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  • Bücher  (18)
  • Lausanne : Frontiers  (18)
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  • 1
    Schlagwort(e): sea level rise ; Climate Change ; coastal flooding ; Extreme sea levels ; storm surge ; Tides ; Coastal morphology ; Meteotsunamis ; Tide gauges ; satellite altimetry
    Beschreibung / Inhaltsverzeichnis: There is observational evidence that global mean sea levels are rising and there is concern that the rate of rise will accelerate throughout the 21st century, significantly threatening growing coastal communities. Modern society is vulnerable to even small changes in sea level. More than 600 million people currently live within 10 m of present-day sea level, in an area that generates 10% of the world’s total GDP. An assessment of 136 of the world’s largest port cities estimated that, by the 2070s, the population exposed to flooding risk may grow by more than a factor of three in these cities due to the combined effects of sea level rise, land subsidence, population growth and urbanization, with asset exposure increasing to more than ten times current levels. Therefore, understanding future sea level rise and variability is of utmost importance. In June 2015 we are holding a workshop in Majorca, Spain with a focus on sea level variability and change (see https://slrmallorca.wordpress.com for more details). Over 100 sea level experts from around the world will attend this workshop, from a range of different disciplines. We would like to propose a Research Topic, based on the papers presented at this workshop. The main aims of the workshop are to: 1.) Evaluate the current state-of-knowledge of sea level science; 2.) Identify gaps and unresolved questions in any aspect of sea level science; and 3.) Design future research to address these issue. The workshop will provide a forum for the discussion and the exchange of ideas on key sea level issues, and foster collaboration across the wide range of disciplines involved in sea level research. All aspects of sea level changes will be covered, from global to regional, observations and modelling, processes driving mean sea level changes and extremes, from the geological scale to the instrumental era and future projections and including impacts on the coastal zones.
    Seiten: Online-Ressource (174 Seiten)
    ISBN: 9782889451500
    Sprache: Englisch
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Schlagwort(e): global warming ; flooding ; floods ; plants
    Beschreibung / Inhaltsverzeichnis: Global warming has dramatically increased the frequency and severity of flooding events worldwide. As a result, many man-made and natural ecosystems have become flood-prone. For plants, the main consequence of flooding is the drastic reduction of oxygen availability that restricts respiratory energy production and finally affects survival. Flooding can negatively influence crop production and wild plant distributions, since most plants are sensitive to excessively wet conditions. However, plants have evolved a broad spectrum of adaptive responses to oxygen deficiency that eventually leads to tolerance. Many of these morphological and physiological adaptations have been described in some crops and wild plant species and considerable progress has been made in understanding the molecular aspects governing tolerance traits. Moreover, the molecular mechanism of plant oxygen sensing has been recently elucidated. However, many other aspects concerning plant acclimation responses to flooding remain unanswered. With this research topic we seek to build an online collection of articles addressing various aspects relating to “plant responses to flooding’’ which will reflect the exciting new developments and current state of the art in this vibrant and dynamic research field. All kinds of articles, including original research articles, short reviews, methods and opinions are welcome, in the attempt to broadly and freely disseminate research information, tools and protocols.
    Seiten: Online-Ressource (142 Seiten)
    ISBN: 9782889193042
    Sprache: Englisch
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Unbekannt
    Lausanne : Frontiers
    Schlagwort(e): microbial ecology ; biogeochemistry ; stoichiometry ; Climate Change ; soil microbiology ; elemental fluxes ; Respiration ; aquatic microbiology ; microbiology
    Beschreibung / Inhaltsverzeichnis: Advances in next generation sequencing technologies, omics, and bioinformatics are revealing a tremendous and unsuspected diversity of microbes, both at a compositional and functional level. Moreover, the expansion of ecological concepts into microbial ecology has greatly advanced our comprehension of the role microbes play in the functioning of ecosystems across a wide range of biomes. Super-imposed on this new information about microbes, their functions and how they are organized, environmental gradients are changing rapidly, largely driven by direct and indirect human activities. In the context of global change, understanding the mechanisms that shape microbial communities is pivotal to predict microbial responses to novel selective forces and their implications at the local as well as global scale. One of the main features of microbial communities is their ability to react to changes in the environment. Thus, many studies have reported changes in the performance and composition of communities along environmental gradients. However, the mechanisms underlying these responses remain unclear. It is assumed that the response of microbes to changes in the environment is mediated by a complex combination of shifts in the physiological properties, single-cell activities, or composition of communities: it may occur by means of physiological adjustments of the taxa present in a community or selecting towards more tolerant/better adapted phylotypes. Knowing whether certain factors trigger one, many, or all mechanisms would greatly increase confidence in predictions of future microbial composition and processes. This Research Topic brings together studies that applied the latest molecular techniques for studying microbial composition and functioning and integrated ecological, biogeochemical and/or modeling approaches to provide a comprehensive and mechanistic perspective of the responses of micro-organisms to environmental changes. This Research Topic presents new findings on environmental parameters influencing microbial communities, the type and magnitude of response and differences in the response among microbial groups, and which collectively deepen our current understanding and knowledge of the underlying mechanisms of microbial structural and functional responses to environmental changes and gradients in both aquatic and terrestrial ecosystems. The body of work has, furthermore, identified many challenges and questions that yet remain to be addressed and new perspectives to follow up on.
    Seiten: Online-Ressource (263 Seiten)
    ISBN: 9782889197231
    Sprache: Englisch
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Schlagwort(e): hydrocarbon ; Oil reservoir ; corrosion ; Enhanced Oil Recovery ; methanogenesis ; biosurfactants ; Biodesulfurization ; Energy ; petroleum biotechnology ; Biodegradation
    Beschreibung / Inhaltsverzeichnis: Petroleum hydrocarbons are both a product of, and rich substrate for, microorganisms from across all Domains of life. Rooted deeply in the history of microbiology, hydrocarbons have been studied as sources of carbon and energy for microorganisms for over a century. As global demand for petroleum and its refined products continues to rise, so do challenges associated with environmental pollution, oil well souring, infrastructure corrosion, oil recovery, transport, refining, and upgrading of heavy crude oils and bitumens. Advances in genomics, synthetic biology and metabolic engineering has invigorated interest in petroleum microbial biotechnology as interest grows in technologies for in situ methane production, biodesulfurization and biodenitrogenation, bio-upgrading of heavy crudes, microbial enhanced oil recovery, corrosion control, and biocatalysts for generating value-added products. Given the complexity of the global petroleum industry and the harsh conditions in which it operates, a deeper understanding of the ecophysiology of aerobic and anaerobic microbial communities that have associations with petroleum hydrocarbons is needed if robust technologies are to be deployed successfully. This research topic highlights recent advances in microbial enhanced oil recovery, methanogenic hydrocarbon metabolism and carbon dioxide sequestration, bioremediation, microbiologically influenced corrosion, biodesulfurization, and the application of metagenomics to better understand microbial communities associated with petroleum hydrocarbons.
    Seiten: Online-Ressource (234 Seiten)
    ISBN: 9782889452569
    Sprache: Englisch
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Schlagwort(e): Extreme climate events ; Tree response ; wood functional traits ; Ecophysiology ; Genetic plasticity ; Manipulation experiments ; mechanistic modeling ; forest management
    Beschreibung / Inhaltsverzeichnis: Trees are among the longest-living organisms. They are sensitive to extreme climatic events and document the effects of environmental changes in form of structural modifications of their tissues. These modifications represent an integrated signal of complex biological responses enforced by the environment. For example, temporal change in stem increment integrates multiple information of tree performance, and wood anatomical traits may be altered by climatic extremes or environmental stress. Recent developments in preparative tools and computational image analysis enable to quantify changes in wood anatomical features, like vessel density or vessel size. Thus, impacts on their functioning can be related to climatic forcing factors. Similarly, new developments in monitoring (cambial) phenology and mechanistic modelling are enlightening the interrelationships between environmental factors, wood formation and tree performance and mortality. Quantitative wood anatomy is a reliable indicator of drought occurrence during the growing season, and therefore has been studied intensively in recent years. The variability in wood anatomy not only alters the biological and hydraulic functioning of a tree, but may also influence the technological properties of wood, with substantial impacts in forestry. On a larger scale, alterations of sapwood and phloem area and their ratios to other functional traits provide measures to detect changes in a tree’s life functions, and increasing risk of drought-induced mortality with possible impacts on hydrological processes and species composition of plant communities. Genetic variability within and across populations is assumed to be crucial for species survival in an unpredictable future world. The magnitude of genetic variation and heritability of adaptive traits might define the ability to adapt to climate change. Is there a relation between genetic variability and resilience to climate change? Is it possible to link genetic expression and climate change to obtain deeper knowledge of functional genetics? To derive precise estimates of genetic determinism it is important to define adaptive traits in wood properties and on a whole-tree scale. Understanding the mechanisms ruling these processes is fundamental to assess the impact of extreme climate events on forest ecosystems, and to provide realistic scenarios of tree responses to changing climates. Wood is also a major carbon sink with a long-term residence, impacting the global carbon cycle. How well do we understand the link between wood growth dynamics, wood carbon allocation and the global carbon cycle? Papers contribution to this Research Topic will cover a wide range of ecosystems. However, special relevance will be given to Mediterranean-type areas. These involve coastal regions of four continents, making Mediterranean-type ecosystems extremely interesting for investigating the potential impacts of global change on growth and for studying responses of woody plants under extreme environmental conditions. For example, the ongoing trend towards warmer temperatures and reduced precipitation can increase the susceptibility to fire and pests. The EU-funded COST Action STREeSS (Studying Tree Responses to extreme Events: a SynthesiS) addresses such crucial tree biological and forest ecological issues by providing a collection of important methodological and scientific insights, about the current state of knowledge, and by opinions for future research needs.
    Seiten: Online-Ressource (466 Seiten)
    ISBN: 9782889451920
    Sprache: Englisch
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Schlagwort(e): Earthquake Response ; resilience ; Building ; base isolation ; structural control ; impulse ; Earthquake ground motion ; energy balance ; robustness ; Seismic resistance
    Beschreibung / Inhaltsverzeichnis: This eBook is the third in a series of books on the critical earthquake response of elastic or elastic-plastic structures under near-fault or long-duration ground motions, and includes four original research papers which were published in the specialty section Earthquake Engineering in ‘Frontiers in Built Environment’. Several extensions of the first eBook and the second eBook are included here. The first article is on the earthquake resilience of residential houses after repeated ground motions with high intensity. The 2016 Kumamoto earthquake brought a significant impact on the earthquake resilience of residential houses under repeated ground motions with high intensity in a few days. The necessary strength upgrade withstanding two repeated high-intensity ground motions was found to be 1.5. The second article is concerned with the smart enhancement of earthquake resilience of building structures under both near-fault and long-duration ground motions. A hybrid system of base-isolation and building connection control was proposed and its earthquake resilience to near-fault and long-duration ground motions was evaluated by a double impulse and a multiple impulse. It was demonstrated that the base-isolation is effective for near-fault ground motions and the building connection system using passive dampers is effective for long-duration ground motions. The third article is related to the robustness evaluation of elastic-plastic base-isolated high-rise buildings under resonant near-fault ground motions. The robustness function was introduced to evaluate quantitatively the robustness of elastic-plastic base-isolated high-rise buildings. The fourth article is an extension of the previously proposed energy balance approach to a bilinear elastic-plastic single-degree-of-freedom system under a long-duration sinusoidal ground motion. A historical difficulty in nonlinear vibration posed by Caughey (1960) and Iwan (1961) has been overcome in a smart manner after half a century. The approach presented in this eBook, together with the previous eBooks, is an epoch-making accomplishment to open the door for simpler and deeper understanding of structural reliability and resilience of built environments in the elastic-plastic and nonlinear range.
    Seiten: Online-Ressource (61 Seiten)
    ISBN: 9782889452705
    Sprache: Englisch
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Unbekannt
    Lausanne : Frontiers
    Schlagwort(e): Volcanology ; Volcanic Eruptions ; stress field ; Eruption dynamics ; Eruption triggering
    Beschreibung / Inhaltsverzeichnis: Increasing evidence supports the claim that stress changes play a fundamental role in triggering volcanic eruptions. Stress changes may vary in origin to include earthquakes, erosion and landslide processes, deglaciation, or tidal effects. The local stress can also change as response of magma influx from deeper reservoirs and an increase of the magma/gas pressure. The stress transfer may be of great importance in reawakening a dormant system. As an example, significant statistical correlation of large earthquakes and eruptions in time and space was suggested in many works. The interaction may be two-fold; where magma intrusions may change the stress at active faults and trigger earthquakes, while tectonic earthquakes may affect the magmatic system and change the eruption activity. The change in local tectonic stress has been claimed as trigger of large ignimbrite eruptions or for controlling the eruptive style of explosive eruptions. Sometimes volcano systems that are nested or closely located may become active in chorus; neighbouring volcanoes may interact in the sense that one volcano triggers its neighbouring volcano. However, although there is ample evidence of concurrence, the processes of interacting volcanoes and near- to far-field tectonic stress are not well understood. Some studies suggest that volcanic eruptions are triggered if compressive stress acts at the magma system and “squeezes” out magma. Other studies suggest that extensional stress fields facilitate magma rise and thus encourage eruptions, or that fluctuating compression and extension during the passing of seismic waves trigger eruptions. This research topic tries to address some of the important open questions in interaction between stress field and volcanic eruption, though both review papers and new contributions.
    Seiten: Online-Ressource (131 Seiten)
    ISBN: 9782889452774
    Sprache: Englisch
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Schlagwort(e): carbon ; CO2
    Beschreibung / Inhaltsverzeichnis: 06 Editorial: Deep Carbon in Earth: Early Career Scientist Contributions to the Deep Carbon Observatory / Donato Giovannelli, Benjamin A. Black, Alysia D. Cox and Cody S. Sheik --- Carbon Degassing at Volcanoes --- 08 Relationship between Diffuse CO2 Degassing and Volcanic Activity. Case Study of the Poás, Irazú, and Turrialba Volcanoes, Costa Rica / Matthieu Epiard, Geoffroy Avard, J. Maarten de Moor, María Martínez Cruz, Gustav Barrantes Castillo and Henriette Bakkar --- 22 Soil CO2 Degassing Path along Volcano-Tectonic Structures in the Pico-Faial-São Jorge Islands (Azores Archipelago, Portugal) / Fátima Viveiros, Márcio Marcos, Carlos Faria, João L. Gaspar, Teresa Ferreira and Catarina Silva --- The Deep Earth --- 40 Transformations and Decomposition of MnCO3 at Earth’s Lower Mantle Conditions / Eglantine Boulard, Yijin Liu, Ai L. Koh, Mary M. Reagan, Julien Stodolna, Guillaume Morard, Mohamed Mezouar and Wendy L. Mao --- 49 Structure and Dynamics of Confined C-O-H Fluids Relevant to the Subsurface: Application of Magnetic Resonance, Neutron Scattering, and Molecular Dynamics Simulations / Siddharth S. Gautam, Salim Ok and David R. Cole --- 68 An Experimental Study of the Carbonation of Serpentinite and Partially Serpentinised Peridotites / Alicja M. Lacinska, Michael T. Styles, Keith Bateman, Matthew Hall and Paul D. Brown --- Activity of Subsurface Communities --- 88 Improved Measurement of Extracellular Enzymatic Activities in Subsurface Sediments Using Competitive Desorption Treatment / Adrienne Hoarfrost, Rachel Snider and Carol Arnosti --- 99 Microbial Sulfide Filter along a Benthic Redox Gradient in the Eastern Gotland Basin, Baltic Sea / Mustafa Yücel, Stefan Sommer, Andrew W. Dale and Olaf Pfannkuche --- 115 Electron Transfer between Electrically Conductive Minerals and Quinones / Olga Taran --- 128 Reactivation of Deep Subsurface Microbial Community in Response to Methane or Methanol Amendment / Pauliina Rajala and Malin Bomberg --- 141 Response of Deep Subsurface Microbial Community to Different Carbon Sources and Electron Acceptors during ~2 months Incubation in Microcosms / Lotta Purkamo, Malin Bomberg, Mari Nyyssönen, Lasse Ahonen, Ilmo Kukkonen and Merja Itävaara --- 155 Guar Gum Stimulates Biogenic Sulfide Production at Elevated Pressures: Implications for Shale Gas Extraction / Sophie L. Nixon, Leanne Walker, Matthew D. T. Streets, Bob Eden, Christopher Boothman, Kevin G. Taylor and Jonathan R. Lloyd --- Serpentinization and the Carbon Cycle --- 166 Serpentinization-Influenced Groundwater Harbors Extremely Low Diversity Microbial Communities Adapted to High pH / Katrina I. Twing, William J. Brazelton, Michael D. Y. Kubo, Alex J. Hyer, Dawn Cardace, Tori M. Hoehler, Tom M. McCollom and Matthew O. Schrenk --- 182 Methane Dynamics in a Tropical Serpentinizing Environment: The Santa Elena Ophiolite, Costa Rica / Melitza Crespo-Medina, Katrina I. Twing, Ricardo Sánchez-Murillo, William J. Brazelton, Thomas M. McCollom and Matthew O. Schrenk --- Carbon Through Space and Time --- 196 Evaluating the Role of Seagrass in Cenozoic CO2 Variations / Marco Brandano, Marco Cuffaro, Giovanni Gaglianone, Patrizio Petricca, Vincenzo Stagno and Guillem Mateu-Vicens --- 205 The Hyperarid Core of the Atacama Desert, an Extremely Dry and Carbon Deprived Habitat of Potential Interest for the Field of Carbon Science / Armando Azua-Bustos, Carlos González-Silva and Gino Corsini --- Building a Carbon Network --- 211 Weaving a Knowledge Network for Deep Carbon Science / Xiaogang Ma, Patrick West, Stephan Zednik, John Erickson, Ahmed Eleish, Yu Chen, Han Wang, Hao Zhong and Peter Fox
    Seiten: Online-Ressource (221 Seiten)
    ISBN: 9782889453634
    Sprache: Englisch
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Schlagwort(e): Cold air pools ; Downslope winds ; Horizontal inhomogeneity ; Hydraulic jumps ; Large eddy simulation ; mountain waves ; orographic precipitation ; Sub-mesoscale circulations ; Thermally-driven flows ; Turbulent fluxes
    Beschreibung / Inhaltsverzeichnis: 05 Editorial: The Atmosphere over Mountainous Regions / Miguel A. C. Teixeira, Daniel J. Kirshbaum, Haraldur Ólafsson, Peter F. Sheridan and Ivana Stiperski --- 07 Possible observation of horizontal roll vortices over the Adriatic Sea during bora / Danijel Belušić, Željko Večenaj and Margaret A. LeMone --- 14 Lee Waves on the Boundary-Layer Inversion and Their Dependence on Free-Atmospheric Stability / Johannes Sachsperger, Stefano Serafin and Vanda Grubišic’ --- 25 Non-linear Topographic Effects in Two-Layer Flows / Peter G. Baines and Edward R. Johnson --- 35 The Quasi-Steady State of the Valley Wind System / Juerg Schmidli and Richard Rotunno --- 46 Convective Boundary Layer Heights Over Mountainous Terrain—A Review of Concepts / Stephan F. J. De Wekker and Meinolf Kossmann --- 68 On the Vertical Exchange of Heat, Mass, and Momentum Over Complex, Mountainous Terrain / Mathias W. Rotach, Alexander Gohm, Moritz N. Lang, Daniel Leukauf, Ivana Stiperski and Johannes S. Wagner --- 82 Identification and Climatology of Alpine Pumping from a Regional Climate Simulation / Maximilian Graf, Meinolf Kossmann, Kristina Trusilova and Gudrun Mühlbacher --- 93 The Atmospheric Boundary Layer during Wintertime Persistent Inversions in the Grenoble Valleys / Yann Largeron and Chantal Staquet --- 112 Energetics of Slope Flows: Linear and Weakly Nonlinear Solutions of the Extended Prandtl Model / Ivan Güttler , Ivana Marinović, Željko Večenaj and Branko Grisogono --- 125 When Can a High-Resolution Simulation Over Complex Terrain be Called LES? / Joan Cuxart --- 131 Influence of the Details of Topography on Weather Forecast – Evaluation of HARMONIE Experiments in the Sochi Olympics Domain over the Caucasian Mountains / Laura Rontu, Clemens Wastl and Sami Niemelä --- 147 Effects of Landfall Location and Approach Angle of an Idealized Tropical Cyclone over a Long Mountain Range / Liping Liu, Yuh-Lang Lin and Shu-Hua Chen
    Seiten: Online-Ressource (160 Seiten)
    ISBN: 9782889450169
    Sprache: Englisch
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Schlagwort(e): deep subsurface ; marine sediment ; deep biosphere ; ocean crust ; subseafloor sediment ; Methane ; Peru margin ; Hydrogen ; acetogenesis ; sulfate reduction ; microbiology
    Beschreibung / Inhaltsverzeichnis: Deep subsurface microbiology is a highly active and rapidly advancing research field at the interface of microbiology and the geosciences; it focuses on the detection, identification, quantification, cultivation and activity measurements of bacteria, archaea and eukaryotes that permeate the subsurface biosphere of deep marine sediments and the basaltic ocean and continental crust. The deep subsurface biosphere abounds with uncultured, only recently discovered and – at best - incompletely understood microbial populations. In spatial extent and volume, Earth’s subsurface biosphere is only rivaled by the deep sea water column. So far, no deep subsurface sediment has been found that is entirely devoid of microbial life; microbial cells and DNA remain detectable at sediment depths of more than 1 km; microbial life permeates deeply buried hydrocarbon reservoirs, and is also found several kilometers down in continental crust aquifers. Severe energy limitation, either as electron acceptor or donor shortage, and scarcity of microbially degradable organic carbon sources are among the evolutionary pressures that have shaped the genomic and physiological repertoire of the deep subsurface biosphere. Its biogeochemical role as long-term organic carbon repository, inorganic electron and energy source, and subduction recycling engine continues to be explored by current research at the interface of microbiology, geochemistry and biosphere/geosphere evolution. This Research Topic addresses some of the central research questions about deep subsurface microbiology and biogeochemistry: phylogenetic and physiological microbial diversity in the deep subsurface; microbial activity and survival strategies in severely energy-limited subsurface habitats; microbial activity as reflected in process rates and gene expression patterns; biogeographic isolation and connectivity in deep subsurface microbial communities; the ecological standing of subsurface biospheres in comparison to the surface biosphere – an independently flourishing biosphere, or mere survivors that tolerate burial (along with organic carbon compounds), or a combination of both? Advancing these questions on Earth’s deep subsurface biosphere redefines the habitat range, environmental tolerance, activity and diversity of microbial life.
    Seiten: Online-Ressource (303 Seiten)
    ISBN: 9782889195367
    Sprache: Englisch
    Standort Signatur Erwartet Verfügbarkeit
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