R. Sulpizio

R. Sulpizio
Università degli Studi di Bari Aldo Moro | Università di Bari · Department of Earth and geo-environmental sciences

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147
Publications
34,860
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4,661
Citations
Citations since 2017
18 Research Items
1880 Citations
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2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300
2017201820192020202120222023050100150200250300

Publications

Publications (147)
Conference Paper
Full-text available
The vesiculation of magmas is driving volcanic eruptions by providing the necessary buoyancy for the magmatic mixture to ascent from the crustal storage to Earth’s surface. Bubble nucleation, bubble growth and bubble coalescence modify the rheology of magmas and modulate the style and intensity of an eruption. The ingestion of carbonate-bearing wal...
Article
Explosive activity preceding the ~40 ka Campanian Ignimbrite (CI) eruption in the Neapolitan volcanic area, Southern Italy, has long been speculated based on the occurrences of widespread tephra layers, with a Campanian geochemical signature, such as the C-22, X-5, and X-6, preserved in Mediterranean Marine Isotope Stage (MIS) 5 sedimentary records...
Article
The sedimentological, lithological and textural characteristics of the Brown Tuffs (BT) pyroclastic deposits, combined with their grain-size, componentry and geochemical glass compositions, are here investigated to obtain information on the transport and depositional mechanisms of the corresponding pyroclastic density currents (PDCs). The BT are wi...
Article
In this paper, we present results of the reconstruction of the total grain size distribution (TGSD) of the material erupted during explosive volcanic eruptions at Campi Flegrei (Italy) considering all components (juvenile, lithic and crystal clasts). To date, the few TGSDs made available have been mostly reconstructed by assuming that the tephra de...
Article
Lake Ohrid, located in the Central Mediterranean region downwind of the Italian volcanoes, has great potential for developing a detailed record of the explosive activity of these volcanoes. Electron microprobe and Laser Ablation Inductively Coupled Plasma Mass Spectrometry geochemical analyses of juvenile glass fragments of previously not analysed...
Article
Five cores from the southern Tyrrhenian and Ionian seas were studied for their tephra and cryptotephra content in the 4.4–2.0 ka time interval. The chronological framework for each core was obtained by accelerator mass spectrometry 14C dating, the occurrence of distinct marker tephra and stratigraphic correlation with adjacent records. Tephrochrono...
Poster
Full-text available
The interaction of pyroclastic density currents (PDCs) with the substrate during transport, deposition, and erosion ultimately controls the runout distance and damage potential of these dangerous flows. Despite the importance of these basal processes, directly investigating the basal region of PDCs in real time is extremely difficult. Instead, volc...
Poster
The quantitative texture analysis (QTA) is an instrument of paramount importance for the modern study of pyroclastic deposits. Using remotely captured images and stereology it is possible to analyze the texture completely, quickly, accurately, with the possibility of automating an important part of the analytical process. The method provides critic...
Article
The 1913 sub-Plinian eruption of Fuego de Colima volcano (Mexico) occurred after almost 100 years of effusive and (minor) Vulcanian explosive activity, which modulated dome growth and destruction. Dome extrusion persisted from 1869 to 1913. The transition to explosive eruption started on 17 January 1913, and it progressed in three phases: (1) openi...
Article
New tephrostratigraphic data from three marine cores sampled in different depositional settings around southern Italy's coastline allowed correlating each of them with the regional tephrostratigraphy and to gain insights on ash dispersal from explosive eruptions of various intensities. Volume magnetic susceptibility curves, lithological analysis an...
Article
Pyroclastic density currents (PDCs) can have devastating impacts on urban settlements, due to their dynamic pressure and high temperatures. Our degree of understanding of the interplay between these hot currents and the affected infrastructures is thus fundamental not only to implement our strategies for risk reduction, but also to better understan...
Article
Full-text available
Pyroclastic density currents (PDCs) represent one of the most dangerous phenomena occurring in explosive volcanic eruptions, and any advance in the physical understanding of their transport and sedimentation processes can contribute to improving their hazard assessment. The 10–11 July 2015 eruption at Volcán de Colima provided a unique opportunity...
Article
Databases facilitate the rapid access of crucial information, consequently these tools are vital to the various disciplines within the Earth sciences that study volcanic rocks. In the central Mediterranean, archives of data describing the bulk and glass compositions of volcanic rocks exist, but those resources are not structured as searchable datab...
Article
Available online xxxx Editor: T.A. Mather Keywords: conduit/feeding system sustained explosive eruption eruption behaviour driving pressure partition lithic erosion The current paradigm for volcanic eruptions is that magma erupts from a deep magma reservoir through a volcanic conduit, typically modelled with fixed rigid geometries such as cylinders...
Article
Full-text available
The siting and design of a Tidal Energy Converter (TEC) require the characterization of the flow velocity field acting in terms of space and time, in order to assess the hydrodynamic forces, to calculate the structural loading and power capacity, also helping investment strategy and project financing. In this framework, the selection of the emplace...
Article
Full-text available
Marine renewable energy deployment involves site resource assessment as strategic support for installation and optimization. This part of the design needs to be based on best available measurement technologies and deployment methods, minimizing the investments. The siting and design of a kinetic energy converter (like a Tidal Energy Converter ones)...
Presentation
We find that decelerating volcanic granular flows can entrap loose material from the place due to high shear stress exorted from the flow base. The difference in velocity between the moving flow and the loose material at its base imparts rotation, which resuñts information of vortexes similar to Kelvin-Helmholtz instabilities in fluids.
Poster
Quantitative texture analysis (QTA) is crucial instrument for the modern study of pyroclastic deposits. Using remote Imaging and image analysis coupled with stereology, permit this analysis of granulometric texture in a complete, fast, automatic and accurate way. The method provides critical information regarding the fragmentation efficiency of an...
Article
Full-text available
Classifications of volcanic eruptions were first introduced in the early twentieth century mostly based on qualitative observations of eruptive activity, and over time, they have gradually been developed to incorporate more quantitative descriptions of the eruptive products from both deposits and observations of active volcanoes. Progress in physic...
Article
Geological granular flows are highly complex, gravity-driven phenomena whose different behaviors depend on the mechanical properties, density and granulometric distributions of the constituent materials. Years of research have produced significant advances in understanding transport and deposition processes in granular flows. However, the role and...
Article
Full-text available
The DEEP site sediment sequence obtained during the ICDP SCOPSCO project at Lake Ohrid was dated using tephrostratigraphic information, cyclostratigraphy, and orbital tuning through the marine isotope stages (MIS) 15-1. Although this approach is suitable for the generation of a general chronological framework of the long succession, it is insuffici...
Conference Paper
Full-text available
A common ground deformation and microgravity array of benchmarks lies on the southern slope of Mt. Etna volcano and is routinely measured by GPS and relative gravimetry methods. The array was installed for monitoring the ground motion and underground mass changes along the southern rift of the volcano and data are usually processed and interpreted...
Article
Full-text available
Lake Ohrid (Macedonia, Albania) is thought to be more than 1.2 million years old and host more than 300 endemic species. As a target of the International Continental scientific Drilling Program (ICDP), a successful deep drilling campaign was carried out within the scope of the Scientific Collaboration on Past Speciation Conditions in Lake Ohrid (SC...
Conference Paper
Full-text available
The 472 AD Pollena sub-Plinian eruption of Vesuvius was characterized by three main eruptive phases. Pulsatory eruptive dynamics were driven by magmatic fragmentation of a phonolitic (L1) to tephri-phonolitic magma (L8) during Phases I and II, whereas phreatomagmatic fragmentation dominated Phase III. In order to investigate magma dynamics, we inte...
Article
Full-text available
Leaching experiments were carried out on fresh ash samples from Popocatépetl 2012, Etna 2011, and Etna 2012 eruptions, in order to investigate the release of compounds in both double-deionized and lake (Lake Ohrid, FYR of Macedonia) waters. The experiments were carried out using different grain sizes and variable stirring times (from 30 min to 7 da...
Article
Full-text available
Gamma ray (GR) fluctuations and potassium (K) values from downhole logging data obtained in the sediments of Lake Ohrid from 0 to 240 m below lake floor (b.l.f). correlate with fluctuations in δ18O values from the global benthic isotope stack LR04 (Lisiecki and Raymo, 2005). GR and K values are considered a reliable proxy to depict glacial–intergla...
Article
Full-text available
Ancient lakes, like lakes Ohrid and Prespa on the Balkan Peninsula, have become model systems for studying the link between geological and biotic evolution. Recently the scientific deep drilling program "Scientific Collaboration on Past Speciation Conditions in Lake Ohrid" (SCOPSCO) has been launched to better understand the environmental, climatic...
Article
A~tephrostratigraphic record covering the Marine Isotope Stages (MIS) 1–15 was established for the DEEP site record of Lake Ohrid (Macedonia/Albania). Major element analyses (SEM-EDS/WDS) were carried out on juvenile fragments extracted from 12 tephra layers (OH-DP-0115 to OH-DP-2060). The geochemical analyses of the glass shards of all of these la...
Article
Full-text available
Lake Ohrid (FYROM, Albania) is thought to be more than 1.2 million years old and hosts more than 200 endemic species. As a target of the International Continental Scientific Drilling Program (ICDP), a successful deep drilling campaign was carried out within the scope of the Scientific Collaboration on Past Speciation Conditions in Lake Ohrid (SCOPS...
Conference Paper
Full-text available
The devastating power of pyroclastic density currents (PDC) is mainly related to flow velocity, particle volumetric concentration and temperature. The main parameter for expressing the impact of PDC is the dynamic pressure, 1/2 u 2 (is flow density and u is velocity along flow direction). In volcanic history of Vesuvius area, the pyroclastic densit...
Article
Full-text available
Leaching experiments were carried out on fresh ash samples from Popocatépetl 2012, Etna 2011 and 2012 eruptions, in order to investigate the release of compounds in both double-deionised and lake (Ohrid lake, FYR of Macedonia) waters. The experiments were carried out using different grain sizes and variable time of stirring (from 30 min to 7 days)....
Conference Paper
Full-text available
Nevado de Toluca volcano is one of the largest stratovolcanoes in the Trans-Mexican Volcanic Belt. During Late Pleistocene its activity was characterized by large domes grow and subsequent collapse emplacing large block and ash flow deposits, intercalated by Plinian eruptions. Morphological and paleoclimate studies at Nevado de Toluca and surroundi...
Article
Full-text available
A workshop entitled "Tracking and understanding volcanic emissions through cross-disciplinary integration: a textural working group" was held at the Université Blaise Pascal (Clermont-Ferrand, France) on the 6–7 November 2012. This workshop was supported by the European Science Foundation (ESF). The main objective of the workshop was to establish a...
Article
Full-text available
The Los Humeros Volcanic Complex (LHVC) is an important geothermal target in the Trans-Mexican Volcanic Belt. Understanding the structure of the LHVC and its influence on the occurrence of thermal anomalies and hydrothermal fluids is important to get insights into the interplay between the volcano-tectonic setting and the characteristics of the geo...
Article
We report the gamma ray fluctuations from downhole logging data obtained in the sediments of Lake Ohrid from 0 to 240 m below lake floor. These variations in gamma ray and potassium values strongly correlate with fluctuations in global δ18O values and can be thus considered a reliable proxy to depict glacial–interglacial cycles, with high clastic i...
Article
Full-text available
Nevado de Toluca volcano is one of the largest stratovolcanoes in the Trans-Mexican Volcanic Belt. During Late Pleistocene its activity was characterized by large domes grow and subsequent collapse emplacing large block and ash flow deposits, intercalated by Plinian eruptions. Morphological and paleoclimate studies at Nevado de Toluca and surroundi...
Article
Full-text available
Volcanic ash produced during explosive eruptions can have very severe impacts on modern technological societies. Here, we use reconstructed patterns of fine ash dispersal recorded in terrestrial and marine geological archives to assess volcanic ash hazards. The ash-dispersal maps from nine Holocene explosive eruptions of Italian volcanoes have been...
Conference Paper
Full-text available
New stratigraphic data allowed the reconstruction of the activity responsible of the construction of the Monte dei Porri cone. Alternating explosive and effusive activity, which emplaced fall and pyroclastic density current deposits, and lava flows, form the volcanic cone. The magma composition that fed the different phases of the Monte dei Porri e...
Article
Full-text available
The source conditions of volcanic plumes and collapsing fountains are investigated by means of large-scale experiments. In the experiments, gas-particle jets issuing from a cylindrical conduit are forced into the atmosphere at different mass flow rates. Dense jets (high particle volumetric concentration, e.g., C 0 > 0.01) generate collapsing founta...
Article
In this paper the role of time and late Pleistocene to middle Holocene climate changes in the Somma-Vesuvius volcano foothill (southern Italy) is investigated with a multidisciplinary approach. Four volcanic soils inter-layered between five well-known and well-dated primary tephra layers were characterized. Chronological constraints were provided b...
Article
Full-text available
The Scientific Collaboration on Past Speciation Conditions in Lake Ohrid (SCOPSCO) project is an international research initiative to study the influence of major geological and environmental events on the biological evolution of lake taxa. SCOPSCO drilling campaigns were carried out in 2011 and 2013. In 2011 we used gravity and piston coring at on...
Chapter
Here, a review of the geological methods used for constructing hazard maps at Somma–Vesuvius is presented. It deals with the description of methodology and stratigraphic data used for the construction of hazard maps for pyroclastic density currents and proximal and distal fallout of pyroclastic material.
Article
Full-text available
New data on the pyroclastic density current (PDC) deposit temperature ( T dep ) are provided for two prominent eruptions of Mexican volcanoes of the twentieth century: the 1982 eruption of El Chichón and the 1913 eruption of Colima. In spite of similar lithofacies, magma composition and pre-eruptive conditions, the T dep of the PDCs from the 1982 (...
Article
Full-text available
Volca´n de Colima is one of the most active volcanoes in Mexico. Several hazard maps have been published based on reconstruction of the Late Pleistocene–Holocene eruptive history and historical records for the last 400 years. Recent detailed published studies have improved the knowledge of the eruptive history of the volcano and proposed a new haza...
Article
Full-text available
The 74 (75) ka Toba eruption in Sumatra, Indonesia, is considered to be one of the largest volcanic events during the Quaternary. Tephra from the Toba eruption has been found in many terrestrial and marine sedimentary deposits, and acidity peaks related to the eruption have been used to synchronize ice core records from Greenland and Antarctica. Se...
Conference Paper
Full-text available
Rain–triggered lahars represent a very common and dangerous phenomenon at Volcán de Colima, with between 15 and 20 events occurring per year including some that generate major damage to infrastructure. These flows initiate on the upper slope of the cone above 2500 m a.s.l. and usually erode and entrain material to transform into debris flows that d...
Article
Full-text available
The 74 ka Toba eruption in Sumatra, Indonesia, is considered to be one of the largest volcanic events during the Quaternary. Tephra from the Toba eruption has been found in many terrestrial and marine sedimentary deposits, and acidity peaks related to the eruption have been used to synchronize ice core records from Greenland and Antarctica. Seismic...
Article
Here we report the recognition of the Minoan tephra layer in the Acigöl Basin (western Turkey), which represents the most eastward occurrence of this tephra on land and the first in continental deposits out of lacustrine sediments in mainland Turkey. The correlation is supported by glass and mineral geochemistry, which includes solution and laser‐a...
Article
Full-text available
Pyroclastic density currents (PDCs) are among the most amazing, complex and dangerous volcanic phenomena. They are moving mixtures of particles and gas that flow across the ground, and originate in different ways and from various sources, during explosive eruptions or gravity-driven collapse of domes. They may be short-lived (highly unsteady) or re...
Article
Full-text available
Here we report for the first time evidences of hydromagmatism at Colima volcano (western sector of Trans-Mexican Volcanic Belt). The studied location exposes 9 m of fine ash deposits dated at around 15 cal kyr BP by 14C measurement on organic matter collected at the very base of the stratigraphic succession. The ash deposits rest directly on the to...
Article
Full-text available
The presence of Late Pleistocene hexogen quartz-rich loess on Apennine massifs, formed by limestone rocks, has been reported since the 90s of the 20th century, and indicates that the dust must come from outside areas. The thickness of the aeolian deposits decrease from south to north, becoming null north of the latitude of 42° N; thus indicating th...
Article
Full-text available
A detailed tephrostratigraphic record, which dates back to Marine Isotope Stage (MIS) 5b (ca. 91 kyr), has been established from a 17.76 m long core (Co1215) from Lake Prespa (Macedonia, Albania and Greece). A total of eleven tephra and cryptotephra layers (PT0915-1 to PT0915-11) were identified, using XRF scanning, magnetic susceptibility measurem...
Article
Full-text available
Lake Ohrid shared by the Republics of Albania and Macedonia is formed by a tectonically active graben within the south Balkans and suggested to be the oldest lake in Europe. Several studies have shown that the lake provides a valuable record of climatic and environmental changes and a distal tephrostratigraphic record of volcanic eruptions from Ita...
Conference Paper
Generation and dispersal of volcanic ash during explosive eruptions can impact the environment at a serious level. Ashfall on natural waters and water supplies produces turbidity, induces pH variations and alters the natural concentrations of chemical elements. We present here a study on ash leachates carried out on different samples of volcanic as...
Conference Paper
Full-text available
Hydromagmatic pyroclasts are the product of explosive magma/water interaction, which produces thermo-hydraulic fragmentation of the magma. Thermo-hydraulic driven eruptions are usually responsible of fine ash generation, which is dispersed as fallout deposits and/or pyroclastic density currents (PDCs). The general term of hydromagmatism, or hydrovo...
Data
Full-text available
Lake Ohrid shared by the Republics of Albania and Macedonia is formed by a tectonically active graben within the South Balkan and suggested to be the oldest lake in Europe. Several studies have shown that the lake provides a valuable record of cli- 5 matic and environmental changes and a distal tephrostratigraphic record of volcanic eruptions from...
Data
Full-text available
Lake Ohrid shared by the Republics of Albania and Macedonia is formed by a tectonically active graben within the South Balkan and suggested to be the oldest lake in Europe. Several studies have shown that the lake provides a valuable record of cli- 5 matic and environmental changes and a distal tephrostratigraphic record of volcanic eruptions from...
Article
Full-text available
Lake Ohrid shared by the Republics of Albania and Macedonia is formed by a tectonically active graben within the South Balkan and suggested to be the oldest lake in Europe. Several studies have shown that the lake provides a valuable record of cli- 5 matic and environmental changes and a distal tephrostratigraphic record of volcanic eruptions from...