DATE2022-06-20 15:52:01
TITLEEvaluation of Heat Waves and Climate Indexes Correlation Between Northern and Southern Mediterranean
AUTHORSZaher Alabadla (0)
  1. 1) Cairo University, Cairo (Egypt)
ABSTRACTMediterranean regions are likely to pay a heavy price for global warming, despite having contributed little to its cause. This paper presents an analysis of heat waves and possible tele connected climate indexes between southern (Matrouh in Egypt) and northern (Antalya in Turkey) Mediterranean. Temperature and precipitation data Gathered from High-resolution gridded datasets of Climatic Research Unit (CRU) from 1950 to 2019. The negative relationships were founding between February-NAO and May-NAO with average annual precipitation over Antalya and Matrouh respectively. Negative correlation observed between average annual precipitation of Matrouh and September-AMO. Negative relationships were strengthened and attained higher significant levels between monthly NAO and average monthly winter temperatures. It is noted that March-NAO attained the highest significant with average winter temperature of both Antalya and Matrouh. Positive correlation found between average winter temperature of Matrouh and Antalya with March-IOD and February-IOD respectively. The results of this study lead to the conclusion that the North Atlantic atmospheric circulation (NAO) has strong impact and significant connection to the temperature and precipitation variability over northern and southern Mediterranean. Negative NAO is associated with warmer temperature and bring more than average precipitation conditions, the opposite with positive NAO. In the warm phase of the Atlantic Multidecadal Oscillation (AMO) there is a large increase in precipitation over the Southern Mediterranean. There is a direct relationship between Indian Ocean Dipole (IOD) and North Atlantic Oscillation (NAO). The difference in heat waves indices between the north and south of the Mediterranean is only in heat wave amplitude (HWA). Decreased in the number of discrete cold wave events begins nearly from 1957 and continue until 2019 for Antalya. The impact of climatic changes on the northern Mediterranean is more pronounced than on the southern Mediterranean.