GEO-6 Regional Asssement for West Asia


Figure 2.6.1: Mean annual rainfall, temperature and annual minimum temperature for the Arabian Peninsula, 1979–2009. The lowest mean annual rainfall (< 80 mm) occurred over Rub Al-Khali and the sand desert area to the west of the Arabian Peninsula. The wettest region is the southwest of the Arabian Peninsula (>150 mm). Mean temperatures in the Arabian Peninsula varied from 21⁰C-27⁰C, with the highest temperatures (>27⁰C) occurring over the Rub Al-Khali. Mean annual minimum temperatures were as low as 6⁰C-16⁰C in the north western and southwestern regions of the Arabian Peninsula.


Sources: (left) CMAP; (entre) CRU; and (right) observed datasets, averages over 1979–2009; Almazroui 2012; Almazroui et al. 2012


coastal areas relative to 1986–2005 levels. Precipitation would increase over much of the United Arab Emirates (UAE), the Hajar Mountains, Qatar and the ROPME Sea Area. Oman and eastern Saudi Arabia are projected to see a decrease in rainfall. Projections also show that much of the precipitation would occur in heavier but fewer rainfall events (AGEDI 2015).


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Projections of temperature and rainfall distribution up to 2100 have also been made for the Arab region. Average atmospheric temperatures for 2081–2100 are projected to increase by 1–3°C in the medium emissions scenario (RCP 4.5) and by 2–5°C in the highest emissions scenario (RCP 8.5).


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