535108474
    Language: English
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  • 33
    Unknown
    Rijeka : InTech
    Keywords: earth and planetary sciences ; oceanography and atmospheric sciences ; climate change
    Pages: Online-Ressource (247 Seiten)
    ISBN: 9789535111320
    Language: English
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  • 34
    Unknown
    Washington, D. C. : The World Bank
    Keywords: adaptation ; climate change ; climate projections
    Description / Table of Contents: While the energy sector is a primary target of efforts to arrest and reverse the growth of greenhouse gas emissions and lower the carbon footprint of development, it is also expected to be increasingly affected by unavoidable climate consequences from the damage already induced in the biosphere. Energy services and resources, as well as seasonal demand, will be increasingly affected by changing trends, increasing variability, greater extremes and large inter-annual variations in climate parameters in some regions. All evidence suggests that adaptation is not an optional add-on but an essential reckoning on par with other business risks. Existing energy infrastructure, new infrastructure and future planning need to consider emerging climate conditions and impacts on design, construction, operation, and maintenance. Integrated risk-based planning processes will be critical to address the climate change impacts and harmonize actions within and across sectors. Also, awareness, knowledge, and capacity impede mainstreaming of climate adaptation into the energy sector. However, the formal knowledge base is still nascent—information needs are complex and to a certain extent regionally and sector specific. This report provides an up-to-date compendium of what is known about weather variability and projected climate trends and their impacts on energy service provision and demand. It discusses emerging practices and tools for managing these impacts and integrating climate considerations into planning processes and operational practices in an environment of uncertainty. It focuses on energy sector adaptation, rather than mitigation which is not discussed in this report. This report draws largely on available scientific and peer-reviewed literature in the public domain and takes the perspective of the developing world to the extent possible.
    Pages: Online-Ressource (XXXIX, 178 Seiten)
    ISBN: 9780821386989
    Language: English
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  • 35
    Keywords: poverty reduction ; governance ; social justice ; energy efficiency ; social protection ; vulnerability ; climate ; climate change ; global warming ; emissions ; carbon ; equity ; renewable energy ; forest
    Description / Table of Contents: Climate change is arguably the most profound challenge facing the international community in the 21st century. It is as much a challenge for poverty reduction, growth, and development as it is a global environmental issue. Climate change could undermine or reverse progress in reducing poverty and attaining the Millennium Development Goals, thereby unraveling many of the development gains of recent decades. It already threatens the livelihoods, health, and well-being of millions of people worldwide, particularly the poorest, most vulnerable groups. This book focuses attention on these previously neglected and poorly understood social dimensions of climate change. It highlights equity and vulnerability as central organizing themes and illustrates the multiple ways that pro-poor climate policy and action should be integrated into existing approaches to poverty reduction and development—from the local to the global levels. This integration is needed both in terms of pro-poor approaches to climate change adaptation and in terms of better managing the social risks and potential benefits associated with measures to reduce greenhouse gas emissions.
    Pages: Online-Ressource (XXIII, 319 Seiten)
    ISBN: 9780821381427
    Language: English
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  • 36
    Unknown
    Washington, D. C. : The World Bank
    Keywords: alternative energy ; sustainable forest management ; carbon finance ; carbon ; forests ; climate change ; biodiversity conservation ; emissions ; oceans ; silver ; colors ; carbon sinks ; carbon offsets ; climate ; ecosystem ; emissions from deforestation ; coral reefs ; carbon stores ; forest ; sustainable forest
    Description / Table of Contents: Global warming and changes in climate will have severe and lasting impacts on national efforts to alleviate poverty and promote sustainable development. Some of the world s poorest countries and communities are the most vulnerable and are already suffering the consequences. Yet often these countries are rich in natural capital, ecosystems, and biodiversity that can contribute to solutions as they can to climate change. Biodiversity is the foundation and mainstay of agriculture, forests, and fisheries. Biological resources provide the raw materials for livelihoods, agriculture, medicines, trade, tourism, and industry. Forests, grasslands, freshwater, and marine and other natural ecosystems provide a range of services, often not recognized in national economic accounts but vital to human welfare: regulating water flows and water quality, flood control, pollination, decontamination, carbon sequestration, soil conservation, and nutrient and hydrological cycling. Current efforts to address climate change focus mainly on reducing emissions of greenhouse gases, mainly through cleaner energy strategies, and on attempting to reduce vulnerability of the communities at risk by improving infrastructure to meet new energy and water needs. This book book sets out a compelling argument for including ecosystem-based approaches to mitigation and adaptation as a third essential pillar in national strategies to address climate change. Such ecosystem-based strategies can offer cost-effective, proven and sustainable solutions contributing to, and complementing, other national and regional adaptation strategies.
    Pages: Online-Ressource (XII, 114 Seiten)
    ISBN: 9780821381274
    Language: English
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  • 37
    Unknown
    Washington, D.C. : The World Bank
    Keywords: adaptation ; caribbean ; climate change ; community ; indigenous peoples ; latin america ; livelihoods ; poverty ; rural development ; vulnerability
    Description / Table of Contents: This book addresses the implications of climate change on indigenous peoples and communities living in the highlands, lowlands, and coastal areas of Latin America and the Caribbean. Across the region, indigenous people already experience the negative effects of climate change and variability. Their livelihoods are threatened by insecure food supplies and poor health. In addition, their cultural integrity is challenged: Indigenous peoples often blame themselves for the changes they observe in nature, despite their limited emission of greenhouse gasses. This book shows the complexity of how indigenous communities are affected by climate change, explores options for improving resilience, and provides guidance in the design of effective and sustainable adaptations. 'Changing climates of the world create new challenges not only for mainstream societies, but for indigenous and subsistence societies as well. The marginalized populations of Latin America and the Caribbean (LAC) have long paid a price for their isolation from the colonial societies, but now the natural foundations of their marginal, traditional habitats and cultural spaces are being changed in ways that are yet to be fathomed. Kronik and Verner systematically and fairly thoroughly substantiate the effects of changing climate on the flora and fauna and patterns of life among indigenous populations in four regions of LAC: the Amazon, Andean and sub-Andean South America, and the Caribbean. Examinations of the vulnerabilities, adjustments, and potential adaptations of an assortment of peoples in each region illuminate the complexities of understanding what the world is up against with climate change, and can help to inform thinking about how the future will unfold. An extraordinary report of rigorous research that ought to be replicated everywhere.
    Pages: Online-Ressource (XVI, 185 Seiten)
    ISBN: 9780821383810
    Language: English
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  • 38
    Keywords: climate change ; glaciers ; Peru ; Andes ; water regulation
    Description / Table of Contents: Climate change is beginning to have effects on climate, weather and resource availability in ways that need to be anticipated when planning for the future. In particular, changes in rainfall patterns and temperature may impact the intensity or schedule of water availability. Also the retreat of tropical glaciers, the drying of unique Andean wetland ecosystems, as well as increased weather variability and weather extremes will affect water regulation. These changes have the potential to impact the energy and other sectors, such as agriculture, and could have broader economic effects. Anticipating the impacts of climate change is a new frontier. There are few examples of predictions of the impact of climate change on resource availability and even fewer examples of the applications of such predictions to planning for sustainable economic development. However, having access to an effective methodology would allow planners and policy makers to better plan for adaptation measures to address the consequences of climate change on the power and water sectors. This report presents a summary of the efforts to develop methodological tools for the assessment of climate impacts on surface hydrology in the Peruvian Andes. It is targeted to decision makers in Peru and in other countries to give them guidance on how to choose available and suitable tools and make an assessment of climate impacts on water regulation.
    Pages: Online-Ressource (XIX, 157 Seiten)
    ISBN: 9780821386637
    Language: English
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  • 39
    Keywords: bulk water ; climate change ; equitable access ; large dams ; river basins ; water conservation ; water infrastructure ; water legislation ; water management ; water quality ; water resources ; water supply ; water use
    Description / Table of Contents: The past decade has witnessed a major global shift in thinking about water, including the role that water infrastructure plays in sustainable development. This rethinking aims to balance better the social, economic, and environmental performance aspects in the development and management of large dams. Infrastructure strategies must complement strategies for water, environment, and energy security and for emerging concerns to reduce vulnerability in water resource systems to climate change on the horizon. Communication is central to multi-stakeholder dialogue and partnerships at all levels needed to achieve sustainability and governance reform in water resource management and infrastructure provision. At the same time, communication drives the advocacy to mobilize political will and public support for beneficial change and continuous improvement in practices. This case study emphasizes that is not only important to mobilize all opportunities to reconcile water demand and supply in river basins that are coming under increasing levels of water stress, but also to integrate effectively governance and anti-corruption reforms and sustainability improvements into all stages of the planning and project cycle - adding value for stakeholders.
    Pages: Online-Ressource (XIII, 116 Seiten)
    ISBN: 9780821384343
    Language: English
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  • 40
    Keywords: climate change ; emissions ; poverty
    Description / Table of Contents: This book provides the latest knowledge and practice in responding to the challenge of climate change in cities. Case studies focus on topics such as New Orleans in the context of a fragile environment, a framework to include poverty in the cities and climate change discussion, and measuring the impact of GHG emissions.
    Pages: Online-Ressource (XIV, 306 Seiten)
    ISBN: 9780821386675
    Language: English
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  • 41
    Unknown
    Venezia : Università Iuav di Venezia
    Keywords: climate change ; urbanisme ; Veneto region ; water ; waterscape
    Description / Table of Contents: “Extreme City - Climate change and the transformation of the waterscape” is the book about the results of the Intensive Learning Programme held recently at the Iuav University (Venice, 3rd – 15th April 2010) with the projectual explorations of the EMU students and the teachers contributions. The goals of the intensive programme have been to deal with changes in the water space in climate change conditions. A “research by design” approach was chosen as the starting point of a reflection on techniques and forms of knowledge which use the project to tackle complex issues. A multidisciplinary approach has been proposed to deal with the vulnerability of a dispersedly inhabited region.
    Pages: Online-Ressource (289 Seiten)
    ISBN: 9788887697438
    Language: English
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  • 42
    Keywords: climate change ; global warming
    Description / Table of Contents: This book addresses the theme of the impacts of global warming on different specific fields, ranging from the regional and global economy, to agriculture, human health, urban areas, land vegetation, marine areas and mangroves. Despite the volume of scientific work that has been undertaken in relation to each of each of these issues, the study of the impacts of global warming upon them is a relatively recent and unexplored topic. The chapters of this book offer a broad overview of potential applications of global warming science. As this science continues to evolve, confirm and reject study hypotheses, it is hoped that that this book will stimulate further developments in relation to the impacts of changes in the global climate.
    Pages: Online-Ressource (290 Seiten)
    ISBN: 9789533077857
    Language: English
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  • 43
    Unknown
    Paris : OECD/IEA (Please request login data at the PIK library)
    Keywords: energy ; wind power ; solar photovoltaics ; climate change ; electricity ; renewable energy ; energy security
    Description / Table of Contents: Wind power and solar photovoltaics (PV) are crucial to meeting future energy needs while decarbonising the power sector. Deployment of both technologies has expanded rapidly in recent years, one of the few bright spots in an otherwise bleak picture of clean energy progress. However, the inherent variability of wind power and solar PV raises unique and pressing questions. Can power systems remain reliable and cost-effective while supporting high shares of variable renewable energy (VRE)? And if so, how? Based on a thorough review of the integration challenge, this publication - gauges the economic significance of VRE integration impacts - highlights the need for a system-wide approach to integrating high shares of VRE - recommends how to achieve a cost-effective transformation of the power system. This book summarises the results of the third phase of the Grid Integration of VRE (GIVAR) project, undertaken by the IEA over the past two years. It is rooted in a set of seven case studies, comprising 15 countries on four continents. It deepens the technical analysis of previous IEA work and lays out an analytical framework for understanding the economics of VRE integration impacts. Based on detailed modelling, the impact of high shares of VRE on total system costs is analysed. In addition, the four flexible resources which are available to facilitate VRE integration – generation, grid infrastructure, storage and demand side integration – are assessed in terms of their technical performance and cost-effectiveness.
    Pages: Online-Ressource (234 Seiten)
    ISBN: 9789264208032
    Language: English
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  • 44
    Keywords: archaeology ; northern Australia ; environment ; climate change
    Description / Table of Contents: The research presented here is primarily concerned with human-environment interactions on the tropical coast of northern Australia during the late Holocene. Based on the suggestion that significant change can occur within short time-frames as a direct result of interactive processes, the archaeological evidence from the Point Blane Peninsula, Blue Mud Bay, is used to address the issue of how much change and variability occurred in hunter-gatherer economic and social structures during the late Holocene in coastal northeastern Arnhem Land. The suggestion proposed here is that processes of environmental and climatic change resulted in changes in resource distribution and abundance, which in turn affected patterns of settlement and resource exploitation strategies, levels of mobility and, potentially, the size of foraging groups on the coast. The question of human behavioural variability over the last 3000 years in Blue Mud Bay has been addressed by examining issues of scale and resolution in archaeological interpretation, specifically the differential chronological and spatial patterning of shell midden and mound sites on the peninsula in conjunction with variability in molluscan resource exploitation. To this end, the biological and ecological characteristics of the dominant molluscan species is considered in detail, in combination with assessing the potential for human impact through predation. Investigating pre-contact coastal foraging behaviour via the archaeological record provides an opportunity for change to recognised in a number of ways. For example, a differential focus on resources, variations in group size and levels of mobility can all be identified. It has also been shown that human-environment interactions are non-linear or progressive, and that human behaviour during the late Holocene was both flexible and dynamic.
    Pages: Online-Ressource (XIX, 216 Seiten)
    ISBN: 9781925021103
    Language: English
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  • 45
    Unknown
    Basel, Beijing, Wuhan : MDPI
    Keywords: water policy design ; economic efficiency and productivity ; water markets ; climate change ; evaluation instruments
    Description / Table of Contents: Over the past few decades, water policies have undergone significant changes in many countries, notably due to the development of national and international political, social, and environmental issues, including globalization, trade liberalization, institutional and legal requirements, changing standards of living, management practices, and technological innovation. Policy changes include both “high level” views about water status and practical instruments, in particular with an emphasis on integrated basin management and economic policy instruments. A relevant part of the water policy literature addresses this topic, mainly as an issue related to environmental conservation. However, water remains a major productive factor, particularly in agriculture. This role is made even more prominent in light of economic crises, increased competition across markets and climate change, as well as fossil energy limitations, which also highlight the water–energy nexus as a key resource issue for future economic viability. The delay, in the past, in recognizing the economic consequences of a limited water supply, and in decoupling economic development from water demand and supply, has resulted in a water-dependent growth model, currently threatened by increasing scarcity and droughts. Consequently, there is now an urgent need for new perspectives for promoting a more sustainable and efficient use of water resources. This calls for, on the one hand, a comprehensive understanding of water efficiency and productivity and, on the other hand, an investigation of the linkages among economic sectors to illustrate trade-offs in water reallocations. In addition, this also points to the need to study the institutional innovations and economic evaluation instruments that are able to better assess policy performance and provide evidence for improved mechanism designs aimed specifically at water efficiency and productivity.
    Pages: Online-Ressource (VII, 202 Seiten)
    Edition: Printed Edition of the Special Issue Published in Water
    ISBN: 9783038420132
    Language: English
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  • 46
    Publication Date: 2021-05-07
    Description: Der Vergleich von „multiple aliquot“ Protokoll basierten IRSL- und TL-Altern mit denen von „single aliquot regenerative“ Protokollen mittels des post-IR IRSL (225°C) und fading-korrigierten IR (50°C) zeigt, dass Signalverlust durch anomales Ausheilen für Lösse und Lössderivate des Schwalbenberg II Profils ein geringes Problem darstellt. Aus diesem Grund ist es sehr wahrscheinlich, dass auf „multiple aliquot“ Messprotokollen beruhende Lumineszenz-Datierungen, die in den 1990er Jahren im allgemeinen für Lösse aus dem Mittelrheingebiet angewendet wurden, bis zu einem Alter von 70–80 ka innerhalb der 1-sigma Fehlerabweichung verlässliche IRSL und TL-Alter ergeben haben. Die Löss-/Paläobodensedimente des Schwalbenberg II Lössprofils zeigen einen bemerkenswert detaillierte weichselzeitliche mittelpleniglaziale Abfolge, die mit dem marinen Sauerstoffisotopenstadium 3 korreliert wird. Ein verlässlicher chronologischer Rahmen wurde durch Lumineszenz-Datierungsmethoden bestimmt. Vier Löss-Hauptakkumulationsphasen konnten für die letztglaziale Abfolge vom Schwalbenberg nachgewiesen werden. Die chronologischen Ergebnisse unterstützen die litho-pedologische Korrelation der Hesbaye Formation mit MIS 2 und der Ahrgau Formation mit MIS 3. Aufgrund von litho-pedologischen Befunden wird die Keldach Formation mit MIS 4 korreliert. Die Lumineszenz-Alter von 55 bis 45 ka legen jedoch eine Korrelation mit MIS 3 nahe.
    Description: research
    Keywords: 551.7 ; VAR 000 ; Glazialgeologie ; pleistocene ; germany ; loess ; pléistocène ; climate change ; luminescence dating
    Language: English
    Type: article , publishedVersion
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  • 47
    Publication Date: 2021-03-29
    Description: Es wurden in dieser kurzen Arbeit Literaturangaben über die quartären Klimaänderungen gesammelt, die aus dem karibischen Gebiet und den benachbarten Teilen Südamerikas bekannt sind. Man kann feststellen, daß in Kolumbien, Nordwest-Venezuela, Aruba, Curasao, Bonaire und Barbados pluviale Perioden etwa synchron waren mit den Glazialen in Gebieten höherer Breite. Die Daten aus Guyana und Suriname lassen zwar noch keine endgültigen Schlüsse zu, doch deutet vieles darauf hin, daß dort während der Glazialzeiten trockenere klimatische Bedingungen herrschten als heute. Das würde einer Verschiebung der „ariden" Zone um etwa 10° entsprechen.
    Description: research
    Keywords: 551.7 ; VAR 000 ; Glazialgeologie ; caribbean ; netherlands ; venezuela ; quaternary ; climate change ; south america ; colombia ; leeward islands ; antilles ; barbados ; guyana ; surinam
    Language: English
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  • 48
    Publication Date: 2021-09-27
    Description: The magnitudes of river floods in Europe have been observed to change, but their alignment with changes in the spatial coverage or extent of individual floods has not been clear. We analyze flood magnitudes and extents for 3,872 hydrometric stations across Europe over the past five decades and classify each flood based on antecedent weather conditions. We find positive correlations between flood magnitudes and extents for 95% of the stations. In central Europe and the British Isles, the association of increasing trends in magnitudes and extents is due to a magnitude-extent correlation of precipitation and soil moisture along with a shift in the flood generating processes. The alignment of trends in flood magnitudes and extents highlights the increasing importance of transnational flood risk management.
    Keywords: 551.48 ; flood ; synchrony ; magnitude ; climate change ; classification ; spatial statistics
    Language: English
    Type: map
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  • 49
    Publication Date: 2021-10-15
    Description: Wetlands such as bogs, swamps, or freshwater marshes are hotspots of biodiversity. For 5.1 million km2 of inland wetlands, the dynamics of area and water storage, which strongly impact biodiversity and ecosystem services, were simulated using the global hydrological model WaterGAP. For the first time, the impacts of both human water use and man-made reservoirs (WUR) and future climate change (CC) on wetlands around the globe were quantified. WUR impacts are concentrated in arid/semiarid regions, where WUR decreased mean wetland water storage by more than 5% on 8.2% of the mean wetland area during 1986–2005 (Am), with highest decreases in groundwater depletion area. Using output of three climate models, CC impacts on wetlands were quantified, distinguishing unavoidable impacts [i.e., at 2 °C global warming (GW)] from avoidable impacts (difference between 3 °C and 2 °C impacts). Even unavoidable CC impacts are projected to be much larger than WUR impacts, also in arid/semiarid regions. On most wetland area with reliable estimates, avoidable CC impacts are more than twice as large as unavoidable impacts. In case of 2 °C GW, half of Am is estimated to be unaffected by mean storage changes of more than 5%, but only one third in case of 3 °C GW. Temporal variability of water storage will increase for most wetlands. Wetlands in dry regions will be affected the most, particularly by water storage decreases in the dry season. Different from wealthier countries, low-income countries will dominantly suffer from a decrease in wetland water storage due to CC.
    Keywords: 333.7 ; climate change ; water storage ; water use ; wetland ; reservoirs ; global
    Language: English
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  • 50
    Publication Date: 2021-10-12
    Description: Recent evidence shows that wind-driven ocean currents, like the western boundary currents, are strongly affected by global warming. However, due to insufficient observations both on temporal and spatial scales, the impact of climate change on large-scale ocean gyres is still not clear. Here, based on satellite observations of sea surface height and sea surface temperature, we find a consistent poleward shift of the major ocean gyres. Due to strong natural variability, most of the observed ocean gyre shifts are not statistically significant, implying that natural variations may contribute to the observed trends. However, climate model simulations forced with increasing greenhouse gases suggest that the observed shift is most likely to be a response of global warming. The displacement of ocean gyres, which is coupled with the poleward shift of extratropical atmospheric circulation, has broad impacts on ocean heat transport, regional sea level rise, and coastal ocean circulation.
    Keywords: 551.46 ; ocean gyre ; climate change ; poleward shift ; global warming ; ocean circulation ; sea level rise
    Language: English
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  • 51
    Publication Date: 2021-09-24
    Description: Meteorological droughts have large impacts on society and the environment. A better understanding and quantification of their occurrences can be highly relevant for the development of proper climate change mitigation, adaptation and resilience strategies. Here we examine meteorological droughts from observed data covering the 1971–2000 period for the Fulda catchment in Germany by means of the Standardized Precipitation Index. The joint dependency of drought duration and severity is modelled by a copula function, which relates their univariate distributions in a functional relationship. Recurrence intervals are further calculated as a function of the joint relationship and univariate marginals. Future projections are investigated in which downscaled EURO-CORDEX Regional Climate Model (RCM) projections for the period 2021–2050 are used together with the three Representative Concentration Pathways (RCP) 2.6, 4.5, and 8.5, in order to analyse and compare future joint patterns of duration and severity of events. We find that drought duration and severity present a clear interdependency supporting the choice of a bivariate model. Results suggest substantial differences in the future joint relationship duration–severity. Depending on the RCM and RCP, drought patterns show different magnitude of changes in the future. The projected changes are different for the different returns periods. RCP8.5 shows more severe events and longer drought durations than RCP2.6 and RCP4.5. The uncertainties of the projected patterns also depend on the RCP and RCM and are larger for higher return periods.
    Keywords: 551.6 ; climate change ; copulas ; drought duration and severity ; drought events ; extremes ; Fulda catchment ; Standardized Precipitation Index
    Language: English
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  • 52
    Publication Date: 2021-09-06
    Description: Abstract Global climate models provide only partial information on local-scale phenomenon, such as precipitation, primarily due to their coarse resolution. In this study, statistical downscaling algorithms, based on both weather regimes and past analogues, are operated for 18 Israeli rain gauges with an altitude ranging between −200 and ~1,000 m above sea level (ASL). To project seasonal precipitation over Israel and its hydrologic basins, the algorithms are applied to six Coupled Model Inter-comparison Project Phase 5 (CMIP5) models for the end of the 21st century, according to the RCP4.5 and RCP8.5 scenarios. The downscaled models can capture quite well the seasonal precipitation distribution, though with underestimation in winter and overestimation in spring. All models display a significant reduction of seasonal precipitation for the 21st century according to both scenarios. The winter reductions for the end of the century and the RCP8.5 scenario are found to be ~22 and ~37% according to the weather regimes and the analogues downscaling methods, respectively. Spring reductions are found to be ~10–20% larger than winter reductions. It is shown that the projected reduction results from a decrease in the frequency of the rain-bearing systems, as well as a decrease in the average daily precipitation intensity. The areas with the largest reductions in seasonal precipitation are found over the central mountains, the Mediterranean coastal area, and the Sea of Galilee hydrologic basins, which are the main fresh-water aquifers and reservoirs of Israel. The statistical downscaling methods applied in this study can be easily transferred to other regions where long-term data sets of observed precipitation are available. This study and others may serve as a basis for priority and policy setting toward better climate adaptation with associated uncertainties related to the methods used and nonstationary of the climate system.
    Keywords: 551.6 ; analogues downscaling ; climate change ; CMIP5 predictions ; Eastern Mediterranean ; seasonal precipitation ; synoptic classification ; weather regimes
    Language: English
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  • 53
    Publication Date: 2021-10-06
    Description: Climate change is expected to enhance the hydrological cycle in northern latitudes reducing the salinity in the Baltic Sea, a land-locked marginal sea with a large catchment area located in northern Europe. With the help of ocean simulations forced by historical atmospheric and hydrological reconstructions and local observations, we analyzed long-term changes in the sea surface salinity of the Baltic Sea as well as its latitudinal gradient. The variability of both is dominated by multidecadal oscillations with a period of about 30 years, while both atmospheric variables, wind and river runoff, contribute to this variability. Centennial changes show a statistically significant positive trend in the North-South gradient of sea surface salinity for 1900–2008. This change is mainly attributed to increased river runoff from the northernmost catchment indicating a footprint of the anthropogenic impact on salinity with consequences for the marine ecosystem and species distributions.
    Keywords: 551.46 ; Baltic Sea ; salinity ; river runoff ; climate change
    Language: English
    Type: map
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  • 54
    Publication Date: 2021-10-25
    Description: Ocean heat transport is often thought to play a secondary role for Arctic surface warming in part because warm water which flows northward is prevented from reaching the surface by a cold and stable halocline layer. However, recent observations in various regions indicate that occasionally, warm water is found directly below the surface mixed layer. Here we investigate Arctic Ocean surface energy fluxes and the cold halocline layer in climate model simulations from the Coupled Model Intercomparison Project Phase 5. An ensemble of 15 models shows decreased sea ice formation and increased ocean energy release during fall, winter, and spring for a high-emission future scenario. Along the main pathways for warm water advection, this increased energy release is not locally balanced by increased Arctic Ocean energy uptake in summer. Because during Arctic winter, the ocean mixed layer is mainly heated from below, we analyze changes of the cold halocline layer in the monthly mean Coupled Model Intercomparison Project Phase 5 data. Fresh water acts to stabilize the upper ocean as expected based on previous studies. We find that in spite of this stabilizing effect, periods in which warm water is found directly or almost directly below the mixed layer and which occur mainly in winter and spring become more frequent in high-emission future scenario simulations, especially along the main pathways for warm water advection. This could reduce sea ice formation and surface albedo.
    Keywords: 551.46 ; 551.6 ; Arctic ; climate change ; cold halocline ; climate modeling
    Language: English
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  • 55
    Publication Date: 2021-10-25
    Description: Corporate carbon performance (CCP) has become a central topic in political, financial, and academic domains. At the same time, several characteristics of CCP data, including comparability and consistency, remain unresolved. The literature has extensively covered issues regarding the comparability of CCP data from a firm-internal perspective. However, it has not yet examined the consistency of CCP data between third-party data providers. This article investigates the degree of CCP data consistency between third-party providers according to three dimensions: scope (i.e., direct and indirect emissions), scheme (i.e., mandatory and voluntary reporting schemes), and source (i.e., data stemming from corporate reports and from third-party estimation methods). The results reveal that data on direct emissions are more consistent than data on indirect emissions, and they are especially inconsistent for Scope 3. Second, mandatory and voluntary reporting schemes do not substantially improve the consistency of CCP data, which is surprising. Third, third-party estimations are less consistent as compared to data stemming directly from corporate reports; however, the combination of Scopes 1 and 2 third-party estimated data raises consistency levels. On the basis of these results, we conclude the following key implications: academic researchers must be mindful of the consistency of CCP data, because it can significantly affect empirical results, corporate management should avoid situations where different CCP data are communicated externally, investors should engage firms to follow a standardized approach, data providers should increase the transparency about their estimation methods, and policy makers need to be aware of the importance of a sound and standardized methodology to determine CCP.
    Keywords: 304.2 ; climate change ; corporate carbon performance ; data consistency ; estimation method ; industrial ecology ; third-party provider
    Language: English
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  • 56
    Publication Date: 2020-02-12
    Description: On 12 September 2007, an Mw 8.4 earthquake occurred within the southern section of the Mentawai segment of the Sumatra subduction zone, where the subduction thrust had previously ruptured in 1833 and 1797. Traveltime data obtained from a temporary local seismic network, deployed between December 2007 and October 2008 to record the aftershocks of the 2007 event, was used to determine two-dimensional (2-D) and three-dimensional (3-D) velocity models of the Mentawai segment. The seismicity distribution reveals significant activity along the subduction interface and within two clusters in the overriding plate either side of the forearc basin. The downgoing slab is clearly distinguished by a dipping region of high Vp (8.0 km/s), which can be a traced to ∼50 km depth, with an increased Vp/Vs ratio (1.75 to 1.90) beneath the islands and the western side of the forearc basin, suggesting hydrated oceanic crust. Above the slab, a shallow continental Moho of less than 30 km depth can be inferred, suggesting that the intersection of the continental mantle with the subducting slab is much shallower than the downdip limit of the seismogenic zone despite localized serpentinization being present at the toe of the mantle wedge. The outer arc islands are characterized by low Vp (4.5–5.8 km/s) and high Vp/Vs (greater than 2.0), suggesting that they consist of fluid saturated sediments. The very low rigidity of the outer forearc contributed to the slow rupture of the Mw 7.7 Mentawai tsunami earthquake on 25 October 2010.
    Keywords: 550 - Earth sciences
    Language: English
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  • 57
    Publication Date: 2020-02-12
    Description: On 2012 May 20 and 29, two damaging earthquakes with magnitudes Mw 6.1 and 5.9, respectively, struck the Emilia-Romagna region in the sedimentary Po Plain, Northern Italy, causing 26 fatalities, significant damage to historical buildings and substantial impact to the economy of the region. The earthquake sequence included four more aftershocks with Mw ≥ 5.0, all at shallow depths (about 7–9 km), with similar WNW–ESE striking reverse mechanism. The timeline of the sequence suggests significant static stress interaction between the largest events. We perform here a detailed source inversion, first adopting a point source approximation and considering pure double couple and full moment tensor source models. We compare different extended source inversion approaches for the two largest events, and find that the rupture occurred in both cases along a subhorizontal plane, dipping towards SSW. Directivity is well detected for the May 20 main shock, indicating that the rupture propagated unilaterally towards SE. Based on the focal mechanism solution, we further estimate the co-seismic static stress change induced by the May 20 event. By using the rate-and-state model and a Poissonian earthquake occurrence, we infer that the second largest event of May 29 was induced with a probability in the range 0.2–0.4. This suggests that the segment of fault was already prone to rupture. Finally, we estimate peak ground accelerations for the two main events as occurred separately or simultaneously. For the scenario involving hypothetical rupture areas of both main events, we estimate Mw = 6.3 and an increase of ground acceleration by 50 per cent. The approach we propose may help to quantify rapidly which regions are invested by a significant increase of the hazard, bearing the potential for large aftershocks or even a second main shock.
    Keywords: 550 - Earth sciences
    Language: English
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  • 58
    Publication Date: 2020-02-12
    Description: In the framework of the Dead Sea Integrated Research project (DESIRE), 59 seismological stations were deployed in the region of the Dead Sea Basin. Twenty of these stations recorded data of sufficiently high quality between May and September 2007 to be used for ambient seismic noise analysis. Empirical Green’s functions are extracted from cross-correlations of long term recordings. These functions are dominated by Rayleigh waves, whose group velocities can be measured in the frequency range from 0.1 to 0.5 Hz. Analysis of positive and negative correlation lags of the Green’s functions makes it possible to identify the direction of the source of the incoming energy. Signals with frequencies higher than 0.2 Hz originate from the Mediterranean Sea, while low frequencies arrive from the direction of the Red Sea. Travel times of the extracted Rayleigh waves were measured between station pairs for different frequencies, and tomographically inverted to provide independent velocity models. Four such 2D models were computed for a set of frequencies, all corresponding to different sampling depths, and thus together giving an indication of the velocity variations in 3D extending to a depth of 10 km. The results show low velocities in the Dead Sea Basin, consistent with previous studies suggesting up to 8 km of recent sedimentary infill in the Basin. The complex structure of the western margin of the Basin is also observed, with sedimentary infill present to depths not exceeding 5 km west of the southern part of the Dead Sea. The high velocities associated with the Lisan salt diapir are also observed down to a depth of ~5 km. The reliability of the results is confirmed by checkerboard recovery tests.
    Keywords: 550 - Earth sciences
    Language: English
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  • 59
    Publication Date: 2020-02-12
    Description: The Sumatra-Andaman earthquake with a magnitude of 9.3, and the subsequent destructive tsunami which caused more than 225 000 fatalities in the region of the Indian Ocean, happened on 26 December 2004. Less than one month later, the United Nations (UN) World Conference on Disaster Reduction took place in Kobe, Japan to commemorate the 1995 Kobe earthquake. The importance of preparedness and awareness on regional, national and community levels with respect to natural disasters was discussed during this meeting, and resulted in the approval of the Hyogo Declaration on Disaster Reduction. Based on this declaration the UN mandated the Intergovernmental Oceanographic Commission (IOC) of UNESCO (United Nations Education, Science and Cultural Organization), taking note of its over 40 years of successful coordination of the Pacific Tsunami Warning System (PTWC), to take on the international coordination of national early-warning efforts for the Indian Ocean and to guide the process of setting up a Regional Tsunami Early Warning System for the Indian Ocean.
    Keywords: 550 - Earth sciences
    Language: English
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  • 60
    Publication Date: 2020-02-12
    Description: Results obtained from S and P receiver functions produced a clear image of the top and bottom of the subducting Nazca lithosphere beneath northern Chile. Using data from the teleseismic events recorded at 15 permanent Integrated Plate Boundary Observatory Chile (IPOC) stations, we obtained new constraints on the geometry and thickness of the descending Nazca lithosphere. We observed the subducted crust of the Nazca plate at depths ranging from 50 km beneath the Coastal Cordillera down to 110 km beneath the Western Cordillera. We found significant along‐strike variations in the geometry of the Nazca plate beneath northern Chile. On closer inspection, it appears that the oceanic Nazca plate is divided into two distinct segments as it descends beneath the continental South American plate. The transition from the relatively steeper (∼23°) and deeper slab to the north of 21°S to the flatter southern segment (∼19°) is shown reasonably clearly by our data. This feature could well be associated with variations in the curvature of the plate margin and the geometry of the Chile trench, which is mainly curved to the north of 21°S. We have also mapped the continental Moho of the South American plate at depths ranging between 60 and 70 km to the east of the Longitudinal Valley. Beneath the Coastal Cordillera, this boundary becomes invisible, probably due to the serpentinization of the forearc mantle wedge that reduces the velocity in the uppermost mantle. The base of the subducted Nazca plate was clearly identified as a sharp boundary in the results obtained from the P and S receiver functions. The thickness of the subducted oceanic Nazca plate, which has an age of ∼50 My, is estimated to be ∼50 km. Although this thickness is consistent with that predicted by thermal gradients, the explanation of the sharpness of the lithosphere‐asthenosphere boundary may require another mechanism such as hydration or melting.
    Keywords: 550 - Earth sciences
    Language: English
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  • 61
    facet.materialart.
    Unknown
    In:  Journal of Seismology
    Publication Date: 2020-02-12
    Description: An early detection of the presence of rupture directivity plays a major role in the correct estimation of ground motions and risks associated to the earthquake occurrence. We present here a simple method for a fast detection of rupture directivity, which may be additionally used to discriminate fault and auxiliary planes and have first estimations of important kinematic source parameters, such as rupture length and rupture time. Our method is based on the inversion of amplitude spectra from P-wave seismograms to derive the apparent duration at each station and on the successive modelling of its azimuthal behaviour. Synthetic waveforms are built assuming a spatial point source approximation, and the finite apparent duration of the spatial point source is interpreted in terms of rupture directivity. Since synthetic seismograms for a point source are calculated very quickly, the presence of directivity may be detected within few seconds, once a focal mechanism has been derived. The method is here first tested using synthetic datasets, both for linear and planar sources, and then successfully applied to recent Mw 6.2–6.8 shallow earthquakes in Peloponnese, Greece. The method is suitable for automated application and may be used to improve kinematic waveform modelling approaches.
    Keywords: 550 - Earth sciences
    Language: English
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  • 62
    Publication Date: 2020-02-12
    Description: Multibeam bathymetry revealed the occurrence of numerous craterlike depressions, so-called pockmarks, on the sea floor of the Hammerfest Basin and the Loppa High, south-western Barents Sea. To investigate whether these pockmarks are related to ongoing gas seepage, microbial processes associated with methane metabolism were analyzed using geochemical, biogeochemical and microbiological techniques. Gravity cores were collected along transects crossing individual pockmarks, allowing a direct comparison between different locations inside (assumed activity center), on the rim, and outside of a pockmark (reference sites). Concentrations of hydrocarbons in the sediment, particularly methane, were measured as headspace (free) gas, and in the occluded and adsorbed gas fraction. Down to a depth of 2.6 m below sea floor (mbsf) sulfate reduction rates were quantified by radiotracer incubations. Concentrations of dissolved sulfate in the porewater were determined as well. Neither the sulfate profiles nor the gas measurements show any evidence of microbial activity or active fluid venting. Methane concentrations and sulfate reduction rates were extremely low or even below the detection limit. The results show that the observed sediment structures are most likely paleo-pockmarks, their formation probably occurred during the last deglaciation.
    Keywords: 550 - Earth sciences
    Language: English
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  • 63
    Publication Date: 2020-02-12
    Description: On 2001 May 7, following unintentional water injection, a moderate size induced earthquake struck the Ekofisk oil field, North Sea. Despite of its relatively moderate magnitude, clear low-frequency waveforms could be recorded up to more than 2000 km epicentral distance, suggesting a slow rupture at very shallow depth and wave propagation through low-velocity shallow structures. The event poses a rare opportunity to constrain rupture velocity, duration and rise time of a superficial M 〉 4 event occurring on a horizontal plane in soft, water-saturated sediments. Two previous studies discussed the earthquake point source finding vertical dip-slip focal mechanisms with opposite senses of P and T axes. A further investigation was thus required to provide a basis for a deeper discussion of the failure dynamics. We significantly improve the used data set, test different earth models and derive a point source as well as a kinematic rupture model. We carefully discuss parameter uncertainties and effects related to shallow sources and wave propagation through different crustal structures to resolve the previous controversy. We additionally provide a kinematic rupture model, based on apparent source times derived from Rayleigh and Love waves. The waveforms resolve a predominant unilateral rupture along a horizontal plane at about 2 km depth. We derive an unusually slow rupture, consequence of a slow rupture velocity of about 500 m s –1 and a long rise time of about 7 s. An independent modelling of GPS- based static displacements allows to confirm the focal mechanism polarity and to locate the centroid at the eastern side of the field, resulting in a much larger seismic moment in comparison with dynamic seismic moment. The rupture directivity is confirmed by the relative location of the centroid with respect to the epicentre, which is set at the site of water injection.
    Keywords: 550 - Earth sciences
    Language: English
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  • 64
    Publication Date: 2020-02-12
    Description: The Dead Sea Transform (DST) is a major left-lateral strike-slip fault that accommodates the relative motion between the African and Arabian plates, connecting a region of extension in the Red Sea to the Taurus collision zone in Turkey over a length of about 1100 km. The Dead Sea Basin (DSB) is one of the largest basins along the DST. The DSB is a morphotectonic depression along the DST, divided into a northern and a southern sub-basin, separated by the Lisan salt diapir. We report on a receiver function study of the crust within the multidisciplinary geophysical project, DEad Sea Integrated REsearch (DESIRE), to study the crustal structure of the DSB. A temporary seismic network was operated on both sides of the DSB between 2006 October and 2008 April. The aperture of the network is approximately 60 km in the E—W direction crossing the DSB on the Lisan peninsula and about 100 km in the N—S direction. Analysis of receiver functions from the DESIRE temporary network indicates that Moho depths vary between 30 and 38 km beneath the area. These Moho depth estimates are consistent with results of near-vertical incidence and wide-angle controlled-source techniques. Receiver functions reveal an additional discontinuity in the lower crust, but only in the DSB and west of it. This leads to the conclusion that the internal crustal structure east and west of the DSB is different at the present-day. However, if the 107 km left-lateral movement along the DST is taken into account, then the region beneath the DESIRE array where no lower crustal discontinuity is observed would have lain about 18 Ma ago immediately adjacent to the region under the previous DESERT array west of the DST where no lower crustal discontinuity is recognized.
    Keywords: 550 - Earth sciences
    Language: English
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  • 65
    Publication Date: 2020-02-12
    Description: The Van (Eastern Anatolia, Turkey) earthquake occurred on Sunday, October 23, 2011 with a moment magnitude of 7.2. The tectonics of this region is characterized by strike–slip faulting on the Bitlis Suture Zone, and thrusting in the Zagros fold and thrust belt. Using high-rate (1 second) GPS data from permanent GNSS stations from the CORS-TR network, co-seismic displacements of eleven stations were determined using precise point positioning during this earthquake. We used the time series of coordinate changes for fourteen CORS-TR stations, and calculated the crust movements before and after the earthquake. According to the PPP solutions computed using high frequency GPS data to determine the co-seismic motions of stations, we conclude for the Van earthquake an occurrence time of 10:41:22 (UTC). No pre-seismic horizontal movement of stations at the level more than 5 mm before the earthquake could be observed. That means that no kinematic warning or prediction before the earthquake exists. Along an east–west horizontal line north of the Van Sea with a length of about 100 km, the northern part of this line experienced extension of 0.2–1 ppm in a NW–SE direction. The southern part experienced N–S shortening of 0.5–1.5 ppm. The N–S shortening we estimated geodetically matches well with the N–S shortening and thrust focal mechanism derived independently using seismic data by the USGS. Co-seismic surface displacements derived from the GPS data are consistent with the teleseismic source model given by the USGS. The geodetic source model derived from the GPS data reproduces the same moment magnitude and centroid as the teleseismic model, but shows a higher spatial resolution of the slip distribution. We also analyzed the post-seismic surface displacements derived from the GPS data within the first two weeks after the mainshock. No reasonable slip distribution on the co-seismic fault plane could be found, indicating that the sources for the early post-seismic deformation might come from the widely scattered aftershocks.
    Keywords: 550 - Earth sciences
    Language: English
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  • 66
    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
    Language: English
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  • 67
    Publication Date: 2020-02-12
    Description: Rapid improvements in telemetry technology and the general decrease in communication costs have raised a growing interest in low-cost wireless sensing units. This is especially the case for structural monitoring purposes, where they are becoming a more valuable alternative to conventional wired monitoring system. The main advantages associated with the use of wireless sensing unit include a considerable decrease in installation costs, decentralization of data analysis, and the possibility of broadening the functional capabilities by exploiting the use, at the same time and place, of different sensors. In this work, the design of a low-cost wireless sensing unit able both to collect, analyze, store, and communicate data and estimated parameters is presented. The suitability of a network of these low-cost wireless instruments for monitoring the vibration characteristics and dynamic properties of strategic civil infrastructures is validated during a ambient vibration recording field test on the Fatih Sultan Mehmet Bridge in Istanbul, Turkey.
    Keywords: 550 - Earth sciences
    Language: English
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  • 68
    Publication Date: 2020-02-12
    Description: In 2004 and 2005 a passive seismic experiment was carried out in the northern and northeastern part of the Bohemian Massif (Sudetes) to study the lithospheric structure. We present results from Ps and Sp receiver function analyses. With one exception, Moho depth at stations in the northwestern part of the study area varies between 28 and 32 km. Thicker crust up to 35 km was mapped toward the south (Moldanubian unit) and toward the east (Moravo–Silesian and Brunovistulian units) confirming results from previous active seismic measurements. There exists a relatively sharp step in Moho depth between units of the central Sudetes (~ 30 km) and the Moravo–Silesian unit (~ 35 km). The vp/vs ratios inverted from primary and multiple Moho Ps conversions hint for different crustal compositions of the units. Toward the Carpathian thrust we have no clear indications for any crustal root or slab beneath the western Carpathians. However, our data suggests a deepening of the Moho or at least a complicated crust–mantle transition in this area. Additional Ps phases were observed between 6 and 10 s delay time in the Sudetes. These phases cannot be explained by Moho reverberations, but are most probably caused by low velocity zones in the middle crust or lithospheric mantle as shown by modeling of theoretical receiver functions. The stations showing these abnormal phases are located in the area of Permo-Carboniferous basins on probably Teplá–Barrandian crust. Therefore we assume that the phases hint at a mid-crustal low velocity zone between 16 and 20 km depth, which is interpreted as a felsic solidified magma reservoir of the Permo-Carboniferous volcanism beneath the Sudetic Basins. Sp receiver functions show phases with negative polarity at 9 to 12 s lead time on average, which we interpret as lithosphere–asthenosphere boundary at about 80 to 110 km depth.
    Keywords: 550 - Earth sciences
    Language: English
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  • 69
    Publication Date: 2020-02-12
    Description: We use local earthquake data observed by the amphibious, temporary seismic MERAMEX array to derive spatial variations of seismic attenuation (Qp) in the crust and upper mantle beneath Central Java. The path-averaged attenuation values (t∗) of a high quality subset of 84 local earthquakes were calculated by a spectral inversion technique. These 1929 t∗-values inverted by a least-squares tomographic inversion yield the 3D distribution of the specific attenuation (Qp). Analysis of the model resolution matrix and synthetic recovery tests were used to investigate the confidence of the Qp-model. We notice a prominent zone of increased attenuation beneath and north of the modern volcanic arc at depths down to 15 km. Most of this anomaly seems to be related to the Eocene–Miocene Kendeng Basin (mainly in the eastern part of the study area). Enhanced attenuation is also found in the upper crust in the direct vicinity of recent volcanoes pointing towards zones of partial melts, presence of fluids and increased temperatures in the middle to upper crust. The middle and lower crust seems not to be associated with strong heating and the presence of melts throughout the arc. Enhanced attenuation above the subducting slab beneath the marine forearc seems to be due to the presence of fluids.
    Keywords: 550 - Earth sciences
    Language: English
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  • 70
    facet.materialart.
    Unknown
    In:  25. Schmucker-Weidelt-Kolloquium für Elektromagnetische Tiefenforschung
    Publication Date: 2020-02-12
    Description: For a long time the root mean square (RMS) error has been used in the EM community: - to characterize data fit for a particular model; - as a criterion to compare several models obtained from inversion. The RMS error appears to be a natural choice since we usually tackle inverse problems in a least-squares sense. Over the years, RMS became a customary criterion and gained ultimate significance. However, on the hunt for low RMS values, one often needs to introduce subjectivity by arbitrarily adjusting error floors or masking “bad” data without referring to the assumptions behind RMS. In this contribution, we revisit basic assumptions behind RMS, demonstrate its deficiency and propose alternative ways, which may provide more insight into our data and allow a more comprehensive assessment of the quality of the modelling result/resistivity model.
    Keywords: 550 - Earth sciences
    Language: English
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  • 71
    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
    Language: English
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  • 72
    Publication Date: 2020-02-12
    Description: We analyse data from seismic stations surrounding the Alboran Sea between Spain and North Africa to constrain variations of the lithosphere–asthenosphere boundary (LAB) in the region. The technique used is the receiver function technique, which uses S-to-P converted teleseismic waves at the LAB below the seismic stations. We confirm previous data suggesting a shallow (60–90 km) LAB beneath the Iberian Peninsula and we observe a similarly shallow LAB beneath the Alboran Sea where the lithosphere becomes progressively thinner towards the east. A deeper LAB (90–100 km) is observed beneath the Betics, the south of Portugal and Morocco. The structure of the LAB in the entire region does not seem to show any indication of subduction related features. We also observe good P receiver function signals from the seismic discontinuities at 410 and 660 km depth which do not indicate any upper-mantle anomaly beneath the entire region. This is in agreement with the sparse seismic activity in the mantle transition zone suggesting the presence of only weak and regionally confined anomalies.
    Keywords: 550 - Earth sciences
    Language: English
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  • 73
    Publication Date: 2020-02-12
    Description: We determined a high-resolution 3-D S-wave velocity model for a 26 km × 12 km area in the northern part of the basin of Santiago de Chile. To reach this goal, we used microtremor recordings at 125 sites for deriving the horizontal-to-vertical (H/V) spectral ratios that we inverted to retrieve local S-wave velocity profiles. In the inversion procedure, we used additional geological and geophysical constraints and values of the thickness of the sedimentary cover already determined by gravimetric measurements, which were found to vary substantially over short distances in the investigated area. The resulting model was derived by interpolation with a kriging technique between the single S-wave velocity profiles and shows locally good agreement with the few existing velocity profile data, but allows the entire area, as well as deeper parts of the basin, to be represented in greater detail. The wealth of available data allowed us to check if any correlation between the S-wave velocity in the uppermost 30 m (v30S) and the slope of topography, a new technique recently proposed by Wald and Allen, exists on a local scale. We observed that while one lithology might provide a greater scatter in the velocity values for the investigated area, almost no correlation between topographic gradient and calculated v30S exists, whereas a better link is found between v30S and the local geology. Finally, we compared the v30S distribution with the MSK intensities for the 1985 Valparaiso event, pointing out that high intensities are found where the expected v30S values are low and over a thick sedimentary cover. Although this evidence cannot be generalized for all possible earthquakes, it indicates the influence of site effects modifying the ground motion when earthquakes occur well outside of the Santiago basin.
    Keywords: 550 - Earth sciences
    Language: English
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  • 74
    Publication Date: 2020-02-12
    Description: We implement the effects of gravitational self-attraction and loading (SAL) into a global baroclinic ocean circulation model and investigate effects on sea level patterns, ocean circulation, and density distributions. We compute SAL modifications as an additional force on the water masses at every time step by decomposing the field of ocean bottom pressure anomalies into spherical harmonic functions and then applying Love numbers to account for the elastic properties of the solid Earth. Considering SAL in the postprocessing turns out to be insufficient, especially in coastal waters and on subweekly time scales, where SAL modifies local sea level by around 0.6–0.8 cm on average; in the open ocean, changes mostly remain around 0.3 cm. Modifications of water velocities as well as of heat and salt distributions are modeled, yet they are small. Simple parameterizations of SAL effects currently used in a number of ocean circulation models suffer from the process's inhomogeneity in space and time. These parameterizations improve the modeled sea level patterns but fail to reproduce SAL impacts on circulation and density distributions. We therefore suggest to explicitly consider the full SAL effect in ocean circulation models, especially when investigating sea level variations faster than around 4 days.
    Keywords: 550 - Earth sciences
    Language: English
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  • 75
    Publication Date: 2020-02-12
    Description: Frequent landsliding is one of the greatest natural hazards facing the inhabitants of Central Asia's Fergana Basin and the surrounding mountain ranges. Active tectonics in the region is rapidly building the Tien Shan, one of the highest mountain ranges on Earth, and the extreme topographic relief promotes frequent landslide activity, which causes major losses of life and property. In southwestern Kyrgyzstan alone, on average 10 people die and seven houses are destroyed each year in these sudden and rapidly moving landslides.
    Keywords: 550 - Earth sciences
    Language: English
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  • 76
    Publication Date: 2020-02-12
    Description: A series of linked marine and land studies have recently targeted the Sumatra subduction zone, focusing on the 2004 and 2005 plate boundary earthquake ruptures in Indonesia. A collaborative research effort by scientists from the United Kingdom (UK Sumatra Consortium), Indonesia, United States, France, and Germany is focusing on imaging the crustal structure of the margin to examine controls on along-strike and updip earthquake rupture propagation. The fundamental science objective is to examine how margin architecture and properties control earthquake rupture location and propagation.
    Keywords: 550 - Earth sciences
    Language: English
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  • 77
    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
    Language: English
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  • 78
    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
    Language: English
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  • 79
    Publication Date: 2020-02-12
    Description: Structural features of volcanic and hydrothermal systems can be used to infer the location of magma chambers or productive geothermal areas. The Hengill volcanic triple-junction complex has a well-developed geothermal system, which is being exploited to extract hot fluids that are used for electrical power and heat production. In the framework of the I-GET project, a 4-month temporary seismological network including seven high-dynamic broadband instruments was deployed and 1D transient electromagnetic soundings (TEM) and 3D magnetotelluric (MT) surveys were performed to improve the understanding of the relationships between structural features, seismic activity and fluid production at the Hengill geothermal system. The MT and TEM data set are analysed elsewhere. The analysis of the seismological data set allowed the detection and classification of more than 600 earthquakes, among which long-period (LP) earthquakes were observed for the first time in this area. This work focuses first on a joint inversion for the 3D velocity structure and determination of the locations of the hypocentres from about 250 local volcano-tectonic earthquakes with clear P- and S-wave arrival times. The results confirm those from earlier tomography studies in this area. Integrating the seismic velocity and resistivity models in a semi-quantitative approach by cross-plotting the resistivity model with the velocity ratio VP/VS delineates a structural body with a high seismic velocity ratio and low resistivity that is interpreted as the main heat source of the geothermal system.
    Keywords: 550 - Earth sciences
    Language: English
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  • 80
    Publication Date: 2020-02-12
    Description: Ambient noise tomography is applied to the significant data resources now available across Tibet and surrounding regions to produce Rayleigh wave phase speed maps at periods between 6 and 50 s. Data resources include the permanent Federation of Digital Seismographic Networks, five temporary U.S. Program for Array Seismic Studies of the Continental Lithosphere (PASSCAL) experiments in and around Tibet, and Chinese provincial networks surrounding Tibet from 2003 to 2009, totaling ∼600 stations and ∼150,000 interstation paths. With such a heterogeneous data set, data quality control is of utmost importance. We apply conservative data quality control criteria to accept between ∼5000 and ∼45,000 measurements as a function of period, which produce a lateral resolution between 100 and 200 km across most of the Tibetan Plateau and adjacent regions to the east. Misfits to the accepted measurements among PASSCAL stations and among Chinese stations are similar, with a standard deviation of ∼1.7 s, which indicates that the final dispersion measurements from Chinese and PASSCAL stations are of similar quality. Phase velocities across the Tibetan Plateau are lower, on average, than those in the surrounding nonbasin regions. Phase velocities in northern Tibet are lower than those in southern Tibet, perhaps implying different spatial and temporal variations in the way the high elevations of the plateau are created and maintained. At short periods (〈20 s), very low phase velocities are imaged in the major basins, including the Tarim, Qaidam, Junggar, and Sichuan basins, and in the Ordos Block. At intermediate and long periods (〉20 s), very high velocities are imaged in the Tarim Basin, the Ordos Block, and the Sichuan Basin. These phase velocity dispersion maps provide information needed to construct a 3-D shear velocity model of the crust across the Tibetan Plateau and surrounding regions.
    Keywords: 550 - Earth sciences
    Language: English
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  • 81
    Publication Date: 2020-02-12
    Description: Amplitude ratio of 30 short-period conspicuous P5KP and PKPab phases from five intermediate depth or deep events in Fiji-Tonga recorded at European stations around 150° distance shows a mean value two to three times the ratio of the synthetic amplitudes obtained by the normal-mode theory (and ak135 model) or by full-wave theory (and PREM). There is a large variance in the results, also observed in five amplitude ratios from one event in Argentina observed at temporary stations in China around 156°. Global recordings of three major deep earthquakes in Fiji, Bonin, and Western Brazil observed at ASAR, WRA, and ZRNK arrays, at 59 North America stations and at six South Pole stations displayed conspicuous P4KP and PcP (or ScP) phases. The amplitude ratio values of P4KP vs P(S)cP are sometimes almost one order of magnitude larger than the corresponding values of the synthetics. In both cases, arrival times and slowness values (corrected for ellipticity and station elevation) at the distances up to 23° beyond the A cutoff point predicted by ray theory match both the synthetics, suggesting the observations are the AB branch of PmKP (m = 4, 5) around 1 Hz. In disagreement to ray theory, no reliable BC branch is observed neither on the recordings nor on the normal-mode synthetics. The high amplitude ratio values cannot be explained by realistic perturbations of the velocity or attenuation values of the global models in the proximity of the core-to-mantle boundary (CMB). We speculate that the focusing effects and/or strong scattering most likely associated to some anomalous velocity areas of the lowermost mantle are responsible for that. The results suggest limitations of the previous evaluations of the short-period attenuation in the outer core from PmKP amplitudes (m ≥ 3), irrespective of the fact that they are obtained by using ray theory, normal-mode or full-wave synthetics. Attempts to use PmKP arrival times in order to refine velocity structure in the proximity of CMB should be also regarded with care if the propagation times have been computed with ray theory.
    Keywords: 550 - Earth sciences
    Language: English
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  • 82
    Publication Date: 2020-02-12
    Description: The territory of Lithuania and adjacent areas of the East European Craton have always been considered a region of low seismicity. Two recent earthquakes with magnitudes of more than 5 in the Kaliningrad District (Russian Federation) on 21 September 2004 motivated re-evaluation of the seismic hazard in Lithuania and adjacent territories. A new opportunity to study seismicity in the region is provided by the PASSEQ (Pasive Seismic Experiment) project that aimed to study the lithosphere–asthenosphere structure around the Trans-European Suture Zone. Twenty-six seismic stations of the PASSEQ temporary seismic array were installed in the territory of Lithuania. The stations recorded a number of local and regional seismic events originating from Lithuania and adjacent areas. This data can be used to answer the question of whether there exist seismically active tectonic zones in Lithuania that could be potentially hazardous for critical industrial facilities. Therefore, the aim of this paper is to find any natural tectonic seismic events in Lithuania and to obtain more general view of seismicity in the region. In order to do this, we make a manual review of the continuous data recorded by the PASSEQ seismic stations in Lithuania. From the good quality data, we select and relocate 45 local seismic events using the well-known LocSAT and VELEST location algortithms. In order to discriminate between possible natural events, underwater explosions and on-shore blasts, we analyse spatial distribution of epicenters and temporal distribution of origin times and perform both visual analysis of waveforms and spectral analysis of recordings. We show that the relocated seismic events can be grouped into five clusters (groups) according to their epicenter coordinates and origin and that several seismic events might be of tectonic origin. We also show that several events from the off-shore region in the Baltic Sea (at the coasts of the Kaliningrad District of the Russian Federation) are non-volcanic tremors, although the origin of these tremor-type events is not clear.
    Keywords: 550 - Earth sciences
    Language: English
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  • 83
    Publication Date: 2020-02-12
    Description: We examine shear-wave splitting of SKS waveforms collected by a temporary array of 68 stations in the region of the Dead Sea basin. The observed splitting parameters exhibit systematic variations along a dense, EW-trending 60 km profile across the basin. The delay times vary significantly between 1.0 and 2.8 seconds with smaller values in the very center of the profile. The fast polarizations are oriented more-or-less parallel to the strike of the Dead Sea transform fault and vary between −10 and 20 degrees with respect to North. Finite-frequency waveform modeling reveals that the source-region of the small-scale lateral variations is likely located within the crust. The modeling further shows that purely isotropic velocity variations affect shear-wave splitting: To a large degree, the observed variations of splitting parameters can be explained by the sedimentary fill of the basin and its low isotropic seismic velocities, whereas the mantle is uniformly anisotropic. Our study indicates that precaution must be taken when interpreting short-scale lateral variations of shear wave splitting in terms of anisotropic structures in the crust or upper mantle.
    Keywords: 550 - Earth sciences
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  • 84
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    In:  Journal of Structural Chemistry
    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
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  • 85
    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
    Language: English
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  • 86
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    In:  Global Gravity Field and Its Temporal Variations | International Association of Geodesy Symposia
    Publication Date: 2020-02-12
    Description: In sequence of the GFZ93 high resolution gravity models (Gruber Th., et al, 1993) a new model, named GFZ95A, which is complete to degree and order 360 of a spherical harmonic series was computed. The model is based on new data sets, which were collected during the last months. This new data promises a major step towards a more precise high resolution gravity model. Especially from new available data over CIS (Community of Independent States) major progress can be expected with respect to the former models, which were based on predicted data in this area.
    Keywords: 550 - Earth sciences
    Language: English
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  • 87
    Publication Date: 2020-02-12
    Description: We performed a teleseismic P wave tomography study using seismic events at both teleseismic and regional distances, recorded by a temporary seismic array in the Argentine Puna Plateau and adjacent regions. The tomographic images show the presence of a number of positive and negative anomalies in a depth range of 20–300 km beneath the array. The most prominent of these anomalies corresponds to a low-velocity body, located in the crust, most clearly seen in the center of the array (27°S, 67°W) between the Cerro Peinado volcano, the Cerro Blanco caldera and the Farallon Negro in the east. This anomaly (southern Puna Magmatic Body) extends from the northern most part of the array and follows the line with the highest density of stations towards the south where it becomes smaller. It is flanked by high velocities on the west and the east respectively. On the west, the high velocities might be related to the subducted Nazca plate. On the northeast the high velocity block coincides with the position of the Hombre Muerto basin in the crust and could be indicating an area of lithospheric delamination where we detected a high velocity block at 100 km depth on the eastern border of the Puna plateau, north of Galan. This block might be related to a delamination event in an area with a thick crust of Paleozoic metamorphic rocks at the border between Puna and Eastern Cordillera. In the center of the array the Southern Puna magmatic body is also flanked by high velocities but the most prominent region is located on the east and is interpreted as part of the Sierras Pampeanas lithosphere with high velocities. The position of the Sierras Pampeanas geological province is key in this area as it appears to limit the extension of the plateau towards the south.
    Keywords: 550 - Earth sciences
    Language: English
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  • 88
    Publication Date: 2020-02-12
    Description: The transition between the lithosphere and the asthenosphere is subject to numerous contemporary studies as its nature is still poorly understood. The thickest lithosphere is associated with old cratons and platforms and it has been shown that seismic investigations may fail to image the lithosphere-asthenosphere boundary in these areas. Instead, several recent studies have proposed a mid-lithospheric discontinuity of unknown origin existing under several cratons. In this study we investigate the Tanzania craton in East Africa which is enclosed by the eastern and western branches of the East African Rift System. We present evidence from S receiver functions for two consecutive discontinuities at depths of 50–100 km and 140–200 km, which correspond to significant S wave velocity reductions under the Tanzania craton and the Albert and Edward rift segments. By comparison with synthetic waveforms we show that the lower discontinuity coincides with the LAB exhibiting velocity reductions of 6–9%. The shallower interface reveals a velocity drop that varies from 12% beneath the craton to 24% below the Albert-Edward rift. It is interpreted as an infiltration front marking the upper boundary of altered lithosphere due to ascending asthenospheric melts. This is corroborated by computing S velocity variations based on xenolith samples which exhibit a dense system of crystallized veins acting as pathways of the infiltrating melt. Mineral assemblages in these veins are rich in phlogopite and pyroxenite which can explain the reduced shear wave velocities. Melt infiltration represents a suitable mechanism to form a mid-lithospheric discontinuity within cratonic lithosphere that is underlain by anomalously hot mantle.
    Keywords: 550 - Earth sciences
    Language: English
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  • 89
    Publication Date: 2020-02-12
    Description: Clear S-to-P converted waves from the crust–mantle boundary (Moho) and lithosphere–asthenosphere boundary (LAB) have been observed on the eastern part of the Dead Sea Basin (DSB), and are used for the determination of the depth of the Moho and the LAB. A temporary network consisting of 18 seismic broad-band stations was operated in the DSB region as part of the DEad Sea Integrated REsearch project for 1.5 years beginning in September 2006. The obtained Moho depth (∼35 km) from S-to-P receiver functions agrees well with the results from P-to-S receiver functions and other geophysical data. The thickness of the lithosphere on the eastern part of the DSB is about 75 km. The results obtained here support and confirm previous studies, based on xenolith data, geodynamic modeling, heat flow observations, and S-to-P receiver functions. Therefore, the lithosphere on the eastern part of the DSB and along Wadi Araba has been thinned in the Late Cenozoic, following rifting and spreading of the Red Sea. The thinning of the lithosphere occurred without a concomitant change in the crustal thickness and thus an upwelling of the asthenosphere in the study area is invoked as the cause of the lithosphere thinning.
    Keywords: 550 - Earth sciences
    Language: English
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  • 90
    Publication Date: 2020-02-12
    Description: In the past decade the analysis of seismic noise has become an efficient tool to recover the Green's function between pairs of receivers by cross-correlation of seismic traces. Most studies focus on the investigation of the surface wave component of the ambient noise. Several attempts to recover the body wave part of the Green's function have been documented. In this paper I present the results of cross-correlation of seismic noise and the retrieval of refracted and reflected P-waves along a seismic line in the Karoo region (Republic of South Africa). Body wave refractions (direct phases) and reflections have been observed in the Green's functions derived from ambient noise records of up to 60 hours. The results are compared with shot gathers from a controlled source experiment (borehole explosions), carried out along the same line. The significant potential of ambient noise analysis, especially with respect to P-wave reflections will be shown and discussed.
    Keywords: 550 - Earth sciences
    Language: English
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  • 91
    Publication Date: 2020-02-12
    Description: The magnitude-8.8 Maule (Chile) earthquake of 27 February 2010 ruptured a segment of the Andean subduction zone megathrust that has been suspected to be of high seismic potential1,2,3,4,5,6. It is the largest earthquake to rupture a mature seismic gap in a subduction zone that has been monitored with a dense space-geodetic network before the event. This provides an image of the pre-seismically locked state of the plate interface of unprecedentedly high resolution, allowing for an assessment of the spatial correlation of interseismic locking with coseismic slip. Pre-seismic locking might be used to anticipate future ruptures in many seismic gaps6,7,8,9,10,11,12, given the fundamental assumption that locking and slip are similar. This hypothesis, however, could not be tested without the occurrence of the first gap-filling earthquake. Here we show evidence that the 2010 Maule earthquake slip distribution correlates closely with the patchwork of interseismic locking distribution as derived by inversion of global positioning system (GPS) observations during the previous decade. The earthquake nucleated in a region of high locking gradient and released most of the stresses accumulated in the area since the last major event in 1835. Two regions of high seismic slip (asperities) appeared to be nearly fully locked before the earthquake. Between these asperities, the rupture bridged a zone that was creeping interseismically with consistently low coseismic slip. The rupture stopped in areas that were highly locked before the earthquake but where pre-stress had been significantly reduced by overlapping twentieth-century earthquakes. Our work suggests that coseismic slip heterogeneity at the scale of single asperities should indicate the seismic potential of future great earthquakes, which thus might be anticipated by geodetic observations.
    Keywords: 550 - Earth sciences
    Language: English
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  • 92
    Publication Date: 2020-02-12
    Description: Local earthquake data from a dense temporary seismological network in the southern Dead Sea area have been analysed within the project DESIRE (Dead Sea Integrated Research Project). Local earthquakes are used for the first precise image of the distribution of the P-wave velocity and the vP/vS ratios. 65 stations registered 655 local events within 18 months of observation time. A subset of 530 well-locatable events with 26 730 P- and S-arrival times was used to calculate a tomographic model for the vP and vP/vS distribution. Since the study area is at first-order 2-D, a gradual approach was chosen, which compromised a 2-D inversion followed by a 3-D inversion. The sedimentary basin fill is clearly imaged through high vP/vS ratios and low vP. The basin fill shows an asymmetric structure with average depth of 7 km at the western boundary and depth between 10 and 14 km at the eastern boundary. This asymmetry is reflected by the vertical strike-slip eastern border fault, and the normal faulting at the western boundary, caused by the transtensional deformation within the last 5 Myr. Within the basin fill the Lisan salt diapir is imaged through low vP/vS ratios, reflecting its low fluid content. The extensions were determined to 12 km in E–W and 17 km in N–S direction while its depth is 5–6 km. The thickness of the pre-basin sediments below the basin fill cannot be derived from the tomography data—it is estimated to less than 3 km from former investigations. Below the basin, down to 18 km depth very low P-wave velocities and low vP/vS ratios are observed—most likely caused by fluids from the surrounding crust or the upper mantle.
    Keywords: 550 - Earth sciences
    Language: English
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  • 93
    Publication Date: 2020-02-12
    Description: For the first time, ambient noise tomography is used to clearly image the magma chamber beneath Lake Toba caldera, one of the largest Quaternary calderas on Earth. Using data from 40 seismic stations deployed between May and October 2008 around Lake Toba, empirical Green's functions are extracted from long term cross-correlations of continuous records. These functions are dominated by Rayleigh waves, whose group velocities can be measured in the period range from 2.5 to 12 seconds. Arrival times of these waves are picked for a given period and inverted using 2-D tomography to calculate lateral variations in velocity for the given period. This was done for six different periods, which all correspond to different sampling depths. Thus the six 2-D models presented together provide information on velocity variations with depth. The results show a low-velocity body coincident with the Lake Toba caldera, representing the magma chamber under the volcano. The chamber is observed to have a complex 3-D geometry, with at least two separate sub-chambers underlying the caldera. Other results include a deep low velocity body, possibly another magma chamber, south west of the lake with an upper limit of ∼7 km depth. The maximum depth to which this body reaches could not be resolved. The Sumatra Fault marks a velocity contrast, but only down to depths not greater than 5 km. The reliability of the results was further confirmed by checkerboard recovery tests.
    Keywords: 550 - Earth sciences
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  • 94
    Publication Date: 2020-02-12
    Description: During the TOR-1 passive seismic experiment in 1996/97, a maximum of 139 temporary seismograph stations were operating over the Sorgenfrei-Tornquist Zone (STZ) in an area extending from northern Germany through Denmark to central Sweden. One of the objectives was to study horizontal anisotropy directions in the subcrustal lithosphere and asthenosphere across the Trans-European Suture Zone. To achieve this goal,broad-band and intermediate-period (5 s) data of the TOR-1 stations and additional stations of permanent networks (GRSN, GEOFON) were analysed for splitting of SKS and SKKS phases. As a result of the relatively dense station spacing, the method offers good lateral resolution of anisotropy.Preliminary results suggest that the directions of the fast horizontal S wave velocity are affected by the STZ. In central Europe and southern Sweden, far away from the STZ, fast S wave directions are approximately E-W while they turn more northerly closer to the STZ where they are approximately parallel to the trend of the STZ. No significant shear wave splitting was observed north of 57 degr. N and east of 14 degr. E. Small delay times between 0.2 and 0.5 s observed at the northernmost TOR-1 station T40S and T60S may be controlled by anisotropy in a thickened crust. The mantle contribution of horizontal anisotropy within the STZ is probably constrained to an approximately 60-km-thick zone in the depth range between 70 and 300 km. The observations are consistent with a model where azimuthally anisotropy is not governed by present-day mantle flow in the asthenosphere, but rather is frozen into the subcrustal lithosphere during the last episode of tectonic activity.
    Keywords: 550 - Earth sciences
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  • 95
    Publication Date: 2020-02-12
    Description: We investigate microseismic activity at the convergent plate boundary of the Hellenic subduction zone on- and offshore south-eastern Crete with unprecedented precision using recordings from an amphibian seismic network. The network configuration consisted of up to eight ocean bottom seismometers as well as five temporary short-period and six permanent broadband stations on Crete and surrounding islands. More than 2,500 local and regional events with magnitudes up to M L = 4.5 were recorded during the time period July 2003–June 2004. The magnitude of completeness varies between 1.5 on Crete and adjacent areas and increases to 2.5 in the vicinity of the Strabo trench 100 km south of Crete. Tests with different localization schemes and velocity models showed that the best results were obtained from a probabilistic earthquake localization using a 1-D velocity model and corresponding station corrections obtained by simultaneous inversion. Most of the seismic activity is located offshore of central and eastern Crete and interpreted to be associated with the intracrustal graben system (Ptolemy and Pliny trenches). Furthermore, a significant portion of events represents interplate seismicity along the NNE-ward dipping plate interface. The concentration of seismicity along the Ptolemy and Pliny trenches extends from shallow depths down to the plate interface and indicates active movement. We propose that both trenches form transtensional structures within the Aegean plate. The Aegean continental crust between these two trenches is interpreted as a forearc sliver as it exhibits only low microseismic activity during the observation period and little or no internal deformation. Interplate seismicity between the Aegean and African plates forms a 100-km wide zone along dip from the Strabo trench in the south to the southern shore-line of Crete in the north. The seismicity at the plate contact is randomly distributed and no indications for locked zones were observed. The plate contact below and north of Crete shows no microseismic activity and seems to be decoupled. The crustal seismicity of the Aegean plate in this area is generally confined to the upper 20 km in agreement with the idea of a ductile deformation of the lower crust caused by a rapid return flow of metamorphic rocks that spread out below the forearc. In the region of the Messara half-graben at the south coast of central Crete, a southward dipping seismogenic structure is found that coalesces with the seismicity of the Ptolemy trench at a depth of about 20 km. The accretionary prism south of Crete indicated by the Mediterranean Ridge showed no seismic activity during the observation period and seems to be deforming aseismically.
    Keywords: 550 - Earth sciences
    Language: English
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  • 96
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    In:  Natural Hazards and Earth System Sciences (NHESS)
    Publication Date: 2020-02-12
    Keywords: 550 - Earth sciences
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  • 97
    Publication Date: 2020-02-12
    Description: We present a series of 1-D shear velocity models for the Sumatran Forearc and Arc derived from Rayleigh wave group dispersion in noise correlation functions from vertical and pressure records from an onshore–offshore seismic deployment. The 1-D models represent the crustal structure of the downgoing Indian Plate, the accretionary prism and the arc. There is a progression in shear velocity across the forearc to the arc associated with thickening of the accretionary prism and the development of an arc crust. The velocity structure inferred for the upper 20 km based on path averages between stations on the accretionary prism has velocities consistent with a thick sediment package in agreement with estimates of depth to the plate boundary determined from active source experiments. We also find low Indian Plate shear velocities, 〈4 km s−1 to 25 km depth beneath our station locations on the downgoing plate. These low seismic velocities are consistent with at least 14–24 per cent serpentinization of the oceanic crust and upper mantle of the downgoing plate. This high degree of serpentinization, may weaken the plate interface and explain the segmentation observed in the great Sumatran thrust earthquakes if the serpentinization is localized. The success of this study suggests that future onshore–offshore seismic deployments will be able to utilize this method.
    Keywords: 550 - Earth sciences
    Language: English
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  • 98
    Publication Date: 2020-02-12
    Description: The Mw = 9.3 Sumatra earthquake of 26 December 2004 generated a tsunami that affected the entire Indian Ocean region and caused approximately 230 000 fatalities. In the response to this tragedy the German government funded the German Indonesian Tsunami Early Warning System (GITEWS) Project. The task of the GEOFON group of GFZ Potsdam was to develop and implement the seismological component. In this paper we describe the concept of the GITEWS earthquake monitoring system and report on its present status. The major challenge for earthquake monitoring within a tsunami warning system is to deliver rapid information about location, depth, size and possibly other source parameters. This is particularly true for coast lines adjacent to the potential source areas such as the Sunda trench where these parameters are required within a few minutes after the event in order to be able to warn the population before the potential tsunami hits the neighbouring coastal areas. Therefore, the key for a seismic monitoring system with short warning times adequate for Indonesia is a dense real-time seismic network across Indonesia with densifications close to the Sunda trench. A substantial number of supplementary stations in other Indian Ocean rim countries are added to strengthen the teleseismic monitoring capabilities. The installation of the new GITEWS seismic network – consisting of 31 combined broadband and strong motion stations – out of these 21 stations in Indonesia – is almost completed. The real-time data collection is using a private VSAT communication system with hubs in Jakarta and Vienna. In addition, all available seismic real-time data from the other seismic networks in Indonesia and other Indian Ocean rim countries are acquired also directly by VSAT or by Internet at the Indonesian Tsunami Warning Centre in Jakarta and the resulting "virtual" network of more than 230 stations can jointly be used for seismic data processing. The seismological processing software as part of the GITEWS tsunami control centre is an enhanced version of the widely used SeisComP software and the well established GEOFON earthquake information system operated at GFZ in Potsdam (http://geofon.gfz-potsdam.de/db/eqinfo.php). This recently developed software package (SeisComP3) is reliable, fast and can provide fully automatic earthquake location and magnitude estimates. It uses innovative visualization tools, offers the possibility for manual correction and re-calculation, flexible configuration, support for distributed processing and data and parameter exchange with external monitoring systems. SeisComP3 is not only used for tsunami warning in Indonesia but also in most other Tsunami Warning Centres in the Indian Ocean and Euro-Med regions and in many seismic services worldwide.
    Keywords: 550 - Earth sciences
    Language: English
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  • 99
    Publication Date: 2020-02-12
    Description: We analyse broad-band SS waveformdata recorded by several networks in Europe with sources mainly in the west Pacific to study the underside reflections of teleseismic SS waves in the lithosphere and the upper mantle beneath eastern Asia and the NW Pacific ocean. SS bounce points sample a corridor from the Aleutian, Kamchatka and Japan subduction zones through the North China Craton and Central Asian Orogenic Belt to the Tibetan plateau. The corridor passes through different tectonic units such as subduction zones, an old continental shield, a fold belt and a high plateau. We investigate the seismic structure of the lithosphere and the mantle transition zone beneath the different geotectonic units along the profile and infer the correlation of geodynamic processes at different depths.We explore the short period frequency content in the SS waveform data and use moveout correction and common midpoint stack to acquire profiles with high lateral and depth resolution from the crust to the mantle transition zone. Clear SS precursors of the 410 and 660 km discontinuities show the effects of the interaction between the subducted oceanic lithosphere and the mantle transition zone beneath the NW Pacific subduction zones. A low-velocity layer has also been detected beneath the 410 km discontinuity and can be traced along the entire profile. Due to the improved resolution acquired by the method presented here we have been able to study the shallower structures such as the Moho and the lithosphere–asthenosphere boundary by SS precursors. The continental Moho can be clearly seen along this corridor. The depth variation agrees well with earlier receiver function results. We also see negative reflectors along the profile at varying depths, which can be interpreted as the lithosphere–asthenosphere boundary.
    Keywords: 550 - Earth sciences
    Language: English
    Type: info:eu-repo/semantics/article
    Format: application/pdf
    Format: application/pdf
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  • 100
    Publication Date: 2020-02-12
    Description: Earthquake early warning systems should provide reliable warnings as quickly as possible with a minimum number of false and missed alarms. Wireless meshed networks, coupled with low-cost seismometers for monitoring, evaluation, and information about seismic vibrations in space and time are introducing a new generation of warning infrastructures for mega-cities. The use of a cooperative method for signal analysis makes it possible to distinguish earthquakes (with a certain minimal magnitude) from other ground shaking in a city. The paper gives a short overview of our approach for developing decentralized early warning systems and an evaluation based on experiences gained from model investigations, testbeds in Berlin, and prototype installations in Istanbul.
    Keywords: 550 - Earth sciences
    Language: English
    Type: info:eu-repo/semantics/article
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