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127 results on '"Martorelli, Eleonora"'

111. Bathy-morphological setting of Terceira Island (Azores) after the FAIVI cruise

Author

Chiocci, F. L., Romagnoli, C., Casalbore, D., Sposato, A., Martorelli, Eleonora, Alonso, B., Casas, D., Conte, A. M., Di Bella, L., Ercilla, G., Estrada, Ferran, Falese, F., Farran, M., Forleo, V., Frezza, V., Hipolito, A., Lebani, A., Maisto, F., Pacheco, J., Pimentel, A., Quartau, Rui, Roque, C., Sampaio, I., Santoro, P. C., Tempera, Fernando, Chiocci, F. L., Romagnoli, C., Casalbore, D., Sposato, A., Martorelli, Eleonora, Alonso, B., Casas, D., Conte, A. M., Di Bella, L., Ercilla, G., Estrada, Ferran, Falese, F., Farran, M., Forleo, V., Frezza, V., Hipolito, A., Lebani, A., Maisto, F., Pacheco, J., Pimentel, A., Quartau, Rui, Roque, C., Sampaio, I., Santoro, P. C., and Tempera, Fernando

Abstract

High-resolution morpho-bathymetric data at 1:200,000 scale obtained during the FAIVI cruise (2011) and the resulting geomorphologic map of the Terceira island offshore area (central Azores, Portugal) are presented for the first time. The uneven morphology around Terceira is primarily related to volcanic features, such as linear and cone-shaped eruptive centres and lava flows. Such features are mostly concentrated on volcanic ridges and are aligned along preferential axes, suggesting a strong interaction between tectonics and volcanic processes. The occurrence of active tectonics is also demonstrated by systems of faults cutting the seafloor to the north, east and south of the island. Mapped erosive-depositional features include an insular shelf located at < 150 m water depth (wd), small landslide headwalls, erosive scarps, channelized features and crescent-shaped bedforms. The presented map may represent the base for a first-order geo-hazard assessment.

Published
2013
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121. Late Miocene to recent tectonic evolution of the Macquarie Triple Junction.

Author

Gasperini, Luca, Ligi, Marco, Accettella, Daniela, Bosman, Alessandro, Cuffaro, Marco, Lodolo, Emanuele, Martorelli, Eleonora, Muccini, Filippo, Palmiotto, Camilla, and Polonia, Alina

Abstract

The Pacific, Antarctic, and Macquarie lithospheric plates diverge from the Macquarie Triple Junction (MTJ) in the southwestern Pacific Ocean, south of Macquarie Island. Morphobathymetric, magnetic, and gravity data have been used to understand the evolution of the three accretionary/transform boundaries that meet at the MTJ. Plate velocities, estimated near the MTJ and averaged over the past 3 m.y., indicate an unstable ridge--fault--fault triple junction. The long life (>6 m.y.) of this configuration can be attributed to a rapid increase in spreading asymmetry along the Southeast Indian Ridge segment as it approaches the MTJ, and to transtension along the southernmost strand of the Macquarie--Pacific transform boundary. A major change in plate motion triggered the development of the Macquarie plate at ca. 6 Ma and makes clear the recent evolution of the MTJ, including (1) shortening of the Southeast Indian Ridge segment; (2) formation of the westernmost Pacific-Antarctic Ridge, which increased its length over time; and (3) lengthening of the two transform boundaries converging in the MTJ. The clockwise change of the Pacific-Antarctic motion (ca. 12--10 Ma) led to complex geodynamic evolution of the plate boundary to the east of the triple junction, with fragmentation of the long-offset Emerald transform fault and its replacement over a short time interval (1--2 m.y.) with closely spaced, highly variable transform offsets that were joined by short ridge segments with time-varying asymmetries in the spreading rates. [ABSTRACT FROM AUTHOR]

Published
2023
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124. Application of Hyperspectral Imaging to Underwater Habitat Mapping, Southern Adriatic Sea

Author

Alessandra Savini, Mariacristina Prampolini, Federica Foglini, Giovanni Chimienti, Lorenzo Angeletti, Valentina Grande, Cesare Corselli, Valentina Alice Bracchi, Giorgio Castellan, Agostino N. Meroni, Fabio Badalamenti, Marco Taviani, Fabio Marchese, Ingrid Myrnes Hansen, Magne Gudmundsen, Alessandra Mercorella, Eleonora Martorelli, Agostina Vertino, Ivar Erdal, Foglini F., Grande V., Marchese F., Bracchi V.A., Prampolini M., Angeletti L., Castellan G., Chimienti G., Hansen I.M., Gudmundsen M., Meroni A.N., Mercorella A., Vertino A., Badalamenti F., Corselli C., Erdal I., Martorelli E., Savini A., Taviani M., Foglini, F, Grande, V, Marchese, F, Bracchi, V, Prampolini, M, Angeletti, L, Castellan, G, Chimienti, G, Hansen, I, Gudmundsen, M, Meroni, A, Mercorella, A, Vertino, A, Badalamenti, F, Corselli, C, Erdal, I, Martorelli, E, Savini, A, and Taviani, M

Subjects
0106 biological sciences, Adriatic Sea, 010504 meteorology & atmospheric sciences, CORALLIGENOUS ASSEMBLAGES, habitat mapping, lcsh:Chemical technology, 01 natural sciences, Biochemistry, Article, CLASSIFICATION, hyperspectral camera, Analytical Chemistry, Mediterranean sea, SUBSTRATE, spectral library, TOOL, lcsh:TP1-1185, 14. Life underwater, Electrical and Electronic Engineering, Underwater, Instrumentation, Seabed, 0105 earth and related environmental sciences, Remote sensing, Canyon, geography, geography.geographical_feature_category, 010604 marine biology & hydrobiology, Hyperspectral imaging, MEDITERRANEAN SEA, cold-water coral, coralligenou, Ecotone, coralligenous, Atomic and Molecular Physics, and Optics, Habitat, Underwater habitat, ROV, Earth and Environmental Sciences, Environmental science
Abstract

Hyperspectral imagers enable the collection of high-resolution spectral images exploitable for the supervised classification of habitats and objects of interest (OOI). Although this is a well-established technology for the study of subaerial environments, Ecotone AS has developed an underwater hyperspectral imager (UHI) system to explore the properties of the seafloor. The aim of the project is to evaluate the potential of this instrument for mapping and monitoring benthic habitats in shallow and deep-water environments. For the first time, we tested this system at two sites in the Southern Adriatic Sea (Mediterranean Sea): the cold-water coral (CWC) habitat in the Bari Canyon and the Coralligenous habitat off Brindisi. We created a spectral library for each site, considering the different substrates and the main OOI reaching, where possible, the lower taxonomic rank. We applied the spectral angle mapper (SAM) supervised classification to map the areal extent of the Coralligenous and to recognize the major CWC habitat-formers. Despite some technical problems, the first results demonstrate the suitability of the UHI camera for habitat mapping and seabed monitoring, through the achievement of quantifiable and repeatable classifications.

Published
2019
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127. Treatise on Geomorphology

Subjects
Geomorphology
Abstract

Treatise on Geomorphology, Second Edition, Eleven Volume Set is organized into eleven volumes built on the outstanding success of the first edition. This comprehensive introduction to the large and diverse discipline of geomorphology provides a key reference tool for undergraduate geology students looking for term paper topics, graduate students starting a literature review for their thesis work, and for professionals seeking a concise summary of a particular topic. The tools available to understand geomorphology have greatly advanced in recent years, hence this new release will complement the work of a variety of professionals who are interested in topics such as GIScience, Remote Sensing and Karst. - Authoritative, authored and edited by recognized experts in the field, with a range of different expertise that ensures a high-quality standard for all chapters - Provides up-to-date information in a field that has seen significant progress in past years, including key advances in Remote Sensing and GIScience - Offers users a'one-stop', comprehensive resource for access to a wealth of information and critical summaries, thus bridging the gap between different specialties

Published
2022

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