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  • 1
    Electronic Resource
    Electronic Resource
    Earth's Rotation and Solar Activity (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical journal international 97 (1989), S. 0 
    Details
    ISSN: 1365-246X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The 11-yr signal in the variation of length of day has been successfully identified and significantly linked to solar activity. A physical mechanism involving meteorological and oceanic variation is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-246X.1989.tb00492.x
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  • 2
    Electronic Resource
    Electronic Resource
    Lunar and solar triggering of earthquakes
    Amsterdam : Elsevier
    Physics of the Earth and Planetary Interiors 59 (1990), S. 127-129 
    Details
    ISSN: 0031-9201
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0031-9201(90)90218-M
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  • 3
    Electronic Resource
    Electronic Resource
    The Seismicity in the Southern Tyrrhenian Area and its Neural Forecasting (2000)
    Springer
    Pure and applied geophysics 157 (2000), S. 343-355 
    Details
    ISSN: 1420-9136
    Keywords: Key Words: Southern Tyrrhenian basin, nonlinear dynamics, artificial neural networks.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract —The Southern Tyrrhenian basin is a region characterized by complex tectonics and large-scale geodynamic deformations, and its seismicity has been recently recognized as following fractal laws in its five dimensional set (magnitude, time and space). In particular, the time occurrences of earthquakes are found to follow a significant fractal clustering within the interval ranging from 16 minutes to 24 hours; for longer intervals, the time clustering regime was not significantly different from that of a random process. An artificial neural network is applied here to the same seismicity data set and further evidence of the nonlinear dynamic process, for which the fractal approach failed, is obtained. The monthly values of magnitude predicted by extrapolation are found to be in fair agreement with the historical data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000240050003
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  • 4
    Electronic Resource
    Electronic Resource
    Local recent changes in extreme air temperature (1984)
    Springer
    Climatic change 6 (1984), S. 303-309 
    Details
    ISSN: 1573-1480
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Daily minimum and maximum air temperatures recorded in Naples (1872–1982) and in surrounding areas have been analysed in order to set up a statistical model for investigating climatic changes of extreme air temperature. We have analysed on various time-scales the mean values of minimum air temperature lower than the 10th percentile (Tmin10) and the mean values of the maximum air temperature greater than the 90th percentile (Tmax90). The results have shown for the city: (i) a significant secular trend both for yearly Tmin10 and Tmax90, mostly due to the process of urbanization, that is also responsible for (ii) the ascertained change in the character of the annual cycle, (iii) a reasonable ability to forecast winter Tmin10 and summer Tmax90 in statistical terms using a markovian model, and (iv) a significant 11-yr cycle with an amplitude of 0.5 °C directly related to solar activity which has never been succesfully determined before.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00142478
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  • 5
    Electronic Resource
    Electronic Resource
    The lunar nodal induced-signal in climatic and oceanic data over the Western Mediterranean area and on its bistable phasing (1994)
    Springer
    Theoretical and applied climatology 50 (1994), S. 93-102 
    Details
    ISSN: 1434-4483
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary A highly significant lunar nodal tidal term has been obtained in climatic (atmospheric pressure, rainfall, evaporation, river discharge, air temperature) and oceanic (sea surface temperature, mean sea level) data from the Western Mediterranean area. Analysis of the waveforms for the examined parameters shows a sudden switch of phase at the turn of the century. A physical explanation for both the origin and the characteristics of the obtained waves is proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00864906
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  • 6
    Electronic Resource
    Electronic Resource
    Solar Activity and Algal-bloom Occurrences in the Northern Adriatic Sea: Geomagnetic Connection (1998)
    Springer
    Theoretical and applied climatology 59 (1998), S. 129-134 
    Details
    ISSN: 1434-4483
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The high-speed particle flux (solar wind) escaping from the Sun controls the geomagnetic activity at middle latitudes. The latter is found to be negatively correlated to the difference of atmospheric pressure between January and April averaged out in the area of the Northern Adriatic. This difference is again related to the water volume flowing from the South into the Northern Adriatic Sea and is a necessary (though not sufficient) condition for the occurrence of strong algal-blooms in summer. A physical model involving geomagnetic activity, mean atmospheric pressured difference between latitude 35 °N and 55 °N in the European area and atmospheric pressure difference from winter to spring in the Northern Adriatic basin is proposed. The possibility of predicting the long-term variations of geomagnetic activity allows one to obtain long-term predictions of winter minus spring pressure and therefore indications of the risk of strong summer-time algal-bloom episodes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007040050018
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  • 7
    Electronic Resource
    Electronic Resource
    The 11-yr ozone modulation of extreme surface air temperatures (1989)
    Springer
    Theoretical and applied climatology 40 (1989), S. 155-160 
    Details
    ISSN: 1434-4483
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Zusammenfassung Der umgekehrte Effekt des gesamten Ozons auf die Tagesmaxima und -minima der Lufttemperatur ist einer der Gründe für die mißglückte Korrelation zwischen Sonnenaktivität und Oberflächenlufttemperatur, wie sie bis jetzt aus Tagesmittelwerten ermittelt wurde. Die sonnenabhängige Fluktuation im atmosphärischen Gesamtozon erwies sich als Ursache der genannten Korrelation zwischen Sonnenaktivität und täglichen Maxima und Minima der Lufttemperaturen andererseits. Damit wird darauf hingewiesen, daß Ozon als stratosphärischer Absorber sowohl für die tagsüber einfallende sichtbare Sonnenstrahlung als auch für die nächtliche, rücktransferrierte Erdinfrarotabstrahlung wirkt.
    Notes: Summary The opposite effect of the total ozone on daily maximum and minimum air temperatures is one of the reasons for the failure of the correlation between solar activity and surface air temperature by means of mean daily values. The solar-related fluctuations in the atmospheric total ozone are found to be responsible for the observed correlations between solar activity and separately daily maximum and minimum air temperatures. The present evidence indicates that ozone serves as a stratospheric shutter modulating both the incoming daytime visible solar energy flux and the Earth's night-time upward infrared radiation transferred downward.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00866178
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  • 8
    Electronic Resource
    Electronic Resource
    Rainfall fluctuations over Italy and their association with solar activity (1992)
    Springer
    Theoretical and applied climatology 45 (1992), S. 201-207 
    Details
    ISSN: 1434-4483
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary Selected records from hundreds of raingauges located along the river basins of the largest Italian rivers, throughout the whole of Italy, show a fairly similar interannual variability. Analysis of the historical time series of these data determined very significant 11-yr, 22-yr and 44-yr variabilities that are possibly linked to coherent fluctuations in the high-speed solar wind precipitation into the atmosphere. The combined effect of such signals is found to explain 60% of the yearly rainfall variance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00866193
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  • 9
    Electronic Resource
    Electronic Resource
    Fractal Characterisation of Geophysical Measuring Networks and its Implication for an Optimal Location of Additional Stations: An Application to a Rain-Gauge Network (2000)
    Springer
    Theoretical and applied climatology 65 (2000), S. 157-163 
    Details
    ISSN: 1434-4483
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The locations of measuring stations are often inhomogeneously distributed in space, possibly because of both geophysical interests and access problems. The areal inhomogeneity of a network can be well characterised by its fractal dimension, that is an index ranging progressively from 0 (when all stations are distributed on a single point or on isolated points) to 2 (when all stations are uniformly distributed). Appreciating the scaling region, inside which the station-co-ordinates are fractally distributed, provides valuable information both on the minimum detectable scale and on the minimum resolvable dimension. The increase in the measuring capability of a network must occur through its strategic enlargement resulting in a compromise between the fractal dimension increase and local topographic necessities. An application to a rain-gauge network belonging to the Naples Section of the Italian Hydrographic Service is reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007040070040
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  • 10
    Electronic Resource
    Electronic Resource
    Multifractal Dynamic Rainfall Processes in Italy (1999)
    Springer
    Theoretical and applied climatology 63 (1999), S. 73-78 
    Details
    ISSN: 1434-4483
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary  Historical daily rainfall events, measured at different Italian stations, are found to follow fractal relationships within specific time ranges. It is found that the fractal dimension D describes the strength of the clustering of daily rainfall events in a more realistic way than the commonly used number of daily rainfall events: the more isolated the clusters, the smaller the value of D. The large dependence of D and of the specific scaling region on the threshold intensity is an indication of a more complex property of the rainfall called multifractality: a large-scale rain-field is successively broken into smaller and smaller eddies, each receiving an amount of the total field specified by a multiplicative parameter. Circumstantial evidence indicates, moreover, that the significant secular decreases of D over the Mediterranean area can be reasonably related to the simultaneous coherent decrease of zonal atmospheric circulation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007040050093
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