Acta Geophysica

, Volume 67, Issue 1, pp 167–176 | Cite as

Analysis of heterogeneity of aridity index periodicity over Lebanon

  • Luciano TelescaEmail author
  • Amin Shaban
  • Mohamad Awad
Research Article - Hydrology


Lebanon, with its geographic location facing the Mediterranean Sea and dominant rugged topography, is characterized by a strong climatic variability even between zones located few kilometres apart. The investigation of the climatic indices is necessary to delineate such diverse climatic situation over Lebanon. In this context, this paper investigates the periodic behaviour in annual Emberger aridity index (AIE) of 14 weather stations in representative sites of Lebanon. The AIE indicates that the dominant climate of Lebanon, which is mainly varying from humid to semi-arid, follows cyclonic meteorological patterns. The periodicities of AIE identified by using a robust technique seem almost altitude related and range between 2 and 21 years. The geographic distribution of periodicities implies two major zones in the northern and southern parts of Lebanon, being featured by longer and shorter periodicities, respectively. The formation of these two periodicity zones can be related to regional climatic zoning. The remarkable diversity in periodicity indicates predominant microclimates with specified cyclonic climate that characterizes Lebanon’s climate rather than a merely existence of climate change.


Precipitation Climatic indices Aridity 



This study was supported by the CNR-CNRSL Project 2017-2018.

Compliance with ethical standards

Conflict of interest

The authors declare that no conflict of interests exists.

Supplementary material

11600_2018_243_MOESM1_ESM.docx (175 kb)
Supplementary material 1 (DOCX 174 kb)
11600_2018_243_MOESM2_ESM.docx (86 kb)
Supplementary material 2 (DOCX 85 kb)


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Copyright information

© Institute of Geophysics, Polish Academy of Sciences & Polish Academy of Sciences 2019

Authors and Affiliations

  1. 1.CNRIstituto di Metodologie per l’Analisi AmbientaleTitoItaly
  2. 2.CNRS-LNational Council for Scientific ResearchBeirutLebanon

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