Theoretical and Applied Climatology

, Volume 124, Issue 3–4, pp 959–972 | Cite as

Trends in indices of daily temperature and precipitations extremes in Morocco

  • S. FilahiEmail author
  • M. Tanarhte
  • L. Mouhir
  • M. El Morhit
  • Y. Tramblay
Original Paper


The purpose of this paper is to provide a summary of Morocco’s climate extreme trends during the last four decades. Indices were computed based on a daily temperature and precipitation using a consistent approach recommended by the ETCCDI. Trends in these indices were calculated at 20 stations from 1970 to 2012. Twelve indices were considered to detect trends in temperature. A large number of stations have significant trends and confirm an increase in temperature, showing increased warming during spring and summer seasons. The results also show a decrease in the number of cold days and nights and an increase in the number of warm days and nights. Increasing trends have also been found in the absolute warmest and coldest temperatures of the year. A clear increase is detected for warm nights and diurnal temperature range. Eight indices for precipitation were also analyzed, but the trends for these precipitation indices are much less significant than for temperature indices and show more mixed spatial patterns of change. Heavy precipitation events do not exhibit significant trends except at a few locations, in the north and central parts of Morocco, with a general tendency towards drier conditions. The correlation between these climate indices and the large-scale atmospheric circulations indices such as the NAO, MO, and WEMO were also analyzed. Results show a stronger relationship with these climatic indices for the precipitation indices compared to the temperature indices. The correlations are more significant in the Atlantic regions, but they remain moderate at the whole country scale.


Significant Trend Precipitation Extreme North Atlantic Oscillation North Atlantic Oscillation Index Precipitation Index 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Wien 2015

Authors and Affiliations

  • S. Filahi
    • 1
    • 3
    Email author
  • M. Tanarhte
    • 2
    • 3
  • L. Mouhir
    • 3
  • M. El Morhit
    • 4
  • Y. Tramblay
    • 5
  1. 1.Direction de la Météorologie NationaleCasablancaMorocco
  2. 2.Max Planck Institute for ChemistryMainzGermany
  3. 3.Laboratory of Process Engineering and Environment, Faculty of Sciences and TechniquesUniversity of Hassan IIMohammediaMorocco
  4. 4.Laboratory of Microbiology, Research Team HealthUniversity Mohammed-V-SouissiRabatMorocco
  5. 5.IRDHydroSciences Montpellier, UMR 5569MontpellierFrance

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