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Caputo R.,University of Ferrara | Caputo R.,Research and Teaching Center for Earthquake Geology | Sboras S.,National Center for Environment and Sustainable Development | Pavlides S.,Research and Teaching Center for Earthquake Geology | And 3 more authors.
Earth-Science Reviews | Year: 2015

When compiling a database of active and capable faults, or more in general when collecting data for Seismic Hazard Assessment (SHA) purposes, the exploitation of the numerous and different sources of information represents a crucial issue. Also the understanding of their potential and limitations is essential. For example, using only information deriving from historically and/or instrumentally recorded earthquakes, as it has been commonly applied in the past, it is not sufficient and it could be, sometimes, even misleading in terms of SHA. In the present paper, the importance of using geological information for better defining the principal seismotectonic parameters of a seismogenic source is discussed and emphasized. In order to show this, four case studies of active faults recently reactivated by strong earthquakes have been selected from the Greek Database of Seismogenic Sources (GreDaSS). Each seismogenic source is analysed twice and separately for the two sources of information: firstly, on the basis of the single-event effects as mainly provided by historically or instrumentally recorded data, and secondly, on the basis of the cumulative effects consisting of any, mainly geological, evidence caused by multiple and repeated fault reactivations of the specific seismogenic source. The quality and accuracy of the produced results from both sources of information are then discussed in order to define the reliability of the outcomes and especially for calibrating the methodological approaches based on geological data, which have not only an intrinsically different degree of uncertainty and resolution, but also a greater potential in exploitability. As a matter of fact, an improved geological, in its broader sense, knowledge will help to fill in the gap of the geodetically and/or seismologically determined tectonic activity of hazardous regions. Moreover, including in a catalogue also the seismogenic sources that are not associated with historical and/or instrumental earthquakes will have a remarkable impact in future SHA analyses either probabilistic or deterministic ones. © 2015 Elsevier B.V. Source


Dimitroulopoulou C.,National Center for Environment and Sustainable Development | Dimitroulopoulou C.,University of Macedonia | Ziomas I.,National Center for Environment and Sustainable Development | Ziomas I.,National Technical University of Athens
Energy Policy | Year: 2011

This paper analyses the factors affecting greenhouse gas (GHG) emissions in Greece, (i.e. the drivers of pressures on climate change), using environmental indicators related to energy, demographics and economic growth. The analysis is based on the data of 2008 and considers types of fuel and sectors. The Kaya identity is used to identify the relationship between drivers and pressures, using annual time series data of National GHG emissions, population, energy consumption and gross domestic product. The analysis shows that over the period 2000-2008, GHG emissions show a slight variation, but they are almost stabilised, with a total increase of 1.6%. Despite the economic growth over that period, this stabilisation may be considered as a combination of reductions in the energy intensity of GDP and the carbon intensity of energy, which are affected by improvements in energy efficiency and introduction of "cleaner" fuels, such as natural gas and renewables in the energy mixture of the country. © 2011 Elsevier Ltd. Source


Dimitroulopoulou C.,National Center for Environment and Sustainable Development | Dimitroulopoulou C.,University of Macedonia | Plemmenos V.,National Center for Environment and Sustainable Development | Kyrios T.,National Center for Environment and Sustainable Development | And 2 more authors.
Atmospheric Environment | Year: 2011

The European Environment Agency (EEA) calculates the air pollution exposure indicator (CSI 004) for Greece using data from only one monitoring station, which is located in Athens. The present work presents an alternative approach for calculating such an indicator. This new approach is based on data from several monitoring stations in the metropolitan areas of Athens and Thessaloniki and takes into account the population living within a particular monitoring district. The assessment focuses on particulate matter (PM10), nitrogen dioxide and ozone for the period from 2001-2008. Comparisons between exposures estimated by the current procedure and those estimated by the EEA methodology indicate that the latter procedure can produce large over-estimates of exposure. © 2011 Elsevier Ltd. Source

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