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  • 11
    facet.materialart.
    Unbekannt
    Naturalis Biodiversity Center
    In:  Blumea: Biodiversity, Evolution and Biogeography of Plants vol. 67 no. 1, pp. viii-xiii
    Publikationsdatum: 2024-05-10
    Schlagwort(e): Plant Science ; Ecology ; Evolution ; Behavior and Systematics
    Repository-Name: National Museum of Natural History, Netherlands
    Materialart: info:eu-repo/semantics/article
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
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  • 12
    Publikationsdatum: 2024-05-10
    Beschreibung: The present work is part of a research program financed by INGV in order to look for traces of earthquakes occurred in the past on historical buildings. At that aim, a method based on remote sensing techniques was proposed and applied to San Giorgio parish church in Argenta (Ferrara, Italy). That church was chosen because of notable availability of historical and archaeological material, already catalogued in the past years, allowing the identification of structures belonging to periods before and after the 1624 earthquake. Data provided by terrestrial remote sensing techniques (digital photogrammetry supported by laser scanning) made possible the recognition of patterns that could be due to that strong seismic event or, in general, to one or more calamitous events. The results show that the proposed method can provide potentially useful data to help confirming or excluding historical hypotheses or helping to fill information gaps. However, it should be stressed that the proposed approach does not enable the identification of unknown seismic events, providing instead data that can be associated with already known events.
    Beschreibung: INGV RIcerca Libera RESCUE (2021)
    Beschreibung: In press
    Beschreibung: JCR Journal
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
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  • 13
    Publikationsdatum: 2024-05-10
    Beschreibung: Changbaishan volcano (China/North Korea; last eruption in 1903 AD) was responsible for a Volcanic Explosivity Index (VEI) 7 eruption in 946 AD. Approximately 186,000 people live around Changbaishan and 2,000,000 tourists/year visit the volcano. An unrest occurred between 2002 and 2006. Despite the relevant hazard, the eruptive history is poorly known, a condition common to many volcanoes worldwide. Here, we investigate the extension of the areas potentially a ected by pyroclastic density currents (PDCs) in case of future eruptions following a scenario-based approach. We perform energy cone runs referred to four scenarios from columns of height 3, 10, 20 and 30 km at di erent vents. By using global datasets on PDCs, we produce spatial probability maps of PDCs invasion. Empirical laws between covered areas, PDC travelled distances, and heights of collapse are provided. In scenarios 3 and 4, PDCs expand at distances up to 42 km and 85 km, respectively. In scenarios 1 and 2, PDCs invade the touristic area and few main roads. Severe e ects emerge from scenarios 3 and 4 with the interruption of the China–North Korea land and aerial connections and PDC. Our approach may serve as guide for the rapid evaluation of the PDC-related hazard at poorly known volcanoes.
    Beschreibung: Published
    Beschreibung: 2622
    Beschreibung: 6V. Pericolosità vulcanica e contributi alla stima del rischio
    Beschreibung: JCR Journal
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
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  • 14
    Publikationsdatum: 2024-05-10
    Beschreibung: The Changbaishan Tianchi intraplate volcano is one of the most active and hazardous volcanoes of NE Asia, characterized by a summit caldera formed after the 946 CE ‘Millennium’ Plinian eruption. From December 2020 to June 2021, the frequency and magnitude of earthquakes at Tianchi were significantly higher than during background periods, with hundreds of earthquakes (46 events per month in average) and reaching a local magnitude of ML 3.1. This study reports a comprehensive deformation analysis and geophysical inversion scheme aimed to unveil the dynamics of this period. Multi-temporal InSAR analysis results of 32 ALOS-2 images from 2018 to 2022 show that the surface deformation is a combination of seasonal fluctuations (± 25 mm in average, with a maximum ± 45 mm) and a long-term positive component. The least squares linear regression of the deformation time series and temperature data, isolates the seasonal fluctuations, revealing a clear upliftsubsidence process from June 2020 to July 2021 in the caldera area. To constrain the Tianchi plumbing system dynamics, a combined inversion scheme consisting of three deformation sources is designed. The inversion results and the seismic records indicate that Tianchi volcano has experienced a low-level unrest episode from December 2020 to June 2021. The shallower plumbing system, located at about 5–9 km depth and modelled by pressurized spheroids, underwent a cumulative volume increase of 26 × 106 m3 from November 2018 to April 2021, followed by a volume decrease of 9 × 106 m3 from April to July 2021. This suggests magma uprising from the 14 km deep storage zone to the shallower plumbing system, followed by depressurization of the plumbing system due to the escape of fluids. This research provides a comprehensive understanding of the magma and fluid migration dynamics within the Tianchi multi-level plumbing system for the first time.
    Beschreibung: Published
    Beschreibung: 103775
    Beschreibung: JCR Journal
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
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  • 15
    Publikationsdatum: 2024-05-10
    Beschreibung: The emerging field of research concerning the geography of dissatisfaction focuses on explaining the formation of political inclinations and behaviors through a geographic location perspective (Iammarino et alii, 2019; Stroppe, 2023). Such dynamics are the subject of public debate, particularly with regard to rural and disadvantaged areas that seem to fuel, more than others, attitudes of political resentment, as in the case of abstentionism or protest voting (Rodríguez- Pose, 2017). Central to the research on these «less fortunate» or more marginal areas is the model that argues how citizens residing in areas relatively distant from service-providing hubs perceive inequality in access to economic and social resources (Petino, Scrofani, 2020). This perception contributes to the feeling of being ignored in the broader context of global «long networks» (Dematteis, 2021), where original local socio-cultural specificities tend to disappear, of national economic development or on the part of political elites in general (Cramer, 2016; Stroppe, 2023). Conversely, since every geographic system is marked by a vastness of tangible and intangible resources, normally affected by a dynamic process of local accumulation, it has the potential to generate territorial heritage. Such heritage, if made available to the local community and investors, could succeed in influencing the entire set of connections, both formal and informal, that participants have developed over time to manage it. The goal of asset creation and management will be the compensatory measure to reduce spatial disparities and should normally be supported by appropriate policy interventions. Activating these dynamics represents a strategic challenge and is both complex and the subject of European cohesion policies. While we may believe that (territorial) cohesion policies are a well-established objective on the part of the European Union (CEC, 2008), it is equally clear that is obviously a mistake to continue to pursue this objective in the simple application of the same models and practices of development for all, both for regions and for EU countries, with the risk of homologation of intervention and its lack of effectiveness. Therefore, it is necessary that (territorial) cohesion should be achieved by protecting and, even more, promoting the diversity of territories in order to ensure real and lasting well-being for local populations (Prezioso, 2020; Petino, Scrofani, 2020). See in this sense the report by Barca (2009) entitled «An Agenda for a reformed Cohesion Policy. A place-based approach to meeting European Union challenges and expectations» to observe how development models that incentivize processes of valorization of territorialized resources according to place-based or place evidence-based approaches, can be considered paradigmatic in the approach to «places» to their understanding and to the possible implementation of cohesion policies aimed at local specificities and for this reason, at least on paper, more effective. It is in this scenario that our observation finds its ease, in a phase that moreover sees the issue of energy transition becoming a central element of European policy, to facilitate which transition support tools, such as energy communities, have been introduced for local communities. The area of observation is the Belìce Valley in Sicily, which will be discussed in the second section. In particular, our focus is on that part that was affected by the 1968 earthquake, already the subject of reconstruction intervention in the past decades and more recently of the community policy that, in the 2014-2020 seven-year period, allowed for the establishment of a new governance entity called the Local Action Group (LAG) Valle del Belìce. New opportunities could arise from the constituting energy communities and from the hypothesis of a candidature as a project area in the National Strategy for Inner Areas, which we will discuss in more detail in the third paragraph. The aim of this work is to reconstruct the territorial mosaic in order to identify some characteristics and possible development trajectories by offering an interpretation, a guiding thread and a possible way out of typical dynamics of stagnation that have been keeping an area of great interest on the margins for just over fifty years (Messina, 2019; Mattia et alii, 2021).
    Beschreibung: Published
    Beschreibung: 129-152
    Beschreibung: OS: Terza missione
    Beschreibung: N/A or not JCR
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
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  • 16
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    Oxford University Press on behalf of the Royal Astronomical Society and the German Geophysical Society
    Publikationsdatum: 2024-05-10
    Beschreibung: Infrasound monitoring plays an important role in the framework of the surveillance of Mt. Etna, Europe’s largest active volcano. Compared to seismic monitoring, which is particularly effective for buried sources, infrasound signals mirror the activity of shallow sources like Strombolian explosions or degassing. The interpretation of infrasound signals is difficult to the untrained eye, as we have to account for volcanic and non-volcanic sources. The problem of handling large and complex data sets can be tackled with machine learning, namely pattern recognition techniques. Here, we focus on so-called ‘Unsupervised Learning’, where we identify groups of patterns being similar to each other. The degree of similarity is based on a metric measuring the distance among the features of the patterns. This work aims at the identification of typical regimes of infrasound radiation and their relation to the state of volcanic activity at Mt. Etna. For this goal, we defined features describing any infrasound pattern. These features were obtained using wavelet transform. We applied ‘Self-Organizing Maps’ (SOM) to the features projecting them to a 2-D representation space—the ‘map’. An intriguing aspect of SOM resides in the fact that the position of the patterns on the map can be expressed by a colour code, in a manner that similar patterns are assigned a similar colour code. This simplified representation of multivariate patterns allows to follow the development of their characteristics with time efficiently. During a training phase we considered a reference data set, which encompassed a large variety of scenarios. We identified typical groups of patterns which correspond to a specific regime of activity, being representative of the state of the volcano or noise conditions. These groups form areas on the 2-D maps. In a second step, we considered a test data set, which was not used during the training phase. Applying the same pre-processing as for the training data, we blindly assigned the test patterns to the regimes found before, identifying the one whose colour code is most similar to the one calculated to the test pattern. We are thus able to assess the validity of the prediction. The classification scheme presented provides a reliable assessment of the state of activity and adds useful and supplementary details to the results of the real-time automatic system in operation at Istituto Nazionale di Geofisica e Vulcanologia—Osservarorio Etneo. This is of particular importance when no visible information of the volcanic activity is available either for unfavourable meteorological conditions or during night time.
    Beschreibung: IMPACT PROJECT (INGV Department strategic Projects - 2019)
    Beschreibung: Published
    Beschreibung: 1-16
    Beschreibung: JCR Journal
    Schlagwort(e): infrasound ; volcano monitoring ; self-organization ; time-series analysis ; machine learning ; volcanic hazards and risks ; 04.06. Seismology ; 04.08. Volcanology
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
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  • 17
    Publikationsdatum: 2024-05-10
    Beschreibung: Cosmic-ray particles have long been studied as a potential source of noise for interferometric gravitational-wave detectors. These particles, mostly muons at sea level, can interact with the detector mirrors inducing thermal effects, which, at the detector output, could be observed as transient excesses of noise, namely glitches. For the Advanced Virgo detector, the rate of these particles is monitored by a muon telescope located in the vicinity of the detector central building. We present here the correlation study of the rate of muons with the rate of glitches during a couple of weeks at the end of the third joint LIGO-Virgo observing, O3. We also present the correlation of the previous quantities with other environmental effects, showing how the latter dominate the glitch rate and can explain a significant part of its variations.
    Beschreibung: Published
    Beschreibung: 059
    Beschreibung: OSA3: Climatologia e meteorologia spaziale
    Beschreibung: N/A or not JCR
    Schlagwort(e): virgo ; cosmic muons
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
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  • 18
    Publikationsdatum: 2024-05-10
    Beschreibung: The geodynamic significance of continental volcanoes located far from the plate boundaries remains highly controversial as exemplified by contrasting models that favor either a deep mantle plume rooted from the base of the mantle or, alternatively, the shallower subduction or lithospheric-related processes. The Changbaishan (also referred to as Paektusan or Baekdusan) volcanic field (CHVF), located in the interior of eastern Eurasian continent, provides a good opportunity to constrain the magma origin and geodynamic mechanism governing continental intraplate volcanism. Here, we review the volcanic geology, eruptive history, geochemical data on volcanic rocks and released gases and geophysical observations of the Changbaishan volcanoes with the aim to (a) reconstruct temporal and spatial evolution of eruptive activities, (b) identify source of the primary magmas, (c) delineate magma evolution in the crust, (d) highlight geodynamic significance of the CHVF volcanism, (e) characterize crustal magmatic structure, and (f) analyze recent dynamics with a focus on the 2002–2005 unrest episode at Tianchi caldera, the only active volcano in the area (last eruption in 1903 CE). The eruptive activities of the Changbaishan volcanoes can be divided into three main stages: (1) central vent and fissure eruptions of basaltic magmas started approximately in Pliocene and culminated in Early Pleistocene (ca. 5–1 Ma), forming a shield-like lava plateau; (2) multi-stage eruptions of voluminous silicic (and minor intermediate) magmas constructed cones of the polygenetic volcanoes (e.g., Tianchi, Wangtian'e and Namphothe) between Late Pliocene and Pleistocene (3.14–0.01 Ma); and (3) explosive silicic eruptions [e.g., the Millennium eruption (ME) in 946 CE] during Holocene dominated the Tianchi volcano and led to the formation of its summit caldera. Small-scale eruptions of basaltic magmas from monogenetic scoria cones (and minor fissures) were coeval with the Tianchi cone-construction stage (ca. 1–0.01 Ma). The elemental and Sr-Nd-Pb isotopic characteristics of the Changbaishan basalts indicate an enriched, heterogeneous mantle source with components from depleted mantle (DM), enriched mantle 1 (EM1) and subduction-related materials (e.g., recycled oceanic crust and sediments). The interaction between the DM-like peridotite and carbonatite melts released by subducted oceanic slab in the mantle transition zone (MTZ) led to the formation of carbonated peridotite characterized by low δ26Mg values. By contrast, origin of the EM1-like components remains highly debated. The alkaline basalts and intermediate to silicic volcanic rocks from the polygenetic volcanoes constitute an integrated spectrum of magma composition controlled by closed system fractionation according to their element co-variations and uniform Sr-Nd-Pb isotopic compositions. Subordinate mingling between trachyte and comendite has been reported only for the ME at Tianchi caldera. The occurrence of a big mantle wedge (BMW) with a continuous stagnant Pacific slab in the MTZ is responsible for origin of the Changbaishan volcanoes. On the basis of subduction dynamics of the Pacific plate, we present a Late Cenozoic geodynamic framework of NE Asia, which can account for formation of the present-day BMW system via: (a) shallow-angle subduction (55–25 Ma), (b) slab rollback and sinking into the MTZ together with trench retreat (25–15 Ma), and (c) slab bottoming, thickening and flattening in the MTZ (15–0 Ma). Constraints from reconstructed plate motion history, numerical simulation and present-day geophysical observation of the BMW lend support to our geodynamic model, which reconciles well with the Izanagi slab breakoff, development of the Japan Sea and Late Cenozoic continental intraplate volcanism in NE China. In response to the Rayleigh-Taylor instability, a MTZ-derived plume incorporating fragments of carbonated peridotite, EM1- like components and the Pacific slab-derived materials ascended and experienced decompression partial melting at shallow depths to feed the Changbaishan volcanism. From the perspective of magma origin and geodynamic mechanism, the Changbaishan volcanoes can shed light on the potential relationships between origin of continental intraplate volcanism and deep subduction of oceanic lithosphere. The spatial distribution of the Changbaishan volcanoes shows that the magmas ascended along a NW-SE trending, strike-slip fault oriented perpendicularly to the major faults delimiting the Songliao Basin, NE China. This interpretation is consistent with the 2009–2013 epicenters of tectonic earthquakes, also suggesting a NW-SE trending, buried and seismically active deep fault in the crust. Geophysical and petrological constraints indicate the presence of magma reservoirs at crustal depth beneath the active Tianchi volcano, which are likely to have high thermal state and act as the source of heat and material for shallow hydrothermal system. In consideration of magma origin from the MTZ-derived plume, the volatile outgassing from the Tianchi volcano associated with deep subduction of the Pacific plate represents an important mechanism for liberating volatile elements (especially carbon) from Earth's interior to the exosphere. Tianchi caldera suffered an unrest episode between 2002 and 2005, as evidenced by increased shallow seismicity, surface uplift and changes in chemical and isotopic composition of the hydrothermal gases. Such volcanic unrest was triggered by pressurization of a 2–6 km depth magma reservoir, from which magmatic volatiles were released into shallow hydrothermal system. Tianchi caldera shows different types of hazards related to volcanic, tectonic, geomorphological and hydrological processes. Further monitoring and additional volcanological data, especially those on eruptive dynamics of the past eruptions, should be collected to better constrain the potential hazards of future eruptions and to improve early warning management.
    Beschreibung: Published
    Beschreibung: 19-52
    Beschreibung: 1V. Storia eruttiva
    Beschreibung: JCR Journal
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
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  • 19
    Publikationsdatum: 2024-05-10
    Beschreibung: Unrest began in July 2021 at Askja volcano in the Northern Volcanic Zone (NVZ) of Iceland. Its most recent eruption, in 1961, was predominantly effusive and produced ∼0.1 km3 lava field. The last plinian eruption at Askja occurred in 1875. Geodetic measurements between 1983 and 2021 detail subsidence of Askja, decaying in an exponential manner. At the end of July 2021, inflation was detected at Askja volcano, from GNSS observations and Sentinel‐1 interferograms. The inflationary episode can be divided into two periods from the onset of inflation until September 2023. An initial period until 20 September 2021 when geodetic models suggest transfer of magma (or magmatic fluids) from within the shallowest part of the magmatic system (comprising an inflating and deflating source), potentially involving silicic magma. A following period when one source of pressure increase at shallow depth can explain the observations.
    Beschreibung: Published
    Beschreibung: e2023GL106730
    Beschreibung: OSV2: Complessità dei processi vulcanici: approcci multidisciplinari e multiparametrici
    Beschreibung: JCR Journal
    Repository-Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Materialart: article
    Standort Signatur Erwartet Verfügbarkeit
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  • 20
    Publikationsdatum: 2024-05-10
    Beschreibung: Over the past 25 years, research groups worldwide have been actively studying soil reflectance across the visible, near-infrared, shortwave infrared, and thermal regions for chemometric purposes. These groups have generated numerous soil spectral libraries (SSLs) with varying coverage and using different sensors and protocols. However, merging or comparing SSLs is challenging due to factors related to instrumentation and measurement protocols. With the emergence of hyperspectral technology, there is a growing interest in utilizing SSLs for the quantitative assessment of soil properties on a global scale. P4005 "Standards and Protocols for Soil Spectroscopy" is a working group established under the IEEE-Standards Association that aims to harmonize SSLs by developing an agreed protocol. The final protocol release is expected in early 2024, enabling intercompatible, reliable, and reproducible soil spectral measurements and facilitating the development of a global SSL.
    Materialart: info:eu-repo/semantics/conferenceObject
    Standort Signatur Erwartet Verfügbarkeit
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