Orographic Precipitation Simulated by a Super-High Resolution Global Climate Model over the Middle East

Pinhas Alpert, Fengjun Jin, Haim Shafir

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review


A super-high resolution (20 km) global climate model data and Climate Research Unit (CRU) data were employed to investigate the seasonal precipitation regime over the Middle East, and the main research focus is on the orographic rainfall effects over a large part of Turkey by using these two different datasets. Results show that the 20 km regional precipitation over high mountains behaves differently in the 20 km resolution as compared to the CRU data for the time period of 1979-2002. The orographic precipitation over Turkey simulated by the 20 km GCM shows that, the amount of seasonal precipitation has significant relation with the altitude, which is not as pronounced in the CRU data. The area mean precipitation from the 20 km GCM is higher than that of CRU both for the wet and the dry seasons, with the mean value of about 25% and 39% higher, respectively. Results suggest that the higher resolution model is essential, especially in capturing the orographic precipitation over high altitudes.

Original languageEnglish
Title of host publicationNational Security and Human Health Implications of Climate Change
EditorsH.J.S. Fernando, Z.B. Klaic, J.L. McCulley
PublisherDordrecht: Springer Netherlands
Number of pages6
ISBN (Print)9789400724297
StatePublished - 2012

Publication series

NameNATO Science for Peace and Security Series C: Environmental Security
ISSN (Print)1874-6519


  • Climate model
  • Mediterranean
  • Middle East
  • Orographic precipitation


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