zevfar 19191a764c -7-ice-extreme-v2-ita-204[ -7-ice-extreme-v2-ita-204 ][ -7-ice-extreme-v2-ita-204 ][ -7-ice-extreme-v2-ita-204 ]link= -7-ice-extreme-v2-ita-204link= -7-ice-extreme-v2-ita-204link= -7-ice-extreme-v2-ita-204
windows 7 ice extreme v2 ita 204
Abstract: One of the key challenges in earthquake geology is the characterization of the temporal and spatial distribution of fault-slip and its partitioning during the coseismic, interseismic, and post-seismic periods. In fact, the temporal and spatial accumulation of slip along an active fault is essential to understand the hazard posed by the fault. Furthermore, destructive earthquakes are infrequent, even along active faults and this is an inherent limitation to the knowledge towards reconstructing the seismic cycle.Modern techniques such as Remote Sensing, Geodesy, Geomorphology, Paleoseismology, and Geochronology play a vital role in constraining part of or full seismic cycles. In recent years t hese techniques have enhanced the accuracy and temporal coverage of the long-term as well as the short term deformation windows from a local to regional scales. However, t o decipher the deformation cycle from local scale to global scale, there is a need of better integration of such advanced techniques applied across different fault systems, globally. Furthermore, comparing the recent activity of faults with the evolution recorded on a longer time frame bridging earthquake science and landscape evolution studies is another pivotal step towards Seismic Hazard Assessment and understanding seismic cyclesThe goal of this session is to bring together innovative approaches and techniques, to take a comprehensive look at the earthquake cycle for plate boundary fault systems and to fault systems sitting far away from the plateboundary.
Abstract: Complex geochemical reactions and physical processes control submarine hydrothermal systems, where life can adapt and thrive in extremely harsh environments. On account of these natural processes hydrothermal environments could potentially constitute ideal natural laboratories which will serve for investigating lit osphere- hydrosphere-biosphere interactions. Moreover, geohazards associated to submarine hydrothermal systems, which still represent a tricky enigma for the scientific community, could be better evaluated increasing preparedness during a crisis. In this session, we invite contributions dealing with natural hazards mainly related to magmatic and tectonic activities as well as to biologic and biogeochemical processes including measurements, explorations and modeling of geochemical processes over active hydroth rmal systems located bot in shallow and deep waters. For an optimal assessment of the risks, such submarine systems must be continuously monitored by a multidisciplinary scientific team and smart, novel instrumentation as part of in-situ observatories supported by discrete sampling and measurements.
Abstract: Over 40% of the world population lives within 100 km from the coast and those populations are at risk of extreme shaking or flooding due to storms, earthquakes, and tsunamis. Therefore, assessing future risks to coastal communities relies on past and present observations of high magnitude or high intensity events. High magnitude events include the 2004 Indian Ocean and 2011 Tohoku Oki earthquakes and tsunamis. High intensity events such as Cyclone Nargis in 2008 and Typhoon Hayian in 2013 remind us that tropical storms can be equally devastating. In areas where instrumental observations are lacking, paleoreconstruction studies utilize proxies (biological, sedimentological, or chemical) and their modern analogues to develop paleorecords of geohazards in coastal environments, thus providing critical insight on the frequency and magnitude or intensity of coastal geohazards.In this session we invite research that improves our understanding of past, present, and future coastal geohazard risk. Specifically, work aimed at developing or refining biological, geological or chemical proxies that can be applied to paleoreconstruction studies of coastal geohazards. We also encourage research that incorporates proxies and modelling to refine paleorecords of coastal geohazards. Interdisciplinary or multi-proxy studies are highlyencouraged.
Abstract: Along the Quaternary the continental water cycle experienced important changes, including both extreme events of different magnitude, duration and geographical extent and long-term trends that shaped fluvial landscapes. Hydrological variability caused by climate and environmental forcing are recorded in stratigraphic sequences of river and lake deposits, botanical archives and, more recently, archaeological and historical evidence. In this session, besides the recognition and characterization of both floods and droughts, major topics are represented by the detection of changes in liquid and solid discharge along decades and millennia, with their effects on channel patterns, alluvial landforms, lakes and ancient societies. Contributions with multi-disciplinary approaches are warmly suggested, bringing together scientists from various disciplines, with the aim of integrating different sources of data, methods and research perspectives. The session wants also to highlight innovative techniques and reference case studies for disentangling global forcing factors from local and autocyclic variables. The focus of session is on hydrological changes of the past, anyhow attention is also paid to simulation of past extreme events for assessing the possible variations and scenarios expected in the near future.The session is co-organized by TERPRO-Terrestrial Processes, Deposits and History group HYPEDAE (PalaeoHYdrological, -PEdological and -Aeolian processes shaping Quaternary landscapes) and PAGES FloodWorking Group.
Abstract: Extreme geological phenomena with catastrophic environmental consequences have often been initiated by climate changes that occurred in the Pleistocene and occur nowadays, causing sudden increases in activity of glacial processes by forming the glacial-lake outburst floods. In addition, the rapid release of large amount of meltwater contributed to the glacier accelerating as a result of basal sliding over water saturated bed and due to tensile longitudinal stress. These extreme processes not only significantly transformed the land relief of the proglacial areas, but also water circulation in the Atlantic Ocean, resulting in the global climate changes.Proposed session creates a space and opportunity for discussion on recent investigations on glacial-lake outburst floods and merges geological, geomorphological and sedimentological approaches and advanced numerical modeling, which all shed a new light on sediment-landform associations in reconstructions of the glacial flood- related processes. As a result of modelling, relation between sub-/proglacial outflow and ice sheet dynamics can be found along with the ability of meltwaters to collect in sub-, supra- and proglacial settings. In this session both past and present-day glaciated areas are considered and this combination helps in better understandingenvironmental changes during the Quaternary and predicting them in the future.
Abstract: Developing palaeo sea-level reconstructions from low latitude coastal environments is extremely important for understanding drivers and effects of past climate and sea-level change, but working in these environments can be extremely challenging because of issues related to proxy preservation, dating and interpreting environmental changes. This session welcomes contributions to on-going research efforts to quantify the magnitude of past sea-level changes and their drivers in low latitude locations globally during the Quaternary. We are particularly interested in studies that take new approaches to developing reconstructions, for example byusing novel proxy methods, or that tackle issues of dating or interpretation of proxy records.
Abstract: One of the spectacular manifestations of past climate change was the fluctuating Himalayan glaciers, which have also greatly modified land surfaces. The glaciers seem to have responded to the millennial/centennial- scale post-last glacial maxima climate fluctuations. Understanding the response to these minor natural forcing factors especially becomes important in the recent anthropogenically induced rise in global temperature that has led to the dramatic decrease in the ice volume. The Himalayan glaciers are not only a source of freshwater but also a key source of sediments that often get mobilised during extreme events. However, the understanding of the Himalayan glaciated terrain to the climate variability is yet limited by sparse geomorphological mapping and coarse chronometric resolution.The session invites abstracts from studies focusing on the Quaternary glaciation of the Himalayas, particularly since the last glacial maxima. Also, studies focusing on the response of the paraglacial zones to climate variabilityare welcome.
Abstract: Due to the increased dissaperance of sea-ice cover the modern Arctic becomes more vulnerable to storminess and erosion, threatening coastal communities and ecosystems. However, the consequences of future changes in Arctic storminess remain highly uncertain. Paleoenvironmental data are well-suited to close these critical knowledge gaps by providing empirical constraints on conditions that fall outside the envelope of variability covered by observations. Arctic coastal deposits including beach-ridge plains and coastal lacustraine archives are often well-preserved. Since the last deglaciation, rates of isostatic uplift in number of Arctic locations typically outpaced global sea-level rise, preserving coastal sediment sequences that cover the entire Holocene. During this session, we will discuss how Arctic paleostorminess research may contribute to better understanding of a long- term climate changes in the region and help to define the severity and distribution of coastal hazards over timeframes longer than the historical records. Contributions from both glaciated and ice-rich permafrost regions of the Arctic exploring storm signals and impacts (using geomorphological, sedimentological, geophysical and modelling tools) recorded in beach and lake sediments are particularly welcomed. Better knowledge on the extreme storms preserved in geologic archives is crucial to enable Arctic society to understand and plan for stormsof the future. 2ff7e9595c
Commentaires