Preprints
https://doi.org/10.5194/esd-2022-10
https://doi.org/10.5194/esd-2022-10
 
25 Mar 2022
25 Mar 2022
Status: this preprint is currently under review for the journal ESD.

A 20-year satellite-reanalysis-based climatology of extreme precipitation characteristics over the Sinai Peninsula

Mohsen Soltani1, Bert Hamelers1,2, Abbas Mofidi3, Ties van der Hoeven4, Arie Staal5, Stefan C. Dekker5, Joel Arnault6, Patrick Laux6,7, Harald Kunstmann6,7, and Maarten Lanters4 Mohsen Soltani et al.
  • 1Natural Water Production Theme, European Centre of Excellence for Sustainable Water Technology (Wetsus), Leeuwarden, Netherlands
  • 2Sub-department of Environmental Technology, Wageningen University, Wageningen, Netherlands
  • 3Geography department, Ferdowsi University of Mashhad, Mashhad, Iran
  • 4The Weather Makers B.V., Burgemeester Loeffplein, 'S-Hertogenbosch, Netherlands
  • 5Department of Environmental Sciences, Copernicus Institute, Utrecht University, Utrecht, Netherlands
  • 6Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Garmisch-Partenkirchen, Germany
  • 7Institute of Geography, University of Augsburg, Augsburg, Germany

Abstract. Extreme precipitation events and associated flash floods caued by the synoptic cyclonic-systems have profound impacts on society and the environment particularly in dry regions. This study brings forward a satellite-reanalysis-based approach to quantify the extreme precipitation characteristics over the Sinai Desert in Egypt, from a statistical-synoptic perspective for the period of 2001–2020. Using the satellite remote-sensing precipitation and a set of climate indices, we characterize the spatiotemporal distribution of extreme rainfall climatologies across the Sinai region. Then, using the reanalysis dataset, the synoptic systems responsible for the occurrence of precipitation events along with the major tracks of cyclones during the wet and dry periods are explored. Our results indicate that the temporal changes and spatial patterns of the precipitation events do not show a homogenous tendency, rather lack of spatiotemporal coherence across the Sinai. Northern parts of the Sinai, unlike other areas, exhibit the highest anomalies (approx. ±45 mm/decade); and the annual rainfall trends indicate a drier-climate in the north at −0.03 mm/decade, while a wetter-climate is observed in the central and southern parts at 0.10 and 0.36 mm/decade, respectively. The Mediterranean cyclones accompanied by the Red Sea -and Persian Troughs are responsible for the majority of extreme rainfall events all-round the year. A remarkable spatial relationship between the Sinai’s rainfall and the atmospheric variables of sea level pressure, wind direction and vertical velocity is found. Furthermore, the cyclone-tracking analysis indicates that 125 and 31 cyclones (rainfall ≥ 10mm/day) either formed within -or transferred to the Mediterranean basin and precipitated over the Sinai during wet and dry periods, respectively; while some (~15 % with rainfall > 40mm/day) being capable of leading to flash flood in the wet period of the region. This study, therefore, sheds new light on the extreme rainfall characteristics and the dominant synoptic mechanisms over the Sinai region in the eastern Mediterranean basin.

Mohsen Soltani et al.

Status: open (until 30 Jun 2022)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on esd-2022-10', Shanlei Sun, 09 May 2022 reply

Mohsen Soltani et al.

Mohsen Soltani et al.

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Short summary
The temporal changes and spatial patterns of the precipitation events do not show a homogenous tendency across the Sinai Peninsula. The Mediterranean cyclones accompanied by the Red Sea -and Persian Troughs are responsible for the majority of Sinai's extreme rainfall events. The cyclone-tracking captures 156 cyclones (rainfall ≥ 10 mm/day) either formed within -or transferred to the Mediterranean basin and precipitated over the Sinai.
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