http://hdl.handle.net/2122/230 Search the Channel search http://www.earth-prints.org/simple-search http://hdl.handle.net/2122/4071 Title: Are we going towards a global planetary magnetic change? <br/> <br/>Authors: De Santis, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Qamili, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia <br/> <br/>Editors: De Santis, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Baker, R.; Israel Institute of Technology, Israel; Klug, B.; Univ. of Natural Res. & Applied Life Sciences, Austria; Vanicek, P.; University of New Brunswick, Canada; D'El-Rey Silva, L. J. H.; Universidade de Brasilia, Brazil; Foyo, A.; University of Cantabria, Spain; Ercanoglu, M.; Hacettepe University, Turkey; Dordevic, D.; University of Belgrade, Serbia <br/> <br/>Abstract: The dipolar part of the geomagnetic field has been decaying rapidly during the last few hundreds of years. In addition to this classical argument, from Information theory applied to geomagnetism, there are some evidences that the recent Earth magnetic field is showing characteristics typical of a reversal in progress. If this is true, many scientific and environmental questions will arise. For instance, it will be of particular interest to monitor the time-space dynamics the South Atlantic Anomaly, where the magnetic field is strongly reduced (a sort of "planetary magnetic hole"). Here we find one of the most favourite places where Low Earth Orbiting (LEO) satellites are lost or present some damages, due to the vicinity of "clouds" of electric particles (Van Allen belts) to the Earth's surface. The decay of the field will also decrease the screening effect to the solar wind and cosmic charges, so enhancing the cosmic radiation illuminating our planet: possible negative consequences are expected in terms of increase of skin cancers. Also important will be the study of the possible evolution of the core dynamics that will be generating this specific condition of the geomagnetic field. http://hdl.handle.net/2122/4070 Title: Environment and Geoscience <br/> <br/>Authors: De Santis, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Baker, R.; Israel Institute of Technology, Israel; Klug, B.; Univ. of Natural Res. & Applied Life Sciences, Austria; Vanicek, P.; University of New Brunswick, Canada; D'El-Rey Silva, L. J. H.; Universidade de Brasilia, Brazil; Foyo, A.; University of Cantabria, Spain; Ercanoglu, M.; Hacettepe University, Turkey; Dordevic, D.; University of Belgrade, Serbia <br/> <br/>Editors: De Santis, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Baker, R.; Israel Institute of Technology, Israel; Klug, B.; Univ. of Natural Res. & Applied Life Sciences, Austria; Vanicek, P.; University of New Brunswick, Canada; D'El-Rey Silva, L. J. H.; Universidade de Brasilia, Brazil; Foyo, A.; University of Cantabria, Spain; Ercanoglu, M.; Hacettepe University, Turkey; Dordevic, D.; University of Belgrade, Serbia <br/> <br/>Abstract: This book contains the proceedings of the 1st WSEAS International Conference on Environmental and Geological Science and Engineering (EG'08) which was held in Malta, September 11-13, 2008. This conference aims to disseminate the latest research and applications in Renewable Energy, Mineral Resources, Natural Hazards and Risks, Environmental Impact Assessment, Urban and Regional Planning Issues, Remote Sensing and GIS, and other relevant topics and applications. The friendliness and openness of the WSEAS conferences, adds to their ability to grow by constantly attracting young researchers. The WSEAS Conferences attract a large number of well-established and leading researchers in various areas of Science and Engineering as you can see from http://www.wseas.org/reports. Your feedback encourages the society to go ahead as you can see in http://www.worldses.org/feedback.htm The contents of this Book are also published in the CD-ROM Proceedings of the Conference. Both will be sent to the WSEAS collaborating indices after the conference: www.worldses.org/indexes In addition, papers of this book are permanently available to all the scientific community via the WSEAS E-Library. Expanded and enhanced versions of papers published in this conference proceedings are also going to be considered for possible publication in one of the WSEAS journals that participate in the major International Scientific Indices (Elsevier, Scopus, EI, ACM, Compendex, INSPEC, CSA .... see: www.worldses.org/indexes) these papers must be of high-quality (break-through work) and a new round of a very strict review will follow. (No additional fee will be required for the publication of the extended version in a journal). WSEAS has also collaboration with several other international publishers and all these excellent papers of this volume could be further improved, could be extended and could be enhanced for possible additional evaluation in one of the editions of these international publishers. Finally, we cordially thank all the people of WSEAS for their efforts to maintain the high scientific level of conferences, proceedings and journals. http://hdl.handle.net/2122/3916 Title: Fluid motions in the Earth’s core inferred from time spectral features of the geomagnetic field <br/> <br/>Authors: Consolini, G.; Istituto di Fisica dello Spazio Interplanetario, CNR, I-00133 Roma, Italy; De Michelis, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; Meloni, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia <br/> <br/>Abstract: The aim of this work is to investigate the time spectral features of the main geomagnetic field fluctuations as measured on the Earth’s surface in connection with a nontraditional turbulent dynamics of the fluid motions in the outer layers of the Earth’s liquid core. The average geomagnetic field spectrum is found to be a power law, characterized by a spectral exponent α≈−11/3, on time scales longer than 5 yr. We discuss the spectral exponent in connection with an intense magnetic field in the Earth’s core and with a vortex coalescence process in a regime of drift-wave turbulence. http://hdl.handle.net/2122/2629 Title: Il nucleo terrestre: il cuore magnetico della Terra <br/> <br/>Authors: De Santis, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia <br/> <br/>Abstract: Il campo magnetico terrestre è una proprietà intrinseca del nostro pianeta e di altri oggetti del sistema solare. Il Sole stesso possiede un forte campo magnetico che si inverte quasi ciclicamente ogni 10-11 anni; tale comportamento è visibile attraverso la medesima ciclicità delle macchie solari che denotano sulla superficie l’intensa attività magnetica della nostra stella. Il campo magnetico terrestre è importantissimo per la vita sulla Terra. Esso protegge il pianeta dalle particelle cariche provenienti dal Sole: con la sua presenza si oppone alla forza di questo vento solare che altrimenti spazzerebbe via gran parte dell’atmosfera terrestre, così come probabilmente è già avvenuto in passato con l’atmosfera di Marte.