Percentile indices for assessing changes in heavy precipitation events     

Christoph Schär  Nikolina Ban  Erich M. Fischer  Jan Rajczak  Jürg Schmidli  Christoph Frei  Filippo Giorgi  Thomas R. Karl  Elizabeth J. Kendon  Albert M. G. Klein Tank  Paul A. O’Gorman  Jana Sillmann  Xuebin Zhang  Francis W. Zwiers 《Climatic change》2016,137(1-2):201-216

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Combined discrete and continuous gravity observations at Mount Etna     

Daniele Carbone  Gennaro Budetta  Filippo Greco  Hazel Rymer 《Journal of Volcanology and Geothermal Research》2003,123(1-2):123

Systematic investigation of discrete gravity measurements has continued at Mount Etna since 1986. The network now covers an area of 400 km² with about 70 stations 0.5–3 km apart. Mass redistributions occurring at depths ranging between about 8 km below sea level and a few hundred metres below the surface (magma level changes within the shallower parts of the feeding conduits) have been identified from these data. Conventional (discrete) microgravity monitoring on a network of stations furnishes only instantaneous states of the mass distribution at continuously active systems. In order to obtain information on the rate at which the volcanic processes (and thus mass transfers) occur, three stations for continuously recording gravity where installed on Mount Etna in 1998. A 16-month long sequence from one of the continuously running stations (PDN, located 2 km from the active northeast crater at the summit of Etna volcano) is presented. After removing the effects of Earth Tide and tilt, the correlation of the residual gravity sequence with simultaneous recordings of meteorological parameters acquired at the same station was analysed. Once the meteorological effects have also been removed, continuous gravity changes are within 10 μGal of gravity changes measured using conventional microgravity observations at sites very close to the continuous station. This example shows how discrete and continuous gravity observations can be used together at active volcanoes to get a fuller and more accurate picture of the spatial and temporal characteristics of volcanic processes.  相似文献   

A comparative study on a complex URM building: part I—sensitivity of the seismic response to different modelling options in the equivalent frame models     

Ottonelli  Daria  Manzini  Carlo Filippo  Marano  Corrado  Cordasco  Emilia Angela  Cattari  Serena 《Bulletin of Earthquake Engineering》2022,20(4):2115-2158

Bulletin of Earthquake Engineering - The paper presents the comparison of the results of nonlinear static analyses carried out using six software packages (SWs) available at professional level and...  相似文献   

The evolution of rural areas influenced by large-scale farming: four case studies from Hungary     

Mikle  György  Randelli  Filippo 《GeoJournal》2022,87(1):99-110

GeoJournal - In order to study complex transformation of rural areas in the long term, our paper aims to integrate the concepts of rural restructuring and evolutionary economic geography. We argue...  相似文献   

Identification of standing fronts in steady state fluid flows: exact and approximate solutions for propagating MHD modes     

Filippo Pantellini  Léa Griton 《Astrophysics and Space Science》2016,361(10):335

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Mathematical Optimization Problems for Particle Finite Element Analysis Applied to 2D Landslide Modeling     

Wang  Liang  Zhang  Xue  Zaniboni  Filippo  Oñate  Eugenio  Tinti  Stefano 《Mathematical Geosciences》2021,53(1):81-103

Mathematical Geosciences - Notwithstanding its complexity in terms of numerical implementation and limitations in coping with problems involving extreme deformation, the finite element method (FEM)...  相似文献   

Performance of “G-Pisa” ring laser gyro at the Virgo site     

Jacopo Belfi  Nicolò Beverini  Filippo Bosi  Giorgio Carelli  Angela Di Virgilio  Dmitri Kolker  Enrico Maccioni  Antonello Ortolan  Roberto Passaquieti  Fabio Stefani 《Journal of Seismology》2012,16(4):757-766

The ring laser gyroscope ??G-Pisa?? has been taking data inside the Virgo interferometer central area with the aim of performing high sensitivity measurements of rotations in the vertical as well as in the horizontal orientation. We discuss the main characteristics of the instrument, describing its mechanical design and presenting the measured sensitivity limit. By applying a simple effective model for the laser gyroscope, we show that the stability of the sensor above 10?s of integration time is mainly limited by backscattering effects. The horizontal rotation rate signal is also compared with the signals recorded by the Virgo environmental monitoring system and by a biaxial mechanical tiltmeter rigidly fixed on top of the gyrolaser mounting frame.  相似文献   

Stromboli Island (Italy): Scenarios of Tsunamis Generated by Submarine Landslides   总被引：1，自引：0，他引：1  

Stefano Tinti  Filippo Zaniboni  Gianluca Pagnoni  Anna Manucci 《Pure and Applied Geophysics》2008,165(11-12):2143-2167

Stromboli is an Italian volcanic island known for its persistent state of activity, which leads to frequent mass failures and consequently to frequent tsunamis ranging from large (and rare) catastrophic events involving the entire southern Tyrrhenian Sea to smaller events with, however, extremely strong local impact. Most of tsunamigenic landslides occur in the Sciara del Fuoco (SdF) zone, which is a deep scar in the NW flank of the volcano, that was produced by a Holocene massive flank collapse and that is the accumulation area of all the eruptive ejecta from the craters. Shallow-water bathymetric surveys around the island help one to identify submarine canyons and detachment scars giving evidence of mass instabilities and failures that may have produced and might produce tsunamis. The main purpose of this paper is to call attention to tsunami sources in Stromboli that are located outside the SdF area. Further, we do not touch on tsunami scenarios associated with gigantic sector collapses that have repeat times in the order of several thousands of years, but rather concentrate on intermediate size tsunamis, such as the ones that occurred in December 2002. Though we cannot omit tsunamis from the zone of the SdF, the main emphasis is on the elaboration of preliminary scenarios for three more possible source areas around Stromboli, namely Punta Lena Sud, Forgia Vecchia and Strombolicchio, with the aim of purposeful contributing to the evaluation of the hazard associated with such events and to increase the knowledge of potential threats affecting Stromboli and the nearby islands of the Aeolian archipelago. The simulations show that tsunami sources outside of the SdF can produce disastrous effects. As a consequence, we recommend that the monitoring system that is presently operating in Stromboli and that is focussed on the SdF source area be extended in order to cover even the other sources. Moreover, a synoptic analysis of the results from all the considered tsunami scenarios leads to a very interesting relation between the tsunami total energy and the landslide potential energy, that could be used as a very effective tool to evaluate the expected tsunami size from estimates of the landslide size.  相似文献   

数值模式不同分辨率和地形对东亚降水模拟影响的试验   总被引：57，自引：23，他引：34  

高学杰  徐影  赵宗慈  Jeremy S.PAL  Filippo GIORGI 《大气科学》2006,30(2):185-192

为探讨东亚地区降水数值模拟中水平分辨率和地形的作用,使用RegCM2区域气候模式,采用不同的模式分辨率和地形,对东亚降水进行对比模拟试验.结果表明,东亚地区降水的模拟效果取决于模式的水平分辨率,模式分辨率越高,模拟的效果越好.使用实际地形的模拟效果好于使用平滑地形的.但同时,使用较高分辨率的平滑地形的模拟,效果好于使用次高分辨率的实际地形的模拟.这表明在东亚地区降水模拟中,分辨率与地形相比,起着至少同样重要的作用.结果指出,对东亚地区降水的模拟而言,使用60 km及以上分辨率可能是必需的.  相似文献   

Shaking table tests on a masonry building monitored using smart bricks: Damage detection and localization     

Andrea Meoni  Antonella D'Alessandro  Nicola Cavalagli  Massimiliano Gioffré  Filippo Ubertini 《地震工程与结构动力学》2019,48(8):910-928

The seismic behavior of unreinforced masonry buildings is typically characterized by premature brittle collapse mechanisms that can cause serious consequences for the protection of human lives and for the preservation of historical and cultural heritage. Structural health monitoring can be a powerful tool enabling a quick post-earthquake assessment of the structure's performance, but its applications are still scarce as a consequence of the severe limitations affecting off-the-shelf sensing technologies, in terms of local nature of the measurements, costs, as well as long-term behavior, installation, and maintenance. To overcome some of these limitations, the authors have recently proposed a new sensing technology, called “smart brick,” that is a durable clay brick doped with stainless steel microfibers, working as a smart strain sensor for masonry buildings. This paper presents the first full-scale application of smart bricks, used for detecting and localizing progressive earthquake-induced damage in an unreinforced masonry building subjected to shaking table tests. Smart bricks are employed to detect changes in load paths on masonry walls, comparing strain measurements acquired after each step of the seismic sequence with those referring to the undamaged structure. Experimental results are interpreted using a 3D finite element model built to reproduce the shaking table tests. Overall, the results demonstrate that the smart bricks can effectively reveal local permanent changes in structural conditions following a progressive damage, therefore being apt for earthquake-induced damage detection and localization.  相似文献