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Estimating local records for Northern and Central Italy from a sparse secular temperature network and from 1961–1990 climatologies

Author(s): M. Brunetti | G. Lentini | M. Maugeri | T. Nanni | C. Simolo | J. Spinoni

Journal: Advances in Science and Research
ISSN 1992-0628

Volume: 3;
Start page: 63;
Date: 2009;
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The paper presents monthly 30-arc-second-resolution Northern and Central Italy temperature climatologies and discusses the procedure we adopt to superimpose the information of temperature secular records onto these climatologies. The climatologies are obtained by means of a step-wise linear regression method which aims at determining the temperature dependence on geographical and morphological variables. Such a method is applied to a database of about 800 monthly 1961–1990 temperature normals. In the first regression (temperature vs. elevation) the recorded data are considered; the further regressions concern the residuals obtained after taking into account the effect of each variable, in order of importance. An estimated secular anomaly record can be obtained for each point of the climatology grid by means of a distance-weighted average of the temperature anomaly records of the stations surrounding the grid point.
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