Variations of Temperature and Precipitation in Italy from 1866 to 1995 |
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Authors: | M Brunetti M Maugeri T Nanni |
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Institution: | (1) Istituto ISAO-CNR, Bologna, Italy, IT;(2) Istituto di Fisica Generale ed Applicata, Milano, Italy, IT |
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Abstract: | Summary Series of annual and seasonal temperature and precipitation representing respectively northern and southern Italy are compared
for trend, interannual variability and periodicity in the period 1866–1995. Temperature and precipitation trends are almost
always anticorrelated except in winter in the North where an anomalous behavior is evident till about 1980. The result is
that the Italian climate has become warmer and drier especially in the South since about 1930.The interannual variability
does not present significant maxima, but only minima that cannot be related tothe start of a trend either for temperature
or for precipitation. The power spectra of the series show broad significant peaks containing the quasi-biennial oscillation
and other well known periodicities probably due to solar cycles or to the North Atlantic ocean-atmosphere oscillation (NAO).
Received December 16, 1998 Revised October 21, 1999 |
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