study analyses thirteen daily precipitation series of Piedmont, region of
The meteorological series have been chosen because they were meteorological
observatories operating continuously from the beginning of 1900 until 2011. As
the first step an historical research over each station has been carried out.
In this way, the potential breaks, in the series, either due to changes of
locations or instruments, have been determined and the missing values have been
recovered. On the precipitation daily series a quality control have been
effectuated and by metadata identification it was possible to assess the
homogeneity of the meteorological series. In this way we have obtained the
complete and correct series on which trends have been computed. In order to
better understand the consequences of climate variations on our environment and
society, we have calculated the climate indices proposed by “CCL/CLIVAR Working
Group on Climate Change Detection” (dry and wet days, rainy days, intensity of
precipitation…) over the time. The values of precipitation have also allowed beginning
the climatic analysis with the aim at defining the principle local peculiarity
Cite this paper
Acquaotta, F. and Fratianni, S. (2013) Analysis on Long Precipitation Series in Piedmont (North-West Italy). American Journal of Climate Change, 2, 14-24. doi: 10.4236/ajcc.2013.21002.
 H. Diaz, R. Bradley and J. Eischeid, “Precipitation Fluc tuation over Global Land Areas since the Late 1800s,” Journal of Geophysical Research, Vol. 94, No. D1, 1989, pp. 1195-1240. doi:10.1029/JD094iD01p01195
 A. Dai, I. Fung and A. Del Genio, “Surface Observed Land Precipitation Variations during 1900-88,” Journal of Climate, Vol. 10, No. 11, 1997, pp. 2943-2961.
 M. New, M. Todd, M. Hulme and P. Jones, “Review Precipitation Measurements and Trends in the Twentieth Century,” International Journal of Climatology, Vol. 21, No. 15, 2001, pp. 1899-1922. doi:10.1002/joc.680
 J. Gonzalez Lez Rouco, L. Jimenez, V. Quesada and F. Valero, “Quality Control and Homogeneity of Precipitation Data in the Southwest of Europe,” Journal of Climate, Vol. 14, No. 5, 2001, pp. 964-978.
 R. Bradley, H. Diaz, J. Eischeid, P. Jones, P. Kelly and C. Goodes, “Precipitation Fluctuations over Northern Hemi sphere Land Areas since the Mid-19th Century,” Science, Vol. 237, No. 4811, 1987, pp. 171-175.
 J. Schmidll, C. Schmutz, C. Frei, H Wanner and C. Schar, “Mesoscale Precipitation Variability in the Region of the European Alps during the 20th Century,” International Journal of Climatology, Vol. 22, No. 9, 2002, pp. 1049 1074. doi:10.1002/joc.769
 I. Auer and R. Bohm, “Combined Temperature-Precipitation Variations in Austria during the Instrumental Period,” Theoretical and Applied Climatology, Vol. 49, No. 3, 1994, pp. 161-174. doi:10.1007/BF00865531
 M. L. Widmann and C. Schar, “A Principal Component and Long-Term Trend Analysis of Daily Precipitation in Switzerland,” International Journal of Climatology, Vol. 17, No. 12, 1997, pp. 1333-1356.
 L. Buffoni, M. Maugeri and T. Nanni, “Precipitation in Italy from 1833 to 1996,” Theoretical and Applied Climatology, Vol. 63, No. 1-2, 1999, pp. 33-40.
 T. Karl, R. Knight and N. Plummer, “Trends in the High Frequency Climate Variability in the Twentieth Century,” Nature, Vol. 377, 1995, pp. 217-220.
 WMO “Guide to Climatological Practices Draft,” Third Edition, 2007.
 M. G. Klein Tank, J. Wijngaard, G. K?nnen, R. B?hm, G. Demarée, A. Gocheva, M. Mileta, S. Pashiardis, L. Hejkrlik, C. Kern-Hansen, R. Heino, P. Bessemoulin, G. Müller-Westermeier, M. Tzanakou, S. Szalai, T. Pálsdót tir, D. Fitzgerald, S. Rubin, M. Capaldo, M. Maugeri, A. Leitass, A. Bukantis, R. Aberfeld, A. Van Engelen, E. Forland, M. Mietus, F. Coelho, C. Mares, V. Razuvaev, E. Nieplova, T. Cegnar, J. Antonio López, B. Dahlstr?m, A. Moberg, W. Kirchhofer, A. Ceylan, O. Pachaliuk, L. Ale xander and P. V. Petrovic, “Daily Dataset of 20th-Cen tury Surface Air Temperature and Precipitation Series for European Climate Assessment,” International Journal of Climatology, Vol. 22, No. 12, 2002, pp. 1441-1453.
 A. M. Klein Tank and G. P. Konnen, “Trends in Indices of Daily Temperature and Precipitation Extremes in Europe, 1946-99,” Journal of Climate, Vol. 16, No. 22, 2003, pp. 3665-3680.
 A. Moberg and P. Jones, “Trends in Indices for Extremes in Daily Temperature and Precipitation in Central and Western Europe, 1901-99,” International Journal of Climatology, Vol. 25, No. 9, 2005, pp. 1149-1171.
 M. Brunetti, L. Buffoni, M. Maugeri and T. Nanni, “Precipitation Intensity Trends in Northern Italy,” International Journal of Climatology, Vol. 20, No. 9, 2000, pp. 1017-1031.
 X. Zhang and F. Yang, “RClimDex (1.0),” ETCCDI/CRD Climate Change Indices, 2004.
 J. Wijngarard, A. Klein Thank and G. Konnen, “Homo geneity of 20th Century European Daily Temperature and Precipitation Series,” International Journal of Climatol ogy, Vol. 23, No. 6, 2003, pp. 679-692.
 Expert Team for Climate Change Detection Monitoring and Indices (ETCCDMI), CCI/CLIVAR First Team Meeting Report, Zuckerman Inst/Clim. Res. Unit Aguilar E. Univ., Norwick, 2003.
 D. Wilks, “Statistical Methods in the Atmospheric Sciences,” 2nd Edition, International Geophysics Series, Elsevier, 2006.
 A. Biancotti, G. Bellardone, S. Bovo, B. Cagnazzi, L. Giacomellli and C. Marchisio, “Distribuzione Regionale di Piogge e Temperature,” Collana Studi Climatologici in Piemonte, Vol. 1, Torino, 1998.
 F. Bagnouls and H. Gaussen, “Saison Sèche et Indice Xérothermique,” Bulletin de la Societe. D’Histoire. Na turelle, Toulose, Vol. 88, 1953, pp. 193-239.
 M. Pinna and S. Vittorini, “Contributo Alla Determina zione dei Regimi Pluviometrici in Italia,” In Contributi di climatologia. Memoria Sococietà Geografica, Vol. 39, 1985, pp. 147-168.
 IPCC, “Climate Change 2007: The Physical Science Basis,” Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change Solomon, 2007.
 I. T. Jolliffe, “Principal Component Analysis,” 2nd Edition, Springer, Berlin, 2002.
 J. W. Hurrel and H. Van Loon, “Decadal Variations in Climate Associated with the North Atlantic Oscillation,” Climate Change, Vol. 36, No. 3-4, 1997, pp. 301-326.
 F. Acquaotta, S. Fratianni, C. Cassardo and R. Cremonini, “On the Continuity and Climatic Variability of the Meteorological Stations in Torino, Asti, Vercelli and Oropa,” Meteorological and Atmospheric Physics, Vol. 103, No. 1-4, 2009, pp. 279-287. doi:10.1007/s00703-008-0333-4