Towards soil water scarcity? An exploratory time-series analysis of the aridity index in Castelporziano forest, Rome

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• 作者：Luca Salvati ; Valerio Moretti ; Marco Zitti ; Carlotta Ferrara
• 关键词：Drought ; Climate anomaly ; Spectral analysis ; Coastal area ; Mediterranean region
• 刊名：Rendiconti Lincei
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：26
• 期：3-supp
• 页码：289-295
• 全文大小：859 KB
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• 作者单位：Luca Salvati (1)
  Valerio Moretti (1) (2)
  Marco Zitti (1) (3)
  Carlotta Ferrara (1)
  
  1. Consiglio per la Ricerca in Agricoltura e l′analisi dell′economia agraria (CRA), Via della Navicella 2-4, 00184, Rome, Italy
  2. Accademia Nazionale delle Scienze detta dei XL, Rome, Italy
  3. Consiglio per la Ricerca in Agricoltura e l′analisi dell′economia agraria (CRA), Via del Caravita 7a, 00186, Rome, Italy
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Life Sciences
  Biomedicine
  History of Science
  
• 出版者：Springer Milan
• ISSN：1720-0776

文摘

A month time series of the Aridity Index (AI) was analyzed over 32 years (1981–2012) in Castelporziano (Rome, central Italy) with the objective to identify changes in climate seasonality and trend components. The AI decreased in the last 16 years (1997–2012) compared with the previous time interval (1981–1996). The largest decline was observed in spring and summer, especially in April and June. Time series analysis indicates a trend towards aridity with both seasonal and annual components and a moderate 6-years cycle component. Irregularities in time series indicate three distinct dry periods with a persistently high aridity index (1988–1989, 2003 and 2006–2007). These time intervals represent exceptional drought episodes in central Italy and confirm the general trend observed at the national level. The implications of the increased aridity in Castelporziano forest are finally discussed in the light of preservation of a typical agro-forest landscape in the Tyrrhenian coast around Rome.