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Coupled Decadal Variability of the North Atlantic Oscillation, Regional Rainfall and Karst Spring Discharges in the Campania Region (Southern Italy) : Volume 16, Issue 5 (11/05/2012)

By De Vita, P.

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Book Id: WPLBN0004010394
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File Size: Pages 11
Reproduction Date: 2015

Title: Coupled Decadal Variability of the North Atlantic Oscillation, Regional Rainfall and Karst Spring Discharges in the Campania Region (Southern Italy) : Volume 16, Issue 5 (11/05/2012)  
Author: De Vita, P.
Volume: Vol. 16, Issue 5
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Fabbrocino, S., Manna, F., Allocca, V., & Vita, P. D. (2012). Coupled Decadal Variability of the North Atlantic Oscillation, Regional Rainfall and Karst Spring Discharges in the Campania Region (Southern Italy) : Volume 16, Issue 5 (11/05/2012). Retrieved from http://hawaiilibrary.net/


Description
Description: Dipartimento di Scienze della Terra – University of Naples Federico II, Italy. Thus far, studies on climate change have focused mainly on the variability of the atmospheric and surface components of the hydrologic cycle, investigating the impact of this variability on the environment, especially with respect to the risks of desertification, droughts and floods. Conversely, the impacts of climate change on the recharge of aquifers and on the variability of groundwater flow have been less investigated, especially in Mediterranean karst areas whose water supply systems depend heavily upon groundwater exploitation.

In this paper, long-term climatic variability and its influence on groundwater recharge were analysed by examining decadal patterns of precipitation, air temperature and spring discharges in the Campania region (southern Italy), coupled with the North Atlantic Oscillation (NAO).

The time series of precipitation and air temperature were gathered over 90 yr, from 1921 to 2010, using 18 rain gauges and 9 air temperature stations with the most continuous functioning. The time series of the winter NAO index and of the discharges of 3 karst springs, selected from those feeding the major aqueducts systems, were collected for the same period.

Regional normalised indexes of the precipitation, air temperature and karst spring discharges were calculated, and different methods were applied to analyse the related time series, including long-term trend analysis using smoothing numerical techniques, cross-correlation and Fourier analysis.

The investigation of the normalised indexes highlighted the existence of long-term complex periodicities, from 2 to more than 30 yr, with differences in average values of up to approximately ±30% for precipitation and karst spring discharges, which were both strongly correlated with the winter NAO index.

Although the effects of the North Atlantic Oscillation (NAO) had already been demonstrated in the long-term precipitation and streamflow patterns of different European countries and Mediterranean areas, the results of this study allow for the establishment of a link between a large-scale atmospheric cycle and the groundwater recharge of carbonate karst aquifers. Consequently, the winter NAO index could also be considered as a proxy to forecast the decadal variability of groundwater flow in Mediterranean karst areas.


Summary
Coupled decadal variability of the North Atlantic Oscillation, regional rainfall and karst spring discharges in the Campania region (southern Italy)

Excerpt
Allocca, V., Celico, F., Celico, P., De Vita, P., Fabbrocino, S., Mattia, S., Monacelli, G., Musilli, I., Piscopo, V., Scalise, A. R., Summa, G., and Tranfaglia, G.: Illustrative Notes of the Hydrogeological Map of Southern Italy, Istituto Poligrafico e Zecca dello Stato, ISBN 88-448-0215-5, 1–211, 2007.; Allocca, V., Celico, F., Celico, P., De Vita, P., Fabbrocino, S., Mattia, C., Monacelli, G., Musilli, I., Piscopo, V., Scalise, A. R., Summa, G., and Tranfaglia, G.: La carta idrogeologica dell'Italia meridionale. Metodi ed analisi territoriali per l'identificazione e la caratterizzazione dei corpi idrici sotterranei (Direttiva 2000/60/CE), L'ACQUA, 4, 21–32, 2009 (in Italian).; Bandini, A.: Tipi pluviometrici dominanti sulle regioni italiane, Il Servizio Idrografico Italiano. Ministero dei Lavori Pubblici, Roma, 1931 (in Italian).; Barnston, A. G. and Livezey, R. E.: Classification, Seasonality, and Persistence of Low-Frequency Atmospheric Circulation Patterns, Mon. Weather Rev., 115, 1083–1126, 1987.; Bartolini, E., Claps, P., and D'Odorico, P.: Interannual variability of winter precipitation in the European Alps: relations with the North Atlantic Oscillation, Hydrol. Earth Syst. Sci., 13, 17–25, doi:10.5194/hess-13-17-2009, 2009.; Brunetti, M., Maugeri, M., and Nanni, T.: Variations of temperature and precipitation in Italy from 1866–1995, Theor. Appl. Climatol., 65, 165–174, 2000.; Boni, C., Bono, P., and Capelli, G.: Valutazione quantitativa dell'infiltrazione efficace in un bacino dell'Italia centrale: confronto con analoghi bacini rappresentativi di diversa litologia, Geologia Applicata e Idrogeologia, 17, 437–452, 1982.; Brandimarte, L., Di Baldassarre, G., Bruni, G., D'Odorico, P., and Montanari, A.: Relation Between the North-Atlantic Oscillation and Hydroclimatic Conditions in Mediterranean Areas, Water Resour. Manage., 25, 1269–1279, 2011.; Brunetti, M., Maugeri, M., Monti, F., and Nanni, T.: Temperature and precipitation variability in Italy in the last two centuries from homogenized instrumental time series, Int. J. Climatol., 26, 345–381, 2006.; Hurrell, J. W. and van Loon, H.: Decadal variations in climate associated with the North Atlantic Oscillation, Climatic Change, 36, 301–326, 1997.; Caloiero, T., Coscarelli, R., Ferrari, E., and Mancini, M.: Precipitation change in Southern Italy linked to global scale oscillation indexes, Nat. Hazards Earth Syst. Sci., 11, 1683–1694, doi:10.5194/nhess-11-1683-2011, 2011.; Cambi, C. and Dragoni, W.: Groundwater, recharge variability and climatic changes: some consideration out of the modeling of an Apenninic spring, Hydrogeology, 4, 11–25, 2000.; Celico, F. and Mattia, C.: Analisi degli effetti indotti dal sisma del 23/11/1980 sugli equilibri idrogeologici della sorgente Sanità (Campania), mediante simulazione ragionata delle dinamiche di ricarica e esaurimento, Quaderni di Geologia Applicata, 1, 5–18, 2002 (in Italian).; Celico, F., Celico, P., De Vita, P., and Piscopo, V.: Groundwater flow and protection in the Southern Apennines (Italy), Hydrogéologie, 4, 39–47, 2000.; Celico, F., Naclerio, G., Bucci, A., Nerone, V., Capuano, P., Carcione, M., Allocca, V., and Celico, P.: Influence of pyroclastic soil on epikarst formation: a test study in southern Italy, Terra Nova, 22, 110–115, 2010.; Celico, P.: Schema idrogeologico dell'Appennino carbonatico centro-meridonale, Memorie e Note Istituto di Geologia Applicata, Napoli, 14, 1–97, 1978 (in Italian).; Celico, P.: Relazioni tra idrodinamica sotterranea e terremoti in Irpinia (Campania), Rendiconti Società Geologica Italiana, 4, 103–108, 1981 (in Italian).; Celico, P.: Idrogeologia dei massicci carbonatici, delle piane quaternarie e delle aree vulcaniche dell'Italia centro-meridionale (Marche e Lazio meridionale, Abruzzo, Molise e Campania), Quaderni della Cassa per il Mezzogiorno, 4/2, 1–

 

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